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opendigitaleducation/sijil.js
docs/libs/typescript.js
isSymbolAccessible
function isSymbolAccessible(symbol, enclosingDeclaration, meaning, shouldComputeAliasesToMakeVisible) { if (symbol && enclosingDeclaration && !(symbol.flags & 262144 /* TypeParameter */)) { var initialSymbol = symbol; var meaningToLook = meaning; while (symbol) { // Symbol is accessible if it by itself is accessible var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false); if (accessibleSymbolChain) { var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0], shouldComputeAliasesToMakeVisible); if (!hasAccessibleDeclarations) { return { accessibility: 1 /* NotAccessible */, errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning), errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1920 /* Namespace */) : undefined }; } return hasAccessibleDeclarations; } // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible. // It could be a qualified symbol and hence verify the path // e.g.: // module m { // export class c { // } // } // const x: typeof m.c // In the above example when we start with checking if typeof m.c symbol is accessible, // we are going to see if c can be accessed in scope directly. // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible // It is accessible if the parent m is accessible because then m.c can be accessed through qualification meaningToLook = getQualifiedLeftMeaning(meaning); symbol = getParentOfSymbol(symbol); } // This could be a symbol that is not exported in the external module // or it could be a symbol from different external module that is not aliased and hence cannot be named var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer); if (symbolExternalModule) { var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration); if (symbolExternalModule !== enclosingExternalModule) { // name from different external module that is not visible return { accessibility: 2 /* CannotBeNamed */, errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning), errorModuleName: symbolToString(symbolExternalModule) }; } } // Just a local name that is not accessible return { accessibility: 1 /* NotAccessible */, errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning) }; } return { accessibility: 0 /* Accessible */ }; function getExternalModuleContainer(declaration) { for (; declaration; declaration = declaration.parent) { if (hasExternalModuleSymbol(declaration)) { return getSymbolOfNode(declaration); } } } }
javascript
function isSymbolAccessible(symbol, enclosingDeclaration, meaning, shouldComputeAliasesToMakeVisible) { if (symbol && enclosingDeclaration && !(symbol.flags & 262144 /* TypeParameter */)) { var initialSymbol = symbol; var meaningToLook = meaning; while (symbol) { // Symbol is accessible if it by itself is accessible var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false); if (accessibleSymbolChain) { var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0], shouldComputeAliasesToMakeVisible); if (!hasAccessibleDeclarations) { return { accessibility: 1 /* NotAccessible */, errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning), errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1920 /* Namespace */) : undefined }; } return hasAccessibleDeclarations; } // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible. // It could be a qualified symbol and hence verify the path // e.g.: // module m { // export class c { // } // } // const x: typeof m.c // In the above example when we start with checking if typeof m.c symbol is accessible, // we are going to see if c can be accessed in scope directly. // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible // It is accessible if the parent m is accessible because then m.c can be accessed through qualification meaningToLook = getQualifiedLeftMeaning(meaning); symbol = getParentOfSymbol(symbol); } // This could be a symbol that is not exported in the external module // or it could be a symbol from different external module that is not aliased and hence cannot be named var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer); if (symbolExternalModule) { var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration); if (symbolExternalModule !== enclosingExternalModule) { // name from different external module that is not visible return { accessibility: 2 /* CannotBeNamed */, errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning), errorModuleName: symbolToString(symbolExternalModule) }; } } // Just a local name that is not accessible return { accessibility: 1 /* NotAccessible */, errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning) }; } return { accessibility: 0 /* Accessible */ }; function getExternalModuleContainer(declaration) { for (; declaration; declaration = declaration.parent) { if (hasExternalModuleSymbol(declaration)) { return getSymbolOfNode(declaration); } } } }
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Check if the given symbol in given enclosing declaration is accessible and mark all associated alias to be visible if requested @param symbol a Symbol to check if accessible @param enclosingDeclaration a Node containing reference to the symbol @param meaning a SymbolFlags to check if such meaning of the symbol is accessible @param shouldComputeAliasToMakeVisible a boolean value to indicate whether to return aliases to be mark visible in case the symbol is accessible
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L18705-L18766
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
appendPropertyOrElementAccessForSymbol
function appendPropertyOrElementAccessForSymbol(symbol, writer) { var symbolName = getNameOfSymbol(symbol); var firstChar = symbolName.charCodeAt(0); var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion); if (needsElementAccess) { writePunctuation(writer, 19 /* OpenBracketToken */); if (ts.isSingleOrDoubleQuote(firstChar)) { writer.writeStringLiteral(symbolName); } else { writer.writeSymbol(symbolName, symbol); } writePunctuation(writer, 20 /* CloseBracketToken */); } else { writePunctuation(writer, 21 /* DotToken */); writer.writeSymbol(symbolName, symbol); } }
javascript
function appendPropertyOrElementAccessForSymbol(symbol, writer) { var symbolName = getNameOfSymbol(symbol); var firstChar = symbolName.charCodeAt(0); var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion); if (needsElementAccess) { writePunctuation(writer, 19 /* OpenBracketToken */); if (ts.isSingleOrDoubleQuote(firstChar)) { writer.writeStringLiteral(symbolName); } else { writer.writeSymbol(symbolName, symbol); } writePunctuation(writer, 20 /* CloseBracketToken */); } else { writePunctuation(writer, 21 /* DotToken */); writer.writeSymbol(symbolName, symbol); } }
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Writes a property access or element access with the name of the symbol out to the writer. Uses the original source text for the name of the symbol if it is available to match how the user wrote the name, ensuring that any names written with literals use element accesses.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L18953-L18971
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
buildSymbolDisplay
function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) { var parentSymbol; function appendParentTypeArgumentsAndSymbolName(symbol) { if (parentSymbol) { // Write type arguments of instantiated class/interface here if (flags & 1 /* WriteTypeParametersOrArguments */) { if (symbol.flags & 16777216 /* Instantiated */) { buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration); } else { buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration); } } appendPropertyOrElementAccessForSymbol(symbol, writer); } else { appendSymbolNameOnly(symbol, writer); } parentSymbol = symbol; } // const the writer know we just wrote out a symbol. The declaration emitter writer uses // this to determine if an import it has previously seen (and not written out) needs // to be written to the file once the walk of the tree is complete. // // NOTE(cyrusn): This approach feels somewhat unfortunate. A simple pass over the tree // up front (for example, during checking) could determine if we need to emit the imports // and we could then access that data during declaration emit. writer.trackSymbol(symbol, enclosingDeclaration, meaning); function walkSymbol(symbol, meaning) { if (symbol) { var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2 /* UseOnlyExternalAliasing */)); if (!accessibleSymbolChain || needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) { // Go up and add our parent. walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning)); } if (accessibleSymbolChain) { for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) { var accessibleSymbol = accessibleSymbolChain_1[_i]; appendParentTypeArgumentsAndSymbolName(accessibleSymbol); } } else { // If we didn't find accessible symbol chain for this symbol, break if this is external module if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) { return; } // if this is anonymous type break if (symbol.flags & 2048 /* TypeLiteral */ || symbol.flags & 4096 /* ObjectLiteral */) { return; } appendParentTypeArgumentsAndSymbolName(symbol); } } } // Get qualified name if the symbol is not a type parameter // and there is an enclosing declaration or we specifically // asked for it var isTypeParameter = symbol.flags & 262144 /* TypeParameter */; var typeFormatFlag = 128 /* UseFullyQualifiedType */ & typeFlags; if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) { walkSymbol(symbol, meaning); return; } return appendParentTypeArgumentsAndSymbolName(symbol); }
javascript
function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) { var parentSymbol; function appendParentTypeArgumentsAndSymbolName(symbol) { if (parentSymbol) { // Write type arguments of instantiated class/interface here if (flags & 1 /* WriteTypeParametersOrArguments */) { if (symbol.flags & 16777216 /* Instantiated */) { buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration); } else { buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration); } } appendPropertyOrElementAccessForSymbol(symbol, writer); } else { appendSymbolNameOnly(symbol, writer); } parentSymbol = symbol; } // const the writer know we just wrote out a symbol. The declaration emitter writer uses // this to determine if an import it has previously seen (and not written out) needs // to be written to the file once the walk of the tree is complete. // // NOTE(cyrusn): This approach feels somewhat unfortunate. A simple pass over the tree // up front (for example, during checking) could determine if we need to emit the imports // and we could then access that data during declaration emit. writer.trackSymbol(symbol, enclosingDeclaration, meaning); function walkSymbol(symbol, meaning) { if (symbol) { var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2 /* UseOnlyExternalAliasing */)); if (!accessibleSymbolChain || needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) { // Go up and add our parent. walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning)); } if (accessibleSymbolChain) { for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) { var accessibleSymbol = accessibleSymbolChain_1[_i]; appendParentTypeArgumentsAndSymbolName(accessibleSymbol); } } else { // If we didn't find accessible symbol chain for this symbol, break if this is external module if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) { return; } // if this is anonymous type break if (symbol.flags & 2048 /* TypeLiteral */ || symbol.flags & 4096 /* ObjectLiteral */) { return; } appendParentTypeArgumentsAndSymbolName(symbol); } } } // Get qualified name if the symbol is not a type parameter // and there is an enclosing declaration or we specifically // asked for it var isTypeParameter = symbol.flags & 262144 /* TypeParameter */; var typeFormatFlag = 128 /* UseFullyQualifiedType */ & typeFlags; if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) { walkSymbol(symbol, meaning); return; } return appendParentTypeArgumentsAndSymbolName(symbol); }
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Enclosing declaration is optional when we don't want to get qualified name in the enclosing declaration scope Meaning needs to be specified if the enclosing declaration is given
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L18976-L19041
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
pushTypeResolution
function pushTypeResolution(target, propertyName) { var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName); if (resolutionCycleStartIndex >= 0) { // A cycle was found var length_2 = resolutionTargets.length; for (var i = resolutionCycleStartIndex; i < length_2; i++) { resolutionResults[i] = false; } return false; } resolutionTargets.push(target); resolutionResults.push(/*items*/ true); resolutionPropertyNames.push(propertyName); return true; }
javascript
function pushTypeResolution(target, propertyName) { var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName); if (resolutionCycleStartIndex >= 0) { // A cycle was found var length_2 = resolutionTargets.length; for (var i = resolutionCycleStartIndex; i < length_2; i++) { resolutionResults[i] = false; } return false; } resolutionTargets.push(target); resolutionResults.push(/*items*/ true); resolutionPropertyNames.push(propertyName); return true; }
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Push an entry on the type resolution stack. If an entry with the given target and the given property name is already on the stack, and no entries in between already have a type, then a circularity has occurred. In this case, the result values of the existing entry and all entries pushed after it are changed to false, and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned. In order to see if the same query has already been done before, the target object and the propertyName both must match the one passed in. @param target The symbol, type, or signature whose type is being queried @param propertyName The property name that should be used to query the target for its type
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L19670-L19684
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getTypeForBindingElement
function getTypeForBindingElement(declaration) { var pattern = declaration.parent; var parentType = getTypeForBindingElementParent(pattern.parent); // If parent has the unknown (error) type, then so does this binding element if (parentType === unknownType) { return unknownType; } // If no type was specified or inferred for parent, or if the specified or inferred type is any, // infer from the initializer of the binding element if one is present. Otherwise, go with the // undefined or any type of the parent. if (!parentType || isTypeAny(parentType)) { if (declaration.initializer) { return checkExpressionCached(declaration.initializer); } return parentType; } var type; if (pattern.kind === 167 /* ObjectBindingPattern */) { // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form) var name_11 = declaration.propertyName || declaration.name; if (isComputedNonLiteralName(name_11)) { // computed properties with non-literal names are treated as 'any' return anyType; } if (declaration.initializer) { getContextualType(declaration.initializer); } // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature, // or otherwise the type of the string index signature. var text = getTextOfPropertyName(name_11); type = getTypeOfPropertyOfType(parentType, text) || isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) || getIndexTypeOfType(parentType, 0 /* String */); if (!type) { error(name_11, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_11)); return unknownType; } } else { // This elementType will be used if the specific property corresponding to this index is not // present (aka the tuple element property). This call also checks that the parentType is in // fact an iterable or array (depending on target language). var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false); if (!declaration.dotDotDotToken) { // Use specific property type when parent is a tuple or numeric index type when parent is an array var propName = "" + ts.indexOf(pattern.elements, declaration); type = isTupleLikeType(parentType) ? getTypeOfPropertyOfType(parentType, propName) : elementType; if (!type) { if (isTupleType(parentType)) { error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), getTypeReferenceArity(parentType), pattern.elements.length); } else { error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName); } return unknownType; } } else { // Rest element has an array type with the same element type as the parent type type = createArrayType(elementType); } } // In strict null checking mode, if a default value of a non-undefined type is specified, remove // undefined from the final type. if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkExpressionCached(declaration.initializer)) & 2048 /* Undefined */)) { type = getTypeWithFacts(type, 131072 /* NEUndefined */); } return declaration.initializer ? getUnionType([type, checkExpressionCached(declaration.initializer)], /*subtypeReduction*/ true) : type; }
javascript
function getTypeForBindingElement(declaration) { var pattern = declaration.parent; var parentType = getTypeForBindingElementParent(pattern.parent); // If parent has the unknown (error) type, then so does this binding element if (parentType === unknownType) { return unknownType; } // If no type was specified or inferred for parent, or if the specified or inferred type is any, // infer from the initializer of the binding element if one is present. Otherwise, go with the // undefined or any type of the parent. if (!parentType || isTypeAny(parentType)) { if (declaration.initializer) { return checkExpressionCached(declaration.initializer); } return parentType; } var type; if (pattern.kind === 167 /* ObjectBindingPattern */) { // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form) var name_11 = declaration.propertyName || declaration.name; if (isComputedNonLiteralName(name_11)) { // computed properties with non-literal names are treated as 'any' return anyType; } if (declaration.initializer) { getContextualType(declaration.initializer); } // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature, // or otherwise the type of the string index signature. var text = getTextOfPropertyName(name_11); type = getTypeOfPropertyOfType(parentType, text) || isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) || getIndexTypeOfType(parentType, 0 /* String */); if (!type) { error(name_11, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_11)); return unknownType; } } else { // This elementType will be used if the specific property corresponding to this index is not // present (aka the tuple element property). This call also checks that the parentType is in // fact an iterable or array (depending on target language). var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false); if (!declaration.dotDotDotToken) { // Use specific property type when parent is a tuple or numeric index type when parent is an array var propName = "" + ts.indexOf(pattern.elements, declaration); type = isTupleLikeType(parentType) ? getTypeOfPropertyOfType(parentType, propName) : elementType; if (!type) { if (isTupleType(parentType)) { error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), getTypeReferenceArity(parentType), pattern.elements.length); } else { error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName); } return unknownType; } } else { // Rest element has an array type with the same element type as the parent type type = createArrayType(elementType); } } // In strict null checking mode, if a default value of a non-undefined type is specified, remove // undefined from the final type. if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkExpressionCached(declaration.initializer)) & 2048 /* Undefined */)) { type = getTypeWithFacts(type, 131072 /* NEUndefined */); } return declaration.initializer ? getUnionType([type, checkExpressionCached(declaration.initializer)], /*subtypeReduction*/ true) : type; }
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Return the inferred type for a binding element
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L19779-L19851
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getTypeForVariableLikeDeclaration
function getTypeForVariableLikeDeclaration(declaration, includeOptionality) { if (declaration.flags & 134217728 /* JavaScriptFile */) { // If this is a variable in a JavaScript file, then use the JSDoc type (if it has // one as its type), otherwise fallback to the below standard TS codepaths to // try to figure it out. var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration); if (type && type !== unknownType) { return type; } } // A variable declared in a for..in statement is always of type string if (declaration.parent.parent.kind === 207 /* ForInStatement */) { return stringType; } if (declaration.parent.parent.kind === 208 /* ForOfStatement */) { // checkRightHandSideOfForOf will return undefined if the for-of expression type was // missing properties/signatures required to get its iteratedType (like // [Symbol.iterator] or next). This may be because we accessed properties from anyType, // or it may have led to an error inside getElementTypeOfIterable. return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType; } if (ts.isBindingPattern(declaration.parent)) { return getTypeForBindingElement(declaration); } // Use type from type annotation if one is present if (declaration.type) { return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality); } if (declaration.kind === 142 /* Parameter */) { var func = declaration.parent; // For a parameter of a set accessor, use the type of the get accessor if one is present if (func.kind === 150 /* SetAccessor */ && !ts.hasDynamicName(func)) { var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149 /* GetAccessor */); if (getter) { var getterSignature = getSignatureFromDeclaration(getter); var thisParameter = getAccessorThisParameter(func); if (thisParameter && declaration === thisParameter) { // Use the type from the *getter* ts.Debug.assert(!thisParameter.type); return getTypeOfSymbol(getterSignature.thisParameter); } return getReturnTypeOfSignature(getterSignature); } } // Use contextual parameter type if one is available var type = void 0; if (declaration.symbol.name === "this") { var thisParameter = getContextualThisParameter(func); type = thisParameter ? getTypeOfSymbol(thisParameter) : undefined; } else { type = getContextuallyTypedParameterType(declaration); } if (type) { return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality); } } // Use the type of the initializer expression if one is present if (declaration.initializer) { return addOptionality(checkExpressionCached(declaration.initializer), /*optional*/ declaration.questionToken && includeOptionality); } // If it is a short-hand property assignment, use the type of the identifier if (declaration.kind === 254 /* ShorthandPropertyAssignment */) { return checkIdentifier(declaration.name); } // If the declaration specifies a binding pattern, use the type implied by the binding pattern if (ts.isBindingPattern(declaration.name)) { return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false, /*reportErrors*/ true); } // No type specified and nothing can be inferred return undefined; }
javascript
function getTypeForVariableLikeDeclaration(declaration, includeOptionality) { if (declaration.flags & 134217728 /* JavaScriptFile */) { // If this is a variable in a JavaScript file, then use the JSDoc type (if it has // one as its type), otherwise fallback to the below standard TS codepaths to // try to figure it out. var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration); if (type && type !== unknownType) { return type; } } // A variable declared in a for..in statement is always of type string if (declaration.parent.parent.kind === 207 /* ForInStatement */) { return stringType; } if (declaration.parent.parent.kind === 208 /* ForOfStatement */) { // checkRightHandSideOfForOf will return undefined if the for-of expression type was // missing properties/signatures required to get its iteratedType (like // [Symbol.iterator] or next). This may be because we accessed properties from anyType, // or it may have led to an error inside getElementTypeOfIterable. return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType; } if (ts.isBindingPattern(declaration.parent)) { return getTypeForBindingElement(declaration); } // Use type from type annotation if one is present if (declaration.type) { return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality); } if (declaration.kind === 142 /* Parameter */) { var func = declaration.parent; // For a parameter of a set accessor, use the type of the get accessor if one is present if (func.kind === 150 /* SetAccessor */ && !ts.hasDynamicName(func)) { var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149 /* GetAccessor */); if (getter) { var getterSignature = getSignatureFromDeclaration(getter); var thisParameter = getAccessorThisParameter(func); if (thisParameter && declaration === thisParameter) { // Use the type from the *getter* ts.Debug.assert(!thisParameter.type); return getTypeOfSymbol(getterSignature.thisParameter); } return getReturnTypeOfSignature(getterSignature); } } // Use contextual parameter type if one is available var type = void 0; if (declaration.symbol.name === "this") { var thisParameter = getContextualThisParameter(func); type = thisParameter ? getTypeOfSymbol(thisParameter) : undefined; } else { type = getContextuallyTypedParameterType(declaration); } if (type) { return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality); } } // Use the type of the initializer expression if one is present if (declaration.initializer) { return addOptionality(checkExpressionCached(declaration.initializer), /*optional*/ declaration.questionToken && includeOptionality); } // If it is a short-hand property assignment, use the type of the identifier if (declaration.kind === 254 /* ShorthandPropertyAssignment */) { return checkIdentifier(declaration.name); } // If the declaration specifies a binding pattern, use the type implied by the binding pattern if (ts.isBindingPattern(declaration.name)) { return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false, /*reportErrors*/ true); } // No type specified and nothing can be inferred return undefined; }
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Return the inferred type for a variable, parameter, or property declaration
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L19887-L19958
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getTypeFromBindingElement
function getTypeFromBindingElement(element, includePatternInType, reportErrors) { if (element.initializer) { return checkExpressionCached(element.initializer); } if (ts.isBindingPattern(element.name)) { return getTypeFromBindingPattern(element.name, includePatternInType, reportErrors); } if (reportErrors && compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) { reportImplicitAnyError(element, anyType); } return anyType; }
javascript
function getTypeFromBindingElement(element, includePatternInType, reportErrors) { if (element.initializer) { return checkExpressionCached(element.initializer); } if (ts.isBindingPattern(element.name)) { return getTypeFromBindingPattern(element.name, includePatternInType, reportErrors); } if (reportErrors && compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) { reportImplicitAnyError(element, anyType); } return anyType; }
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Return the type implied by a binding pattern element. This is the type of the initializer of the element if one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding pattern. Otherwise, it is the type any.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L19962-L19973
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getTypeFromObjectBindingPattern
function getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors) { var members = ts.createMap(); var hasComputedProperties = false; ts.forEach(pattern.elements, function (e) { var name = e.propertyName || e.name; if (isComputedNonLiteralName(name)) { // do not include computed properties in the implied type hasComputedProperties = true; return; } var text = getTextOfPropertyName(name); var flags = 4 /* Property */ | 67108864 /* Transient */ | (e.initializer ? 536870912 /* Optional */ : 0); var symbol = createSymbol(flags, text); symbol.type = getTypeFromBindingElement(e, includePatternInType, reportErrors); symbol.bindingElement = e; members[symbol.name] = symbol; }); var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined); if (includePatternInType) { result.pattern = pattern; } if (hasComputedProperties) { result.flags |= 536870912 /* ObjectLiteralPatternWithComputedProperties */; } return result; }
javascript
function getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors) { var members = ts.createMap(); var hasComputedProperties = false; ts.forEach(pattern.elements, function (e) { var name = e.propertyName || e.name; if (isComputedNonLiteralName(name)) { // do not include computed properties in the implied type hasComputedProperties = true; return; } var text = getTextOfPropertyName(name); var flags = 4 /* Property */ | 67108864 /* Transient */ | (e.initializer ? 536870912 /* Optional */ : 0); var symbol = createSymbol(flags, text); symbol.type = getTypeFromBindingElement(e, includePatternInType, reportErrors); symbol.bindingElement = e; members[symbol.name] = symbol; }); var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined); if (includePatternInType) { result.pattern = pattern; } if (hasComputedProperties) { result.flags |= 536870912 /* ObjectLiteralPatternWithComputedProperties */; } return result; }
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Return the type implied by an object binding pattern
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L19975-L20000
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getTypeFromArrayBindingPattern
function getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors) { var elements = pattern.elements; if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) { return languageVersion >= 2 /* ES6 */ ? createIterableType(anyType) : anyArrayType; } // If the pattern has at least one element, and no rest element, then it should imply a tuple type. var elementTypes = ts.map(elements, function (e) { return e.kind === 193 /* OmittedExpression */ ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors); }); var result = createTupleType(elementTypes); if (includePatternInType) { result = cloneTypeReference(result); result.pattern = pattern; } return result; }
javascript
function getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors) { var elements = pattern.elements; if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) { return languageVersion >= 2 /* ES6 */ ? createIterableType(anyType) : anyArrayType; } // If the pattern has at least one element, and no rest element, then it should imply a tuple type. var elementTypes = ts.map(elements, function (e) { return e.kind === 193 /* OmittedExpression */ ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors); }); var result = createTupleType(elementTypes); if (includePatternInType) { result = cloneTypeReference(result); result.pattern = pattern; } return result; }
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Return the type implied by an array binding pattern
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L20002-L20015
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
appendTypeParameters
function appendTypeParameters(typeParameters, declarations) { for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) { var declaration = declarations_2[_i]; var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration)); if (!typeParameters) { typeParameters = [tp]; } else if (!ts.contains(typeParameters, tp)) { typeParameters.push(tp); } } return typeParameters; }
javascript
function appendTypeParameters(typeParameters, declarations) { for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) { var declaration = declarations_2[_i]; var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration)); if (!typeParameters) { typeParameters = [tp]; } else if (!ts.contains(typeParameters, tp)) { typeParameters.push(tp); } } return typeParameters; }
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Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set. The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set in-place and returns the same array.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L20282-L20294
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
appendOuterTypeParameters
function appendOuterTypeParameters(typeParameters, node) { while (true) { node = node.parent; if (!node) { return typeParameters; } if (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */ || node.kind === 220 /* FunctionDeclaration */ || node.kind === 179 /* FunctionExpression */ || node.kind === 147 /* MethodDeclaration */ || node.kind === 180 /* ArrowFunction */) { var declarations = node.typeParameters; if (declarations) { return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations); } } } }
javascript
function appendOuterTypeParameters(typeParameters, node) { while (true) { node = node.parent; if (!node) { return typeParameters; } if (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */ || node.kind === 220 /* FunctionDeclaration */ || node.kind === 179 /* FunctionExpression */ || node.kind === 147 /* MethodDeclaration */ || node.kind === 180 /* ArrowFunction */) { var declarations = node.typeParameters; if (declarations) { return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations); } } } }
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Appends the outer type parameters of a node to a set of type parameters and returns the resulting set. The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set in-place and returns the same array.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L20298-L20313
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getOuterTypeParametersOfClassOrInterface
function getOuterTypeParametersOfClassOrInterface(symbol) { var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */); return appendOuterTypeParameters(undefined, declaration); }
javascript
function getOuterTypeParametersOfClassOrInterface(symbol) { var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */); return appendOuterTypeParameters(undefined, declaration); }
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The outer type parameters are those defined by enclosing generic classes, methods, or functions.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L20315-L20318
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isIndependentInterface
function isIndependentInterface(symbol) { for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) { var declaration = _a[_i]; if (declaration.kind === 222 /* InterfaceDeclaration */) { if (declaration.flags & 16384 /* ContainsThis */) { return false; } var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration); if (baseTypeNodes) { for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) { var node = baseTypeNodes_1[_b]; if (ts.isEntityNameExpression(node.expression)) { var baseSymbol = resolveEntityName(node.expression, 793064 /* Type */, /*ignoreErrors*/ true); if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) { return false; } } } } } } return true; }
javascript
function isIndependentInterface(symbol) { for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) { var declaration = _a[_i]; if (declaration.kind === 222 /* InterfaceDeclaration */) { if (declaration.flags & 16384 /* ContainsThis */) { return false; } var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration); if (baseTypeNodes) { for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) { var node = baseTypeNodes_1[_b]; if (ts.isEntityNameExpression(node.expression)) { var baseSymbol = resolveEntityName(node.expression, 793064 /* Type */, /*ignoreErrors*/ true); if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) { return false; } } } } } } return true; }
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Returns true if the interface given by the symbol is free of "this" references. Specifically, the result is true if the interface itself contains no references to "this" in its body, if all base types are interfaces, and if none of the base interfaces have a "this" type.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L20498-L20520
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isIndependentType
function isIndependentType(node) { switch (node.kind) { case 117 /* AnyKeyword */: case 132 /* StringKeyword */: case 130 /* NumberKeyword */: case 120 /* BooleanKeyword */: case 133 /* SymbolKeyword */: case 103 /* VoidKeyword */: case 135 /* UndefinedKeyword */: case 93 /* NullKeyword */: case 127 /* NeverKeyword */: case 166 /* LiteralType */: return true; case 160 /* ArrayType */: return isIndependentType(node.elementType); case 155 /* TypeReference */: return isIndependentTypeReference(node); } return false; }
javascript
function isIndependentType(node) { switch (node.kind) { case 117 /* AnyKeyword */: case 132 /* StringKeyword */: case 130 /* NumberKeyword */: case 120 /* BooleanKeyword */: case 133 /* SymbolKeyword */: case 103 /* VoidKeyword */: case 135 /* UndefinedKeyword */: case 93 /* NullKeyword */: case 127 /* NeverKeyword */: case 166 /* LiteralType */: return true; case 160 /* ArrayType */: return isIndependentType(node.elementType); case 155 /* TypeReference */: return isIndependentTypeReference(node); } return false; }
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A type is considered independent if it the any, string, number, boolean, symbol, or void keyword, a string literal type, an array with an element type that is considered independent, or a type reference that is considered independent.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L20715-L20734
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isIndependentMember
function isIndependentMember(symbol) { if (symbol.declarations && symbol.declarations.length === 1) { var declaration = symbol.declarations[0]; if (declaration) { switch (declaration.kind) { case 145 /* PropertyDeclaration */: case 144 /* PropertySignature */: return isIndependentVariableLikeDeclaration(declaration); case 147 /* MethodDeclaration */: case 146 /* MethodSignature */: case 148 /* Constructor */: return isIndependentFunctionLikeDeclaration(declaration); } } } return false; }
javascript
function isIndependentMember(symbol) { if (symbol.declarations && symbol.declarations.length === 1) { var declaration = symbol.declarations[0]; if (declaration) { switch (declaration.kind) { case 145 /* PropertyDeclaration */: case 144 /* PropertySignature */: return isIndependentVariableLikeDeclaration(declaration); case 147 /* MethodDeclaration */: case 146 /* MethodSignature */: case 148 /* Constructor */: return isIndependentFunctionLikeDeclaration(declaration); } } } return false; }
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Returns true if the class or interface member given by the symbol is free of "this" references. The function may return false for symbols that are actually free of "this" references because it is not feasible to perform a complete analysis in all cases. In particular, property members with types inferred from their initializers and function members with inferred return types are conservatively assumed not to be free of "this" references.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L20759-L20775
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
createInstantiatedSymbolTable
function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) { var result = ts.createMap(); for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) { var symbol = symbols_2[_i]; result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper); } return result; }
javascript
function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) { var result = ts.createMap(); for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) { var symbol = symbols_2[_i]; result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper); } return result; }
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The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true, we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L20786-L20793
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getUnionSignatures
function getUnionSignatures(types, kind) { var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); }); var result = undefined; for (var i = 0; i < signatureLists.length; i++) { for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) { var signature = _a[_i]; // Only process signatures with parameter lists that aren't already in the result list if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) { var unionSignatures = findMatchingSignatures(signatureLists, signature, i); if (unionSignatures) { var s = signature; // Union the result types when more than one signature matches if (unionSignatures.length > 1) { s = cloneSignature(signature); if (ts.forEach(unionSignatures, function (sig) { return sig.thisParameter; })) { var thisType = getUnionType(ts.map(unionSignatures, function (sig) { return getTypeOfSymbol(sig.thisParameter) || anyType; }), /*subtypeReduction*/ true); s.thisParameter = createTransientSymbol(signature.thisParameter, thisType); } // Clear resolved return type we possibly got from cloneSignature s.resolvedReturnType = undefined; s.unionSignatures = unionSignatures; } (result || (result = [])).push(s); } } } } return result || emptyArray; }
javascript
function getUnionSignatures(types, kind) { var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); }); var result = undefined; for (var i = 0; i < signatureLists.length; i++) { for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) { var signature = _a[_i]; // Only process signatures with parameter lists that aren't already in the result list if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) { var unionSignatures = findMatchingSignatures(signatureLists, signature, i); if (unionSignatures) { var s = signature; // Union the result types when more than one signature matches if (unionSignatures.length > 1) { s = cloneSignature(signature); if (ts.forEach(unionSignatures, function (sig) { return sig.thisParameter; })) { var thisType = getUnionType(ts.map(unionSignatures, function (sig) { return getTypeOfSymbol(sig.thisParameter) || anyType; }), /*subtypeReduction*/ true); s.thisParameter = createTransientSymbol(signature.thisParameter, thisType); } // Clear resolved return type we possibly got from cloneSignature s.resolvedReturnType = undefined; s.unionSignatures = unionSignatures; } (result || (result = [])).push(s); } } } } return result || emptyArray; }
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The signatures of a union type are those signatures that are present in each of the constituent types. Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional parameters and may differ in return types. When signatures differ in return types, the resulting return type is the union of the constituent return types.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L20947-L20975
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getApparentTypeOfTypeParameter
function getApparentTypeOfTypeParameter(type) { if (!type.resolvedApparentType) { var constraintType = getConstraintOfTypeParameter(type); while (constraintType && constraintType.flags & 16384 /* TypeParameter */) { constraintType = getConstraintOfTypeParameter(constraintType); } type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type); } return type.resolvedApparentType; }
javascript
function getApparentTypeOfTypeParameter(type) { if (!type.resolvedApparentType) { var constraintType = getConstraintOfTypeParameter(type); while (constraintType && constraintType.flags & 16384 /* TypeParameter */) { constraintType = getConstraintOfTypeParameter(constraintType); } type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type); } return type.resolvedApparentType; }
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The apparent type of a type parameter is the base constraint instantiated with the type parameter as the type argument for the 'this' type.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L21130-L21139
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getApparentType
function getApparentType(type) { if (type.flags & 16384 /* TypeParameter */) { type = getApparentTypeOfTypeParameter(type); } if (type.flags & 34 /* StringLike */) { type = globalStringType; } else if (type.flags & 340 /* NumberLike */) { type = globalNumberType; } else if (type.flags & 136 /* BooleanLike */) { type = globalBooleanType; } else if (type.flags & 512 /* ESSymbol */) { type = getGlobalESSymbolType(); } return type; }
javascript
function getApparentType(type) { if (type.flags & 16384 /* TypeParameter */) { type = getApparentTypeOfTypeParameter(type); } if (type.flags & 34 /* StringLike */) { type = globalStringType; } else if (type.flags & 340 /* NumberLike */) { type = globalNumberType; } else if (type.flags & 136 /* BooleanLike */) { type = globalBooleanType; } else if (type.flags & 512 /* ESSymbol */) { type = getGlobalESSymbolType(); } return type; }
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For a type parameter, return the base constraint of the type parameter. For the string, number, boolean, and symbol primitive types, return the corresponding object types. Otherwise return the type itself. Note that the apparent type of a union type is the union type itself.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L21145-L21162
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getPropagatingFlagsOfTypes
function getPropagatingFlagsOfTypes(types, excludeKinds) { var result = 0; for (var _i = 0, types_3 = types; _i < types_3.length; _i++) { var type = types_3[_i]; if (!(type.flags & excludeKinds)) { result |= type.flags; } } return result & 234881024 /* PropagatingFlags */; }
javascript
function getPropagatingFlagsOfTypes(types, excludeKinds) { var result = 0; for (var _i = 0, types_3 = types; _i < types_3.length; _i++) { var type = types_3[_i]; if (!(type.flags & excludeKinds)) { result |= type.flags; } } return result & 234881024 /* PropagatingFlags */; }
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This function is used to propagate certain flags when creating new object type references and union types. It is only necessary to do so if a constituent type might be the undefined type, the null type, the type of an object literal or the anyFunctionType. This is because there are operations in the type checker that care about the presence of such types at arbitrary depth in a containing type.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L21701-L21710
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getUnionTypeFromSortedList
function getUnionTypeFromSortedList(types, aliasSymbol, aliasTypeArguments) { if (types.length === 0) { return neverType; } if (types.length === 1) { return types[0]; } var id = getTypeListId(types); var type = unionTypes[id]; if (!type) { var propagatedFlags = getPropagatingFlagsOfTypes(types, /*excludeKinds*/ 6144 /* Nullable */); type = unionTypes[id] = createObjectType(524288 /* Union */ | propagatedFlags); type.types = types; type.aliasSymbol = aliasSymbol; type.aliasTypeArguments = aliasTypeArguments; } return type; }
javascript
function getUnionTypeFromSortedList(types, aliasSymbol, aliasTypeArguments) { if (types.length === 0) { return neverType; } if (types.length === 1) { return types[0]; } var id = getTypeListId(types); var type = unionTypes[id]; if (!type) { var propagatedFlags = getPropagatingFlagsOfTypes(types, /*excludeKinds*/ 6144 /* Nullable */); type = unionTypes[id] = createObjectType(524288 /* Union */ | propagatedFlags); type.types = types; type.aliasSymbol = aliasSymbol; type.aliasTypeArguments = aliasTypeArguments; } return type; }
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This function assumes the constituent type list is sorted and deduplicated.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L22118-L22135
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isKnownProperty
function isKnownProperty(type, name) { if (type.flags & 2588672 /* ObjectType */) { var resolved = resolveStructuredTypeMembers(type); if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) || resolved.stringIndexInfo || (resolved.numberIndexInfo && isNumericLiteralName(name)) || getPropertyOfType(type, name)) { return true; } } else if (type.flags & 1572864 /* UnionOrIntersection */) { for (var _i = 0, _a = type.types; _i < _a.length; _i++) { var t = _a[_i]; if (isKnownProperty(t, name)) { return true; } } } return false; }
javascript
function isKnownProperty(type, name) { if (type.flags & 2588672 /* ObjectType */) { var resolved = resolveStructuredTypeMembers(type); if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) || resolved.stringIndexInfo || (resolved.numberIndexInfo && isNumericLiteralName(name)) || getPropertyOfType(type, name)) { return true; } } else if (type.flags & 1572864 /* UnionOrIntersection */) { for (var _i = 0, _a = type.types; _i < _a.length; _i++) { var t = _a[_i]; if (isKnownProperty(t, name)) { return true; } } } return false; }
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Check if a property with the given name is known anywhere in the given type. In an object type, a property is considered known if the object type is empty and the check is for assignability, if the object type has index signatures, or if the property is actually declared in the object type. In a union or intersection type, a property is considered known if it is known in any constituent type.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L23089-L23108
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
objectTypeRelatedTo
function objectTypeRelatedTo(source, originalSource, target, reportErrors) { if (overflow) { return 0 /* False */; } var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id; var related = relation[id]; if (related !== undefined) { if (reportErrors && related === 2 /* Failed */) { // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported // failure and continue computing the relation such that errors get reported. relation[id] = 3 /* FailedAndReported */; } else { return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */; } } if (depth > 0) { for (var i = 0; i < depth; i++) { // If source and target are already being compared, consider them related with assumptions if (maybeStack[i][id]) { return 1 /* Maybe */; } } if (depth === 100) { overflow = true; return 0 /* False */; } } else { sourceStack = []; targetStack = []; maybeStack = []; expandingFlags = 0; } sourceStack[depth] = source; targetStack[depth] = target; maybeStack[depth] = ts.createMap(); maybeStack[depth][id] = 1 /* Succeeded */; depth++; var saveExpandingFlags = expandingFlags; if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth)) expandingFlags |= 1; if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth)) expandingFlags |= 2; var result; if (expandingFlags === 3) { result = 1 /* Maybe */; } else { result = propertiesRelatedTo(source, target, reportErrors); if (result) { result &= signaturesRelatedTo(source, target, 0 /* Call */, reportErrors); if (result) { result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportErrors); if (result) { result &= indexTypesRelatedTo(source, originalSource, target, 0 /* String */, reportErrors); if (result) { result &= indexTypesRelatedTo(source, originalSource, target, 1 /* Number */, reportErrors); } } } } } expandingFlags = saveExpandingFlags; depth--; if (result) { var maybeCache = maybeStack[depth]; // If result is definitely true, copy assumptions to global cache, else copy to next level up var destinationCache = (result === -1 /* True */ || depth === 0) ? relation : maybeStack[depth - 1]; ts.copyProperties(maybeCache, destinationCache); } else { // A false result goes straight into global cache (when something is false under assumptions it // will also be false without assumptions) relation[id] = reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */; } return result; }
javascript
function objectTypeRelatedTo(source, originalSource, target, reportErrors) { if (overflow) { return 0 /* False */; } var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id; var related = relation[id]; if (related !== undefined) { if (reportErrors && related === 2 /* Failed */) { // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported // failure and continue computing the relation such that errors get reported. relation[id] = 3 /* FailedAndReported */; } else { return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */; } } if (depth > 0) { for (var i = 0; i < depth; i++) { // If source and target are already being compared, consider them related with assumptions if (maybeStack[i][id]) { return 1 /* Maybe */; } } if (depth === 100) { overflow = true; return 0 /* False */; } } else { sourceStack = []; targetStack = []; maybeStack = []; expandingFlags = 0; } sourceStack[depth] = source; targetStack[depth] = target; maybeStack[depth] = ts.createMap(); maybeStack[depth][id] = 1 /* Succeeded */; depth++; var saveExpandingFlags = expandingFlags; if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth)) expandingFlags |= 1; if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth)) expandingFlags |= 2; var result; if (expandingFlags === 3) { result = 1 /* Maybe */; } else { result = propertiesRelatedTo(source, target, reportErrors); if (result) { result &= signaturesRelatedTo(source, target, 0 /* Call */, reportErrors); if (result) { result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportErrors); if (result) { result &= indexTypesRelatedTo(source, originalSource, target, 0 /* String */, reportErrors); if (result) { result &= indexTypesRelatedTo(source, originalSource, target, 1 /* Number */, reportErrors); } } } } } expandingFlags = saveExpandingFlags; depth--; if (result) { var maybeCache = maybeStack[depth]; // If result is definitely true, copy assumptions to global cache, else copy to next level up var destinationCache = (result === -1 /* True */ || depth === 0) ? relation : maybeStack[depth - 1]; ts.copyProperties(maybeCache, destinationCache); } else { // A false result goes straight into global cache (when something is false under assumptions it // will also be false without assumptions) relation[id] = reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */; } return result; }
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Determine if two object types are related by structure. First, check if the result is already available in the global cache. Second, check if we have already started a comparison of the given two types in which case we assume the result to be true. Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion and issue an error. Otherwise, actually compare the structure of the two types.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L23224-L23301
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
signatureRelatedTo
function signatureRelatedTo(source, target, reportErrors) { return compareSignaturesRelated(source, target, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo); }
javascript
function signatureRelatedTo(source, target, reportErrors) { return compareSignaturesRelated(source, target, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo); }
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See signatureAssignableTo, compareSignaturesIdentical
[ "See", "signatureAssignableTo", "compareSignaturesIdentical" ]
c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L23454-L23456
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isAbstractConstructorType
function isAbstractConstructorType(type) { if (type.flags & 2097152 /* Anonymous */) { var symbol = type.symbol; if (symbol && symbol.flags & 32 /* Class */) { var declaration = getClassLikeDeclarationOfSymbol(symbol); if (declaration && declaration.flags & 128 /* Abstract */) { return true; } } } return false; }
javascript
function isAbstractConstructorType(type) { if (type.flags & 2097152 /* Anonymous */) { var symbol = type.symbol; if (symbol && symbol.flags & 32 /* Class */) { var declaration = getClassLikeDeclarationOfSymbol(symbol); if (declaration && declaration.flags & 128 /* Abstract */) { return true; } } } return false; }
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Return true if the given type is the constructor type for an abstract class
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L23565-L23576
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isObjectLiteralType
function isObjectLiteralType(type) { return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */)) !== 0 && getSignaturesOfType(type, 0 /* Call */).length === 0 && getSignaturesOfType(type, 1 /* Construct */).length === 0; }
javascript
function isObjectLiteralType(type) { return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */)) !== 0 && getSignaturesOfType(type, 0 /* Call */).length === 0 && getSignaturesOfType(type, 1 /* Construct */).length === 0; }
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Return true if type was inferred from an object literal or written as an object type literal with no call or construct signatures.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L23838-L23842
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getRegularTypeOfObjectLiteral
function getRegularTypeOfObjectLiteral(type) { if (!(type.flags & 16777216 /* FreshObjectLiteral */)) { return type; } var regularType = type.regularType; if (regularType) { return regularType; } var resolved = type; var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral); var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo); regularNew.flags = resolved.flags & ~16777216 /* FreshObjectLiteral */; type.regularType = regularNew; return regularNew; }
javascript
function getRegularTypeOfObjectLiteral(type) { if (!(type.flags & 16777216 /* FreshObjectLiteral */)) { return type; } var regularType = type.regularType; if (regularType) { return regularType; } var resolved = type; var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral); var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo); regularNew.flags = resolved.flags & ~16777216 /* FreshObjectLiteral */; type.regularType = regularNew; return regularNew; }
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If the the provided object literal is subject to the excess properties check, create a new that is exempt. Recursively mark object literal members as exempt. Leave signatures alone since they are not subject to the check.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L23870-L23884
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
removeTypesFromUnionOrIntersection
function removeTypesFromUnionOrIntersection(type, typesToRemove) { var reducedTypes = []; for (var _i = 0, _a = type.types; _i < _a.length; _i++) { var t = _a[_i]; if (!typeIdenticalToSomeType(t, typesToRemove)) { reducedTypes.push(t); } } return type.flags & 524288 /* Union */ ? getUnionType(reducedTypes) : getIntersectionType(reducedTypes); }
javascript
function removeTypesFromUnionOrIntersection(type, typesToRemove) { var reducedTypes = []; for (var _i = 0, _a = type.types; _i < _a.length; _i++) { var t = _a[_i]; if (!typeIdenticalToSomeType(t, typesToRemove)) { reducedTypes.push(t); } } return type.flags & 524288 /* Union */ ? getUnionType(reducedTypes) : getIntersectionType(reducedTypes); }
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Return a new union or intersection type computed by removing a given set of types from a given union or intersection type.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L24264-L24273
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getResolvedSymbol
function getResolvedSymbol(node) { var links = getNodeLinks(node); if (!links.resolvedSymbol) { links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol; } return links.resolvedSymbol; }
javascript
function getResolvedSymbol(node) { var links = getNodeLinks(node); if (!links.resolvedSymbol) { links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol; } return links.resolvedSymbol; }
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EXPRESSION TYPE CHECKING
[ "EXPRESSION", "TYPE", "CHECKING" ]
c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L24324-L24330
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
containsMatchingReferenceDiscriminant
function containsMatchingReferenceDiscriminant(source, target) { return target.kind === 172 /* PropertyAccessExpression */ && containsMatchingReference(source, target.expression) && isDiscriminantProperty(getDeclaredTypeOfReference(target.expression), target.name.text); }
javascript
function containsMatchingReferenceDiscriminant(source, target) { return target.kind === 172 /* PropertyAccessExpression */ && containsMatchingReference(source, target.expression) && isDiscriminantProperty(getDeclaredTypeOfReference(target.expression), target.name.text); }
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Return true if target is a property access xxx.yyy, source is a property access xxx.zzz, the declared type of xxx is a union type, and yyy is a property that is possibly a discriminant. We consider a property a possible discriminant if its type differs in the constituents of containing union type, and if every choice is a unit type or a union of unit types.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L24405-L24409
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getAssignmentReducedType
function getAssignmentReducedType(declaredType, assignedType) { if (declaredType !== assignedType) { var reducedType = filterType(declaredType, function (t) { return typeMaybeAssignableTo(assignedType, t); }); if (reducedType !== neverType) { return reducedType; } } return declaredType; }
javascript
function getAssignmentReducedType(declaredType, assignedType) { if (declaredType !== assignedType) { var reducedType = filterType(declaredType, function (t) { return typeMaybeAssignableTo(assignedType, t); }); if (reducedType !== neverType) { return reducedType; } } return declaredType; }
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Remove those constituent types of declaredType to which no constituent type of assignedType is assignable. For example, when a variable of type number | string | boolean is assigned a value of type number | boolean, we remove type string.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L24483-L24491
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
narrowType
function narrowType(type, expr, assumeTrue) { switch (expr.kind) { case 69 /* Identifier */: case 97 /* ThisKeyword */: case 172 /* PropertyAccessExpression */: return narrowTypeByTruthiness(type, expr, assumeTrue); case 174 /* CallExpression */: return narrowTypeByTypePredicate(type, expr, assumeTrue); case 178 /* ParenthesizedExpression */: return narrowType(type, expr.expression, assumeTrue); case 187 /* BinaryExpression */: return narrowTypeByBinaryExpression(type, expr, assumeTrue); case 185 /* PrefixUnaryExpression */: if (expr.operator === 49 /* ExclamationToken */) { return narrowType(type, expr.operand, !assumeTrue); } break; } return type; }
javascript
function narrowType(type, expr, assumeTrue) { switch (expr.kind) { case 69 /* Identifier */: case 97 /* ThisKeyword */: case 172 /* PropertyAccessExpression */: return narrowTypeByTruthiness(type, expr, assumeTrue); case 174 /* CallExpression */: return narrowTypeByTypePredicate(type, expr, assumeTrue); case 178 /* ParenthesizedExpression */: return narrowType(type, expr.expression, assumeTrue); case 187 /* BinaryExpression */: return narrowTypeByBinaryExpression(type, expr, assumeTrue); case 185 /* PrefixUnaryExpression */: if (expr.operator === 49 /* ExclamationToken */) { return narrowType(type, expr.operand, !assumeTrue); } break; } return type; }
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Narrow the given type based on the given expression having the assumed boolean value. The returned type will be a subtype or the same type as the argument.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L25194-L25213
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isParameterAssigned
function isParameterAssigned(symbol) { var func = ts.getRootDeclaration(symbol.valueDeclaration).parent; var links = getNodeLinks(func); if (!(links.flags & 4194304 /* AssignmentsMarked */)) { links.flags |= 4194304 /* AssignmentsMarked */; if (!hasParentWithAssignmentsMarked(func)) { markParameterAssignments(func); } } return symbol.isAssigned || false; }
javascript
function isParameterAssigned(symbol) { var func = ts.getRootDeclaration(symbol.valueDeclaration).parent; var links = getNodeLinks(func); if (!(links.flags & 4194304 /* AssignmentsMarked */)) { links.flags |= 4194304 /* AssignmentsMarked */; if (!hasParentWithAssignmentsMarked(func)) { markParameterAssignments(func); } } return symbol.isAssigned || false; }
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Check if a parameter is assigned anywhere within its declaring function.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L25256-L25266
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getSuperCallInConstructor
function getSuperCallInConstructor(constructor) { var links = getNodeLinks(constructor); // Only trying to find super-call if we haven't yet tried to find one. Once we try, we will record the result if (links.hasSuperCall === undefined) { links.superCall = findFirstSuperCall(constructor.body); links.hasSuperCall = links.superCall ? true : false; } return links.superCall; }
javascript
function getSuperCallInConstructor(constructor) { var links = getNodeLinks(constructor); // Only trying to find super-call if we haven't yet tried to find one. Once we try, we will record the result if (links.hasSuperCall === undefined) { links.superCall = findFirstSuperCall(constructor.body); links.hasSuperCall = links.superCall ? true : false; } return links.superCall; }
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Return a cached result if super-statement is already found. Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor @param constructor constructor-function to look for super statement
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L25477-L25485
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
classDeclarationExtendsNull
function classDeclarationExtendsNull(classDecl) { var classSymbol = getSymbolOfNode(classDecl); var classInstanceType = getDeclaredTypeOfSymbol(classSymbol); var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType); return baseConstructorType === nullWideningType; }
javascript
function classDeclarationExtendsNull(classDecl) { var classSymbol = getSymbolOfNode(classDecl); var classInstanceType = getDeclaredTypeOfSymbol(classSymbol); var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType); return baseConstructorType === nullWideningType; }
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Check if the given class-declaration extends null then return true. Otherwise, return false @param classDecl a class declaration to check if it extends null
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L25491-L25496
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getContextuallyTypedParameterType
function getContextuallyTypedParameterType(parameter) { var func = parameter.parent; if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) { var iife = ts.getImmediatelyInvokedFunctionExpression(func); if (iife) { var indexOfParameter = ts.indexOf(func.parameters, parameter); if (iife.arguments && indexOfParameter < iife.arguments.length) { if (parameter.dotDotDotToken) { var restTypes = []; for (var i = indexOfParameter; i < iife.arguments.length; i++) { restTypes.push(getTypeOfExpression(iife.arguments[i])); } return createArrayType(getUnionType(restTypes)); } var links = getNodeLinks(iife); var cached = links.resolvedSignature; links.resolvedSignature = anySignature; var type = checkExpression(iife.arguments[indexOfParameter]); links.resolvedSignature = cached; return type; } } var contextualSignature = getContextualSignature(func); if (contextualSignature) { var funcHasRestParameters = ts.hasRestParameter(func); var len = func.parameters.length - (funcHasRestParameters ? 1 : 0); var indexOfParameter = ts.indexOf(func.parameters, parameter); if (indexOfParameter < len) { return getTypeAtPosition(contextualSignature, indexOfParameter); } // If last parameter is contextually rest parameter get its type if (funcHasRestParameters && indexOfParameter === (func.parameters.length - 1) && isRestParameterIndex(contextualSignature, func.parameters.length - 1)) { return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters)); } } } return undefined; }
javascript
function getContextuallyTypedParameterType(parameter) { var func = parameter.parent; if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) { var iife = ts.getImmediatelyInvokedFunctionExpression(func); if (iife) { var indexOfParameter = ts.indexOf(func.parameters, parameter); if (iife.arguments && indexOfParameter < iife.arguments.length) { if (parameter.dotDotDotToken) { var restTypes = []; for (var i = indexOfParameter; i < iife.arguments.length; i++) { restTypes.push(getTypeOfExpression(iife.arguments[i])); } return createArrayType(getUnionType(restTypes)); } var links = getNodeLinks(iife); var cached = links.resolvedSignature; links.resolvedSignature = anySignature; var type = checkExpression(iife.arguments[indexOfParameter]); links.resolvedSignature = cached; return type; } } var contextualSignature = getContextualSignature(func); if (contextualSignature) { var funcHasRestParameters = ts.hasRestParameter(func); var len = func.parameters.length - (funcHasRestParameters ? 1 : 0); var indexOfParameter = ts.indexOf(func.parameters, parameter); if (indexOfParameter < len) { return getTypeAtPosition(contextualSignature, indexOfParameter); } // If last parameter is contextually rest parameter get its type if (funcHasRestParameters && indexOfParameter === (func.parameters.length - 1) && isRestParameterIndex(contextualSignature, func.parameters.length - 1)) { return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters)); } } } return undefined; }
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Return contextual type of parameter or undefined if no contextual type is available
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L25800-L25839
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getContextualTypeForInitializerExpression
function getContextualTypeForInitializerExpression(node) { var declaration = node.parent; if (node === declaration.initializer) { if (declaration.type) { return getTypeFromTypeNode(declaration.type); } if (declaration.kind === 142 /* Parameter */) { var type = getContextuallyTypedParameterType(declaration); if (type) { return type; } } if (ts.isBindingPattern(declaration.name)) { return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true, /*reportErrors*/ false); } if (ts.isBindingPattern(declaration.parent)) { var parentDeclaration = declaration.parent.parent; var name_12 = declaration.propertyName || declaration.name; if (ts.isVariableLike(parentDeclaration) && parentDeclaration.type && !ts.isBindingPattern(name_12)) { var text = getTextOfPropertyName(name_12); if (text) { return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text); } } } } return undefined; }
javascript
function getContextualTypeForInitializerExpression(node) { var declaration = node.parent; if (node === declaration.initializer) { if (declaration.type) { return getTypeFromTypeNode(declaration.type); } if (declaration.kind === 142 /* Parameter */) { var type = getContextuallyTypedParameterType(declaration); if (type) { return type; } } if (ts.isBindingPattern(declaration.name)) { return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true, /*reportErrors*/ false); } if (ts.isBindingPattern(declaration.parent)) { var parentDeclaration = declaration.parent.parent; var name_12 = declaration.propertyName || declaration.name; if (ts.isVariableLike(parentDeclaration) && parentDeclaration.type && !ts.isBindingPattern(name_12)) { var text = getTextOfPropertyName(name_12); if (text) { return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text); } } } } return undefined; }
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In a variable, parameter or property declaration with a type annotation, the contextual type of an initializer expression is the type of the variable, parameter or property. Otherwise, in a parameter declaration of a contextually typed function expression, the contextual type of an initializer expression is the contextual type of the parameter. Otherwise, in a variable or parameter declaration with a binding pattern name, the contextual type of an initializer expression is the type implied by the binding pattern. Otherwise, in a binding pattern inside a variable or parameter declaration, the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L25848-L25877
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getContextualTypeForArgument
function getContextualTypeForArgument(callTarget, arg) { var args = getEffectiveCallArguments(callTarget); var argIndex = ts.indexOf(args, arg); if (argIndex >= 0) { var signature = getResolvedOrAnySignature(callTarget); return getTypeAtPosition(signature, argIndex); } return undefined; }
javascript
function getContextualTypeForArgument(callTarget, arg) { var args = getEffectiveCallArguments(callTarget); var argIndex = ts.indexOf(args, arg); if (argIndex >= 0) { var signature = getResolvedOrAnySignature(callTarget); return getTypeAtPosition(signature, argIndex); } return undefined; }
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In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L25930-L25938
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
contextualTypeIsTupleLikeType
function contextualTypeIsTupleLikeType(type) { return !!(type.flags & 524288 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type)); }
javascript
function contextualTypeIsTupleLikeType(type) { return !!(type.flags & 524288 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type)); }
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Return true if the given contextual type is a tuple-like type
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L26011-L26013
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getContextualSignature
function getContextualSignature(node) { ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node)); var type = getContextualTypeForFunctionLikeDeclaration(node); if (!type) { return undefined; } if (!(type.flags & 524288 /* Union */)) { return getNonGenericSignature(type); } var signatureList; var types = type.types; for (var _i = 0, types_12 = types; _i < types_12.length; _i++) { var current = types_12[_i]; var signature = getNonGenericSignature(current); if (signature) { if (!signatureList) { // This signature will contribute to contextual union signature signatureList = [signature]; } else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) { // Signatures aren't identical, do not use return undefined; } else { // Use this signature for contextual union signature signatureList.push(signature); } } } // Result is union of signatures collected (return type is union of return types of this signature set) var result; if (signatureList) { result = cloneSignature(signatureList[0]); // Clear resolved return type we possibly got from cloneSignature result.resolvedReturnType = undefined; result.unionSignatures = signatureList; } return result; }
javascript
function getContextualSignature(node) { ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node)); var type = getContextualTypeForFunctionLikeDeclaration(node); if (!type) { return undefined; } if (!(type.flags & 524288 /* Union */)) { return getNonGenericSignature(type); } var signatureList; var types = type.types; for (var _i = 0, types_12 = types; _i < types_12.length; _i++) { var current = types_12[_i]; var signature = getNonGenericSignature(current); if (signature) { if (!signatureList) { // This signature will contribute to contextual union signature signatureList = [signature]; } else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) { // Signatures aren't identical, do not use return undefined; } else { // Use this signature for contextual union signature signatureList.push(signature); } } } // Result is union of signatures collected (return type is union of return types of this signature set) var result; if (signatureList) { result = cloneSignature(signatureList[0]); // Clear resolved return type we possibly got from cloneSignature result.resolvedReturnType = undefined; result.unionSignatures = signatureList; } return result; }
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Return the contextual signature for a given expression node. A contextual type provides a contextual signature if it has a single call signature and if that call signature is non-generic. If the contextual type is a union type, get the signature from each type possible and if they are all identical ignoring their return type, the result is same signature but with return type as union type of return types from these signatures
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L26204-L26242
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isJsxIntrinsicIdentifier
function isJsxIntrinsicIdentifier(tagName) { // TODO (yuisu): comment if (tagName.kind === 172 /* PropertyAccessExpression */ || tagName.kind === 97 /* ThisKeyword */) { return false; } else { return ts.isIntrinsicJsxName(tagName.text); } }
javascript
function isJsxIntrinsicIdentifier(tagName) { // TODO (yuisu): comment if (tagName.kind === 172 /* PropertyAccessExpression */ || tagName.kind === 97 /* ThisKeyword */) { return false; } else { return ts.isIntrinsicJsxName(tagName.text); } }
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Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L26556-L26564
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
checkClassPropertyAccess
function checkClassPropertyAccess(node, left, type, prop) { var flags = getDeclarationFlagsFromSymbol(prop); var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop)); var errorNode = node.kind === 172 /* PropertyAccessExpression */ || node.kind === 218 /* VariableDeclaration */ ? node.name : node.right; if (left.kind === 95 /* SuperKeyword */) { // TS 1.0 spec (April 2014): 4.8.2 // - In a constructor, instance member function, instance member accessor, or // instance member variable initializer where this references a derived class instance, // a super property access is permitted and must specify a public instance member function of the base class. // - In a static member function or static member accessor // where this references the constructor function object of a derived class, // a super property access is permitted and must specify a public static member function of the base class. if (languageVersion < 2 /* ES6 */ && getDeclarationKindFromSymbol(prop) !== 147 /* MethodDeclaration */) { // `prop` refers to a *property* declared in the super class // rather than a *method*, so it does not satisfy the above criteria. error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword); return false; } if (flags & 128 /* Abstract */) { // A method cannot be accessed in a super property access if the method is abstract. // This error could mask a private property access error. But, a member // cannot simultaneously be private and abstract, so this will trigger an // additional error elsewhere. error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass)); return false; } } // Public properties are otherwise accessible. if (!(flags & (8 /* Private */ | 16 /* Protected */))) { return true; } // Property is known to be private or protected at this point // Private property is accessible if the property is within the declaring class if (flags & 8 /* Private */) { var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop)); if (!isNodeWithinClass(node, declaringClassDeclaration)) { error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass)); return false; } return true; } // Property is known to be protected at this point // All protected properties of a supertype are accessible in a super access if (left.kind === 95 /* SuperKeyword */) { return true; } // Get the enclosing class that has the declaring class as its base type var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) { var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration)); return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined; }); // A protected property is accessible if the property is within the declaring class or classes derived from it if (!enclosingClass) { error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass)); return false; } // No further restrictions for static properties if (flags & 32 /* Static */) { return true; } // An instance property must be accessed through an instance of the enclosing class if (type.flags & 268435456 /* ThisType */) { // get the original type -- represented as the type constraint of the 'this' type type = getConstraintOfTypeParameter(type); } // TODO: why is the first part of this check here? if (!(getTargetType(type).flags & (32768 /* Class */ | 65536 /* Interface */) && hasBaseType(type, enclosingClass))) { error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass)); return false; } return true; }
javascript
function checkClassPropertyAccess(node, left, type, prop) { var flags = getDeclarationFlagsFromSymbol(prop); var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop)); var errorNode = node.kind === 172 /* PropertyAccessExpression */ || node.kind === 218 /* VariableDeclaration */ ? node.name : node.right; if (left.kind === 95 /* SuperKeyword */) { // TS 1.0 spec (April 2014): 4.8.2 // - In a constructor, instance member function, instance member accessor, or // instance member variable initializer where this references a derived class instance, // a super property access is permitted and must specify a public instance member function of the base class. // - In a static member function or static member accessor // where this references the constructor function object of a derived class, // a super property access is permitted and must specify a public static member function of the base class. if (languageVersion < 2 /* ES6 */ && getDeclarationKindFromSymbol(prop) !== 147 /* MethodDeclaration */) { // `prop` refers to a *property* declared in the super class // rather than a *method*, so it does not satisfy the above criteria. error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword); return false; } if (flags & 128 /* Abstract */) { // A method cannot be accessed in a super property access if the method is abstract. // This error could mask a private property access error. But, a member // cannot simultaneously be private and abstract, so this will trigger an // additional error elsewhere. error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass)); return false; } } // Public properties are otherwise accessible. if (!(flags & (8 /* Private */ | 16 /* Protected */))) { return true; } // Property is known to be private or protected at this point // Private property is accessible if the property is within the declaring class if (flags & 8 /* Private */) { var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop)); if (!isNodeWithinClass(node, declaringClassDeclaration)) { error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass)); return false; } return true; } // Property is known to be protected at this point // All protected properties of a supertype are accessible in a super access if (left.kind === 95 /* SuperKeyword */) { return true; } // Get the enclosing class that has the declaring class as its base type var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) { var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration)); return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined; }); // A protected property is accessible if the property is within the declaring class or classes derived from it if (!enclosingClass) { error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass)); return false; } // No further restrictions for static properties if (flags & 32 /* Static */) { return true; } // An instance property must be accessed through an instance of the enclosing class if (type.flags & 268435456 /* ThisType */) { // get the original type -- represented as the type constraint of the 'this' type type = getConstraintOfTypeParameter(type); } // TODO: why is the first part of this check here? if (!(getTargetType(type).flags & (32768 /* Class */ | 65536 /* Interface */) && hasBaseType(type, enclosingClass))) { error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass)); return false; } return true; }
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Check whether the requested property access is valid. Returns true if node is a valid property access, and false otherwise. @param node The node to be checked. @param left The left hand side of the property access (e.g.: the super in `super.foo`). @param type The type of left. @param prop The symbol for the right hand side of the property access.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L26952-L27025
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getForInVariableSymbol
function getForInVariableSymbol(node) { var initializer = node.initializer; if (initializer.kind === 219 /* VariableDeclarationList */) { var variable = initializer.declarations[0]; if (variable && !ts.isBindingPattern(variable.name)) { return getSymbolOfNode(variable); } } else if (initializer.kind === 69 /* Identifier */) { return getResolvedSymbol(initializer); } return undefined; }
javascript
function getForInVariableSymbol(node) { var initializer = node.initializer; if (initializer.kind === 219 /* VariableDeclarationList */) { var variable = initializer.declarations[0]; if (variable && !ts.isBindingPattern(variable.name)) { return getSymbolOfNode(variable); } } else if (initializer.kind === 69 /* Identifier */) { return getResolvedSymbol(initializer); } return undefined; }
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Return the symbol of the for-in variable declared or referenced by the given for-in statement.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L27107-L27119
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getSingleCallSignature
function getSingleCallSignature(type) { if (type.flags & 2588672 /* ObjectType */) { var resolved = resolveStructuredTypeMembers(type); if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 && resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) { return resolved.callSignatures[0]; } } return undefined; }
javascript
function getSingleCallSignature(type) { if (type.flags & 2588672 /* ObjectType */) { var resolved = resolveStructuredTypeMembers(type); if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 && resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) { return resolved.callSignatures[0]; } } return undefined; }
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If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L27440-L27449
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getEffectiveDecoratorFirstArgumentType
function getEffectiveDecoratorFirstArgumentType(node) { // The first argument to a decorator is its `target`. if (node.kind === 221 /* ClassDeclaration */) { // For a class decorator, the `target` is the type of the class (e.g. the // "static" or "constructor" side of the class) var classSymbol = getSymbolOfNode(node); return getTypeOfSymbol(classSymbol); } if (node.kind === 142 /* Parameter */) { // For a parameter decorator, the `target` is the parent type of the // parameter's containing method. node = node.parent; if (node.kind === 148 /* Constructor */) { var classSymbol = getSymbolOfNode(node); return getTypeOfSymbol(classSymbol); } } if (node.kind === 145 /* PropertyDeclaration */ || node.kind === 147 /* MethodDeclaration */ || node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */) { // For a property or method decorator, the `target` is the // "static"-side type of the parent of the member if the member is // declared "static"; otherwise, it is the "instance"-side type of the // parent of the member. return getParentTypeOfClassElement(node); } ts.Debug.fail("Unsupported decorator target."); return unknownType; }
javascript
function getEffectiveDecoratorFirstArgumentType(node) { // The first argument to a decorator is its `target`. if (node.kind === 221 /* ClassDeclaration */) { // For a class decorator, the `target` is the type of the class (e.g. the // "static" or "constructor" side of the class) var classSymbol = getSymbolOfNode(node); return getTypeOfSymbol(classSymbol); } if (node.kind === 142 /* Parameter */) { // For a parameter decorator, the `target` is the parent type of the // parameter's containing method. node = node.parent; if (node.kind === 148 /* Constructor */) { var classSymbol = getSymbolOfNode(node); return getTypeOfSymbol(classSymbol); } } if (node.kind === 145 /* PropertyDeclaration */ || node.kind === 147 /* MethodDeclaration */ || node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */) { // For a property or method decorator, the `target` is the // "static"-side type of the parent of the member if the member is // declared "static"; otherwise, it is the "instance"-side type of the // parent of the member. return getParentTypeOfClassElement(node); } ts.Debug.fail("Unsupported decorator target."); return unknownType; }
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Returns the effective type of the first argument to a decorator. If 'node' is a class declaration or class expression, the effective argument type is the type of the static side of the class. If 'node' is a parameter declaration, the effective argument type is either the type of the static or instance side of the class for the parameter's parent method, depending on whether the method is declared static. For a constructor, the type is always the type of the static side of the class. If 'node' is a property, method, or accessor declaration, the effective argument type is the type of the static or instance side of the parent class for class element, depending on whether the element is declared static.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L27689-L27718
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getEffectiveArgumentType
function getEffectiveArgumentType(node, argIndex, arg) { // Decorators provide special arguments, a tagged template expression provides // a special first argument, and string literals get string literal types // unless we're reporting errors if (node.kind === 143 /* Decorator */) { return getEffectiveDecoratorArgumentType(node, argIndex); } else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) { return getGlobalTemplateStringsArrayType(); } // This is not a synthetic argument, so we return 'undefined' // to signal that the caller needs to check the argument. return undefined; }
javascript
function getEffectiveArgumentType(node, argIndex, arg) { // Decorators provide special arguments, a tagged template expression provides // a special first argument, and string literals get string literal types // unless we're reporting errors if (node.kind === 143 /* Decorator */) { return getEffectiveDecoratorArgumentType(node, argIndex); } else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) { return getGlobalTemplateStringsArrayType(); } // This is not a synthetic argument, so we return 'undefined' // to signal that the caller needs to check the argument. return undefined; }
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Gets the effective argument type for an argument in a call expression.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L27829-L27842
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getResolvedSignature
function getResolvedSignature(node, candidatesOutArray) { var links = getNodeLinks(node); // If getResolvedSignature has already been called, we will have cached the resolvedSignature. // However, it is possible that either candidatesOutArray was not passed in the first time, // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work // to correctly fill the candidatesOutArray. var cached = links.resolvedSignature; if (cached && cached !== resolvingSignature && !candidatesOutArray) { return cached; } links.resolvedSignature = resolvingSignature; var result = resolveSignature(node, candidatesOutArray); // If signature resolution originated in control flow type analysis (for example to compute the // assigned type in a flow assignment) we don't cache the result as it may be based on temporary // types from the control flow analysis. links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached; return result; }
javascript
function getResolvedSignature(node, candidatesOutArray) { var links = getNodeLinks(node); // If getResolvedSignature has already been called, we will have cached the resolvedSignature. // However, it is possible that either candidatesOutArray was not passed in the first time, // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work // to correctly fill the candidatesOutArray. var cached = links.resolvedSignature; if (cached && cached !== resolvingSignature && !candidatesOutArray) { return cached; } links.resolvedSignature = resolvingSignature; var result = resolveSignature(node, candidatesOutArray); // If signature resolution originated in control flow type analysis (for example to compute the // assigned type in a flow assignment) we don't cache the result as it may be based on temporary // types from the control flow analysis. links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached; return result; }
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candidatesOutArray is passed by signature help in the language service, and collectCandidates must fill it up with the appropriate candidate signatures
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L28337-L28354
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
checkCallExpression
function checkCallExpression(node) { // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments); var signature = getResolvedSignature(node); if (node.expression.kind === 95 /* SuperKeyword */) { return voidType; } if (node.kind === 175 /* NewExpression */) { var declaration = signature.declaration; if (declaration && declaration.kind !== 148 /* Constructor */ && declaration.kind !== 152 /* ConstructSignature */ && declaration.kind !== 157 /* ConstructorType */ && !ts.isJSDocConstructSignature(declaration)) { // When resolved signature is a call signature (and not a construct signature) the result type is any, unless // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations // in a JS file // Note:JS inferred classes might come from a variable declaration instead of a function declaration. // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration. var funcSymbol = node.expression.kind === 69 /* Identifier */ ? getResolvedSymbol(node.expression) : checkExpression(node.expression).symbol; if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16 /* Function */ || ts.isDeclarationOfFunctionExpression(funcSymbol))) { return getInferredClassType(funcSymbol); } else if (compilerOptions.noImplicitAny) { error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type); } return anyType; } } // In JavaScript files, calls to any identifier 'require' are treated as external module imports if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) { return resolveExternalModuleTypeByLiteral(node.arguments[0]); } return getReturnTypeOfSignature(signature); }
javascript
function checkCallExpression(node) { // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments); var signature = getResolvedSignature(node); if (node.expression.kind === 95 /* SuperKeyword */) { return voidType; } if (node.kind === 175 /* NewExpression */) { var declaration = signature.declaration; if (declaration && declaration.kind !== 148 /* Constructor */ && declaration.kind !== 152 /* ConstructSignature */ && declaration.kind !== 157 /* ConstructorType */ && !ts.isJSDocConstructSignature(declaration)) { // When resolved signature is a call signature (and not a construct signature) the result type is any, unless // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations // in a JS file // Note:JS inferred classes might come from a variable declaration instead of a function declaration. // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration. var funcSymbol = node.expression.kind === 69 /* Identifier */ ? getResolvedSymbol(node.expression) : checkExpression(node.expression).symbol; if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16 /* Function */ || ts.isDeclarationOfFunctionExpression(funcSymbol))) { return getInferredClassType(funcSymbol); } else if (compilerOptions.noImplicitAny) { error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type); } return anyType; } } // In JavaScript files, calls to any identifier 'require' are treated as external module imports if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) { return resolveExternalModuleTypeByLiteral(node.arguments[0]); } return getReturnTypeOfSignature(signature); }
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Syntactically and semantically checks a call or new expression. @param node The call/new expression to be checked. @returns On success, the expression's signature's return type. On failure, anyType.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L28372-L28408
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
maybeTypeOfKind
function maybeTypeOfKind(type, kind) { if (type.flags & kind) { return true; } if (type.flags & 1572864 /* UnionOrIntersection */) { var types = type.types; for (var _i = 0, types_13 = types; _i < types_13.length; _i++) { var t = types_13[_i]; if (maybeTypeOfKind(t, kind)) { return true; } } } return false; }
javascript
function maybeTypeOfKind(type, kind) { if (type.flags & kind) { return true; } if (type.flags & 1572864 /* UnionOrIntersection */) { var types = type.types; for (var _i = 0, types_13 = types; _i < types_13.length; _i++) { var t = types_13[_i]; if (maybeTypeOfKind(t, kind)) { return true; } } } return false; }
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Return true if type might be of the given kind. A union or intersection type might be of a given kind if at least one constituent type is of the given kind.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L28986-L29000
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isTypeOfKind
function isTypeOfKind(type, kind) { if (type.flags & kind) { return true; } if (type.flags & 524288 /* Union */) { var types = type.types; for (var _i = 0, types_14 = types; _i < types_14.length; _i++) { var t = types_14[_i]; if (!isTypeOfKind(t, kind)) { return false; } } return true; } if (type.flags & 1048576 /* Intersection */) { var types = type.types; for (var _a = 0, types_15 = types; _a < types_15.length; _a++) { var t = types_15[_a]; if (isTypeOfKind(t, kind)) { return true; } } } return false; }
javascript
function isTypeOfKind(type, kind) { if (type.flags & kind) { return true; } if (type.flags & 524288 /* Union */) { var types = type.types; for (var _i = 0, types_14 = types; _i < types_14.length; _i++) { var t = types_14[_i]; if (!isTypeOfKind(t, kind)) { return false; } } return true; } if (type.flags & 1048576 /* Intersection */) { var types = type.types; for (var _a = 0, types_15 = types; _a < types_15.length; _a++) { var t = types_15[_a]; if (isTypeOfKind(t, kind)) { return true; } } } return false; }
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Return true if type is of the given kind. A union type is of a given kind if all constituent types are of the given kind. An intersection type is of a given kind if at least one constituent type is of the given kind.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L29004-L29028
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
checkForDisallowedESSymbolOperand
function checkForDisallowedESSymbolOperand(operator) { var offendingSymbolOperand = maybeTypeOfKind(leftType, 512 /* ESSymbol */) ? left : maybeTypeOfKind(rightType, 512 /* ESSymbol */) ? right : undefined; if (offendingSymbolOperand) { error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator)); return false; } return true; }
javascript
function checkForDisallowedESSymbolOperand(operator) { var offendingSymbolOperand = maybeTypeOfKind(leftType, 512 /* ESSymbol */) ? left : maybeTypeOfKind(rightType, 512 /* ESSymbol */) ? right : undefined; if (offendingSymbolOperand) { error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator)); return false; } return true; }
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Return true if there was no error, false if there was an error.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L29350-L29359
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
checkTypeParameter
function checkTypeParameter(node) { // Grammar Checking if (node.expression) { grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected); } checkSourceElement(node.constraint); getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node))); if (produceDiagnostics) { checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0); } }
javascript
function checkTypeParameter(node) { // Grammar Checking if (node.expression) { grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected); } checkSourceElement(node.constraint); getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node))); if (produceDiagnostics) { checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0); } }
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DECLARATION AND STATEMENT TYPE CHECKING
[ "DECLARATION", "AND", "STATEMENT", "TYPE", "CHECKING" ]
c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L29690-L29700
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getPromisedType
function getPromisedType(promise) { // // { // promise // then( // thenFunction // onfulfilled: ( // onfulfilledParameterType // value: T // valueParameterType // ) => any // ): any; // } // if (isTypeAny(promise)) { return undefined; } if (promise.flags & 131072 /* Reference */) { if (promise.target === tryGetGlobalPromiseType() || promise.target === getGlobalPromiseLikeType()) { return promise.typeArguments[0]; } } var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType(); if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) { return undefined; } var thenFunction = getTypeOfPropertyOfType(promise, "then"); if (!thenFunction || isTypeAny(thenFunction)) { return undefined; } var thenSignatures = getSignaturesOfType(thenFunction, 0 /* Call */); if (thenSignatures.length === 0) { return undefined; } var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072 /* NEUndefined */); if (isTypeAny(onfulfilledParameterType)) { return undefined; } var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */); if (onfulfilledParameterSignatures.length === 0) { return undefined; } return getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), /*subtypeReduction*/ true); }
javascript
function getPromisedType(promise) { // // { // promise // then( // thenFunction // onfulfilled: ( // onfulfilledParameterType // value: T // valueParameterType // ) => any // ): any; // } // if (isTypeAny(promise)) { return undefined; } if (promise.flags & 131072 /* Reference */) { if (promise.target === tryGetGlobalPromiseType() || promise.target === getGlobalPromiseLikeType()) { return promise.typeArguments[0]; } } var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType(); if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) { return undefined; } var thenFunction = getTypeOfPropertyOfType(promise, "then"); if (!thenFunction || isTypeAny(thenFunction)) { return undefined; } var thenSignatures = getSignaturesOfType(thenFunction, 0 /* Call */); if (thenSignatures.length === 0) { return undefined; } var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072 /* NEUndefined */); if (isTypeAny(onfulfilledParameterType)) { return undefined; } var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */); if (onfulfilledParameterSignatures.length === 0) { return undefined; } return getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), /*subtypeReduction*/ true); }
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Gets the "promised type" of a promise. @param type The type of the promise. @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L30538-L30578
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
checkAsyncFunctionReturnType
function checkAsyncFunctionReturnType(node) { if (languageVersion >= 2 /* ES6 */) { var returnType = getTypeFromTypeNode(node.type); return checkCorrectPromiseType(returnType, node.type); } var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType(); if (globalPromiseConstructorLikeType === emptyObjectType) { // If we couldn't resolve the global PromiseConstructorLike type we cannot verify // compatibility with __awaiter. return unknownType; } // As part of our emit for an async function, we will need to emit the entity name of // the return type annotation as an expression. To meet the necessary runtime semantics // for __awaiter, we must also check that the type of the declaration (e.g. the static // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`. // // An example might be (from lib.es6.d.ts): // // interface Promise<T> { ... } // interface PromiseConstructor { // new <T>(...): Promise<T>; // } // declare var Promise: PromiseConstructor; // // When an async function declares a return type annotation of `Promise<T>`, we // need to get the type of the `Promise` variable declaration above, which would // be `PromiseConstructor`. // // The same case applies to a class: // // declare class Promise<T> { // constructor(...); // then<U>(...): Promise<U>; // } // // When we get the type of the `Promise` symbol here, we get the type of the static // side of the `Promise` class, which would be `{ new <T>(...): Promise<T> }`. var promiseType = getTypeFromTypeNode(node.type); if (promiseType === unknownType && compilerOptions.isolatedModules) { // If we are compiling with isolatedModules, we may not be able to resolve the // type as a value. As such, we will just return unknownType; return unknownType; } var promiseConstructor = getNodeLinks(node.type).resolvedSymbol; if (!promiseConstructor || !symbolIsValue(promiseConstructor)) { var typeName = promiseConstructor ? symbolToString(promiseConstructor) : typeToString(promiseType); error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName); return unknownType; } // If the Promise constructor, resolved locally, is an alias symbol we should mark it as referenced. checkReturnTypeAnnotationAsExpression(node); // Validate the promise constructor type. var promiseConstructorType = getTypeOfSymbol(promiseConstructor); if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) { return unknownType; } // Verify there is no local declaration that could collide with the promise constructor. var promiseName = ts.getEntityNameFromTypeNode(node.type); var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName); var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455 /* Value */); if (rootSymbol) { error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor)); return unknownType; } // Get and return the awaited type of the return type. return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type); }
javascript
function checkAsyncFunctionReturnType(node) { if (languageVersion >= 2 /* ES6 */) { var returnType = getTypeFromTypeNode(node.type); return checkCorrectPromiseType(returnType, node.type); } var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType(); if (globalPromiseConstructorLikeType === emptyObjectType) { // If we couldn't resolve the global PromiseConstructorLike type we cannot verify // compatibility with __awaiter. return unknownType; } // As part of our emit for an async function, we will need to emit the entity name of // the return type annotation as an expression. To meet the necessary runtime semantics // for __awaiter, we must also check that the type of the declaration (e.g. the static // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`. // // An example might be (from lib.es6.d.ts): // // interface Promise<T> { ... } // interface PromiseConstructor { // new <T>(...): Promise<T>; // } // declare var Promise: PromiseConstructor; // // When an async function declares a return type annotation of `Promise<T>`, we // need to get the type of the `Promise` variable declaration above, which would // be `PromiseConstructor`. // // The same case applies to a class: // // declare class Promise<T> { // constructor(...); // then<U>(...): Promise<U>; // } // // When we get the type of the `Promise` symbol here, we get the type of the static // side of the `Promise` class, which would be `{ new <T>(...): Promise<T> }`. var promiseType = getTypeFromTypeNode(node.type); if (promiseType === unknownType && compilerOptions.isolatedModules) { // If we are compiling with isolatedModules, we may not be able to resolve the // type as a value. As such, we will just return unknownType; return unknownType; } var promiseConstructor = getNodeLinks(node.type).resolvedSymbol; if (!promiseConstructor || !symbolIsValue(promiseConstructor)) { var typeName = promiseConstructor ? symbolToString(promiseConstructor) : typeToString(promiseType); error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName); return unknownType; } // If the Promise constructor, resolved locally, is an alias symbol we should mark it as referenced. checkReturnTypeAnnotationAsExpression(node); // Validate the promise constructor type. var promiseConstructorType = getTypeOfSymbol(promiseConstructor); if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) { return unknownType; } // Verify there is no local declaration that could collide with the promise constructor. var promiseName = ts.getEntityNameFromTypeNode(node.type); var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName); var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455 /* Value */); if (rootSymbol) { error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor)); return unknownType; } // Get and return the awaited type of the return type. return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type); }
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Checks the return type of an async function to ensure it is a compatible Promise implementation. @param node The signature to check @param returnType The return type for the function @remarks This checks that an async function has a valid Promise-compatible return type, and returns the *awaited type* of the promise. An async function has a valid Promise-compatible return type if the resolved value of the return type has a construct signature that takes in an `initializer` function that in turn supplies a `resolve` function as one of its arguments and results in an object with a callable `then` signature.
[ "Checks", "the", "return", "type", "of", "an", "async", "function", "to", "ensure", "it", "is", "a", "compatible", "Promise", "implementation", "." ]
c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L30713-L30781
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
checkDecorators
function checkDecorators(node) { if (!node.decorators) { return; } // skip this check for nodes that cannot have decorators. These should have already had an error reported by // checkGrammarDecorators. if (!ts.nodeCanBeDecorated(node)) { return; } if (!compilerOptions.experimentalDecorators) { error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning); } if (compilerOptions.emitDecoratorMetadata) { // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator. switch (node.kind) { case 221 /* ClassDeclaration */: var constructor = ts.getFirstConstructorWithBody(node); if (constructor) { checkParameterTypeAnnotationsAsExpressions(constructor); } break; case 147 /* MethodDeclaration */: case 149 /* GetAccessor */: case 150 /* SetAccessor */: checkParameterTypeAnnotationsAsExpressions(node); checkReturnTypeAnnotationAsExpression(node); break; case 145 /* PropertyDeclaration */: case 142 /* Parameter */: checkTypeAnnotationAsExpression(node); break; } } ts.forEach(node.decorators, checkDecorator); }
javascript
function checkDecorators(node) { if (!node.decorators) { return; } // skip this check for nodes that cannot have decorators. These should have already had an error reported by // checkGrammarDecorators. if (!ts.nodeCanBeDecorated(node)) { return; } if (!compilerOptions.experimentalDecorators) { error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning); } if (compilerOptions.emitDecoratorMetadata) { // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator. switch (node.kind) { case 221 /* ClassDeclaration */: var constructor = ts.getFirstConstructorWithBody(node); if (constructor) { checkParameterTypeAnnotationsAsExpressions(constructor); } break; case 147 /* MethodDeclaration */: case 149 /* GetAccessor */: case 150 /* SetAccessor */: checkParameterTypeAnnotationsAsExpressions(node); checkReturnTypeAnnotationAsExpression(node); break; case 145 /* PropertyDeclaration */: case 142 /* Parameter */: checkTypeAnnotationAsExpression(node); break; } } ts.forEach(node.decorators, checkDecorator); }
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Check the decorators of a node
[ "Check", "the", "decorators", "of", "a", "node" ]
c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L30855-L30889
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
checkParameterInitializer
function checkParameterInitializer(node) { if (ts.getRootDeclaration(node).kind !== 142 /* Parameter */) { return; } var func = ts.getContainingFunction(node); visit(node.initializer); function visit(n) { if (ts.isTypeNode(n) || ts.isDeclarationName(n)) { // do not dive in types // skip declaration names (i.e. in object literal expressions) return; } if (n.kind === 172 /* PropertyAccessExpression */) { // skip property names in property access expression return visit(n.expression); } else if (n.kind === 69 /* Identifier */) { // check FunctionLikeDeclaration.locals (stores parameters\function local variable) // if it contains entry with a specified name var symbol = resolveName(n, n.text, 107455 /* Value */ | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined); if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) { return; } if (symbol.valueDeclaration === node) { error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name)); return; } // locals map for function contain both parameters and function locals // so we need to do a bit of extra work to check if reference is legal var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration); if (enclosingContainer === func) { if (symbol.valueDeclaration.kind === 142 /* Parameter */) { // it is ok to reference parameter in initializer if either // - parameter is located strictly on the left of current parameter declaration if (symbol.valueDeclaration.pos < node.pos) { return; } // - parameter is wrapped in function-like entity var current = n; while (current !== node.initializer) { if (ts.isFunctionLike(current.parent)) { return; } // computed property names/initializers in instance property declaration of class like entities // are executed in constructor and thus deferred if (current.parent.kind === 145 /* PropertyDeclaration */ && !(current.parent.flags & 32 /* Static */) && ts.isClassLike(current.parent.parent)) { return; } current = current.parent; } } error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n)); } } else { return ts.forEachChild(n, visit); } } }
javascript
function checkParameterInitializer(node) { if (ts.getRootDeclaration(node).kind !== 142 /* Parameter */) { return; } var func = ts.getContainingFunction(node); visit(node.initializer); function visit(n) { if (ts.isTypeNode(n) || ts.isDeclarationName(n)) { // do not dive in types // skip declaration names (i.e. in object literal expressions) return; } if (n.kind === 172 /* PropertyAccessExpression */) { // skip property names in property access expression return visit(n.expression); } else if (n.kind === 69 /* Identifier */) { // check FunctionLikeDeclaration.locals (stores parameters\function local variable) // if it contains entry with a specified name var symbol = resolveName(n, n.text, 107455 /* Value */ | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined); if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) { return; } if (symbol.valueDeclaration === node) { error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name)); return; } // locals map for function contain both parameters and function locals // so we need to do a bit of extra work to check if reference is legal var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration); if (enclosingContainer === func) { if (symbol.valueDeclaration.kind === 142 /* Parameter */) { // it is ok to reference parameter in initializer if either // - parameter is located strictly on the left of current parameter declaration if (symbol.valueDeclaration.pos < node.pos) { return; } // - parameter is wrapped in function-like entity var current = n; while (current !== node.initializer) { if (ts.isFunctionLike(current.parent)) { return; } // computed property names/initializers in instance property declaration of class like entities // are executed in constructor and thus deferred if (current.parent.kind === 145 /* PropertyDeclaration */ && !(current.parent.flags & 32 /* Static */) && ts.isClassLike(current.parent.parent)) { return; } current = current.parent; } } error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n)); } } else { return ts.forEachChild(n, visit); } } }
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Check that a parameter initializer contains no references to parameters declared to the right of itself
[ "Check", "that", "a", "parameter", "initializer", "contains", "no", "references", "to", "parameters", "declared", "to", "the", "right", "of", "itself" ]
c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L31277-L31337
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
checkTypeParameterListsIdentical
function checkTypeParameterListsIdentical(node, symbol) { if (symbol.declarations.length === 1) { return; } var firstDecl; for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) { var declaration = _a[_i]; if (declaration.kind === 221 /* ClassDeclaration */ || declaration.kind === 222 /* InterfaceDeclaration */) { if (!firstDecl) { firstDecl = declaration; } else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) { error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text); } } } }
javascript
function checkTypeParameterListsIdentical(node, symbol) { if (symbol.declarations.length === 1) { return; } var firstDecl; for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) { var declaration = _a[_i]; if (declaration.kind === 221 /* ClassDeclaration */ || declaration.kind === 222 /* InterfaceDeclaration */) { if (!firstDecl) { firstDecl = declaration; } else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) { error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text); } } } }
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Check that type parameter lists are identical across multiple declarations
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L32095-L32111
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
checkSourceFileWorker
function checkSourceFileWorker(node) { var links = getNodeLinks(node); if (!(links.flags & 1 /* TypeChecked */)) { // If skipLibCheck is enabled, skip type checking if file is a declaration file. // If skipDefaultLibCheck is enabled, skip type checking if file contains a // '/// <reference no-default-lib="true"/>' directive. if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) { return; } // Grammar checking checkGrammarSourceFile(node); potentialThisCollisions.length = 0; deferredNodes = []; deferredUnusedIdentifierNodes = produceDiagnostics && noUnusedIdentifiers ? [] : undefined; ts.forEach(node.statements, checkSourceElement); checkDeferredNodes(); if (ts.isExternalModule(node)) { registerForUnusedIdentifiersCheck(node); } if (!node.isDeclarationFile) { checkUnusedIdentifiers(); } deferredNodes = undefined; deferredUnusedIdentifierNodes = undefined; if (ts.isExternalOrCommonJsModule(node)) { checkExternalModuleExports(node); } if (potentialThisCollisions.length) { ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope); potentialThisCollisions.length = 0; } links.flags |= 1 /* TypeChecked */; } }
javascript
function checkSourceFileWorker(node) { var links = getNodeLinks(node); if (!(links.flags & 1 /* TypeChecked */)) { // If skipLibCheck is enabled, skip type checking if file is a declaration file. // If skipDefaultLibCheck is enabled, skip type checking if file contains a // '/// <reference no-default-lib="true"/>' directive. if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) { return; } // Grammar checking checkGrammarSourceFile(node); potentialThisCollisions.length = 0; deferredNodes = []; deferredUnusedIdentifierNodes = produceDiagnostics && noUnusedIdentifiers ? [] : undefined; ts.forEach(node.statements, checkSourceElement); checkDeferredNodes(); if (ts.isExternalModule(node)) { registerForUnusedIdentifiersCheck(node); } if (!node.isDeclarationFile) { checkUnusedIdentifiers(); } deferredNodes = undefined; deferredUnusedIdentifierNodes = undefined; if (ts.isExternalOrCommonJsModule(node)) { checkExternalModuleExports(node); } if (potentialThisCollisions.length) { ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope); potentialThisCollisions.length = 0; } links.flags |= 1 /* TypeChecked */; } }
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Fully type check a source file and collect the relevant diagnostics.
[ "Fully", "type", "check", "a", "source", "file", "and", "collect", "the", "relevant", "diagnostics", "." ]
c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L33250-L33283
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isInsideWithStatementBody
function isInsideWithStatementBody(node) { if (node) { while (node.parent) { if (node.parent.kind === 212 /* WithStatement */ && node.parent.statement === node) { return true; } node = node.parent; } } return false; }
javascript
function isInsideWithStatementBody(node) { if (node) { while (node.parent) { if (node.parent.kind === 212 /* WithStatement */ && node.parent.statement === node) { return true; } node = node.parent; } } return false; }
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Language service support
[ "Language", "service", "support" ]
c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L33315-L33325
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
copySymbol
function copySymbol(symbol, meaning) { if (symbol.flags & meaning) { var id = symbol.name; // We will copy all symbol regardless of its reserved name because // symbolsToArray will check whether the key is a reserved name and // it will not copy symbol with reserved name to the array if (!symbols[id]) { symbols[id] = symbol; } } }
javascript
function copySymbol(symbol, meaning) { if (symbol.flags & meaning) { var id = symbol.name; // We will copy all symbol regardless of its reserved name because // symbolsToArray will check whether the key is a reserved name and // it will not copy symbol with reserved name to the array if (!symbols[id]) { symbols[id] = symbol; } } }
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Copy the given symbol into symbol tables if the symbol has the given meaning and it doesn't already existed in the symbol table @param key a key for storing in symbol table; if undefined, use symbol.name @param symbol the symbol to be added into symbol table @param meaning meaning of symbol to filter by before adding to symbol table
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L33390-L33400
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isTypeReferenceIdentifier
function isTypeReferenceIdentifier(entityName) { var node = entityName; while (node.parent && node.parent.kind === 139 /* QualifiedName */) { node = node.parent; } return node.parent && (node.parent.kind === 155 /* TypeReference */ || node.parent.kind === 267 /* JSDocTypeReference */); }
javascript
function isTypeReferenceIdentifier(entityName) { var node = entityName; while (node.parent && node.parent.kind === 139 /* QualifiedName */) { node = node.parent; } return node.parent && (node.parent.kind === 155 /* TypeReference */ || node.parent.kind === 267 /* JSDocTypeReference */); }
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True if the given identifier is part of a type reference
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L33426-L33432
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getExportSpecifierLocalTargetSymbol
function getExportSpecifierLocalTargetSymbol(node) { return node.parent.parent.moduleSpecifier ? getExternalModuleMember(node.parent.parent, node) : resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */); }
javascript
function getExportSpecifierLocalTargetSymbol(node) { return node.parent.parent.moduleSpecifier ? getExternalModuleMember(node.parent.parent, node) : resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */); }
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Returns the target of an export specifier without following aliases
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L33645-L33649
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getReferencedDeclarationWithCollidingName
function getReferencedDeclarationWithCollidingName(node) { var symbol = getReferencedValueSymbol(node); return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined; }
javascript
function getReferencedDeclarationWithCollidingName(node) { var symbol = getReferencedValueSymbol(node); return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined; }
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When resolved as an expression identifier, if the given node references a nested block scoped entity with a name that either hides an existing name or might hide it when compiled downlevel, return the declaration of that entity. Otherwise, return undefined.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L33902-L33905
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
encodeLastRecordedSourceMapSpan
function encodeLastRecordedSourceMapSpan() { if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) { return; } var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn; // Line/Comma delimiters if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) { // Emit comma to separate the entry if (sourceMapData.sourceMapMappings) { sourceMapData.sourceMapMappings += ","; } } else { // Emit line delimiters for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) { sourceMapData.sourceMapMappings += ";"; } prevEncodedEmittedColumn = 1; } // 1. Relative Column 0 based sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn); // 2. Relative sourceIndex sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex); // 3. Relative sourceLine 0 based sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine); // 4. Relative sourceColumn 0 based sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn); // 5. Relative namePosition 0 based if (lastRecordedSourceMapSpan.nameIndex >= 0) { ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this"); sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex); lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex; } lastEncodedSourceMapSpan = lastRecordedSourceMapSpan; sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan); }
javascript
function encodeLastRecordedSourceMapSpan() { if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) { return; } var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn; // Line/Comma delimiters if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) { // Emit comma to separate the entry if (sourceMapData.sourceMapMappings) { sourceMapData.sourceMapMappings += ","; } } else { // Emit line delimiters for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) { sourceMapData.sourceMapMappings += ";"; } prevEncodedEmittedColumn = 1; } // 1. Relative Column 0 based sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn); // 2. Relative sourceIndex sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex); // 3. Relative sourceLine 0 based sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine); // 4. Relative sourceColumn 0 based sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn); // 5. Relative namePosition 0 based if (lastRecordedSourceMapSpan.nameIndex >= 0) { ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this"); sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex); lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex; } lastEncodedSourceMapSpan = lastRecordedSourceMapSpan; sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan); }
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Encoding for sourcemap span
[ "Encoding", "for", "sourcemap", "span" ]
c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L35513-L35548
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getExportDefaultTempVariableName
function getExportDefaultTempVariableName() { var baseName = "_default"; if (!(baseName in currentIdentifiers)) { return baseName; } var count = 0; while (true) { count++; var name_23 = baseName + "_" + count; if (!(name_23 in currentIdentifiers)) { return name_23; } } }
javascript
function getExportDefaultTempVariableName() { var baseName = "_default"; if (!(baseName in currentIdentifiers)) { return baseName; } var count = 0; while (true) { count++; var name_23 = baseName + "_" + count; if (!(name_23 in currentIdentifiers)) { return name_23; } } }
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Return a temp variable name to be used in `export default` statements. The temp name will be of the form _default_counter. Note that export default is only allowed at most once in a module, so we do not need to keep track of created temp names.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L36132-L36145
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
writeReferencePath
function writeReferencePath(referencedFile, addBundledFileReference, emitOnlyDtsFiles) { var declFileName; var addedBundledEmitReference = false; if (ts.isDeclarationFile(referencedFile)) { // Declaration file, use declaration file name declFileName = referencedFile.fileName; } else { // Get the declaration file path ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile, emitOnlyDtsFiles); } if (declFileName) { declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, /*isAbsolutePathAnUrl*/ false); referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine; } return addedBundledEmitReference; function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) { // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path if (isBundledEmit && !addBundledFileReference) { return; } ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files"); declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath; addedBundledEmitReference = isBundledEmit; } }
javascript
function writeReferencePath(referencedFile, addBundledFileReference, emitOnlyDtsFiles) { var declFileName; var addedBundledEmitReference = false; if (ts.isDeclarationFile(referencedFile)) { // Declaration file, use declaration file name declFileName = referencedFile.fileName; } else { // Get the declaration file path ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile, emitOnlyDtsFiles); } if (declFileName) { declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, /*isAbsolutePathAnUrl*/ false); referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine; } return addedBundledEmitReference; function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) { // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path if (isBundledEmit && !addBundledFileReference) { return; } ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files"); declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath; addedBundledEmitReference = isBundledEmit; } }
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Adds the reference to referenced file, returns true if global file reference was emitted @param referencedFile @param addBundledFileReference Determines if global file reference corresponding to bundled file should be emitted or not
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L37219-L37245
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
emitFiles
function emitFiles(resolver, host, targetSourceFile, emitOnlyDtsFiles) { // emit output for the __extends helper function var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n function __() { this.constructor = d; }\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};"; var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n for (var s, i = 1, n = arguments.length; i < n; i++) {\n s = arguments[i];\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n t[p] = s[p];\n }\n return t;\n};"; // emit output for the __decorate helper function var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n return c > 3 && r && Object.defineProperty(target, key, r), r;\n};"; // emit output for the __metadata helper function var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};"; // emit output for the __param helper function var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n return function (target, key) { decorator(target, key, paramIndex); }\n};"; var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n step((generator = generator.apply(thisArg, _arguments)).next());\n });\n};"; var compilerOptions = host.getCompilerOptions(); var languageVersion = ts.getEmitScriptTarget(compilerOptions); var modulekind = ts.getEmitModuleKind(compilerOptions); var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined; var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined; var emitterDiagnostics = ts.createDiagnosticCollection(); var emitSkipped = false; var newLine = host.getNewLine(); var emitJavaScript = createFileEmitter(); ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile, emitOnlyDtsFiles); return { emitSkipped: emitSkipped, diagnostics: emitterDiagnostics.getDiagnostics(), emittedFiles: emittedFilesList, sourceMaps: sourceMapDataList }; function isUniqueLocalName(name, container) { for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) { if (node.locals && name in node.locals) { // We conservatively include alias symbols to cover cases where they're emitted as locals if (node.locals[name].flags & (107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */)) { return false; } } } return true; } function setLabeledJump(state, isBreak, labelText, labelMarker) { if (isBreak) { if (!state.labeledNonLocalBreaks) { state.labeledNonLocalBreaks = ts.createMap(); } state.labeledNonLocalBreaks[labelText] = labelMarker; } else { if (!state.labeledNonLocalContinues) { state.labeledNonLocalContinues = ts.createMap(); } state.labeledNonLocalContinues[labelText] = labelMarker; } } function hoistVariableDeclarationFromLoop(state, declaration) { if (!state.hoistedLocalVariables) { state.hoistedLocalVariables = []; } visit(declaration.name); function visit(node) { if (node.kind === 69 /* Identifier */) { state.hoistedLocalVariables.push(node); } else { for (var _a = 0, _b = node.elements; _a < _b.length; _a++) { var element = _b[_a]; visit(element.name); } } } } function createFileEmitter() { var writer = ts.createTextWriter(newLine); var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent; var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter(); var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos; var currentSourceFile; var currentText; var currentLineMap; var currentFileIdentifiers; var renamedDependencies; var isEs6Module; var isCurrentFileExternalModule; // name of an exporter function if file is a System external module // System.register([...], function (<exporter>) {...}) // exporting in System modules looks like: // export var x; ... x = 1 // => // var x;... exporter("x", x = 1) var exportFunctionForFile; var contextObjectForFile; var generatedNameSet; var nodeToGeneratedName; var computedPropertyNamesToGeneratedNames; var decoratedClassAliases; var convertedLoopState; var extendsEmitted; var assignEmitted; var decorateEmitted; var paramEmitted; var awaiterEmitted; var tempFlags = 0; var tempVariables; var tempParameters; var externalImports; var exportSpecifiers; var exportEquals; var hasExportStarsToExportValues; var detachedCommentsInfo; /** Sourcemap data that will get encoded */ var sourceMapData; /** Is the file being emitted into its own file */ var isOwnFileEmit; /** If removeComments is true, no leading-comments needed to be emitted **/ var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker; var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { }; var moduleEmitDelegates = ts.createMap((_a = {}, _a[ts.ModuleKind.ES6] = emitES6Module, _a[ts.ModuleKind.AMD] = emitAMDModule, _a[ts.ModuleKind.System] = emitSystemModule, _a[ts.ModuleKind.UMD] = emitUMDModule, _a[ts.ModuleKind.CommonJS] = emitCommonJSModule, _a )); var bundleEmitDelegates = ts.createMap((_b = {}, _b[ts.ModuleKind.ES6] = function () { }, _b[ts.ModuleKind.AMD] = emitAMDModule, _b[ts.ModuleKind.System] = emitSystemModule, _b[ts.ModuleKind.UMD] = function () { }, _b[ts.ModuleKind.CommonJS] = function () { }, _b )); return doEmit; function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) { sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit); generatedNameSet = ts.createMap(); nodeToGeneratedName = []; decoratedClassAliases = []; isOwnFileEmit = !isBundledEmit; // Emit helpers from all the files if (isBundledEmit && modulekind) { ts.forEach(sourceFiles, emitEmitHelpers); } // Do not call emit directly. It does not set the currentSourceFile. ts.forEach(sourceFiles, emitSourceFile); writeLine(); var sourceMappingURL = sourceMap.getSourceMappingURL(); if (sourceMappingURL) { write("//# " + "sourceMappingURL" + "=" + sourceMappingURL); // Sometimes tools can sometimes see this line as a source mapping url comment } writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, /*writeByteOrderMark*/ compilerOptions.emitBOM, sourceFiles); // reset the state sourceMap.reset(); writer.reset(); currentSourceFile = undefined; currentText = undefined; currentLineMap = undefined; exportFunctionForFile = undefined; contextObjectForFile = undefined; generatedNameSet = undefined; nodeToGeneratedName = undefined; decoratedClassAliases = undefined; computedPropertyNamesToGeneratedNames = undefined; convertedLoopState = undefined; extendsEmitted = false; decorateEmitted = false; paramEmitted = false; awaiterEmitted = false; assignEmitted = false; tempFlags = 0; tempVariables = undefined; tempParameters = undefined; externalImports = undefined; exportSpecifiers = undefined; exportEquals = undefined; hasExportStarsToExportValues = undefined; detachedCommentsInfo = undefined; sourceMapData = undefined; isEs6Module = false; renamedDependencies = undefined; isCurrentFileExternalModule = false; } function emitSourceFile(sourceFile) { currentSourceFile = sourceFile; currentText = sourceFile.text; currentLineMap = ts.getLineStarts(sourceFile); exportFunctionForFile = undefined; contextObjectForFile = undefined; isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"]; renamedDependencies = sourceFile.renamedDependencies; currentFileIdentifiers = sourceFile.identifiers; isCurrentFileExternalModule = ts.isExternalModule(sourceFile); setSourceFile(sourceFile); emitNodeWithCommentsAndWithoutSourcemap(sourceFile); } function isUniqueName(name) { return !resolver.hasGlobalName(name) && !(name in currentFileIdentifiers) && !(name in generatedNameSet); } // Return the next available name in the pattern _a ... _z, _0, _1, ... // TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name. // Note that names generated by makeTempVariableName and makeUniqueName will never conflict. function makeTempVariableName(flags) { if (flags && !(tempFlags & flags)) { var name_24 = flags === 268435456 /* _i */ ? "_i" : "_n"; if (isUniqueName(name_24)) { tempFlags |= flags; return name_24; } } while (true) { var count = tempFlags & 268435455 /* CountMask */; tempFlags++; // Skip over 'i' and 'n' if (count !== 8 && count !== 13) { var name_25 = count < 26 ? "_" + String.fromCharCode(97 /* a */ + count) : "_" + (count - 26); if (isUniqueName(name_25)) { return name_25; } } } } // Generate a name that is unique within the current file and doesn't conflict with any names // in global scope. The name is formed by adding an '_n' suffix to the specified base name, // where n is a positive integer. Note that names generated by makeTempVariableName and // makeUniqueName are guaranteed to never conflict. function makeUniqueName(baseName) { // Find the first unique 'name_n', where n is a positive number if (baseName.charCodeAt(baseName.length - 1) !== 95 /* _ */) { baseName += "_"; } var i = 1; while (true) { var generatedName = baseName + i; if (isUniqueName(generatedName)) { return generatedNameSet[generatedName] = generatedName; } i++; } } function generateNameForModuleOrEnum(node) { var name = node.name.text; // Use module/enum name itself if it is unique, otherwise make a unique variation return isUniqueLocalName(name, node) ? name : makeUniqueName(name); } function generateNameForImportOrExportDeclaration(node) { var expr = ts.getExternalModuleName(node); var baseName = expr.kind === 9 /* StringLiteral */ ? ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module"; return makeUniqueName(baseName); } function generateNameForExportDefault() { return makeUniqueName("default"); } function generateNameForClassExpression() { return makeUniqueName("class"); } function generateNameForNode(node) { switch (node.kind) { case 69 /* Identifier */: return makeUniqueName(node.text); case 225 /* ModuleDeclaration */: case 224 /* EnumDeclaration */: return generateNameForModuleOrEnum(node); case 230 /* ImportDeclaration */: case 236 /* ExportDeclaration */: return generateNameForImportOrExportDeclaration(node); case 220 /* FunctionDeclaration */: case 221 /* ClassDeclaration */: case 235 /* ExportAssignment */: return generateNameForExportDefault(); case 192 /* ClassExpression */: return generateNameForClassExpression(); default: ts.Debug.fail(); } } function getGeneratedNameForNode(node) { var id = ts.getNodeId(node); return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node))); } /** Write emitted output to disk */ function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) { if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) { ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles); } if (sourceMapDataList) { sourceMapDataList.push(sourceMap.getSourceMapData()); } ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles); } // Create a temporary variable with a unique unused name. function createTempVariable(flags) { var result = ts.createSynthesizedNode(69 /* Identifier */); result.text = makeTempVariableName(flags); return result; } function recordTempDeclaration(name) { if (!tempVariables) { tempVariables = []; } tempVariables.push(name); } function createAndRecordTempVariable(flags) { var temp = createTempVariable(flags); recordTempDeclaration(temp); return temp; } function emitTempDeclarations(newLine) { if (tempVariables) { if (newLine) { writeLine(); } else { write(" "); } write("var "); emitCommaList(tempVariables); write(";"); } } /** Emit the text for the given token that comes after startPos * This by default writes the text provided with the given tokenKind * but if optional emitFn callback is provided the text is emitted using the callback instead of default text * @param tokenKind the kind of the token to search and emit * @param startPos the position in the source to start searching for the token * @param emitFn if given will be invoked to emit the text instead of actual token emit */ function emitToken(tokenKind, startPos, emitFn) { var tokenStartPos = ts.skipTrivia(currentText, startPos); emitPos(tokenStartPos); var tokenString = ts.tokenToString(tokenKind); if (emitFn) { emitFn(); } else { write(tokenString); } var tokenEndPos = tokenStartPos + tokenString.length; emitPos(tokenEndPos); return tokenEndPos; } function emitOptional(prefix, node) { if (node) { write(prefix); emit(node); } } function emitParenthesizedIf(node, parenthesized) { if (parenthesized) { write("("); } emit(node); if (parenthesized) { write(")"); } } function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) { ts.Debug.assert(nodes.length > 0); increaseIndent(); if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) { if (spacesBetweenBraces) { write(" "); } } else { writeLine(); } for (var i = 0, n = nodes.length; i < n; i++) { if (i) { if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) { write(", "); } else { write(","); writeLine(); } } emit(nodes[i]); } if (nodes.hasTrailingComma && allowTrailingComma) { write(","); } decreaseIndent(); if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) { if (spacesBetweenBraces) { write(" "); } } else { writeLine(); } } function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) { if (!emitNode) { emitNode = emit; } for (var i = 0; i < count; i++) { if (multiLine) { if (i || leadingComma) { write(","); } writeLine(); } else { if (i || leadingComma) { write(", "); } } var node = nodes[start + i]; // This emitting is to make sure we emit following comment properly // ...(x, /*comment1*/ y)... // ^ => node.pos // "comment1" is not considered leading comment for "y" but rather // considered as trailing comment of the previous node. emitTrailingCommentsOfPosition(node.pos); emitNode(node); leadingComma = true; } if (trailingComma) { write(","); } if (multiLine && !noTrailingNewLine) { writeLine(); } return count; } function emitCommaList(nodes) { if (nodes) { emitList(nodes, 0, nodes.length, /*multiLine*/ false, /*trailingComma*/ false); } } function emitLines(nodes) { emitLinesStartingAt(nodes, /*startIndex*/ 0); } function emitLinesStartingAt(nodes, startIndex) { for (var i = startIndex; i < nodes.length; i++) { writeLine(); emit(nodes[i]); } } function isBinaryOrOctalIntegerLiteral(node, text) { if (node.kind === 8 /* NumericLiteral */ && text.length > 1) { switch (text.charCodeAt(1)) { case 98 /* b */: case 66 /* B */: case 111 /* o */: case 79 /* O */: return true; } } return false; } function emitLiteral(node) { var text = getLiteralText(node); if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 /* StringLiteral */ || ts.isTemplateLiteralKind(node.kind))) { writer.writeLiteral(text); } else if (languageVersion < 2 /* ES6 */ && isBinaryOrOctalIntegerLiteral(node, text)) { write(node.text); } else { write(text); } } function getLiteralText(node) { // Any template literal or string literal with an extended escape // (e.g. "\u{0067}") will need to be downleveled as a escaped string literal. if (languageVersion < 2 /* ES6 */ && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) { return getQuotedEscapedLiteralText('"', node.text, '"'); } // If we don't need to downlevel and we can reach the original source text using // the node's parent reference, then simply get the text as it was originally written. if (node.parent) { return ts.getTextOfNodeFromSourceText(currentText, node); } // If we can't reach the original source text, use the canonical form if it's a number, // or an escaped quoted form of the original text if it's string-like. switch (node.kind) { case 9 /* StringLiteral */: return getQuotedEscapedLiteralText('"', node.text, '"'); case 11 /* NoSubstitutionTemplateLiteral */: return getQuotedEscapedLiteralText("`", node.text, "`"); case 12 /* TemplateHead */: return getQuotedEscapedLiteralText("`", node.text, "${"); case 13 /* TemplateMiddle */: return getQuotedEscapedLiteralText("}", node.text, "${"); case 14 /* TemplateTail */: return getQuotedEscapedLiteralText("}", node.text, "`"); case 8 /* NumericLiteral */: return node.text; } ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for."); } function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) { return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote; } function emitDownlevelRawTemplateLiteral(node) { // Find original source text, since we need to emit the raw strings of the tagged template. // The raw strings contain the (escaped) strings of what the user wrote. // Examples: `\n` is converted to "\\n", a template string with a newline to "\n". var text = ts.getTextOfNodeFromSourceText(currentText, node); // text contains the original source, it will also contain quotes ("`"), dollar signs and braces ("${" and "}"), // thus we need to remove those characters. // First template piece starts with "`", others with "}" // Last template piece ends with "`", others with "${" var isLast = node.kind === 11 /* NoSubstitutionTemplateLiteral */ || node.kind === 14 /* TemplateTail */; text = text.substring(1, text.length - (isLast ? 1 : 2)); // Newline normalization: // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV. text = text.replace(/\r\n?/g, "\n"); text = ts.escapeString(text); write("\"" + text + "\""); } function emitDownlevelTaggedTemplateArray(node, literalEmitter) { write("["); if (node.template.kind === 11 /* NoSubstitutionTemplateLiteral */) { literalEmitter(node.template); } else { literalEmitter(node.template.head); ts.forEach(node.template.templateSpans, function (child) { write(", "); literalEmitter(child.literal); }); } write("]"); } function emitDownlevelTaggedTemplate(node) { var tempVariable = createAndRecordTempVariable(0 /* Auto */); write("("); emit(tempVariable); write(" = "); emitDownlevelTaggedTemplateArray(node, emit); write(", "); emit(tempVariable); write(".raw = "); emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral); write(", "); emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag)); write("("); emit(tempVariable); // Now we emit the expressions if (node.template.kind === 189 /* TemplateExpression */) { ts.forEach(node.template.templateSpans, function (templateSpan) { write(", "); var needsParens = templateSpan.expression.kind === 187 /* BinaryExpression */ && templateSpan.expression.operatorToken.kind === 24 /* CommaToken */; emitParenthesizedIf(templateSpan.expression, needsParens); }); } write("))"); } function emitTemplateExpression(node) { // In ES6 mode and above, we can simply emit each portion of a template in order, but in // ES3 & ES5 we must convert the template expression into a series of string concatenations. if (languageVersion >= 2 /* ES6 */) { ts.forEachChild(node, emit); return; } var emitOuterParens = ts.isExpression(node.parent) && templateNeedsParens(node, node.parent); if (emitOuterParens) { write("("); } var headEmitted = false; if (shouldEmitTemplateHead()) { emitLiteral(node.head); headEmitted = true; } for (var i = 0, n = node.templateSpans.length; i < n; i++) { var templateSpan = node.templateSpans[i]; // Check if the expression has operands and binds its operands less closely than binary '+'. // If it does, we need to wrap the expression in parentheses. Otherwise, something like // `abc${ 1 << 2 }` // becomes // "abc" + 1 << 2 + "" // which is really // ("abc" + 1) << (2 + "") // rather than // "abc" + (1 << 2) + "" var needsParens = templateSpan.expression.kind !== 178 /* ParenthesizedExpression */ && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1 /* GreaterThan */; if (i > 0 || headEmitted) { // If this is the first span and the head was not emitted, then this templateSpan's // expression will be the first to be emitted. Don't emit the preceding ' + ' in that // case. write(" + "); } emitParenthesizedIf(templateSpan.expression, needsParens); // Only emit if the literal is non-empty. // The binary '+' operator is left-associative, so the first string concatenation // with the head will force the result up to this point to be a string. // Emitting a '+ ""' has no semantic effect for middles and tails. if (templateSpan.literal.text.length !== 0) { write(" + "); emitLiteral(templateSpan.literal); } } if (emitOuterParens) { write(")"); } function shouldEmitTemplateHead() { // If this expression has an empty head literal and the first template span has a non-empty // literal, then emitting the empty head literal is not necessary. // `${ foo } and ${ bar }` // can be emitted as // foo + " and " + bar // This is because it is only required that one of the first two operands in the emit // output must be a string literal, so that the other operand and all following operands // are forced into strings. // // If the first template span has an empty literal, then the head must still be emitted. // `${ foo }${ bar }` // must still be emitted as // "" + foo + bar // There is always atleast one templateSpan in this code path, since // NoSubstitutionTemplateLiterals are directly emitted via emitLiteral() ts.Debug.assert(node.templateSpans.length !== 0); return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0; } function templateNeedsParens(template, parent) { switch (parent.kind) { case 174 /* CallExpression */: case 175 /* NewExpression */: return parent.expression === template; case 176 /* TaggedTemplateExpression */: case 178 /* ParenthesizedExpression */: return false; default: return comparePrecedenceToBinaryPlus(parent) !== -1 /* LessThan */; } } /** * Returns whether the expression has lesser, greater, * or equal precedence to the binary '+' operator */ function comparePrecedenceToBinaryPlus(expression) { // All binary expressions have lower precedence than '+' apart from '*', '/', and '%' // which have greater precedence and '-' which has equal precedence. // All unary operators have a higher precedence apart from yield. // Arrow functions and conditionals have a lower precedence, // although we convert the former into regular function expressions in ES5 mode, // and in ES6 mode this function won't get called anyway. // // TODO (drosen): Note that we need to account for the upcoming 'yield' and // spread ('...') unary operators that are anticipated for ES6. switch (expression.kind) { case 187 /* BinaryExpression */: switch (expression.operatorToken.kind) { case 37 /* AsteriskToken */: case 39 /* SlashToken */: case 40 /* PercentToken */: return 1 /* GreaterThan */; case 35 /* PlusToken */: case 36 /* MinusToken */: return 0 /* EqualTo */; default: return -1 /* LessThan */; } case 190 /* YieldExpression */: case 188 /* ConditionalExpression */: return -1 /* LessThan */; default: return 1 /* GreaterThan */; } } } function emitTemplateSpan(span) { emit(span.expression); emit(span.literal); } function jsxEmitReact(node) { /// Emit a tag name, which is either '"div"' for lower-cased names, or /// 'Div' for upper-cased or dotted names function emitTagName(name) { if (name.kind === 69 /* Identifier */ && ts.isIntrinsicJsxName(name.text)) { write('"'); emit(name); write('"'); } else { emit(name); } } /// Emit an attribute name, which is quoted if it needs to be quoted. Because /// these emit into an object literal property name, we don't need to be worried /// about keywords, just non-identifier characters function emitAttributeName(name) { if (/^[A-Za-z_]\w*$/.test(name.text)) { emit(name); } else { write('"'); emit(name); write('"'); } } /// Emit an name/value pair for an attribute (e.g. "x: 3") function emitJsxAttribute(node) { emitAttributeName(node.name); write(": "); if (node.initializer) { emit(node.initializer); } else { write("true"); } } function emitJsxElement(openingNode, children) { var syntheticReactRef = ts.createSynthesizedNode(69 /* Identifier */); syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React"; syntheticReactRef.parent = openingNode; // Call React.createElement(tag, ... emitLeadingComments(openingNode); emitExpressionIdentifier(syntheticReactRef); write(".createElement("); emitTagName(openingNode.tagName); write(", "); // Attribute list if (openingNode.attributes.length === 0) { // When there are no attributes, React wants "null" write("null"); } else { // Either emit one big object literal (no spread attribs), or // a call to the __assign helper var attrs = openingNode.attributes; if (ts.forEach(attrs, function (attr) { return attr.kind === 247 /* JsxSpreadAttribute */; })) { write("__assign("); var haveOpenedObjectLiteral = false; for (var i = 0; i < attrs.length; i++) { if (attrs[i].kind === 247 /* JsxSpreadAttribute */) { // If this is the first argument, we need to emit a {} as the first argument if (i === 0) { write("{}, "); } if (haveOpenedObjectLiteral) { write("}"); haveOpenedObjectLiteral = false; } if (i > 0) { write(", "); } emit(attrs[i].expression); } else { ts.Debug.assert(attrs[i].kind === 246 /* JsxAttribute */); if (haveOpenedObjectLiteral) { write(", "); } else { haveOpenedObjectLiteral = true; if (i > 0) { write(", "); } write("{"); } emitJsxAttribute(attrs[i]); } } if (haveOpenedObjectLiteral) write("}"); write(")"); // closing paren to React.__spread( } else { // One object literal with all the attributes in them write("{"); for (var i = 0, n = attrs.length; i < n; i++) { if (i > 0) { write(", "); } emitJsxAttribute(attrs[i]); } write("}"); } } // Children if (children) { var firstChild = void 0; var multipleEmittableChildren = false; for (var i = 0, n = children.length; i < n; i++) { var jsxChild = children[i]; if (isJsxChildEmittable(jsxChild)) { // we need to decide whether to emit in single line or multiple lines as indented list // store firstChild reference, if we see another emittable child, then emit accordingly if (!firstChild) { write(", "); firstChild = jsxChild; } else { // more than one emittable child, emit indented list if (!multipleEmittableChildren) { multipleEmittableChildren = true; increaseIndent(); writeLine(); emit(firstChild); } write(", "); writeLine(); emit(jsxChild); } } } if (multipleEmittableChildren) { decreaseIndent(); } else if (firstChild) { if (firstChild.kind !== 241 /* JsxElement */ && firstChild.kind !== 242 /* JsxSelfClosingElement */) { emit(firstChild); } else { // If the only child is jsx element, put it on a new indented line increaseIndent(); writeLine(); emit(firstChild); writeLine(); decreaseIndent(); } } } // Closing paren write(")"); // closes "React.createElement(" emitTrailingComments(openingNode); } if (node.kind === 241 /* JsxElement */) { emitJsxElement(node.openingElement, node.children); } else { ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */); emitJsxElement(node); } } function jsxEmitPreserve(node) { function emitJsxAttribute(node) { emit(node.name); if (node.initializer) { write("="); emit(node.initializer); } } function emitJsxSpreadAttribute(node) { write("{..."); emit(node.expression); write("}"); } function emitAttributes(attribs) { for (var i = 0, n = attribs.length; i < n; i++) { if (i > 0) { write(" "); } if (attribs[i].kind === 247 /* JsxSpreadAttribute */) { emitJsxSpreadAttribute(attribs[i]); } else { ts.Debug.assert(attribs[i].kind === 246 /* JsxAttribute */); emitJsxAttribute(attribs[i]); } } } function emitJsxOpeningOrSelfClosingElement(node) { write("<"); emit(node.tagName); if (node.attributes.length > 0 || (node.kind === 242 /* JsxSelfClosingElement */)) { write(" "); } emitAttributes(node.attributes); if (node.kind === 242 /* JsxSelfClosingElement */) { write("/>"); } else { write(">"); } } function emitJsxClosingElement(node) { write("</"); emit(node.tagName); write(">"); } function emitJsxElement(node) { emitJsxOpeningOrSelfClosingElement(node.openingElement); for (var i = 0, n = node.children.length; i < n; i++) { emit(node.children[i]); } emitJsxClosingElement(node.closingElement); } if (node.kind === 241 /* JsxElement */) { emitJsxElement(node); } else { ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */); emitJsxOpeningOrSelfClosingElement(node); } } // This function specifically handles numeric/string literals for enum and accessor 'identifiers'. // In a sense, it does not actually emit identifiers as much as it declares a name for a specific property. // For example, this is utilized when feeding in a result to Object.defineProperty. function emitExpressionForPropertyName(node) { ts.Debug.assert(node.kind !== 169 /* BindingElement */); if (node.kind === 9 /* StringLiteral */) { emitLiteral(node); } else if (node.kind === 140 /* ComputedPropertyName */) { // if this is a decorated computed property, we will need to capture the result // of the property expression so that we can apply decorators later. This is to ensure // we don't introduce unintended side effects: // // class C { // [_a = x]() { } // } // // The emit for the decorated computed property decorator is: // // __decorate([dec], C.prototype, _a, Object.getOwnPropertyDescriptor(C.prototype, _a)); // if (ts.nodeIsDecorated(node.parent)) { if (!computedPropertyNamesToGeneratedNames) { computedPropertyNamesToGeneratedNames = []; } var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)]; if (generatedName) { // we have already generated a variable for this node, write that value instead. write(generatedName); return; } generatedName = createAndRecordTempVariable(0 /* Auto */).text; computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName; write(generatedName); write(" = "); } emit(node.expression); } else { write('"'); if (node.kind === 8 /* NumericLiteral */) { write(node.text); } else { writeTextOfNode(currentText, node); } write('"'); } } function isExpressionIdentifier(node) { var parent = node.parent; switch (parent.kind) { case 170 /* ArrayLiteralExpression */: case 195 /* AsExpression */: case 184 /* AwaitExpression */: case 187 /* BinaryExpression */: case 174 /* CallExpression */: case 249 /* CaseClause */: case 140 /* ComputedPropertyName */: case 188 /* ConditionalExpression */: case 143 /* Decorator */: case 181 /* DeleteExpression */: case 204 /* DoStatement */: case 173 /* ElementAccessExpression */: case 235 /* ExportAssignment */: case 202 /* ExpressionStatement */: case 194 /* ExpressionWithTypeArguments */: case 206 /* ForStatement */: case 207 /* ForInStatement */: case 208 /* ForOfStatement */: case 203 /* IfStatement */: case 245 /* JsxClosingElement */: case 242 /* JsxSelfClosingElement */: case 243 /* JsxOpeningElement */: case 247 /* JsxSpreadAttribute */: case 248 /* JsxExpression */: case 175 /* NewExpression */: case 196 /* NonNullExpression */: case 178 /* ParenthesizedExpression */: case 186 /* PostfixUnaryExpression */: case 185 /* PrefixUnaryExpression */: case 211 /* ReturnStatement */: case 254 /* ShorthandPropertyAssignment */: case 191 /* SpreadElementExpression */: case 213 /* SwitchStatement */: case 176 /* TaggedTemplateExpression */: case 197 /* TemplateSpan */: case 215 /* ThrowStatement */: case 177 /* TypeAssertionExpression */: case 182 /* TypeOfExpression */: case 183 /* VoidExpression */: case 205 /* WhileStatement */: case 212 /* WithStatement */: case 190 /* YieldExpression */: return true; case 169 /* BindingElement */: case 255 /* EnumMember */: case 142 /* Parameter */: case 253 /* PropertyAssignment */: case 145 /* PropertyDeclaration */: case 218 /* VariableDeclaration */: return parent.initializer === node; case 172 /* PropertyAccessExpression */: return parent.expression === node; case 180 /* ArrowFunction */: case 179 /* FunctionExpression */: return parent.body === node; case 229 /* ImportEqualsDeclaration */: return parent.moduleReference === node; case 139 /* QualifiedName */: return parent.left === node; } return false; } function emitExpressionIdentifier(node) { var container = resolver.getReferencedExportContainer(node); if (container) { if (container.kind === 256 /* SourceFile */) { // Identifier references module export if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) { write("exports."); } } else { // Identifier references namespace export write(getGeneratedNameForNode(container)); write("."); } } else { if (modulekind !== ts.ModuleKind.ES6) { var declaration = resolver.getReferencedImportDeclaration(node); if (declaration) { if (declaration.kind === 231 /* ImportClause */) { // Identifier references default import write(getGeneratedNameForNode(declaration.parent)); write(languageVersion === 0 /* ES3 */ ? '["default"]' : ".default"); return; } else if (declaration.kind === 234 /* ImportSpecifier */) { // Identifier references named import write(getGeneratedNameForNode(declaration.parent.parent.parent)); var name_26 = declaration.propertyName || declaration.name; var identifier = ts.getTextOfNodeFromSourceText(currentText, name_26); if (languageVersion === 0 /* ES3 */ && identifier === "default") { write('["default"]'); } else { write("."); write(identifier); } return; } } } if (languageVersion < 2 /* ES6 */) { var declaration = resolver.getReferencedDeclarationWithCollidingName(node); if (declaration) { write(getGeneratedNameForNode(declaration.name)); return; } } else if (resolver.getNodeCheckFlags(node) & 1048576 /* BodyScopedClassBinding */) { // Due to the emit for class decorators, any reference to the class from inside of the class body // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind // behavior of class names in ES6. var declaration = resolver.getReferencedValueDeclaration(node); if (declaration) { var classAlias = decoratedClassAliases[ts.getNodeId(declaration)]; if (classAlias !== undefined) { write(classAlias); return; } } } } if (ts.nodeIsSynthesized(node)) { write(node.text); } else { writeTextOfNode(currentText, node); } } function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) { if (languageVersion < 2 /* ES6 */) { var parent_13 = node.parent; switch (parent_13.kind) { case 169 /* BindingElement */: case 221 /* ClassDeclaration */: case 224 /* EnumDeclaration */: case 218 /* VariableDeclaration */: return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13); } } return false; } function getClassExpressionInPropertyAccessInStaticPropertyDeclaration(node) { if (languageVersion >= 2 /* ES6 */) { var parent_14 = node.parent; if (parent_14.kind === 172 /* PropertyAccessExpression */ && parent_14.expression === node) { parent_14 = parent_14.parent; while (parent_14 && parent_14.kind !== 145 /* PropertyDeclaration */) { parent_14 = parent_14.parent; } return parent_14 && parent_14.kind === 145 /* PropertyDeclaration */ && (parent_14.flags & 32 /* Static */) !== 0 && parent_14.parent.kind === 192 /* ClassExpression */ ? parent_14.parent : undefined; } } return undefined; } function emitIdentifier(node) { if (convertedLoopState) { if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) { // in converted loop body arguments cannot be used directly. var name_27 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments")); write(name_27); return; } } if (!node.parent) { write(node.text); } else if (isExpressionIdentifier(node)) { var classExpression = getClassExpressionInPropertyAccessInStaticPropertyDeclaration(node); if (classExpression) { var declaration = resolver.getReferencedValueDeclaration(node); if (declaration === classExpression) { write(getGeneratedNameForNode(declaration.name)); return; } } emitExpressionIdentifier(node); } else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) { write(getGeneratedNameForNode(node)); } else if (ts.nodeIsSynthesized(node)) { write(node.text); } else { writeTextOfNode(currentText, node); } } function emitThis(node) { if (resolver.getNodeCheckFlags(node) & 2 /* LexicalThis */) { write("_this"); } else if (convertedLoopState) { write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this"))); } else { write("this"); } } function emitSuper(node) { if (languageVersion >= 2 /* ES6 */) { write("super"); } else { var flags = resolver.getNodeCheckFlags(node); if (flags & 256 /* SuperInstance */) { write("_super.prototype"); } else { write("_super"); } } } function emitObjectBindingPattern(node) { write("{ "); var elements = node.elements; emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma); write(" }"); } function emitArrayBindingPattern(node) { write("["); var elements = node.elements; emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma); write("]"); } function emitBindingElement(node) { if (node.propertyName) { emit(node.propertyName); write(": "); } if (node.dotDotDotToken) { write("..."); } if (ts.isBindingPattern(node.name)) { emit(node.name); } else { emitModuleMemberName(node); } emitOptional(" = ", node.initializer); } function emitSpreadElementExpression(node) { write("..."); emit(node.expression); } function emitYieldExpression(node) { write(ts.tokenToString(114 /* YieldKeyword */)); if (node.asteriskToken) { write("*"); } if (node.expression) { write(" "); emit(node.expression); } } function emitAwaitExpression(node) { var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node); if (needsParenthesis) { write("("); } write(ts.tokenToString(114 /* YieldKeyword */)); write(" "); emit(node.expression); if (needsParenthesis) { write(")"); } } function needsParenthesisForAwaitExpressionAsYield(node) { if (node.parent.kind === 187 /* BinaryExpression */ && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) { return true; } else if (node.parent.kind === 188 /* ConditionalExpression */ && node.parent.condition === node) { return true; } else if (node.parent.kind === 185 /* PrefixUnaryExpression */ || node.parent.kind === 181 /* DeleteExpression */ || node.parent.kind === 182 /* TypeOfExpression */ || node.parent.kind === 183 /* VoidExpression */) { return true; } return false; } function needsParenthesisForPropertyAccessOrInvocation(node) { switch (node.kind) { case 69 /* Identifier */: case 170 /* ArrayLiteralExpression */: case 172 /* PropertyAccessExpression */: case 173 /* ElementAccessExpression */: case 174 /* CallExpression */: case 178 /* ParenthesizedExpression */: // This list is not exhaustive and only includes those cases that are relevant // to the check in emitArrayLiteral. More cases can be added as needed. return false; } return true; } function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) { var pos = 0; var group = 0; var length = elements.length; while (pos < length) { // Emit using the pattern <group0>.concat(<group1>, <group2>, ...) if (group === 1 && useConcat) { write(".concat("); } else if (group > 0) { write(", "); } var e = elements[pos]; if (e.kind === 191 /* SpreadElementExpression */) { e = e.expression; emitParenthesizedIf(e, /*parenthesized*/ group === 0 && needsParenthesisForPropertyAccessOrInvocation(e)); pos++; if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170 /* ArrayLiteralExpression */) { write(".slice()"); } } else { var i = pos; while (i < length && elements[i].kind !== 191 /* SpreadElementExpression */) { i++; } write("["); if (multiLine) { increaseIndent(); } emitList(elements, pos, i - pos, multiLine, trailingComma && i === length); if (multiLine) { decreaseIndent(); } write("]"); pos = i; } group++; } if (group > 1) { if (useConcat) { write(")"); } } } function isSpreadElementExpression(node) { return node.kind === 191 /* SpreadElementExpression */; } function emitArrayLiteral(node) { var elements = node.elements; if (elements.length === 0) { write("[]"); } else if (languageVersion >= 2 /* ES6 */ || !ts.forEach(elements, isSpreadElementExpression)) { write("["); emitLinePreservingList(node, node.elements, elements.hasTrailingComma, /*spacesBetweenBraces*/ false); write("]"); } else { emitListWithSpread(elements, /*needsUniqueCopy*/ true, /*multiLine*/ node.multiLine, /*trailingComma*/ elements.hasTrailingComma, /*useConcat*/ true); } } function emitObjectLiteralBody(node, numElements) { if (numElements === 0) { write("{}"); return; } write("{"); if (numElements > 0) { var properties = node.properties; // If we are not doing a downlevel transformation for object literals, // then try to preserve the original shape of the object literal. // Otherwise just try to preserve the formatting. if (numElements === properties.length) { emitLinePreservingList(node, properties, /*allowTrailingComma*/ languageVersion >= 1 /* ES5 */, /*spacesBetweenBraces*/ true); } else { var multiLine = node.multiLine; if (!multiLine) { write(" "); } else { increaseIndent(); } emitList(properties, 0, numElements, /*multiLine*/ multiLine, /*trailingComma*/ false); if (!multiLine) { write(" "); } else { decreaseIndent(); } } } write("}"); } function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) { var multiLine = node.multiLine; var properties = node.properties; write("("); if (multiLine) { increaseIndent(); } // For computed properties, we need to create a unique handle to the object // literal so we can modify it without risking internal assignments tainting the object. var tempVar = createAndRecordTempVariable(0 /* Auto */); // Write out the first non-computed properties // (or all properties if none of them are computed), // then emit the rest through indexing on the temp variable. emit(tempVar); write(" = "); emitObjectLiteralBody(node, firstComputedPropertyIndex); for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) { var property = properties[i]; if (property.kind === 149 /* GetAccessor */ || property.kind === 150 /* SetAccessor */) { // TODO (drosen): Reconcile with 'emitMemberFunctions'. var accessors = ts.getAllAccessorDeclarations(node.properties, property); if (property !== accessors.firstAccessor) { continue; } writeComma(); emitStart(property); write("Object.defineProperty("); emit(tempVar); write(", "); emitStart(property.name); emitExpressionForPropertyName(property.name); emitEnd(property.name); write(", {"); increaseIndent(); if (accessors.getAccessor) { writeLine(); emitLeadingComments(accessors.getAccessor); write("get: "); emitStart(accessors.getAccessor); write("function "); emitSignatureAndBody(accessors.getAccessor); emitEnd(accessors.getAccessor); emitTrailingComments(accessors.getAccessor); write(","); } if (accessors.setAccessor) { writeLine(); emitLeadingComments(accessors.setAccessor); write("set: "); emitStart(accessors.setAccessor); write("function "); emitSignatureAndBody(accessors.setAccessor); emitEnd(accessors.setAccessor); emitTrailingComments(accessors.setAccessor); write(","); } writeLine(); write("enumerable: true,"); writeLine(); write("configurable: true"); decreaseIndent(); writeLine(); write("})"); emitEnd(property); } else { writeComma(); emitStart(property); emitLeadingComments(property); emitStart(property.name); emit(tempVar); emitMemberAccessForPropertyName(property.name); emitEnd(property.name); write(" = "); if (property.kind === 253 /* PropertyAssignment */) { emit(property.initializer); } else if (property.kind === 254 /* ShorthandPropertyAssignment */) { emitExpressionIdentifier(property.name); } else if (property.kind === 147 /* MethodDeclaration */) { emitFunctionDeclaration(property); } else { ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind); } emitEnd(property); } } writeComma(); emit(tempVar); if (multiLine) { decreaseIndent(); writeLine(); } write(")"); function writeComma() { if (multiLine) { write(","); writeLine(); } else { write(", "); } } } function emitObjectLiteral(node) { var properties = node.properties; if (languageVersion < 2 /* ES6 */) { var numProperties = properties.length; // Find the first computed property. // Everything until that point can be emitted as part of the initial object literal. var numInitialNonComputedProperties = numProperties; for (var i = 0, n = properties.length; i < n; i++) { if (properties[i].name.kind === 140 /* ComputedPropertyName */) { numInitialNonComputedProperties = i; break; } } var hasComputedProperty = numInitialNonComputedProperties !== properties.length; if (hasComputedProperty) { emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties); return; } } // Ordinary case: either the object has no computed properties // or we're compiling with an ES6+ target. emitObjectLiteralBody(node, properties.length); } function createBinaryExpression(left, operator, right, startsOnNewLine) { var result = ts.createSynthesizedNode(187 /* BinaryExpression */, startsOnNewLine); result.operatorToken = ts.createSynthesizedNode(operator); result.left = left; result.right = right; return result; } function createPropertyAccessExpression(expression, name) { var result = ts.createSynthesizedNode(172 /* PropertyAccessExpression */); result.expression = parenthesizeForAccess(expression); result.name = name; return result; } function createElementAccessExpression(expression, argumentExpression) { var result = ts.createSynthesizedNode(173 /* ElementAccessExpression */); result.expression = parenthesizeForAccess(expression); result.argumentExpression = argumentExpression; return result; } function parenthesizeForAccess(expr) { // When diagnosing whether the expression needs parentheses, the decision should be based // on the innermost expression in a chain of nested type assertions. while (expr.kind === 177 /* TypeAssertionExpression */ || expr.kind === 195 /* AsExpression */ || expr.kind === 196 /* NonNullExpression */) { expr = expr.expression; } // isLeftHandSideExpression is almost the correct criterion for when it is not necessary // to parenthesize the expression before a dot. The known exceptions are: // // NewExpression: // new C.x -> not the same as (new C).x // NumberLiteral // 1.x -> not the same as (1).x // if (ts.isLeftHandSideExpression(expr) && expr.kind !== 175 /* NewExpression */ && expr.kind !== 8 /* NumericLiteral */) { return expr; } var node = ts.createSynthesizedNode(178 /* ParenthesizedExpression */); node.expression = expr; return node; } function emitComputedPropertyName(node) { write("["); emitExpressionForPropertyName(node); write("]"); } function emitMethod(node) { if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) { write("*"); } emit(node.name); if (languageVersion < 2 /* ES6 */) { write(": function "); } emitSignatureAndBody(node); } function emitPropertyAssignment(node) { emit(node.name); write(": "); // This is to ensure that we emit comment in the following case: // For example: // obj = { // id: /*comment1*/ ()=>void // } // "comment1" is not considered to be leading comment for node.initializer // but rather a trailing comment on the previous node. emitTrailingCommentsOfPosition(node.initializer.pos); emit(node.initializer); } // Return true if identifier resolves to an exported member of a namespace function isExportReference(node) { var container = resolver.getReferencedExportContainer(node); return !!container; } // Return true if identifier resolves to an imported identifier function isImportedReference(node) { var declaration = resolver.getReferencedImportDeclaration(node); return declaration && (declaration.kind === 231 /* ImportClause */ || declaration.kind === 234 /* ImportSpecifier */); } function emitShorthandPropertyAssignment(node) { // The name property of a short-hand property assignment is considered an expression position, so here // we manually emit the identifier to avoid rewriting. writeTextOfNode(currentText, node.name); // If emitting pre-ES6 code, or if the name requires rewriting when resolved as an expression identifier, // we emit a normal property assignment. For example: // module m { // export let y; // } // module m { // let obj = { y }; // } // Here we need to emit obj = { y : m.y } regardless of the output target. // The same rules apply for imported identifiers when targeting module formats with indirect access to // the imported identifiers. For example, when targeting CommonJS: // // import {foo} from './foo'; // export const baz = { foo }; // // Must be transformed into: // // const foo_1 = require('./foo'); // exports.baz = { foo: foo_1.foo }; // if (languageVersion < 2 /* ES6 */ || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isExportReference(node.name)) { // Emit identifier as an identifier write(": "); emitExpressionIdentifier(node.name); } if (languageVersion >= 2 /* ES6 */ && node.objectAssignmentInitializer) { write(" = "); emit(node.objectAssignmentInitializer); } } function tryEmitConstantValue(node) { var constantValue = tryGetConstEnumValue(node); if (constantValue !== undefined) { write(constantValue.toString()); if (!compilerOptions.removeComments) { var propertyName = node.kind === 172 /* PropertyAccessExpression */ ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression); write(" /* " + propertyName + " */"); } return true; } return false; } function tryGetConstEnumValue(node) { if (compilerOptions.isolatedModules) { return undefined; } return node.kind === 172 /* PropertyAccessExpression */ || node.kind === 173 /* ElementAccessExpression */ ? resolver.getConstantValue(node) : undefined; } // Returns 'true' if the code was actually indented, false otherwise. // If the code is not indented, an optional valueToWriteWhenNotIndenting will be // emitted instead. function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) { var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2); // Always use a newline for synthesized code if the synthesizer desires it. var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2); if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) { increaseIndent(); writeLine(); return true; } else { if (valueToWriteWhenNotIndenting) { write(valueToWriteWhenNotIndenting); } return false; } } function emitPropertyAccess(node) { if (tryEmitConstantValue(node)) { return; } if (languageVersion === 2 /* ES6 */ && node.expression.kind === 95 /* SuperKeyword */ && isInAsyncMethodWithSuperInES6(node)) { var name_28 = ts.createSynthesizedNode(9 /* StringLiteral */); name_28.text = node.name.text; emitSuperAccessInAsyncMethod(node.expression, name_28); return; } emit(node.expression); var dotRangeStart = ts.nodeIsSynthesized(node.expression) ? -1 : node.expression.end; var dotRangeEnd = ts.nodeIsSynthesized(node.expression) ? -1 : ts.skipTrivia(currentText, node.expression.end) + 1; var dotToken = { pos: dotRangeStart, end: dotRangeEnd }; var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, dotToken); // 1 .toString is a valid property access, emit a space after the literal // Also emit a space if expression is a integer const enum value - it will appear in generated code as numeric literal var shouldEmitSpace = false; if (!indentedBeforeDot) { if (node.expression.kind === 8 /* NumericLiteral */) { // check if numeric literal was originally written with a dot var text = ts.getTextOfNodeFromSourceText(currentText, node.expression); shouldEmitSpace = text.indexOf(ts.tokenToString(21 /* DotToken */)) < 0; } else { // check if constant enum value is integer var constantValue = tryGetConstEnumValue(node.expression); // isFinite handles cases when constantValue is undefined shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue; } } if (shouldEmitSpace) { write(" ."); } else { write("."); } var indentedAfterDot = indentIfOnDifferentLines(node, dotToken, node.name); emit(node.name); decreaseIndentIf(indentedBeforeDot, indentedAfterDot); } function emitQualifiedName(node) { emit(node.left); write("."); emit(node.right); } function emitQualifiedNameAsExpression(node, useFallback) { if (node.left.kind === 69 /* Identifier */) { emitEntityNameAsExpression(node.left, useFallback); } else if (useFallback) { var temp = createAndRecordTempVariable(0 /* Auto */); write("("); emitNodeWithoutSourceMap(temp); write(" = "); emitEntityNameAsExpression(node.left, /*useFallback*/ true); write(") && "); emitNodeWithoutSourceMap(temp); } else { emitEntityNameAsExpression(node.left, /*useFallback*/ false); } write("."); emit(node.right); } function emitEntityNameAsExpression(node, useFallback) { switch (node.kind) { case 69 /* Identifier */: if (useFallback) { write("typeof "); emitExpressionIdentifier(node); write(" !== 'undefined' && "); } emitExpressionIdentifier(node); break; case 139 /* QualifiedName */: emitQualifiedNameAsExpression(node, useFallback); break; default: emitNodeWithoutSourceMap(node); break; } } function emitIndexedAccess(node) { if (tryEmitConstantValue(node)) { return; } if (languageVersion === 2 /* ES6 */ && node.expression.kind === 95 /* SuperKeyword */ && isInAsyncMethodWithSuperInES6(node)) { emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression); return; } emit(node.expression); write("["); emit(node.argumentExpression); write("]"); } function hasSpreadElement(elements) { return ts.forEach(elements, function (e) { return e.kind === 191 /* SpreadElementExpression */; }); } function skipParentheses(node) { while (node.kind === 178 /* ParenthesizedExpression */ || node.kind === 177 /* TypeAssertionExpression */ || node.kind === 195 /* AsExpression */ || node.kind === 196 /* NonNullExpression */) { node = node.expression; } return node; } function emitCallTarget(node) { if (node.kind === 69 /* Identifier */ || node.kind === 97 /* ThisKeyword */ || node.kind === 95 /* SuperKeyword */) { emit(node); return node; } var temp = createAndRecordTempVariable(0 /* Auto */); write("("); emit(temp); write(" = "); emit(node); write(")"); return temp; } function emitCallWithSpread(node) { var target; var expr = skipParentheses(node.expression); if (expr.kind === 172 /* PropertyAccessExpression */) { // Target will be emitted as "this" argument target = emitCallTarget(expr.expression); write("."); emit(expr.name); } else if (expr.kind === 173 /* ElementAccessExpression */) { // Target will be emitted as "this" argument target = emitCallTarget(expr.expression); write("["); emit(expr.argumentExpression); write("]"); } else if (expr.kind === 95 /* SuperKeyword */) { target = expr; write("_super"); } else { emit(node.expression); } write(".apply("); if (target) { if (target.kind === 95 /* SuperKeyword */) { // Calls of form super(...) and super.foo(...) emitThis(target); } else { // Calls of form obj.foo(...) emit(target); } } else { // Calls of form foo(...) write("void 0"); } write(", "); emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ true); write(")"); } function isInAsyncMethodWithSuperInES6(node) { if (languageVersion === 2 /* ES6 */) { var container = ts.getSuperContainer(node, /*includeFunctions*/ false); if (container && resolver.getNodeCheckFlags(container) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */)) { return true; } } return false; } function emitSuperAccessInAsyncMethod(superNode, argumentExpression) { var container = ts.getSuperContainer(superNode, /*includeFunctions*/ false); var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096 /* AsyncMethodWithSuperBinding */; write("_super("); emit(argumentExpression); write(isSuperBinding ? ").value" : ")"); } function emitCallExpression(node) { if (languageVersion < 2 /* ES6 */ && hasSpreadElement(node.arguments)) { emitCallWithSpread(node); return; } var expression = node.expression; var superCall = false; var isAsyncMethodWithSuper = false; if (expression.kind === 95 /* SuperKeyword */) { emitSuper(expression); superCall = true; } else { superCall = ts.isSuperPropertyOrElementAccess(expression); isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node); emit(expression); } if (superCall && (languageVersion < 2 /* ES6 */ || isAsyncMethodWithSuper)) { write(".call("); emitThis(expression); if (node.arguments.length) { write(", "); emitCommaList(node.arguments); } write(")"); } else { write("("); emitCommaList(node.arguments); write(")"); } } function emitNewExpression(node) { write("new "); // Spread operator logic is supported in new expressions in ES5 using a combination // of Function.prototype.bind() and Function.prototype.apply(). // // Example: // // var args = [1, 2, 3, 4, 5]; // new Array(...args); // // is compiled into the following ES5: // // var args = [1, 2, 3, 4, 5]; // new (Array.bind.apply(Array, [void 0].concat(args))); // // The 'thisArg' to 'bind' is ignored when invoking the result of 'bind' with 'new', // Thus, we set it to undefined ('void 0'). if (languageVersion === 1 /* ES5 */ && node.arguments && hasSpreadElement(node.arguments)) { write("("); var target = emitCallTarget(node.expression); write(".bind.apply("); emit(target); write(", [void 0].concat("); emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ false); write(")))"); write("()"); } else { emit(node.expression); if (node.arguments) { write("("); emitCommaList(node.arguments); write(")"); } } } function emitTaggedTemplateExpression(node) { if (languageVersion >= 2 /* ES6 */) { emit(node.tag); write(" "); emit(node.template); } else { emitDownlevelTaggedTemplate(node); } } function emitParenExpression(node) { // If the node is synthesized, it means the emitter put the parentheses there, // not the user. If we didn't want them, the emitter would not have put them // there. if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180 /* ArrowFunction */) { if (node.expression.kind === 177 /* TypeAssertionExpression */ || node.expression.kind === 195 /* AsExpression */ || node.expression.kind === 196 /* NonNullExpression */) { var operand = node.expression.expression; // Make sure we consider all nested cast expressions, e.g.: // (<any><number><any>-A).x; while (operand.kind === 177 /* TypeAssertionExpression */ || operand.kind === 195 /* AsExpression */ || operand.kind === 196 /* NonNullExpression */) { operand = operand.expression; } // We have an expression of the form: (<Type>SubExpr) or (SubExpr as Type) // Emitting this as (SubExpr) is really not desirable. We would like to emit the subexpr as is. // Omitting the parentheses, however, could cause change in the semantics of the generated // code if the casted expression has a lower precedence than the rest of the expression, e.g.: // (<any>new A).foo should be emitted as (new A).foo and not new A.foo // (<any>typeof A).toString() should be emitted as (typeof A).toString() and not typeof A.toString() // new (<any>A()) should be emitted as new (A()) and not new A() // (<any>function foo() { })() should be emitted as an IIF (function foo(){})() and not declaration function foo(){} () if (operand.kind !== 185 /* PrefixUnaryExpression */ && operand.kind !== 183 /* VoidExpression */ && operand.kind !== 182 /* TypeOfExpression */ && operand.kind !== 181 /* DeleteExpression */ && operand.kind !== 186 /* PostfixUnaryExpression */ && operand.kind !== 175 /* NewExpression */ && !(operand.kind === 187 /* BinaryExpression */ && node.expression.kind === 195 /* AsExpression */) && !(operand.kind === 174 /* CallExpression */ && node.parent.kind === 175 /* NewExpression */) && !(operand.kind === 179 /* FunctionExpression */ && node.parent.kind === 174 /* CallExpression */) && !(operand.kind === 8 /* NumericLiteral */ && node.parent.kind === 172 /* PropertyAccessExpression */)) { emit(operand); return; } } } write("("); emit(node.expression); write(")"); } function emitDeleteExpression(node) { write(ts.tokenToString(78 /* DeleteKeyword */)); write(" "); emit(node.expression); } function emitVoidExpression(node) { write(ts.tokenToString(103 /* VoidKeyword */)); write(" "); emit(node.expression); } function emitTypeOfExpression(node) { write(ts.tokenToString(101 /* TypeOfKeyword */)); write(" "); emit(node.expression); } function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) { if (!isCurrentFileSystemExternalModule() || node.kind !== 69 /* Identifier */ || ts.nodeIsSynthesized(node)) { return false; } var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 /* VariableDeclaration */ || node.parent.kind === 169 /* BindingElement */); var targetDeclaration = isVariableDeclarationOrBindingElement ? node.parent : resolver.getReferencedValueDeclaration(node); return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, /*isExported*/ true); } function isNameOfExportedDeclarationInNonES6Module(node) { if (modulekind === ts.ModuleKind.System || node.kind !== 69 /* Identifier */ || ts.nodeIsSynthesized(node)) { return false; } if (exportEquals || !exportSpecifiers || !(node.text in exportSpecifiers)) { return false; } // check that referenced declaration is declared on source file level var declaration = resolver.getReferencedValueDeclaration(node); return declaration && ts.getEnclosingBlockScopeContainer(declaration).kind === 256 /* SourceFile */; } function emitPrefixUnaryExpression(node) { var isPlusPlusOrMinusMinus = (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */); var externalExportChanged = isPlusPlusOrMinusMinus && isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand); if (externalExportChanged) { // emit // ++x // as // exports('x', ++x) write(exportFunctionForFile + "(\""); emitNodeWithoutSourceMap(node.operand); write("\", "); } var internalExportChanged = isPlusPlusOrMinusMinus && isNameOfExportedDeclarationInNonES6Module(node.operand); if (internalExportChanged) { emitAliasEqual(node.operand); } write(ts.tokenToString(node.operator)); // In some cases, we need to emit a space between the operator and the operand. One obvious case // is when the operator is an identifier, like delete or typeof. We also need to do this for plus // and minus expressions in certain cases. Specifically, consider the following two cases (parens // are just for clarity of exposition, and not part of the source code): // // (+(+1)) // (+(++1)) // // We need to emit a space in both cases. In the first case, the absence of a space will make // the resulting expression a prefix increment operation. And in the second, it will make the resulting // expression a prefix increment whose operand is a plus expression - (++(+x)) // The same is true of minus of course. if (node.operand.kind === 185 /* PrefixUnaryExpression */) { var operand = node.operand; if (node.operator === 35 /* PlusToken */ && (operand.operator === 35 /* PlusToken */ || operand.operator === 41 /* PlusPlusToken */)) { write(" "); } else if (node.operator === 36 /* MinusToken */ && (operand.operator === 36 /* MinusToken */ || operand.operator === 42 /* MinusMinusToken */)) { write(" "); } } emit(node.operand); if (externalExportChanged) { write(")"); } } function emitPostfixUnaryExpression(node) { var externalExportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand); var internalExportChanged = isNameOfExportedDeclarationInNonES6Module(node.operand); if (externalExportChanged) { // export function returns the value that was passes as the second argument // however for postfix unary expressions result value should be the value before modification. // emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)' write("(" + exportFunctionForFile + "(\""); emitNodeWithoutSourceMap(node.operand); write("\", "); write(ts.tokenToString(node.operator)); emit(node.operand); if (node.operator === 41 /* PlusPlusToken */) { write(") - 1)"); } else { write(") + 1)"); } } else if (internalExportChanged) { emitAliasEqual(node.operand); emit(node.operand); if (node.operator === 41 /* PlusPlusToken */) { write(" += 1"); } else { write(" -= 1"); } } else { emit(node.operand); write(ts.tokenToString(node.operator)); } } function shouldHoistDeclarationInSystemJsModule(node) { return isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ false); } /* * Checks if given node is a source file level declaration (not nested in module/function). * If 'isExported' is true - then declaration must also be exported. * This function is used in two cases: * - check if node is a exported source file level value to determine * if we should also export the value after its it changed * - check if node is a source level declaration to emit it differently, * i.e non-exported variable statement 'var x = 1' is hoisted so * when we emit variable statement 'var' should be dropped. */ function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) { if (!node || !isCurrentFileSystemExternalModule()) { return false; } var current = ts.getRootDeclaration(node).parent; while (current) { if (current.kind === 256 /* SourceFile */) { return !isExported || ((ts.getCombinedNodeFlags(node) & 1 /* Export */) !== 0); } else if (ts.isDeclaration(current)) { return false; } else { current = current.parent; } } } /** * Emit ES7 exponentiation operator downlevel using Math.pow * @param node a binary expression node containing exponentiationOperator (**, **=) */ function emitExponentiationOperator(node) { var leftHandSideExpression = node.left; if (node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) { var synthesizedLHS = void 0; var shouldEmitParentheses = false; if (ts.isElementAccessExpression(leftHandSideExpression)) { shouldEmitParentheses = true; write("("); synthesizedLHS = ts.createSynthesizedNode(173 /* ElementAccessExpression */, /*startsOnNewLine*/ false); var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false); synthesizedLHS.expression = identifier; if (leftHandSideExpression.argumentExpression.kind !== 8 /* NumericLiteral */ && leftHandSideExpression.argumentExpression.kind !== 9 /* StringLiteral */) { var tempArgumentExpression = createAndRecordTempVariable(268435456 /* _i */); synthesizedLHS.argumentExpression = tempArgumentExpression; emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, /*shouldEmitCommaBeforeAssignment*/ true, leftHandSideExpression.expression); } else { synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression; } write(", "); } else if (ts.isPropertyAccessExpression(leftHandSideExpression)) { shouldEmitParentheses = true; write("("); synthesizedLHS = ts.createSynthesizedNode(172 /* PropertyAccessExpression */, /*startsOnNewLine*/ false); var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false); synthesizedLHS.expression = identifier; synthesizedLHS.name = leftHandSideExpression.name; write(", "); } emit(synthesizedLHS || leftHandSideExpression); write(" = "); write("Math.pow("); emit(synthesizedLHS || leftHandSideExpression); write(", "); emit(node.right); write(")"); if (shouldEmitParentheses) { write(")"); } } else { write("Math.pow("); emit(leftHandSideExpression); write(", "); emit(node.right); write(")"); } } function emitAliasEqual(name) { for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) { var specifier = _b[_a]; emitStart(specifier.name); emitContainingModuleName(specifier); if (languageVersion === 0 /* ES3 */ && name.text === "default") { write('["default"]'); } else { write("."); emitNodeWithCommentsAndWithoutSourcemap(specifier.name); } emitEnd(specifier.name); write(" = "); } return true; } function emitBinaryExpression(node) { if (languageVersion < 2 /* ES6 */ && node.operatorToken.kind === 56 /* EqualsToken */ && (node.left.kind === 171 /* ObjectLiteralExpression */ || node.left.kind === 170 /* ArrayLiteralExpression */)) { emitDestructuring(node, node.parent.kind === 202 /* ExpressionStatement */); } else { var isAssignment = ts.isAssignmentOperator(node.operatorToken.kind); var externalExportChanged = isAssignment && isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left); if (externalExportChanged) { // emit assignment 'x <op> y' as 'exports("x", x <op> y)' write(exportFunctionForFile + "(\""); emitNodeWithoutSourceMap(node.left); write("\", "); } var internalExportChanged = isAssignment && isNameOfExportedDeclarationInNonES6Module(node.left); if (internalExportChanged) { // export { foo } // emit foo = 2 as exports.foo = foo = 2 emitAliasEqual(node.left); } if (node.operatorToken.kind === 38 /* AsteriskAsteriskToken */ || node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) { // Downleveled emit exponentiation operator using Math.pow emitExponentiationOperator(node); } else { emit(node.left); // Add indentation before emit the operator if the operator is on different line // For example: // 3 // + 2; // emitted as // 3 // + 2; var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 /* CommaToken */ ? " " : undefined); write(ts.tokenToString(node.operatorToken.kind)); var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " "); emit(node.right); decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator); } if (externalExportChanged) { write(")"); } } } function synthesizedNodeStartsOnNewLine(node) { return ts.nodeIsSynthesized(node) && node.startsOnNewLine; } function emitConditionalExpression(node) { emit(node.condition); var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " "); write("?"); var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " "); emit(node.whenTrue); decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion); var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " "); write(":"); var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " "); emit(node.whenFalse); decreaseIndentIf(indentedBeforeColon, indentedAfterColon); } // Helper function to decrease the indent if we previously indented. Allows multiple // previous indent values to be considered at a time. This also allows caller to just // call this once, passing in all their appropriate indent values, instead of needing // to call this helper function multiple times. function decreaseIndentIf(value1, value2) { if (value1) { decreaseIndent(); } if (value2) { decreaseIndent(); } } function isSingleLineEmptyBlock(node) { if (node && node.kind === 199 /* Block */) { var block = node; return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block); } } function emitBlock(node) { if (isSingleLineEmptyBlock(node)) { emitToken(15 /* OpenBraceToken */, node.pos); write(" "); emitToken(16 /* CloseBraceToken */, node.statements.end); return; } emitToken(15 /* OpenBraceToken */, node.pos); increaseIndent(); if (node.kind === 226 /* ModuleBlock */) { ts.Debug.assert(node.parent.kind === 225 /* ModuleDeclaration */); emitCaptureThisForNodeIfNecessary(node.parent); } emitLines(node.statements); if (node.kind === 226 /* ModuleBlock */) { emitTempDeclarations(/*newLine*/ true); } decreaseIndent(); writeLine(); emitToken(16 /* CloseBraceToken */, node.statements.end); } function emitEmbeddedStatement(node) { if (node.kind === 199 /* Block */) { write(" "); emit(node); } else { increaseIndent(); writeLine(); emit(node); decreaseIndent(); } } function emitExpressionStatement(node) { emitParenthesizedIf(node.expression, /*parenthesized*/ node.expression.kind === 180 /* ArrowFunction */); write(";"); } function emitIfStatement(node) { var endPos = emitToken(88 /* IfKeyword */, node.pos); write(" "); endPos = emitToken(17 /* OpenParenToken */, endPos); emit(node.expression); emitToken(18 /* CloseParenToken */, node.expression.end); emitEmbeddedStatement(node.thenStatement); if (node.elseStatement) { writeLine(); emitToken(80 /* ElseKeyword */, node.thenStatement.end); if (node.elseStatement.kind === 203 /* IfStatement */) { write(" "); emit(node.elseStatement); } else { emitEmbeddedStatement(node.elseStatement); } } } function emitDoStatement(node) { emitLoop(node, emitDoStatementWorker); } function emitDoStatementWorker(node, loop) { write("do"); if (loop) { emitConvertedLoopCall(loop, /*emitAsBlock*/ true); } else { emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true); } if (node.statement.kind === 199 /* Block */) { write(" "); } else { writeLine(); } write("while ("); emit(node.expression); write(");"); } function emitWhileStatement(node) { emitLoop(node, emitWhileStatementWorker); } function emitWhileStatementWorker(node, loop) { write("while ("); emit(node.expression); write(")"); if (loop) { emitConvertedLoopCall(loop, /*emitAsBlock*/ true); } else { emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true); } } /** * Returns true if start of variable declaration list was emitted. * Returns false if nothing was written - this can happen for source file level variable declarations * in system modules where such variable declarations are hoisted. */ function tryEmitStartOfVariableDeclarationList(decl) { if (shouldHoistVariable(decl, /*checkIfSourceFileLevelDecl*/ true)) { // variables in variable declaration list were already hoisted return false; } if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072 /* BlockScoped */) === 0) { // we are inside a converted loop - this can only happen in downlevel scenarios // record names for all variable declarations for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) { var varDecl = _b[_a]; hoistVariableDeclarationFromLoop(convertedLoopState, varDecl); } return false; } emitStart(decl); if (decl && languageVersion >= 2 /* ES6 */) { if (ts.isLet(decl)) { write("let "); } else if (ts.isConst(decl)) { write("const "); } else { write("var "); } } else { write("var "); } // Note here we specifically dont emit end so that if we are going to emit binding pattern // we can alter the source map correctly return true; } function emitVariableDeclarationListSkippingUninitializedEntries(list) { var started = false; for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) { var decl = _b[_a]; if (!decl.initializer) { continue; } if (!started) { started = true; } else { write(", "); } emit(decl); } return started; } function shouldConvertLoopBody(node) { return languageVersion < 2 /* ES6 */ && (resolver.getNodeCheckFlags(node) & 65536 /* LoopWithCapturedBlockScopedBinding */) !== 0; } function emitLoop(node, loopEmitter) { var shouldConvert = shouldConvertLoopBody(node); if (!shouldConvert) { loopEmitter(node, /* convertedLoop*/ undefined); } else { var loop = convertLoopBody(node); if (node.parent.kind === 214 /* LabeledStatement */) { // if parent of the loop was labeled statement - attach the label to loop skipping converted loop body emitLabelAndColon(node.parent); } loopEmitter(node, loop); } } function convertLoopBody(node) { var functionName = makeUniqueName("_loop"); var loopInitializer; switch (node.kind) { case 206 /* ForStatement */: case 207 /* ForInStatement */: case 208 /* ForOfStatement */: var initializer = node.initializer; if (initializer && initializer.kind === 219 /* VariableDeclarationList */) { loopInitializer = node.initializer; } break; } var loopParameters; var loopOutParameters; if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072 /* BlockScoped */)) { // if loop initializer contains block scoped variables - they should be passed to converted loop body as parameters loopParameters = []; for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) { var varDeclaration = _b[_a]; processVariableDeclaration(varDeclaration.name); } } var bodyIsBlock = node.statement.kind === 199 /* Block */; var paramList = loopParameters ? loopParameters.join(", ") : ""; writeLine(); write("var " + functionName + " = function(" + paramList + ")"); var convertedOuterLoopState = convertedLoopState; convertedLoopState = { loopOutParameters: loopOutParameters }; if (convertedOuterLoopState) { // convertedOuterLoopState !== undefined means that this converted loop is nested in another converted loop. // if outer converted loop has already accumulated some state - pass it through if (convertedOuterLoopState.argumentsName) { // outer loop has already used 'arguments' so we've already have some name to alias it // use the same name in all nested loops convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName; } if (convertedOuterLoopState.thisName) { // outer loop has already used 'this' so we've already have some name to alias it // use the same name in all nested loops convertedLoopState.thisName = convertedOuterLoopState.thisName; } if (convertedOuterLoopState.hoistedLocalVariables) { // we've already collected some non-block scoped variable declarations in enclosing loop // use the same storage in nested loop convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables; } } write(" {"); writeLine(); increaseIndent(); if (bodyIsBlock) { emitLines(node.statement.statements); } else { emit(node.statement); } writeLine(); // end of loop body -> copy out parameter copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ true); decreaseIndent(); writeLine(); write("};"); writeLine(); if (loopOutParameters) { // declare variables to hold out params for loop body write("var "); for (var i = 0; i < loopOutParameters.length; i++) { if (i !== 0) { write(", "); } write(loopOutParameters[i].outParamName); } write(";"); writeLine(); } if (convertedLoopState.argumentsName) { // if alias for arguments is set if (convertedOuterLoopState) { // pass it to outer converted loop convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName; } else { // this is top level converted loop and we need to create an alias for 'arguments' object write("var " + convertedLoopState.argumentsName + " = arguments;"); writeLine(); } } if (convertedLoopState.thisName) { // if alias for this is set if (convertedOuterLoopState) { // pass it to outer converted loop convertedOuterLoopState.thisName = convertedLoopState.thisName; } else { // this is top level converted loop so we need to create an alias for 'this' here // NOTE: // if converted loops were all nested in arrow function then we'll always emit '_this' so convertedLoopState.thisName will not be set. // If it is set this means that all nested loops are not nested in arrow function and it is safe to capture 'this'. write("var " + convertedLoopState.thisName + " = this;"); writeLine(); } } if (convertedLoopState.hoistedLocalVariables) { // if hoistedLocalVariables !== undefined this means that we've possibly collected some variable declarations to be hoisted later if (convertedOuterLoopState) { // pass them to outer converted loop convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables; } else { // deduplicate and hoist collected variable declarations write("var "); var seen = void 0; for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) { var id = _d[_c]; // Don't initialize seen unless we have at least one element. // Emit a comma to separate for all but the first element. if (!seen) { seen = ts.createMap(); } else { write(", "); } if (!(id.text in seen)) { emit(id); seen[id.text] = id.text; } } write(";"); writeLine(); } } var currentLoopState = convertedLoopState; convertedLoopState = convertedOuterLoopState; return { functionName: functionName, paramList: paramList, state: currentLoopState }; function processVariableDeclaration(name) { if (name.kind === 69 /* Identifier */) { var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name) ? getGeneratedNameForNode(name) : name.text; loopParameters.push(nameText); if (resolver.getNodeCheckFlags(name.parent) & 2097152 /* NeedsLoopOutParameter */) { var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) }; (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable); } } else { for (var _a = 0, _b = name.elements; _a < _b.length; _a++) { var element = _b[_a]; processVariableDeclaration(element.name); } } } } function emitNormalLoopBody(node, emitAsEmbeddedStatement) { var saveAllowedNonLabeledJumps; if (convertedLoopState) { // we get here if we are trying to emit normal loop loop inside converted loop // set allowedNonLabeledJumps to Break | Continue to mark that break\continue inside the loop should be emitted as is saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps; convertedLoopState.allowedNonLabeledJumps = 2 /* Break */ | 4 /* Continue */; } if (emitAsEmbeddedStatement) { emitEmbeddedStatement(node.statement); } else if (node.statement.kind === 199 /* Block */) { emitLines(node.statement.statements); } else { writeLine(); emit(node.statement); } if (convertedLoopState) { convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps; } } function copyLoopOutParameters(state, copyDirection, emitAsStatements) { if (state.loopOutParameters) { for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) { var outParam = _b[_a]; if (copyDirection === 0 /* ToOriginal */) { emitIdentifier(outParam.originalName); write(" = " + outParam.outParamName); } else { write(outParam.outParamName + " = "); emitIdentifier(outParam.originalName); } if (emitAsStatements) { write(";"); writeLine(); } else { write(", "); } } } } function emitConvertedLoopCall(loop, emitAsBlock) { if (emitAsBlock) { write(" {"); writeLine(); increaseIndent(); } // loop is considered simple if it does not have any return statements or break\continue that transfer control outside of the loop // simple loops are emitted as just 'loop()'; // NOTE: if loop uses only 'continue' it still will be emitted as simple loop var isSimpleLoop = !(loop.state.nonLocalJumps & ~4 /* Continue */) && !loop.state.labeledNonLocalBreaks && !loop.state.labeledNonLocalContinues; var loopResult = makeUniqueName("state"); if (!isSimpleLoop) { write("var " + loopResult + " = "); } write(loop.functionName + "(" + loop.paramList + ");"); writeLine(); copyLoopOutParameters(loop.state, 0 /* ToOriginal */, /*emitAsStatements*/ true); if (!isSimpleLoop) { // for non simple loops we need to store result returned from converted loop function and use it to do dispatching // converted loop function can return: // - object - used when body of the converted loop contains return statement. Property "value" of this object stores retuned value // - string - used to dispatch jumps. "break" and "continue" are used to non-labeled jumps, other values are used to transfer control to // different labels writeLine(); if (loop.state.nonLocalJumps & 8 /* Return */) { write("if (typeof " + loopResult + " === \"object\") "); if (convertedLoopState) { // we are currently nested in another converted loop - return unwrapped result write("return " + loopResult + ";"); // propagate 'hasReturn' flag to outer loop convertedLoopState.nonLocalJumps |= 8 /* Return */; } else { // top level converted loop - return unwrapped value write("return " + loopResult + ".value;"); } writeLine(); } if (loop.state.nonLocalJumps & 2 /* Break */) { write("if (" + loopResult + " === \"break\") break;"); writeLine(); } // in case of labeled breaks emit code that either breaks to some known label inside outer loop or delegates jump decision to outer loop emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState); } if (emitAsBlock) { writeLine(); decreaseIndent(); write("}"); } function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) { if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) { return; } write("switch(" + loopResultVariable + ") {"); increaseIndent(); emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, /*isBreak*/ true, loopResultVariable, outerLoop); emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, /*isBreak*/ false, loopResultVariable, outerLoop); decreaseIndent(); writeLine(); write("}"); } function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) { if (!table) { return; } for (var labelText in table) { var labelMarker = table[labelText]; writeLine(); write("case \"" + labelMarker + "\": "); // if there are no outer converted loop or outer label in question is located inside outer converted loop // then emit labeled break\continue // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) { if (isBreak) { write("break "); } else { write("continue "); } write(labelText + ";"); } else { setLabeledJump(outerLoop, isBreak, labelText, labelMarker); write("return " + loopResultVariable + ";"); } } } } function emitForStatement(node) { emitLoop(node, emitForStatementWorker); } function emitForStatementWorker(node, loop) { var endPos = emitToken(86 /* ForKeyword */, node.pos); write(" "); endPos = emitToken(17 /* OpenParenToken */, endPos); if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) { var variableDeclarationList = node.initializer; var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList); if (startIsEmitted) { emitCommaList(variableDeclarationList.declarations); } else { emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList); } } else if (node.initializer) { emit(node.initializer); } write(";"); emitOptional(" ", node.condition); write(";"); emitOptional(" ", node.incrementor); write(")"); if (loop) { emitConvertedLoopCall(loop, /*emitAsBlock*/ true); } else { emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true); } } function emitForInOrForOfStatement(node) { if (languageVersion < 2 /* ES6 */ && node.kind === 208 /* ForOfStatement */) { emitLoop(node, emitDownLevelForOfStatementWorker); } else { emitLoop(node, emitForInOrForOfStatementWorker); } } function emitForInOrForOfStatementWorker(node, loop) { var endPos = emitToken(86 /* ForKeyword */, node.pos); write(" "); endPos = emitToken(17 /* OpenParenToken */, endPos); if (node.initializer.kind === 219 /* VariableDeclarationList */) { var variableDeclarationList = node.initializer; if (variableDeclarationList.declarations.length >= 1) { tryEmitStartOfVariableDeclarationList(variableDeclarationList); emit(variableDeclarationList.declarations[0]); } } else { emit(node.initializer); } if (node.kind === 207 /* ForInStatement */) { write(" in "); } else { write(" of "); } emit(node.expression); emitToken(18 /* CloseParenToken */, node.expression.end); if (loop) { emitConvertedLoopCall(loop, /*emitAsBlock*/ true); } else { emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true); } } function emitDownLevelForOfStatementWorker(node, loop) { // The following ES6 code: // // for (let v of expr) { } // // should be emitted as // // for (let _i = 0, _a = expr; _i < _a.length; _i++) { // let v = _a[_i]; // } // // where _a and _i are temps emitted to capture the RHS and the counter, // respectively. // When the left hand side is an expression instead of a let declaration, // the "let v" is not emitted. // When the left hand side is a let/const, the v is renamed if there is // another v in scope. // Note that all assignments to the LHS are emitted in the body, including // all destructuring. // Note also that because an extra statement is needed to assign to the LHS, // for-of bodies are always emitted as blocks. var endPos = emitToken(86 /* ForKeyword */, node.pos); write(" "); endPos = emitToken(17 /* OpenParenToken */, endPos); // Do not emit the LHS let declaration yet, because it might contain destructuring. // Do not call recordTempDeclaration because we are declaring the temps // right here. Recording means they will be declared later. // In the case where the user wrote an identifier as the RHS, like this: // // for (let v of arr) { } // // we can't reuse 'arr' because it might be modified within the body of the loop. var counter = createTempVariable(268435456 /* _i */); var rhsReference = ts.createSynthesizedNode(69 /* Identifier */); rhsReference.text = node.expression.kind === 69 /* Identifier */ ? makeUniqueName(node.expression.text) : makeTempVariableName(0 /* Auto */); // This is the let keyword for the counter and rhsReference. The let keyword for // the LHS will be emitted inside the body. emitStart(node.expression); write("var "); // _i = 0 emitNodeWithoutSourceMap(counter); write(" = 0"); emitEnd(node.expression); // , _a = expr write(", "); emitStart(node.expression); emitNodeWithoutSourceMap(rhsReference); write(" = "); emitNodeWithoutSourceMap(node.expression); emitEnd(node.expression); write("; "); // _i < _a.length; emitStart(node.expression); emitNodeWithoutSourceMap(counter); write(" < "); emitNodeWithCommentsAndWithoutSourcemap(rhsReference); write(".length"); emitEnd(node.expression); write("; "); // _i++) emitStart(node.expression); emitNodeWithoutSourceMap(counter); write("++"); emitEnd(node.expression); emitToken(18 /* CloseParenToken */, node.expression.end); // Body write(" {"); writeLine(); increaseIndent(); // Initialize LHS // let v = _a[_i]; var rhsIterationValue = createElementAccessExpression(rhsReference, counter); emitStart(node.initializer); if (node.initializer.kind === 219 /* VariableDeclarationList */) { write("var "); var variableDeclarationList = node.initializer; if (variableDeclarationList.declarations.length > 0) { var declaration = variableDeclarationList.declarations[0]; if (ts.isBindingPattern(declaration.name)) { // This works whether the declaration is a var, let, or const. // It will use rhsIterationValue _a[_i] as the initializer. emitDestructuring(declaration, /*isAssignmentExpressionStatement*/ false, rhsIterationValue); } else { // The following call does not include the initializer, so we have // to emit it separately. emitNodeWithCommentsAndWithoutSourcemap(declaration); write(" = "); emitNodeWithoutSourceMap(rhsIterationValue); } } else { // It's an empty declaration list. This can only happen in an error case, if the user wrote // for (let of []) {} emitNodeWithoutSourceMap(createTempVariable(0 /* Auto */)); write(" = "); emitNodeWithoutSourceMap(rhsIterationValue); } } else { // Initializer is an expression. Emit the expression in the body, so that it's // evaluated on every iteration. var assignmentExpression = createBinaryExpression(node.initializer, 56 /* EqualsToken */, rhsIterationValue, /*startsOnNewLine*/ false); if (node.initializer.kind === 170 /* ArrayLiteralExpression */ || node.initializer.kind === 171 /* ObjectLiteralExpression */) { // This is a destructuring pattern, so call emitDestructuring instead of emit. Calling emit will not work, because it will cause // the BinaryExpression to be passed in instead of the expression statement, which will cause emitDestructuring to crash. emitDestructuring(assignmentExpression, /*isAssignmentExpressionStatement*/ true, /*value*/ undefined); } else { emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression); } } emitEnd(node.initializer); write(";"); if (loop) { writeLine(); emitConvertedLoopCall(loop, /*emitAsBlock*/ false); } else { emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ false); } writeLine(); decreaseIndent(); write("}"); } function emitBreakOrContinueStatement(node) { if (convertedLoopState) { // check if we can emit break\continue as is // it is possible if either // - break\continue is statement labeled and label is located inside the converted loop // - break\continue is non-labeled and located in non-converted loop\switch statement var jump = node.kind === 210 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */; var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) || (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump)); if (!canUseBreakOrContinue) { write("return "); // explicit exit from loop -> copy out parameters copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ false); if (!node.label) { if (node.kind === 210 /* BreakStatement */) { convertedLoopState.nonLocalJumps |= 2 /* Break */; write("\"break\";"); } else { convertedLoopState.nonLocalJumps |= 4 /* Continue */; // note: return value is emitted only to simplify debugging, call to converted loop body does not do any dispatching on it. write("\"continue\";"); } } else { var labelMarker = void 0; if (node.kind === 210 /* BreakStatement */) { labelMarker = "break-" + node.label.text; setLabeledJump(convertedLoopState, /*isBreak*/ true, node.label.text, labelMarker); } else { labelMarker = "continue-" + node.label.text; setLabeledJump(convertedLoopState, /*isBreak*/ false, node.label.text, labelMarker); } write("\"" + labelMarker + "\";"); } return; } } emitToken(node.kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */, node.pos); emitOptional(" ", node.label); write(";"); } function emitReturnStatement(node) { if (convertedLoopState) { convertedLoopState.nonLocalJumps |= 8 /* Return */; write("return { value: "); if (node.expression) { emit(node.expression); } else { write("void 0"); } write(" };"); return; } emitToken(94 /* ReturnKeyword */, node.pos); emitOptional(" ", node.expression); write(";"); } function emitWithStatement(node) { write("with ("); emit(node.expression); write(")"); emitEmbeddedStatement(node.statement); } function emitSwitchStatement(node) { var endPos = emitToken(96 /* SwitchKeyword */, node.pos); write(" "); emitToken(17 /* OpenParenToken */, endPos); emit(node.expression); endPos = emitToken(18 /* CloseParenToken */, node.expression.end); write(" "); var saveAllowedNonLabeledJumps; if (convertedLoopState) { saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps; // for switch statement allow only non-labeled break convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */; } emitCaseBlock(node.caseBlock, endPos); if (convertedLoopState) { convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps; } } function emitCaseBlock(node, startPos) { emitToken(15 /* OpenBraceToken */, startPos); increaseIndent(); emitLines(node.clauses); decreaseIndent(); writeLine(); emitToken(16 /* CloseBraceToken */, node.clauses.end); } function nodeStartPositionsAreOnSameLine(node1, node2) { return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) === ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos)); } function nodeEndPositionsAreOnSameLine(node1, node2) { return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) === ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end); } function nodeEndIsOnSameLineAsNodeStart(node1, node2) { return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) === ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos)); } function emitCaseOrDefaultClause(node) { if (node.kind === 249 /* CaseClause */) { write("case "); emit(node.expression); write(":"); } else { write("default:"); } if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) { write(" "); emit(node.statements[0]); } else { increaseIndent(); emitLines(node.statements); decreaseIndent(); } } function emitThrowStatement(node) { write("throw "); emit(node.expression); write(";"); } function emitTryStatement(node) { write("try "); emit(node.tryBlock); emit(node.catchClause); if (node.finallyBlock) { writeLine(); write("finally "); emit(node.finallyBlock); } } function emitCatchClause(node) { writeLine(); var endPos = emitToken(72 /* CatchKeyword */, node.pos); write(" "); emitToken(17 /* OpenParenToken */, endPos); emit(node.variableDeclaration); emitToken(18 /* CloseParenToken */, node.variableDeclaration ? node.variableDeclaration.end : endPos); write(" "); emitBlock(node.block); } function emitDebuggerStatement(node) { emitToken(76 /* DebuggerKeyword */, node.pos); write(";"); } function emitLabelAndColon(node) { emit(node.label); write(": "); } function emitLabeledStatement(node) { if (!ts.isIterationStatement(node.statement, /* lookInLabeledStatements */ false) || !shouldConvertLoopBody(node.statement)) { emitLabelAndColon(node); } if (convertedLoopState) { if (!convertedLoopState.labels) { convertedLoopState.labels = ts.createMap(); } convertedLoopState.labels[node.label.text] = node.label.text; } emit(node.statement); if (convertedLoopState) { convertedLoopState.labels[node.label.text] = undefined; } } function getContainingModule(node) { do { node = node.parent; } while (node && node.kind !== 225 /* ModuleDeclaration */); return node; } function emitContainingModuleName(node) { var container = getContainingModule(node); write(container ? getGeneratedNameForNode(container) : "exports"); } function emitModuleMemberName(node) { emitStart(node.name); if (ts.getCombinedNodeFlags(node) & 1 /* Export */) { var container = getContainingModule(node); if (container) { write(getGeneratedNameForNode(container)); write("."); } else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) { write("exports."); } } emitNodeWithCommentsAndWithoutSourcemap(node.name); emitEnd(node.name); } function createVoidZero() { var zero = ts.createSynthesizedNode(8 /* NumericLiteral */); zero.text = "0"; var result = ts.createSynthesizedNode(183 /* VoidExpression */); result.expression = zero; return result; } function emitEs6ExportDefaultCompat(node) { if (node.parent.kind === 256 /* SourceFile */) { ts.Debug.assert(!!(node.flags & 512 /* Default */) || node.kind === 235 /* ExportAssignment */); // only allow export default at a source file level if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) { if (!isEs6Module) { if (languageVersion !== 0 /* ES3 */) { // default value of configurable, enumerable, writable are `false`. write('Object.defineProperty(exports, "__esModule", { value: true });'); writeLine(); } else { write("exports.__esModule = true;"); writeLine(); } } } } } function emitExportMemberAssignment(node) { if (node.flags & 1 /* Export */) { writeLine(); emitStart(node); // emit call to exporter only for top level nodes if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) { // emit export default <smth> as // export("default", <smth>) write(exportFunctionForFile + "(\""); if (node.flags & 512 /* Default */) { write("default"); } else { emitNodeWithCommentsAndWithoutSourcemap(node.name); } write("\", "); emitDeclarationName(node); write(")"); } else { if (node.flags & 512 /* Default */) { emitEs6ExportDefaultCompat(node); if (languageVersion === 0 /* ES3 */) { write('exports["default"]'); } else { write("exports.default"); } } else { emitModuleMemberName(node); } write(" = "); emitDeclarationName(node); } emitEnd(node); write(";"); } } function emitExportMemberAssignments(name) { if (modulekind === ts.ModuleKind.System) { return; } if (!exportEquals && exportSpecifiers && name.text in exportSpecifiers) { for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) { var specifier = _b[_a]; writeLine(); emitStart(specifier.name); emitContainingModuleName(specifier); write("."); emitNodeWithCommentsAndWithoutSourcemap(specifier.name); emitEnd(specifier.name); write(" = "); emitExpressionIdentifier(name); write(";"); } } } function emitExportSpecifierInSystemModule(specifier) { ts.Debug.assert(modulekind === ts.ModuleKind.System); if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) { return; } writeLine(); emitStart(specifier.name); write(exportFunctionForFile + "(\""); emitNodeWithCommentsAndWithoutSourcemap(specifier.name); write("\", "); emitExpressionIdentifier(specifier.propertyName || specifier.name); write(")"); emitEnd(specifier.name); write(";"); } /** * Emit an assignment to a given identifier, 'name', with a given expression, 'value'. * @param name an identifier as a left-hand-side operand of the assignment * @param value an expression as a right-hand-side operand of the assignment * @param shouldEmitCommaBeforeAssignment a boolean indicating whether to prefix an assignment with comma */ function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) { if (shouldEmitCommaBeforeAssignment) { write(", "); } var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name); if (exportChanged) { write(exportFunctionForFile + "(\""); emitNodeWithCommentsAndWithoutSourcemap(name); write("\", "); } var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 /* VariableDeclaration */ || name.parent.kind === 169 /* BindingElement */); // If this is first var declaration, we need to start at var/let/const keyword instead // otherwise use nodeForSourceMap as the start position emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap); withTemporaryNoSourceMap(function () { if (isVariableDeclarationOrBindingElement) { emitModuleMemberName(name.parent); } else { emit(name); } write(" = "); emit(value); }); emitEnd(nodeForSourceMap, /*stopOverridingSpan*/ true); if (exportChanged) { write(")"); } } /** * Create temporary variable, emit an assignment of the variable the given expression * @param expression an expression to assign to the newly created temporary variable * @param canDefineTempVariablesInPlace a boolean indicating whether you can define the temporary variable at an assignment location * @param shouldEmitCommaBeforeAssignment a boolean indicating whether an assignment should prefix with comma */ function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) { var identifier = createTempVariable(0 /* Auto */); if (!canDefineTempVariablesInPlace) { recordTempDeclaration(identifier); } emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent); return identifier; } function isFirstVariableDeclaration(root) { return root.kind === 218 /* VariableDeclaration */ && root.parent.kind === 219 /* VariableDeclarationList */ && root.parent.declarations[0] === root; } function emitDestructuring(root, isAssignmentExpressionStatement, value) { var emitCount = 0; // An exported declaration is actually emitted as an assignment (to a property on the module object), so // temporary variables in an exported declaration need to have real declarations elsewhere // Also temporary variables should be explicitly allocated for source level declarations when module target is system // because actual variable declarations are hoisted var canDefineTempVariablesInPlace = false; if (root.kind === 218 /* VariableDeclaration */) { var isExported = ts.getCombinedNodeFlags(root) & 1 /* Export */; var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root); canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind; } else if (root.kind === 142 /* Parameter */) { canDefineTempVariablesInPlace = true; } if (root.kind === 187 /* BinaryExpression */) { emitAssignmentExpression(root); } else { ts.Debug.assert(!isAssignmentExpressionStatement); // If first variable declaration of variable statement correct the start location if (isFirstVariableDeclaration(root)) { // Use emit location of "var " as next emit start entry sourceMap.changeEmitSourcePos(); } emitBindingElement(root, value); } /** * Ensures that there exists a declared identifier whose value holds the given expression. * This function is useful to ensure that the expression's value can be read from in subsequent expressions. * Unless 'reuseIdentifierExpressions' is false, 'expr' will be returned if it is just an identifier. * * @param expr the expression whose value needs to be bound. * @param reuseIdentifierExpressions true if identifier expressions can simply be returned; * false if it is necessary to always emit an identifier. */ function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) { if (expr.kind === 69 /* Identifier */ && reuseIdentifierExpressions) { return expr; } var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode); emitCount++; return identifier; } function createDefaultValueCheck(value, defaultValue, sourceMapNode) { // The value expression will be evaluated twice, so for anything but a simple identifier // we need to generate a temporary variable // If the temporary variable needs to be emitted use the source Map node for assignment of that statement value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode); // Return the expression 'value === void 0 ? defaultValue : value' var equals = ts.createSynthesizedNode(187 /* BinaryExpression */); equals.left = value; equals.operatorToken = ts.createSynthesizedNode(32 /* EqualsEqualsEqualsToken */); equals.right = createVoidZero(); return createConditionalExpression(equals, defaultValue, value); } function createConditionalExpression(condition, whenTrue, whenFalse) { var cond = ts.createSynthesizedNode(188 /* ConditionalExpression */); cond.condition = condition; cond.questionToken = ts.createSynthesizedNode(53 /* QuestionToken */); cond.whenTrue = whenTrue; cond.colonToken = ts.createSynthesizedNode(54 /* ColonToken */); cond.whenFalse = whenFalse; return cond; } function createNumericLiteral(value) { var node = ts.createSynthesizedNode(8 /* NumericLiteral */); node.text = "" + value; return node; } function createPropertyAccessForDestructuringProperty(object, propName) { var index; var nameIsComputed = propName.kind === 140 /* ComputedPropertyName */; if (nameIsComputed) { // TODO to handle when we look into sourcemaps for computed properties, for now use propName index = ensureIdentifier(propName.expression, /*reuseIdentifierExpressions*/ false, propName); } else { // We create a synthetic copy of the identifier in order to avoid the rewriting that might // otherwise occur when the identifier is emitted. index = ts.createSynthesizedNode(propName.kind); // We need to unescape identifier here because when parsing an identifier prefixing with "__" // the parser need to append "_" in order to escape colliding with magic identifiers such as "__proto__" // Therefore, in order to correctly emit identifiers that are written in original TypeScript file, // we will unescapeIdentifier to remove additional underscore (if no underscore is added, the function will return original input string) index.text = ts.unescapeIdentifier(propName.text); } return !nameIsComputed && index.kind === 69 /* Identifier */ ? createPropertyAccessExpression(object, index) : createElementAccessExpression(object, index); } function createSliceCall(value, sliceIndex) { var call = ts.createSynthesizedNode(174 /* CallExpression */); var sliceIdentifier = ts.createSynthesizedNode(69 /* Identifier */); sliceIdentifier.text = "slice"; call.expression = createPropertyAccessExpression(value, sliceIdentifier); call.arguments = ts.createSynthesizedNodeArray(); call.arguments[0] = createNumericLiteral(sliceIndex); return call; } function emitObjectLiteralAssignment(target, value, sourceMapNode) { var properties = target.properties; if (properties.length !== 1) { // For anything but a single element destructuring we need to generate a temporary // to ensure value is evaluated exactly once. // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode); } for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) { var p = properties_5[_a]; if (p.kind === 253 /* PropertyAssignment */ || p.kind === 254 /* ShorthandPropertyAssignment */) { var propName = p.name; var target_1 = p.kind === 254 /* ShorthandPropertyAssignment */ ? p : p.initializer || propName; // Assignment for target = value.propName should highlight whole property, hence use p as source map node emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p); } } } function emitArrayLiteralAssignment(target, value, sourceMapNode) { var elements = target.elements; if (elements.length !== 1) { // For anything but a single element destructuring we need to generate a temporary // to ensure value is evaluated exactly once. // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode); } for (var i = 0; i < elements.length; i++) { var e = elements[i]; if (e.kind !== 193 /* OmittedExpression */) { // Assignment for target = value.propName should highlight whole property, hence use e as source map node if (e.kind !== 191 /* SpreadElementExpression */) { emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e); } else if (i === elements.length - 1) { emitDestructuringAssignment(e.expression, createSliceCall(value, i), e); } } } } function emitDestructuringAssignment(target, value, sourceMapNode) { // When emitting target = value use source map node to highlight, including any temporary assignments needed for this if (target.kind === 254 /* ShorthandPropertyAssignment */) { if (target.objectAssignmentInitializer) { value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode); } target = target.name; } else if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) { value = createDefaultValueCheck(value, target.right, sourceMapNode); target = target.left; } if (target.kind === 171 /* ObjectLiteralExpression */) { emitObjectLiteralAssignment(target, value, sourceMapNode); } else if (target.kind === 170 /* ArrayLiteralExpression */) { emitArrayLiteralAssignment(target, value, sourceMapNode); } else { emitAssignment(target, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, sourceMapNode); emitCount++; } } function emitAssignmentExpression(root) { var target = root.left; var value = root.right; if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) { emit(value); } else if (isAssignmentExpressionStatement) { // Source map node for root.left = root.right is root // but if root is synthetic, which could be in below case, use the target which is { a } // for ({a} of {a: string}) { // } emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root); } else { if (root.parent.kind !== 178 /* ParenthesizedExpression */) { write("("); } // Temporary assignment needed to emit root should highlight whole binary expression value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, root); // Source map node for root.left = root.right is root emitDestructuringAssignment(target, value, root); write(", "); emit(value); if (root.parent.kind !== 178 /* ParenthesizedExpression */) { write(")"); } } } function emitBindingElement(target, value) { // Any temporary assignments needed to emit target = value should point to target if (target.initializer) { // Combine value and initializer value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer; } else if (!value) { // Use 'void 0' in absence of value and initializer value = createVoidZero(); } if (ts.isBindingPattern(target.name)) { var pattern = target.name; var elements = pattern.elements; var numElements = elements.length; if (numElements !== 1) { // For anything other than a single-element destructuring we need to generate a temporary // to ensure value is evaluated exactly once. Additionally, if we have zero elements // we need to emit *something* to ensure that in case a 'var' keyword was already emitted, // so in that case, we'll intentionally create that temporary. value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ numElements !== 0, target); } for (var i = 0; i < numElements; i++) { var element = elements[i]; if (pattern.kind === 167 /* ObjectBindingPattern */) { // Rewrite element to a declaration with an initializer that fetches property var propName = element.propertyName || element.name; emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName)); } else if (element.kind !== 193 /* OmittedExpression */) { if (!element.dotDotDotToken) { // Rewrite element to a declaration that accesses array element at index i emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i))); } else if (i === numElements - 1) { emitBindingElement(element, createSliceCall(value, i)); } } } } else { emitAssignment(target.name, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, target); emitCount++; } } } function emitVariableDeclaration(node) { if (ts.isBindingPattern(node.name)) { var isExported = ts.getCombinedNodeFlags(node) & 1 /* Export */; if (languageVersion >= 2 /* ES6 */ && (!isExported || modulekind === ts.ModuleKind.ES6)) { // emit ES6 destructuring only if target module is ES6 or variable is not exported // exported variables in CJS/AMD are prefixed with 'exports.' so result javascript { exports.toString } = 1; is illegal var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System && shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true); if (isTopLevelDeclarationInSystemModule) { // In System modules top level variables are hoisted // so variable declarations with destructuring are turned into destructuring assignments. // As a result, they will need parentheses to disambiguate object binding assignments from blocks. write("("); } emit(node.name); emitOptional(" = ", node.initializer); if (isTopLevelDeclarationInSystemModule) { write(")"); } } else { emitDestructuring(node, /*isAssignmentExpressionStatement*/ false); } } else { var initializer = node.initializer; if (!initializer && languageVersion < 2 /* ES6 */ && // for names - binding patterns that lack initializer there is no point to emit explicit initializer // since downlevel codegen for destructuring will fail in the absence of initializer so all binding elements will say uninitialized node.name.kind === 69 /* Identifier */) { var container = ts.getEnclosingBlockScopeContainer(node); var flags = resolver.getNodeCheckFlags(node); // nested let bindings might need to be initialized explicitly to preserve ES6 semantic // { let x = 1; } // { let x; } // x here should be undefined. not 1 // NOTES: // Top level bindings never collide with anything and thus don't require explicit initialization. // As for nested let bindings there are two cases: // - nested let bindings that were not renamed definitely should be initialized explicitly // { let x = 1; } // { let x; if (some-condition) { x = 1}; if (x) { /*1*/ } } // Without explicit initialization code in /*1*/ can be executed even if some-condition is evaluated to false // - renaming introduces fresh name that should not collide with any existing names, however renamed bindings sometimes also should be // explicitly initialized. One particular case: non-captured binding declared inside loop body (but not in loop initializer) // let x; // for (;;) { // let x; // } // in downlevel codegen inner 'x' will be renamed so it won't collide with outer 'x' however it will should be reset on every iteration // as if it was declared anew. // * Why non-captured binding - because if loop contains block scoped binding captured in some function then loop body will be rewritten // to have a fresh scope on every iteration so everything will just work. // * Why loop initializer is excluded - since we've introduced a fresh name it already will be undefined. var isCapturedInFunction = flags & 131072 /* CapturedBlockScopedBinding */; var isDeclaredInLoop = flags & 262144 /* BlockScopedBindingInLoop */; var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) || (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false)); var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 /* Let */ && !emittedAsTopLevel; var emitExplicitInitializer = emittedAsNestedLetDeclaration && container.kind !== 207 /* ForInStatement */ && container.kind !== 208 /* ForOfStatement */ && (!resolver.isDeclarationWithCollidingName(node) || (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, /*lookInLabeledStatements*/ false))); if (emitExplicitInitializer) { initializer = createVoidZero(); } } var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name); if (exportChanged) { write(exportFunctionForFile + "(\""); emitNodeWithCommentsAndWithoutSourcemap(node.name); write("\", "); } emitModuleMemberName(node); emitOptional(" = ", initializer); if (exportChanged) { write(")"); } } } function emitExportVariableAssignments(node) { if (node.kind === 193 /* OmittedExpression */) { return; } var name = node.name; if (name.kind === 69 /* Identifier */) { emitExportMemberAssignments(name); } else if (ts.isBindingPattern(name)) { ts.forEach(name.elements, emitExportVariableAssignments); } } function isES6ExportedDeclaration(node) { return !!(node.flags & 1 /* Export */) && modulekind === ts.ModuleKind.ES6 && node.parent.kind === 256 /* SourceFile */; } function emitVariableStatement(node) { var startIsEmitted = false; if (node.flags & 1 /* Export */) { if (isES6ExportedDeclaration(node)) { // Exported ES6 module member write("export "); startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList); } } else { startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList); } if (startIsEmitted) { emitCommaList(node.declarationList.declarations); write(";"); } else { var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList); if (atLeastOneItem) { write(";"); } } if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) { ts.forEach(node.declarationList.declarations, emitExportVariableAssignments); } } function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) { // If we're not exporting the variables, there's nothing special here. // Always emit comments for these nodes. if (!(node.flags & 1 /* Export */)) { return true; } // If we are exporting, but it's a top-level ES6 module exports, // we'll emit the declaration list verbatim, so emit comments too. if (isES6ExportedDeclaration(node)) { return true; } // Otherwise, only emit if we have at least one initializer present. for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) { var declaration = _b[_a]; if (declaration.initializer) { return true; } } return false; } function emitParameter(node) { if (languageVersion < 2 /* ES6 */) { if (ts.isBindingPattern(node.name)) { var name_29 = createTempVariable(0 /* Auto */); if (!tempParameters) { tempParameters = []; } tempParameters.push(name_29); emit(name_29); } else { emit(node.name); } } else { if (node.dotDotDotToken) { write("..."); } emit(node.name); emitOptional(" = ", node.initializer); } } function emitDefaultValueAssignments(node) { if (languageVersion < 2 /* ES6 */) { var tempIndex_1 = 0; ts.forEach(node.parameters, function (parameter) { // A rest parameter cannot have a binding pattern or an initializer, // so let's just ignore it. if (parameter.dotDotDotToken) { return; } var paramName = parameter.name, initializer = parameter.initializer; if (ts.isBindingPattern(paramName)) { // In cases where a binding pattern is simply '[]' or '{}', // we usually don't want to emit a var declaration; however, in the presence // of an initializer, we must emit that expression to preserve side effects. var hasBindingElements = paramName.elements.length > 0; if (hasBindingElements || initializer) { writeLine(); write("var "); if (hasBindingElements) { emitDestructuring(parameter, /*isAssignmentExpressionStatement*/ false, tempParameters[tempIndex_1]); } else { emit(tempParameters[tempIndex_1]); write(" = "); emit(initializer); } write(";"); } // Regardless of whether we will emit a var declaration for the binding pattern, we generate the temporary // variable for the parameter (see: emitParameter) tempIndex_1++; } else if (initializer) { writeLine(); emitStart(parameter); write("if ("); emitNodeWithoutSourceMap(paramName); write(" === void 0)"); emitEnd(parameter); write(" { "); emitStart(parameter); emitNodeWithCommentsAndWithoutSourcemap(paramName); write(" = "); emitNodeWithCommentsAndWithoutSourcemap(initializer); emitEnd(parameter); write("; }"); } }); } } function emitRestParameter(node) { if (languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node)) { var restParam = node.parameters[node.parameters.length - 1]; // A rest parameter cannot have a binding pattern, so let's just ignore it if it does. if (ts.isBindingPattern(restParam.name)) { return; } var skipThisCount = node.parameters.length && node.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */ ? 1 : 0; var restIndex = node.parameters.length - 1 - skipThisCount; var tempName = createTempVariable(268435456 /* _i */).text; writeLine(); emitLeadingComments(restParam); emitStart(restParam); write("var "); emitNodeWithCommentsAndWithoutSourcemap(restParam.name); write(" = [];"); emitEnd(restParam); emitTrailingComments(restParam); writeLine(); write("for ("); emitStart(restParam); write("var " + tempName + " = " + restIndex + ";"); emitEnd(restParam); write(" "); emitStart(restParam); write(tempName + " < arguments.length;"); emitEnd(restParam); write(" "); emitStart(restParam); write(tempName + "++"); emitEnd(restParam); write(") {"); increaseIndent(); writeLine(); emitStart(restParam); emitNodeWithCommentsAndWithoutSourcemap(restParam.name); write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];"); emitEnd(restParam); decreaseIndent(); writeLine(); write("}"); } } function emitAccessor(node) { write(node.kind === 149 /* GetAccessor */ ? "get " : "set "); emit(node.name); emitSignatureAndBody(node); } function shouldEmitAsArrowFunction(node) { return node.kind === 180 /* ArrowFunction */ && languageVersion >= 2 /* ES6 */; } function emitDeclarationName(node) { if (node.name) { emitNodeWithCommentsAndWithoutSourcemap(node.name); } else { write(getGeneratedNameForNode(node)); } } function shouldEmitFunctionName(node) { if (node.kind === 179 /* FunctionExpression */) { // Emit name if one is present return !!node.name; } if (node.kind === 220 /* FunctionDeclaration */) { // Emit name if one is present, or emit generated name in down-level case (for export default case) return !!node.name || modulekind !== ts.ModuleKind.ES6; } } function emitFunctionDeclaration(node) { if (ts.nodeIsMissing(node.body)) { return emitCommentsOnNotEmittedNode(node); } // TODO (yuisu) : we should not have special cases to condition emitting comments // but have one place to fix check for these conditions. var kind = node.kind, parent = node.parent; if (kind !== 147 /* MethodDeclaration */ && kind !== 146 /* MethodSignature */ && parent && parent.kind !== 253 /* PropertyAssignment */ && parent.kind !== 174 /* CallExpression */ && parent.kind !== 170 /* ArrayLiteralExpression */) { // 1. Methods will emit comments at their assignment declaration sites. // // 2. If the function is a property of object literal, emitting leading-comments // is done by emitNodeWithoutSourceMap which then call this function. // In particular, we would like to avoid emit comments twice in following case: // // var obj = { // id: // /*comment*/ () => void // } // // 3. If the function is an argument in call expression, emitting of comments will be // taken care of in emit list of arguments inside of 'emitCallExpression'. // // 4. If the function is in an array literal, 'emitLinePreservingList' will take care // of leading comments. emitLeadingComments(node); } emitStart(node); // For targeting below es6, emit functions-like declaration including arrow function using function keyword. // When targeting ES6, emit arrow function natively in ES6 by omitting function keyword and using fat arrow instead if (!shouldEmitAsArrowFunction(node)) { if (isES6ExportedDeclaration(node)) { write("export "); if (node.flags & 512 /* Default */) { write("default "); } } write("function"); if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) { write("*"); } write(" "); } if (shouldEmitFunctionName(node)) { emitDeclarationName(node); } emitSignatureAndBody(node); if (modulekind !== ts.ModuleKind.ES6 && kind === 220 /* FunctionDeclaration */ && parent === currentSourceFile && node.name) { emitExportMemberAssignments(node.name); } emitEnd(node); if (kind !== 147 /* MethodDeclaration */ && kind !== 146 /* MethodSignature */ && kind !== 180 /* ArrowFunction */) { emitTrailingComments(node); } } function emitCaptureThisForNodeIfNecessary(node) { if (resolver.getNodeCheckFlags(node) & 4 /* CaptureThis */) { writeLine(); emitStart(node); write("var _this = this;"); emitEnd(node); } } function emitSignatureParameters(node) { increaseIndent(); write("("); if (node) { var parameters = node.parameters; var skipCount = node.parameters.length && node.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */ ? 1 : 0; var omitCount = languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node) ? 1 : 0; emitList(parameters, skipCount, parameters.length - omitCount - skipCount, /*multiLine*/ false, /*trailingComma*/ false); } write(")"); decreaseIndent(); } function emitSignatureParametersForArrow(node) { // Check whether the parameter list needs parentheses and preserve no-parenthesis if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) { emit(node.parameters[0]); return; } emitSignatureParameters(node); } function emitAsyncFunctionBodyForES6(node) { var promiseConstructor = ts.getEntityNameFromTypeNode(node.type); var isArrowFunction = node.kind === 180 /* ArrowFunction */; var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0; // An async function is emit as an outer function that calls an inner // generator function. To preserve lexical bindings, we pass the current // `this` and `arguments` objects to `__awaiter`. The generator function // passed to `__awaiter` is executed inside of the callback to the // promise constructor. // // The emit for an async arrow without a lexical `arguments` binding might be: // // // input // let a = async (b) => { await b; } // // // output // let a = (b) => __awaiter(this, void 0, void 0, function* () { // yield b; // }); // // The emit for an async arrow with a lexical `arguments` binding might be: // // // input // let a = async (b) => { await arguments[0]; } // // // output // let a = (b) => __awaiter(this, arguments, void 0, function* (arguments) { // yield arguments[0]; // }); // // The emit for an async function expression without a lexical `arguments` binding // might be: // // // input // let a = async function (b) { // await b; // } // // // output // let a = function (b) { // return __awaiter(this, void 0, void 0, function* () { // yield b; // }); // } // // The emit for an async function expression with a lexical `arguments` binding // might be: // // // input // let a = async function (b) { // await arguments[0]; // } // // // output // let a = function (b) { // return __awaiter(this, arguments, void 0, function* (_arguments) { // yield _arguments[0]; // }); // } // // The emit for an async function expression with a lexical `arguments` binding // and a return type annotation might be: // // // input // let a = async function (b): MyPromise<any> { // await arguments[0]; // } // // // output // let a = function (b) { // return __awaiter(this, arguments, MyPromise, function* (_arguments) { // yield _arguments[0]; // }); // } // // If this is not an async arrow, emit the opening brace of the function body // and the start of the return statement. if (!isArrowFunction) { write(" {"); increaseIndent(); writeLine(); if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) { writeLines("\nconst _super = (function (geti, seti) {\n const cache = Object.create(null);\n return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);"); writeLine(); } else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) { write("const _super = name => super[name];"); writeLine(); } write("return"); } write(" __awaiter(this"); if (hasLexicalArguments) { write(", arguments, "); } else { write(", void 0, "); } if (languageVersion >= 2 /* ES6 */ || !promiseConstructor) { write("void 0"); } else { emitEntityNameAsExpression(promiseConstructor, /*useFallback*/ false); } // Emit the call to __awaiter. write(", function* ()"); // Emit the signature and body for the inner generator function. emitFunctionBody(node); write(")"); // If this is not an async arrow, emit the closing brace of the outer function body. if (!isArrowFunction) { write(";"); decreaseIndent(); writeLine(); write("}"); } } function emitFunctionBody(node) { if (!node.body) { // There can be no body when there are parse errors. Just emit an empty block // in that case. write(" { }"); } else { if (node.body.kind === 199 /* Block */) { emitBlockFunctionBody(node, node.body); } else { emitExpressionFunctionBody(node, node.body); } } } function emitSignatureAndBody(node) { var saveConvertedLoopState = convertedLoopState; var saveTempFlags = tempFlags; var saveTempVariables = tempVariables; var saveTempParameters = tempParameters; convertedLoopState = undefined; tempFlags = 0; tempVariables = undefined; tempParameters = undefined; // When targeting ES6, emit arrow function natively in ES6 if (shouldEmitAsArrowFunction(node)) { emitSignatureParametersForArrow(node); write(" =>"); } else { emitSignatureParameters(node); } var isAsync = ts.isAsyncFunctionLike(node); if (isAsync) { emitAsyncFunctionBodyForES6(node); } else { emitFunctionBody(node); } if (!isES6ExportedDeclaration(node)) { emitExportMemberAssignment(node); } ts.Debug.assert(convertedLoopState === undefined); convertedLoopState = saveConvertedLoopState; tempFlags = saveTempFlags; tempVariables = saveTempVariables; tempParameters = saveTempParameters; } // Returns true if any preamble code was emitted. function emitFunctionBodyPreamble(node) { emitCaptureThisForNodeIfNecessary(node); emitDefaultValueAssignments(node); emitRestParameter(node); } function emitExpressionFunctionBody(node, body) { if (languageVersion < 2 /* ES6 */ || node.flags & 256 /* Async */) { emitDownLevelExpressionFunctionBody(node, body); return; } // For es6 and higher we can emit the expression as is. However, in the case // where the expression might end up looking like a block when emitted, we'll // also wrap it in parentheses first. For example if you have: a => <foo>{} // then we need to generate: a => ({}) write(" "); // Unwrap all type assertions. var current = body; while (current.kind === 177 /* TypeAssertionExpression */) { current = current.expression; } emitParenthesizedIf(body, current.kind === 171 /* ObjectLiteralExpression */); } function emitDownLevelExpressionFunctionBody(node, body) { write(" {"); increaseIndent(); var outPos = writer.getTextPos(); emitDetachedCommentsAndUpdateCommentsInfo(node.body); emitFunctionBodyPreamble(node); var preambleEmitted = writer.getTextPos() !== outPos; decreaseIndent(); // If we didn't have to emit any preamble code, then attempt to keep the arrow // function on one line. if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) { write(" "); emitStart(body); write("return "); emit(body); emitEnd(body); write(";"); emitTempDeclarations(/*newLine*/ false); write(" "); } else { increaseIndent(); writeLine(); emitLeadingComments(node.body); emitStart(body); write("return "); emit(body); emitEnd(body); write(";"); emitTrailingComments(node.body); emitTempDeclarations(/*newLine*/ true); decreaseIndent(); writeLine(); } emitStart(node.body); write("}"); emitEnd(node.body); } function emitBlockFunctionBody(node, body) { write(" {"); var initialTextPos = writer.getTextPos(); increaseIndent(); emitDetachedCommentsAndUpdateCommentsInfo(body.statements); // Emit all the directive prologues (like "use strict"). These have to come before // any other preamble code we write (like parameter initializers). var startIndex = emitDirectivePrologues(body.statements, /*startWithNewLine*/ true); emitFunctionBodyPreamble(node); decreaseIndent(); var preambleEmitted = writer.getTextPos() !== initialTextPos; if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) { for (var _a = 0, _b = body.statements; _a < _b.length; _a++) { var statement = _b[_a]; write(" "); emit(statement); } emitTempDeclarations(/*newLine*/ false); write(" "); emitLeadingCommentsOfPosition(body.statements.end); } else { increaseIndent(); emitLinesStartingAt(body.statements, startIndex); emitTempDeclarations(/*newLine*/ true); writeLine(); emitLeadingCommentsOfPosition(body.statements.end); decreaseIndent(); } emitToken(16 /* CloseBraceToken */, body.statements.end); } /** * Return the statement at a given index if it is a super-call statement * @param ctor a constructor declaration * @param index an index to constructor's body to check */ function getSuperCallAtGivenIndex(ctor, index) { if (!ctor.body) { return undefined; } var statements = ctor.body.statements; if (!statements || index >= statements.length) { return undefined; } var statement = statements[index]; if (statement.kind === 202 /* ExpressionStatement */) { return ts.isSuperCallExpression(statement.expression) ? statement : undefined; } } function emitParameterPropertyAssignments(node) { ts.forEach(node.parameters, function (param) { if (param.flags & 92 /* ParameterPropertyModifier */) { writeLine(); emitStart(param); emitStart(param.name); write("this."); emitNodeWithoutSourceMap(param.name); emitEnd(param.name); write(" = "); emit(param.name); write(";"); emitEnd(param); } }); } function emitMemberAccessForPropertyName(memberName) { // This does not emit source map because it is emitted by caller as caller // is aware how the property name changes to the property access // eg. public x = 10; becomes this.x and static x = 10 becomes className.x if (memberName.kind === 9 /* StringLiteral */ || memberName.kind === 8 /* NumericLiteral */) { write("["); emitNodeWithCommentsAndWithoutSourcemap(memberName); write("]"); } else if (memberName.kind === 140 /* ComputedPropertyName */) { emitComputedPropertyName(memberName); } else { write("."); emitNodeWithCommentsAndWithoutSourcemap(memberName); } } function getInitializedProperties(node, isStatic) { var properties = []; for (var _a = 0, _b = node.members; _a < _b.length; _a++) { var member = _b[_a]; if (member.kind === 145 /* PropertyDeclaration */ && isStatic === ((member.flags & 32 /* Static */) !== 0) && member.initializer) { properties.push(member); } } return properties; } function emitPropertyDeclarations(node, properties) { for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) { var property = properties_6[_a]; emitPropertyDeclaration(node, property); } } function emitPropertyDeclaration(node, property, receiver, isExpression) { writeLine(); emitLeadingComments(property); emitStart(property); emitStart(property.name); if (receiver) { write(receiver); } else { if (property.flags & 32 /* Static */) { emitDeclarationName(node); } else { write("this"); } } emitMemberAccessForPropertyName(property.name); emitEnd(property.name); write(" = "); emit(property.initializer); if (!isExpression) { write(";"); } emitEnd(property); emitTrailingComments(property); } function emitMemberFunctionsForES5AndLower(node) { ts.forEach(node.members, function (member) { if (member.kind === 198 /* SemicolonClassElement */) { writeLine(); write(";"); } else if (member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) { if (!member.body) { return emitCommentsOnNotEmittedNode(member); } writeLine(); emitLeadingComments(member); emitStart(member); emitStart(member.name); emitClassMemberPrefix(node, member); emitMemberAccessForPropertyName(member.name); emitEnd(member.name); write(" = "); emitFunctionDeclaration(member); emitEnd(member); write(";"); emitTrailingComments(member); } else if (member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */) { var accessors = ts.getAllAccessorDeclarations(node.members, member); if (member === accessors.firstAccessor) { writeLine(); emitStart(member); write("Object.defineProperty("); emitStart(member.name); emitClassMemberPrefix(node, member); write(", "); emitExpressionForPropertyName(member.name); emitEnd(member.name); write(", {"); increaseIndent(); if (accessors.getAccessor) { writeLine(); emitLeadingComments(accessors.getAccessor); write("get: "); emitStart(accessors.getAccessor); write("function "); emitSignatureAndBody(accessors.getAccessor); emitEnd(accessors.getAccessor); emitTrailingComments(accessors.getAccessor); write(","); } if (accessors.setAccessor) { writeLine(); emitLeadingComments(accessors.setAccessor); write("set: "); emitStart(accessors.setAccessor); write("function "); emitSignatureAndBody(accessors.setAccessor); emitEnd(accessors.setAccessor); emitTrailingComments(accessors.setAccessor); write(","); } writeLine(); write("enumerable: true,"); writeLine(); write("configurable: true"); decreaseIndent(); writeLine(); write("});"); emitEnd(member); } } }); } function emitMemberFunctionsForES6AndHigher(node) { for (var _a = 0, _b = node.members; _a < _b.length; _a++) { var member = _b[_a]; if ((member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) && !member.body) { emitCommentsOnNotEmittedNode(member); } else if (member.kind === 147 /* MethodDeclaration */ || member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */) { writeLine(); emitLeadingComments(member); emitStart(member); if (member.flags & 32 /* Static */) { write("static "); } if (member.kind === 149 /* GetAccessor */) { write("get "); } else if (member.kind === 150 /* SetAccessor */) { write("set "); } if (member.asteriskToken) { write("*"); } emit(member.name); emitSignatureAndBody(member); emitEnd(member); emitTrailingComments(member); } else if (member.kind === 198 /* SemicolonClassElement */) { writeLine(); write(";"); } } } function emitConstructor(node, baseTypeElement) { var saveConvertedLoopState = convertedLoopState; var saveTempFlags = tempFlags; var saveTempVariables = tempVariables; var saveTempParameters = tempParameters; convertedLoopState = undefined; tempFlags = 0; tempVariables = undefined; tempParameters = undefined; emitConstructorWorker(node, baseTypeElement); ts.Debug.assert(convertedLoopState === undefined); convertedLoopState = saveConvertedLoopState; tempFlags = saveTempFlags; tempVariables = saveTempVariables; tempParameters = saveTempParameters; } function emitConstructorWorker(node, baseTypeElement) { // Check if we have property assignment inside class declaration. // If there is property assignment, we need to emit constructor whether users define it or not // If there is no property assignment, we can omit constructor if users do not define it var hasInstancePropertyWithInitializer = false; // Emit the constructor overload pinned comments ts.forEach(node.members, function (member) { if (member.kind === 148 /* Constructor */ && !member.body) { emitCommentsOnNotEmittedNode(member); } // Check if there is any non-static property assignment if (member.kind === 145 /* PropertyDeclaration */ && member.initializer && (member.flags & 32 /* Static */) === 0) { hasInstancePropertyWithInitializer = true; } }); var ctor = ts.getFirstConstructorWithBody(node); // For target ES6 and above, if there is no user-defined constructor and there is no property assignment // do not emit constructor in class declaration. if (languageVersion >= 2 /* ES6 */ && !ctor && !hasInstancePropertyWithInitializer) { return; } if (ctor) { emitLeadingComments(ctor); } emitStart(ctor || node); if (languageVersion < 2 /* ES6 */) { write("function "); emitDeclarationName(node); emitSignatureParameters(ctor); } else { write("constructor"); if (ctor) { emitSignatureParameters(ctor); } else { // The ES2015 spec specifies in 14.5.14. Runtime Semantics: ClassDefinitionEvaluation: // If constructor is empty, then // If ClassHeritag_eopt is present and protoParent is not null, then // Let constructor be the result of parsing the source text // constructor(...args) { super (...args);} // using the syntactic grammar with the goal symbol MethodDefinition[~Yield]. // Else, // Let constructor be the result of parsing the source text // constructor( ){ } // using the syntactic grammar with the goal symbol MethodDefinition[~Yield]. // // While we could emit the '...args' rest parameter, certain later tools in the pipeline might // downlevel the '...args' portion less efficiently by naively copying the contents of 'arguments' to an array. // Instead, we'll avoid using a rest parameter and spread into the super call as // 'super(...arguments)' instead of 'super(...args)', as you can see below. write("()"); } } var startIndex = 0; write(" {"); increaseIndent(); if (ctor) { // Emit all the directive prologues (like "use strict"). These have to come before // any other preamble code we write (like parameter initializers). startIndex = emitDirectivePrologues(ctor.body.statements, /*startWithNewLine*/ true); emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements); } emitCaptureThisForNodeIfNecessary(node); var superCall; if (ctor) { emitDefaultValueAssignments(ctor); emitRestParameter(ctor); if (baseTypeElement) { superCall = getSuperCallAtGivenIndex(ctor, startIndex); if (superCall) { writeLine(); emit(superCall); } } emitParameterPropertyAssignments(ctor); } else { if (baseTypeElement) { writeLine(); emitStart(baseTypeElement); if (languageVersion < 2 /* ES6 */) { write("_super.apply(this, arguments);"); } else { // See comment above on using '...arguments' instead of '...args'. write("super(...arguments);"); } emitEnd(baseTypeElement); } } emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ false)); if (ctor) { var statements = ctor.body.statements; if (superCall) { statements = statements.slice(1); } emitLinesStartingAt(statements, startIndex); } emitTempDeclarations(/*newLine*/ true); writeLine(); if (ctor) { emitLeadingCommentsOfPosition(ctor.body.statements.end); } decreaseIndent(); emitToken(16 /* CloseBraceToken */, ctor ? ctor.body.statements.end : node.members.end); emitEnd(ctor || node); if (ctor) { emitTrailingComments(ctor); } } function emitClassExpression(node) { return emitClassLikeDeclaration(node); } function emitClassDeclaration(node) { return emitClassLikeDeclaration(node); } function emitClassLikeDeclaration(node) { if (languageVersion < 2 /* ES6 */) { emitClassLikeDeclarationBelowES6(node); } else { emitClassLikeDeclarationForES6AndHigher(node); } if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) { emitExportMemberAssignments(node.name); } } function emitClassLikeDeclarationForES6AndHigher(node) { var decoratedClassAlias; var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node); var isDecorated = ts.nodeIsDecorated(node); var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule; if (node.kind === 221 /* ClassDeclaration */) { if (rewriteAsClassExpression) { // When we emit an ES6 class that has a class decorator, we must tailor the // emit to certain specific cases. // // In the simplest case, we emit the class declaration as a let declaration, and // evaluate decorators after the close of the class body: // // TypeScript | Javascript // --------------------------------|------------------------------------ // @dec | let C = class C { // class C { | } // } | C = __decorate([dec], C); // --------------------------------|------------------------------------ // @dec | export let C = class C { // export class C { | } // } | C = __decorate([dec], C); // --------------------------------------------------------------------- // [Example 1] // // If a class declaration contains a reference to itself *inside* of the class body, // this introduces two bindings to the class: One outside of the class body, and one // inside of the class body. If we apply decorators as in [Example 1] above, there // is the possibility that the decorator `dec` will return a new value for the // constructor, which would result in the binding inside of the class no longer // pointing to the same reference as the binding outside of the class. // // As a result, we must instead rewrite all references to the class *inside* of the // class body to instead point to a local temporary alias for the class: // // TypeScript | Javascript // --------------------------------|------------------------------------ // @dec | let C_1 = class C { // class C { | static x() { return C_1.y; } // static x() { return C.y; } | } // static y = 1; | let C = C_1; // } | C.y = 1; // | C = C_1 = __decorate([dec], C); // --------------------------------|------------------------------------ // @dec | let C_1 = class C { // export class C { | static x() { return C_1.y; } // static x() { return C.y; } | } // static y = 1; | export let C = C_1; // } | C.y = 1; // | C = C_1 = __decorate([dec], C); // --------------------------------------------------------------------- // [Example 2] // // If a class declaration is the default export of a module, we instead emit // the export after the decorated declaration: // // TypeScript | Javascript // --------------------------------|------------------------------------ // @dec | let default_1 = class { // export default class { | } // } | default_1 = __decorate([dec], default_1); // | export default default_1; // --------------------------------|------------------------------------ // @dec | let C = class C { // export default class { | } // } | C = __decorate([dec], C); // | export default C; // --------------------------------------------------------------------- // [Example 3] // // If the class declaration is the default export and a reference to itself // inside of the class body, we must emit both an alias for the class *and* // move the export after the declaration: // // TypeScript | Javascript // --------------------------------|------------------------------------ // @dec | let C_1 = class C { // export default class C { | static x() { return C_1.y; } // static x() { return C.y; } | }; // static y = 1; | let C = C_1; // } | C.y = 1; // | C = C_1 = __decorate([dec], C); // | export default C; // --------------------------------------------------------------------- // [Example 4] // // NOTE: we reuse the same rewriting logic for cases when targeting ES6 and module kind is System. // Because of hoisting top level class declaration need to be emitted as class expressions. // Double bind case is only required if node is decorated. if (isDecorated && resolver.getNodeCheckFlags(node) & 524288 /* ClassWithBodyScopedClassBinding */) { decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default")); decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias; } if (isES6ExportedDeclaration(node) && !(node.flags & 512 /* Default */) && decoratedClassAlias === undefined) { write("export "); } if (decoratedClassAlias !== undefined) { write("let " + decoratedClassAlias); } else { if (!isHoistedDeclarationInSystemModule) { write("let "); } emitDeclarationName(node); } write(" = "); } else if (isES6ExportedDeclaration(node)) { write("export "); if (node.flags & 512 /* Default */) { write("default "); } } } // If the class has static properties, and it's a class expression, then we'll need // to specialize the emit a bit. for a class expression of the form: // // (class C { static a = 1; static b = 2; ... }) // // We'll emit: // // ((C_1 = class C { // // Normal class body // }, // C_1.a = 1, // C_1.b = 2, // C_1)); // var C_1; // // This keeps the expression as an expression, while ensuring that the static parts // of it have been initialized by the time it is used. var staticProperties = getInitializedProperties(node, /*isStatic*/ true); var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192 /* ClassExpression */; var generatedName; if (isClassExpressionWithStaticProperties) { generatedName = node.name ? getGeneratedNameForNode(node.name) : makeUniqueName("classExpression"); var synthesizedNode = ts.createSynthesizedNode(69 /* Identifier */); synthesizedNode.text = generatedName; recordTempDeclaration(synthesizedNode); write("("); increaseIndent(); emit(synthesizedNode); write(" = "); } write("class"); // emit name if // - node has a name // - this is default export with static initializers if (node.name || (node.flags & 512 /* Default */ && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) { write(" "); emitDeclarationName(node); } var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node); if (baseTypeNode) { write(" extends "); emit(baseTypeNode.expression); } write(" {"); increaseIndent(); writeLine(); emitConstructor(node, baseTypeNode); emitMemberFunctionsForES6AndHigher(node); decreaseIndent(); writeLine(); emitToken(16 /* CloseBraceToken */, node.members.end); if (rewriteAsClassExpression) { if (decoratedClassAlias !== undefined) { write(";"); writeLine(); if (isES6ExportedDeclaration(node) && !(node.flags & 512 /* Default */)) { write("export "); } write("let "); emitDeclarationName(node); write(" = " + decoratedClassAlias); } decoratedClassAliases[ts.getNodeId(node)] = undefined; write(";"); } // Emit static property assignment. Because classDeclaration is lexically evaluated, // it is safe to emit static property assignment after classDeclaration // From ES6 specification: // HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using // a lexical declaration such as a LexicalDeclaration or a ClassDeclaration. if (isClassExpressionWithStaticProperties) { for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) { var property = staticProperties_1[_a]; write(","); writeLine(); emitPropertyDeclaration(node, property, /*receiver*/ generatedName, /*isExpression*/ true); } write(","); writeLine(); write(generatedName); decreaseIndent(); write(")"); } else { writeLine(); emitPropertyDeclarations(node, staticProperties); emitDecoratorsOfClass(node, decoratedClassAlias); } if (!(node.flags & 1 /* Export */)) { return; } if (modulekind !== ts.ModuleKind.ES6) { emitExportMemberAssignment(node); } else { // If this is an exported class, but not on the top level (i.e. on an internal // module), export it if (node.flags & 512 /* Default */) { // if this is a top level default export of decorated class, write the export after the declaration. if (isDecorated) { writeLine(); write("export default "); emitDeclarationName(node); write(";"); } } else if (node.parent.kind !== 256 /* SourceFile */) { writeLine(); emitStart(node); emitModuleMemberName(node); write(" = "); emitDeclarationName(node); emitEnd(node); write(";"); } } } function emitClassLikeDeclarationBelowES6(node) { var isES6ExportedClass = isES6ExportedDeclaration(node); if (node.kind === 221 /* ClassDeclaration */) { if (isES6ExportedClass && !(node.flags & 512 /* Default */)) { write("export "); } // source file level classes in system modules are hoisted so 'var's for them are already defined if (!shouldHoistDeclarationInSystemJsModule(node)) { write("var "); } emitDeclarationName(node); write(" = "); } write("(function ("); var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node); if (baseTypeNode) { write("_super"); } write(") {"); var saveTempFlags = tempFlags; var saveTempVariables = tempVariables; var saveTempParameters = tempParameters; var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames; var saveConvertedLoopState = convertedLoopState; convertedLoopState = undefined; tempFlags = 0; tempVariables = undefined; tempParameters = undefined; computedPropertyNamesToGeneratedNames = undefined; increaseIndent(); if (baseTypeNode) { writeLine(); emitStart(baseTypeNode); write("__extends("); emitDeclarationName(node); write(", _super);"); emitEnd(baseTypeNode); } writeLine(); emitConstructor(node, baseTypeNode); emitMemberFunctionsForES5AndLower(node); emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ true)); writeLine(); emitDecoratorsOfClass(node, /*decoratedClassAlias*/ undefined); writeLine(); emitToken(16 /* CloseBraceToken */, node.members.end, function () { write("return "); emitDeclarationName(node); }); write(";"); emitTempDeclarations(/*newLine*/ true); ts.Debug.assert(convertedLoopState === undefined); convertedLoopState = saveConvertedLoopState; tempFlags = saveTempFlags; tempVariables = saveTempVariables; tempParameters = saveTempParameters; computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames; decreaseIndent(); writeLine(); emitToken(16 /* CloseBraceToken */, node.members.end); emitStart(node); write("("); if (baseTypeNode) { emit(baseTypeNode.expression); } write("))"); if (node.kind === 221 /* ClassDeclaration */) { write(";"); } emitEnd(node); if (node.kind === 221 /* ClassDeclaration */ && !isES6ExportedClass) { emitExportMemberAssignment(node); } else if (isES6ExportedClass && (node.flags & 512 /* Default */)) { writeLine(); write("export default "); emitDeclarationName(node); write(";"); } } function emitClassMemberPrefix(node, member) { emitDeclarationName(node); if (!(member.flags & 32 /* Static */)) { write(".prototype"); } } function emitDecoratorsOfClass(node, decoratedClassAlias) { emitDecoratorsOfMembers(node, /*staticFlag*/ 0); emitDecoratorsOfMembers(node, 32 /* Static */); emitDecoratorsOfConstructor(node, decoratedClassAlias); } function emitDecoratorsOfConstructor(node, decoratedClassAlias) { var decorators = node.decorators; var constructor = ts.getFirstConstructorWithBody(node); var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; }); // skip decoration of the constructor if neither it nor its parameters are decorated if (!decorators && !firstParameterDecorator) { return; } // Emit the call to __decorate. Given the class: // // @dec // class C { // } // // The emit for the class is: // // C = __decorate([dec], C); // writeLine(); emitStart(node.decorators || firstParameterDecorator); emitDeclarationName(node); if (decoratedClassAlias !== undefined) { write(" = " + decoratedClassAlias); } write(" = __decorate(["); increaseIndent(); writeLine(); var decoratorCount = decorators ? decorators.length : 0; var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); }); if (firstParameterDecorator) { argumentsWritten += emitDecoratorsOfParameters(constructor, /*leadingComma*/ argumentsWritten > 0); } emitSerializedTypeMetadata(node, /*leadingComma*/ argumentsWritten >= 0); decreaseIndent(); writeLine(); write("], "); emitDeclarationName(node); write(")"); emitEnd(node.decorators || firstParameterDecorator); write(";"); writeLine(); } function emitDecoratorsOfMembers(node, staticFlag) { for (var _a = 0, _b = node.members; _a < _b.length; _a++) { var member = _b[_a]; // only emit members in the correct group if ((member.flags & 32 /* Static */) !== staticFlag) { continue; } // skip members that cannot be decorated (such as the constructor) if (!ts.nodeCanBeDecorated(member)) { continue; } // skip an accessor declaration if it is not the first accessor var decorators = void 0; var functionLikeMember = void 0; if (ts.isAccessor(member)) { var accessors = ts.getAllAccessorDeclarations(node.members, member); if (member !== accessors.firstAccessor) { continue; } // get the decorators from the first accessor with decorators decorators = accessors.firstAccessor.decorators; if (!decorators && accessors.secondAccessor) { decorators = accessors.secondAccessor.decorators; } // we only decorate parameters of the set accessor functionLikeMember = accessors.setAccessor; } else { decorators = member.decorators; // we only decorate the parameters here if this is a method if (member.kind === 147 /* MethodDeclaration */) { functionLikeMember = member; } } var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; }); // skip a member if it or any of its parameters are not decorated if (!decorators && !firstParameterDecorator) { continue; } // Emit the call to __decorate. Given the following: // // class C { // @dec method(@dec2 x) {} // @dec get accessor() {} // @dec prop; // } // // The emit for a method is: // // __decorate([ // dec, // __param(0, dec2), // __metadata("design:type", Function), // __metadata("design:paramtypes", [Object]), // __metadata("design:returntype", void 0) // ], C.prototype, "method", undefined); // // The emit for an accessor is: // // __decorate([ // dec // ], C.prototype, "accessor", undefined); // // The emit for a property is: // // __decorate([ // dec // ], C.prototype, "prop"); // writeLine(); emitStart(decorators || firstParameterDecorator); write("__decorate(["); increaseIndent(); writeLine(); var decoratorCount = decorators ? decorators.length : 0; var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); }); if (firstParameterDecorator) { argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0); } emitSerializedTypeMetadata(member, argumentsWritten > 0); decreaseIndent(); writeLine(); write("], "); emitClassMemberPrefix(node, member); write(", "); emitExpressionForPropertyName(member.name); if (languageVersion > 0 /* ES3 */) { if (member.kind !== 145 /* PropertyDeclaration */) { // We emit `null` here to indicate to `__decorate` that it can invoke `Object.getOwnPropertyDescriptor` directly. // We have this extra argument here so that we can inject an explicit property descriptor at a later date. write(", null"); } else { // We emit `void 0` here to indicate to `__decorate` that it can invoke `Object.defineProperty` directly, but that it // should not invoke `Object.getOwnPropertyDescriptor`. write(", void 0"); } } write(")"); emitEnd(decorators || firstParameterDecorator); write(";"); writeLine(); } } function emitDecoratorsOfParameters(node, leadingComma) { var argumentsWritten = 0; if (node) { var parameterIndex_1 = 0; for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) { var parameter = _b[_a]; if (ts.nodeIsDecorated(parameter)) { var decorators = parameter.decorators; argumentsWritten += emitList(decorators, 0, decorators.length, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ leadingComma, /*noTrailingNewLine*/ true, function (decorator) { write("__param(" + parameterIndex_1 + ", "); emit(decorator.expression); write(")"); }); leadingComma = true; } parameterIndex_1++; } } return argumentsWritten; } function shouldEmitTypeMetadata(node) { // This method determines whether to emit the "design:type" metadata based on the node's kind. // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata // compiler option is set. switch (node.kind) { case 147 /* MethodDeclaration */: case 149 /* GetAccessor */: case 150 /* SetAccessor */: case 145 /* PropertyDeclaration */: return true; } return false; } function shouldEmitReturnTypeMetadata(node) { // This method determines whether to emit the "design:returntype" metadata based on the node's kind. // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata // compiler option is set. switch (node.kind) { case 147 /* MethodDeclaration */: return true; } return false; } function shouldEmitParamTypesMetadata(node) { // This method determines whether to emit the "design:paramtypes" metadata based on the node's kind. // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata // compiler option is set. switch (node.kind) { case 221 /* ClassDeclaration */: case 147 /* MethodDeclaration */: case 150 /* SetAccessor */: return true; } return false; } /** Serializes the type of a declaration to an appropriate JS constructor value. Used by the __metadata decorator for a class member. */ function emitSerializedTypeOfNode(node) { // serialization of the type of a declaration uses the following rules: // // * The serialized type of a ClassDeclaration is "Function" // * The serialized type of a ParameterDeclaration is the serialized type of its type annotation. // * The serialized type of a PropertyDeclaration is the serialized type of its type annotation. // * The serialized type of an AccessorDeclaration is the serialized type of the return type annotation of its getter or parameter type annotation of its setter. // * The serialized type of any other FunctionLikeDeclaration is "Function". // * The serialized type of any other node is "void 0". // // For rules on serializing type annotations, see `serializeTypeNode`. switch (node.kind) { case 221 /* ClassDeclaration */: write("Function"); return; case 145 /* PropertyDeclaration */: emitSerializedTypeNode(node.type); return; case 142 /* Parameter */: emitSerializedTypeNode(node.type); return; case 149 /* GetAccessor */: emitSerializedTypeNode(node.type); return; case 150 /* SetAccessor */: emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node)); return; } if (ts.isFunctionLike(node)) { write("Function"); return; } write("void 0"); } function emitSerializedTypeNode(node) { if (node) { switch (node.kind) { case 103 /* VoidKeyword */: write("void 0"); return; case 164 /* ParenthesizedType */: emitSerializedTypeNode(node.type); return; case 156 /* FunctionType */: case 157 /* ConstructorType */: write("Function"); return; case 160 /* ArrayType */: case 161 /* TupleType */: write("Array"); return; case 154 /* TypePredicate */: case 120 /* BooleanKeyword */: write("Boolean"); return; case 132 /* StringKeyword */: case 166 /* LiteralType */: write("String"); return; case 130 /* NumberKeyword */: write("Number"); return; case 133 /* SymbolKeyword */: write("Symbol"); return; case 155 /* TypeReference */: emitSerializedTypeReferenceNode(node); return; case 158 /* TypeQuery */: case 159 /* TypeLiteral */: case 162 /* UnionType */: case 163 /* IntersectionType */: case 117 /* AnyKeyword */: case 165 /* ThisType */: break; default: ts.Debug.fail("Cannot serialize unexpected type node."); break; } } write("Object"); } /** Serializes a TypeReferenceNode to an appropriate JS constructor value. Used by the __metadata decorator. */ function emitSerializedTypeReferenceNode(node) { var location = node.parent; while (ts.isDeclaration(location) || ts.isTypeNode(location)) { location = location.parent; } // Clone the type name and parent it to a location outside of the current declaration. var typeName = ts.cloneEntityName(node.typeName, location); var result = resolver.getTypeReferenceSerializationKind(typeName); switch (result) { case ts.TypeReferenceSerializationKind.Unknown: var temp = createAndRecordTempVariable(0 /* Auto */); write("(typeof ("); emitNodeWithoutSourceMap(temp); write(" = "); emitEntityNameAsExpression(typeName, /*useFallback*/ true); write(") === 'function' && "); emitNodeWithoutSourceMap(temp); write(") || Object"); break; case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue: emitEntityNameAsExpression(typeName, /*useFallback*/ false); break; case ts.TypeReferenceSerializationKind.VoidType: write("void 0"); break; case ts.TypeReferenceSerializationKind.BooleanType: write("Boolean"); break; case ts.TypeReferenceSerializationKind.NumberLikeType: write("Number"); break; case ts.TypeReferenceSerializationKind.StringLikeType: write("String"); break; case ts.TypeReferenceSerializationKind.ArrayLikeType: write("Array"); break; case ts.TypeReferenceSerializationKind.ESSymbolType: if (languageVersion < 2 /* ES6 */) { write("typeof Symbol === 'function' ? Symbol : Object"); } else { write("Symbol"); } break; case ts.TypeReferenceSerializationKind.TypeWithCallSignature: write("Function"); break; case ts.TypeReferenceSerializationKind.ObjectType: write("Object"); break; } } /** Serializes the parameter types of a function or the constructor of a class. Used by the __metadata decorator for a method or set accessor. */ function emitSerializedParameterTypesOfNode(node) { // serialization of parameter types uses the following rules: // // * If the declaration is a class, the parameters of the first constructor with a body are used. // * If the declaration is function-like and has a body, the parameters of the function are used. // // For the rules on serializing the type of each parameter declaration, see `serializeTypeOfDeclaration`. if (node) { var valueDeclaration = void 0; if (node.kind === 221 /* ClassDeclaration */) { valueDeclaration = ts.getFirstConstructorWithBody(node); } else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) { valueDeclaration = node; } if (valueDeclaration) { var parameters = valueDeclaration.parameters; var skipThisCount = parameters.length && parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */ ? 1 : 0; var parameterCount = parameters.length; if (parameterCount > skipThisCount) { for (var i = skipThisCount; i < parameterCount; i++) { if (i > skipThisCount) { write(", "); } if (parameters[i].dotDotDotToken) { var parameterType = parameters[i].type; if (parameterType && parameterType.kind === 160 /* ArrayType */) { parameterType = parameterType.elementType; } else if (parameterType && parameterType.kind === 155 /* TypeReference */ && parameterType.typeArguments && parameterType.typeArguments.length === 1) { parameterType = parameterType.typeArguments[0]; } else { parameterType = undefined; } emitSerializedTypeNode(parameterType); } else { emitSerializedTypeOfNode(parameters[i]); } } } } } } /** Serializes the return type of function. Used by the __metadata decorator for a method. */ function emitSerializedReturnTypeOfNode(node) { if (node && ts.isFunctionLike(node)) { if (node.type) { emitSerializedTypeNode(node.type); return; } else if (ts.isAsyncFunctionLike(node)) { write("Promise"); return; } } write("void 0"); } function emitSerializedTypeMetadata(node, writeComma) { // This method emits the serialized type metadata for a decorator target. // The caller should have already tested whether the node has decorators. var argumentsWritten = 0; if (compilerOptions.emitDecoratorMetadata) { if (shouldEmitTypeMetadata(node)) { if (writeComma) { write(", "); } writeLine(); write("__metadata('design:type', "); emitSerializedTypeOfNode(node); write(")"); argumentsWritten++; } if (shouldEmitParamTypesMetadata(node)) { if (writeComma || argumentsWritten) { write(", "); } writeLine(); write("__metadata('design:paramtypes', ["); emitSerializedParameterTypesOfNode(node); write("])"); argumentsWritten++; } if (shouldEmitReturnTypeMetadata(node)) { if (writeComma || argumentsWritten) { write(", "); } writeLine(); write("__metadata('design:returntype', "); emitSerializedReturnTypeOfNode(node); write(")"); argumentsWritten++; } } return argumentsWritten; } function emitInterfaceDeclaration(node) { emitCommentsOnNotEmittedNode(node); } function shouldEmitEnumDeclaration(node) { var isConstEnum = ts.isConst(node); return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules; } function emitEnumDeclaration(node) { // const enums are completely erased during compilation. if (!shouldEmitEnumDeclaration(node)) { return; } if (!shouldHoistDeclarationInSystemJsModule(node)) { // do not emit var if variable was already hoisted var isES6ExportedEnum = isES6ExportedDeclaration(node); if (!(node.flags & 1 /* Export */) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224 /* EnumDeclaration */))) { emitStart(node); if (isES6ExportedEnum) { write("export "); } write("var "); emit(node.name); emitEnd(node); write(";"); } } writeLine(); emitStart(node); write("(function ("); emitStart(node.name); write(getGeneratedNameForNode(node)); emitEnd(node.name); write(") {"); increaseIndent(); emitLines(node.members); decreaseIndent(); writeLine(); emitToken(16 /* CloseBraceToken */, node.members.end); write(")("); emitModuleMemberName(node); write(" || ("); emitModuleMemberName(node); write(" = {}));"); emitEnd(node); if (!isES6ExportedDeclaration(node) && node.flags & 1 /* Export */ && !shouldHoistDeclarationInSystemJsModule(node)) { // do not emit var if variable was already hoisted writeLine(); emitStart(node); write("var "); emit(node.name); write(" = "); emitModuleMemberName(node); emitEnd(node); write(";"); } if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) { if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) { // write the call to exporter for enum writeLine(); write(exportFunctionForFile + "(\""); emitDeclarationName(node); write("\", "); emitDeclarationName(node); write(");"); } emitExportMemberAssignments(node.name); } } function emitEnumMember(node) { var enumParent = node.parent; emitStart(node); write(getGeneratedNameForNode(enumParent)); write("["); write(getGeneratedNameForNode(enumParent)); write("["); emitExpressionForPropertyName(node.name); write("] = "); writeEnumMemberDeclarationValue(node); write("] = "); emitExpressionForPropertyName(node.name); emitEnd(node); write(";"); } function writeEnumMemberDeclarationValue(member) { var value = resolver.getConstantValue(member); if (value !== undefined) { write(value.toString()); return; } else if (member.initializer) { emit(member.initializer); } else { write("undefined"); } } function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) { if (moduleDeclaration.body && moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) { var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body); return recursiveInnerModule || moduleDeclaration.body; } } function shouldEmitModuleDeclaration(node) { return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules); } function isModuleMergedWithES6Class(node) { return languageVersion === 2 /* ES6 */ && !!(resolver.getNodeCheckFlags(node) & 32768 /* LexicalModuleMergesWithClass */); } function isFirstDeclarationOfKind(node, declarations, kind) { return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; }); } function emitModuleDeclaration(node) { // Emit only if this module is non-ambient. var shouldEmit = shouldEmitModuleDeclaration(node); if (!shouldEmit) { return emitCommentsOnNotEmittedNode(node); } var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node); var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node); if (emitVarForModule) { var isES6ExportedNamespace = isES6ExportedDeclaration(node); if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225 /* ModuleDeclaration */)) { emitStart(node); if (isES6ExportedNamespace) { write("export "); } write("var "); emit(node.name); write(";"); emitEnd(node); writeLine(); } } emitStart(node); write("(function ("); emitStart(node.name); write(getGeneratedNameForNode(node)); emitEnd(node.name); write(") "); ts.Debug.assert(node.body !== undefined); // node.body must exist, as this is a non-ambient module if (node.body.kind === 226 /* ModuleBlock */) { var saveConvertedLoopState = convertedLoopState; var saveTempFlags = tempFlags; var saveTempVariables = tempVariables; convertedLoopState = undefined; tempFlags = 0; tempVariables = undefined; emit(node.body); ts.Debug.assert(convertedLoopState === undefined); convertedLoopState = saveConvertedLoopState; tempFlags = saveTempFlags; tempVariables = saveTempVariables; } else { write("{"); increaseIndent(); emitCaptureThisForNodeIfNecessary(node); writeLine(); emit(node.body); decreaseIndent(); writeLine(); var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body; emitToken(16 /* CloseBraceToken */, moduleBlock.statements.end); } write(")("); // write moduleDecl = containingModule.m only if it is not exported es6 module member if ((node.flags & 1 /* Export */) && !isES6ExportedDeclaration(node)) { emit(node.name); write(" = "); } emitModuleMemberName(node); write(" || ("); emitModuleMemberName(node); write(" = {}));"); emitEnd(node); if (!isES6ExportedDeclaration(node) && node.name.kind === 69 /* Identifier */ && node.parent === currentSourceFile) { if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) { writeLine(); write(exportFunctionForFile + "(\""); emitDeclarationName(node); write("\", "); emitDeclarationName(node); write(");"); } emitExportMemberAssignments(node.name); } } /* * Some bundlers (SystemJS builder) sometimes want to rename dependencies. * Here we check if alternative name was provided for a given moduleName and return it if possible. */ function tryRenameExternalModule(moduleName) { if (renamedDependencies && moduleName.text in renamedDependencies) { return "\"" + renamedDependencies[moduleName.text] + "\""; } return undefined; } function emitRequire(moduleName) { if (moduleName.kind === 9 /* StringLiteral */) { write("require("); var text = tryRenameExternalModule(moduleName); if (text) { write(text); } else { emitStart(moduleName); emitLiteral(moduleName); emitEnd(moduleName); } emitToken(18 /* CloseParenToken */, moduleName.end); } else { write("require()"); } } function getNamespaceDeclarationNode(node) { if (node.kind === 229 /* ImportEqualsDeclaration */) { return node; } var importClause = node.importClause; if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232 /* NamespaceImport */) { return importClause.namedBindings; } } function isDefaultImport(node) { return node.kind === 230 /* ImportDeclaration */ && node.importClause && !!node.importClause.name; } function emitExportImportAssignments(node) { if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) { emitExportMemberAssignments(node.name); } ts.forEachChild(node, emitExportImportAssignments); } function emitImportDeclaration(node) { if (modulekind !== ts.ModuleKind.ES6) { return emitExternalImportDeclaration(node); } // ES6 import if (node.importClause) { var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause); var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, /* checkChildren */ true); if (shouldEmitDefaultBindings || shouldEmitNamedBindings) { write("import "); emitStart(node.importClause); if (shouldEmitDefaultBindings) { emit(node.importClause.name); if (shouldEmitNamedBindings) { write(", "); } } if (shouldEmitNamedBindings) { emitLeadingComments(node.importClause.namedBindings); emitStart(node.importClause.namedBindings); if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) { write("* as "); emit(node.importClause.namedBindings.name); } else { write("{ "); emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration); write(" }"); } emitEnd(node.importClause.namedBindings); emitTrailingComments(node.importClause.namedBindings); } emitEnd(node.importClause); write(" from "); emit(node.moduleSpecifier); write(";"); } } else { write("import "); emit(node.moduleSpecifier); write(";"); } } function emitExternalImportDeclaration(node) { if (ts.contains(externalImports, node)) { var isExportedImport = node.kind === 229 /* ImportEqualsDeclaration */ && (node.flags & 1 /* Export */) !== 0; var namespaceDeclaration = getNamespaceDeclarationNode(node); var varOrConst = (languageVersion <= 1 /* ES5 */) ? "var " : "const "; if (modulekind !== ts.ModuleKind.AMD) { emitLeadingComments(node); emitStart(node); if (namespaceDeclaration && !isDefaultImport(node)) { // import x = require("foo") // import * as x from "foo" if (!isExportedImport) { write(varOrConst); } ; emitModuleMemberName(namespaceDeclaration); write(" = "); } else { // import "foo" // import x from "foo" // import { x, y } from "foo" // import d, * as x from "foo" // import d, { x, y } from "foo" var isNakedImport = node.kind === 230 /* ImportDeclaration */ && !node.importClause; if (!isNakedImport) { write(varOrConst); write(getGeneratedNameForNode(node)); write(" = "); } } emitRequire(ts.getExternalModuleName(node)); if (namespaceDeclaration && isDefaultImport(node)) { // import d, * as x from "foo" write(", "); emitModuleMemberName(namespaceDeclaration); write(" = "); write(getGeneratedNameForNode(node)); } write(";"); emitEnd(node); emitExportImportAssignments(node); emitTrailingComments(node); } else { if (isExportedImport) { emitModuleMemberName(namespaceDeclaration); write(" = "); emit(namespaceDeclaration.name); write(";"); } else if (namespaceDeclaration && isDefaultImport(node)) { // import d, * as x from "foo" write(varOrConst); emitModuleMemberName(namespaceDeclaration); write(" = "); write(getGeneratedNameForNode(node)); write(";"); } emitExportImportAssignments(node); } } } function emitImportEqualsDeclaration(node) { if (ts.isExternalModuleImportEqualsDeclaration(node)) { emitExternalImportDeclaration(node); return; } // preserve old compiler's behavior: emit 'var' for import declaration (even if we do not consider them referenced) when // - current file is not external module // - import declaration is top level and target is value imported by entity name if (resolver.isReferencedAliasDeclaration(node) || (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) { emitLeadingComments(node); emitStart(node); // variable declaration for import-equals declaration can be hoisted in system modules // in this case 'var' should be omitted and emit should contain only initialization var variableDeclarationIsHoisted = shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true); // is it top level export import v = a.b.c in system module? // if yes - it needs to be rewritten as exporter('v', v = a.b.c) var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ true); if (!variableDeclarationIsHoisted) { ts.Debug.assert(!isExported); if (isES6ExportedDeclaration(node)) { write("export "); write("var "); } else if (!(node.flags & 1 /* Export */)) { write("var "); } } if (isExported) { write(exportFunctionForFile + "(\""); emitNodeWithoutSourceMap(node.name); write("\", "); } emitModuleMemberName(node); write(" = "); emit(node.moduleReference); if (isExported) { write(")"); } write(";"); emitEnd(node); emitExportImportAssignments(node); emitTrailingComments(node); } } function emitExportDeclaration(node) { ts.Debug.assert(modulekind !== ts.ModuleKind.System); if (modulekind !== ts.ModuleKind.ES6) { if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) { emitStart(node); var generatedName = getGeneratedNameForNode(node); if (node.exportClause) { // export { x, y, ... } from "foo" if (modulekind !== ts.ModuleKind.AMD) { write("var "); write(generatedName); write(" = "); emitRequire(ts.getExternalModuleName(node)); write(";"); } for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) { var specifier = _b[_a]; if (resolver.isValueAliasDeclaration(specifier)) { writeLine(); emitStart(specifier); emitContainingModuleName(specifier); write("."); emitNodeWithCommentsAndWithoutSourcemap(specifier.name); write(" = "); write(generatedName); write("."); emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name); write(";"); emitEnd(specifier); } } } else { // export * from "foo" if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) { writeLine(); write("__export("); if (modulekind !== ts.ModuleKind.AMD) { emitRequire(ts.getExternalModuleName(node)); } else { write(generatedName); } write(");"); } } emitEnd(node); } } else { if (!node.exportClause || resolver.isValueAliasDeclaration(node)) { write("export "); if (node.exportClause) { // export { x, y, ... } write("{ "); emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration); write(" }"); } else { write("*"); } if (node.moduleSpecifier) { write(" from "); emit(node.moduleSpecifier); } write(";"); } } } function emitExportOrImportSpecifierList(specifiers, shouldEmit) { ts.Debug.assert(modulekind === ts.ModuleKind.ES6); var needsComma = false; for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) { var specifier = specifiers_1[_a]; if (shouldEmit(specifier)) { if (needsComma) { write(", "); } if (specifier.propertyName) { emit(specifier.propertyName); write(" as "); } emit(specifier.name); needsComma = true; } } } function emitExportAssignment(node) { if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) { if (modulekind === ts.ModuleKind.ES6) { writeLine(); emitStart(node); write("export default "); var expression = node.expression; emit(expression); if (expression.kind !== 220 /* FunctionDeclaration */ && expression.kind !== 221 /* ClassDeclaration */) { write(";"); } emitEnd(node); } else { writeLine(); emitStart(node); if (modulekind === ts.ModuleKind.System) { write(exportFunctionForFile + "(\"default\","); emit(node.expression); write(")"); } else { emitEs6ExportDefaultCompat(node); emitContainingModuleName(node); if (languageVersion === 0 /* ES3 */) { write('["default"] = '); } else { write(".default = "); } emit(node.expression); } write(";"); emitEnd(node); } } } function collectExternalModuleInfo(sourceFile) { externalImports = []; exportSpecifiers = ts.createMap(); exportEquals = undefined; hasExportStarsToExportValues = false; for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) { var node = _b[_a]; switch (node.kind) { case 230 /* ImportDeclaration */: if (!node.importClause || resolver.isReferencedAliasDeclaration(node.importClause, /*checkChildren*/ true)) { // import "mod" // import x from "mod" where x is referenced // import * as x from "mod" where x is referenced // import { x, y } from "mod" where at least one import is referenced externalImports.push(node); } break; case 229 /* ImportEqualsDeclaration */: if (node.moduleReference.kind === 240 /* ExternalModuleReference */ && resolver.isReferencedAliasDeclaration(node)) { // import x = require("mod") where x is referenced externalImports.push(node); } break; case 236 /* ExportDeclaration */: if (node.moduleSpecifier) { if (!node.exportClause) { // export * from "mod" if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) { externalImports.push(node); hasExportStarsToExportValues = true; } } else if (resolver.isValueAliasDeclaration(node)) { // export { x, y } from "mod" where at least one export is a value symbol externalImports.push(node); } } else { // export { x, y } for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) { var specifier = _d[_c]; var name_30 = (specifier.propertyName || specifier.name).text; (exportSpecifiers[name_30] || (exportSpecifiers[name_30] = [])).push(specifier); } } break; case 235 /* ExportAssignment */: if (node.isExportEquals && !exportEquals) { // export = x exportEquals = node; } break; } } } function emitExportStarHelper() { if (hasExportStarsToExportValues) { writeLine(); write("function __export(m) {"); increaseIndent(); writeLine(); write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];"); decreaseIndent(); writeLine(); write("}"); } } function getLocalNameForExternalImport(node) { var namespaceDeclaration = getNamespaceDeclarationNode(node); if (namespaceDeclaration && !isDefaultImport(node)) { return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name); } if (node.kind === 230 /* ImportDeclaration */ && node.importClause) { return getGeneratedNameForNode(node); } if (node.kind === 236 /* ExportDeclaration */ && node.moduleSpecifier) { return getGeneratedNameForNode(node); } } function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) { if (emitRelativePathAsModuleName) { var name_31 = getExternalModuleNameFromDeclaration(host, resolver, importNode); if (name_31) { return "\"" + name_31 + "\""; } } var moduleName = ts.getExternalModuleName(importNode); if (moduleName.kind === 9 /* StringLiteral */) { return tryRenameExternalModule(moduleName) || getLiteralText(moduleName); } return undefined; } function emitVariableDeclarationsForImports() { if (externalImports.length === 0) { return; } writeLine(); var started = false; for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) { var importNode = externalImports_1[_a]; // do not create variable declaration for exports and imports that lack import clause var skipNode = importNode.kind === 236 /* ExportDeclaration */ || (importNode.kind === 230 /* ImportDeclaration */ && !importNode.importClause); if (skipNode) { continue; } if (!started) { write("var "); started = true; } else { write(", "); } write(getLocalNameForExternalImport(importNode)); } if (started) { write(";"); } } function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) { // when resolving exports local exported entries/indirect exported entries in the module // should always win over entries with similar names that were added via star exports // to support this we store names of local/indirect exported entries in a set. // this set is used to filter names brought by star exports. if (!hasExportStarsToExportValues) { // local names set is needed only in presence of star exports return undefined; } // local names set should only be added if we have anything exported if (!exportedDeclarations && !ts.someProperties(exportSpecifiers)) { // no exported declarations (export var ...) or export specifiers (export {x}) // check if we have any non star export declarations. var hasExportDeclarationWithExportClause = false; for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) { var externalImport = externalImports_2[_a]; if (externalImport.kind === 236 /* ExportDeclaration */ && externalImport.exportClause) { hasExportDeclarationWithExportClause = true; break; } } if (!hasExportDeclarationWithExportClause) { // we still need to emit exportStar helper return emitExportStarFunction(/*localNames*/ undefined); } } var exportedNamesStorageRef = makeUniqueName("exportedNames"); writeLine(); write("var " + exportedNamesStorageRef + " = {"); increaseIndent(); var started = false; if (exportedDeclarations) { for (var i = 0; i < exportedDeclarations.length; i++) { // write name of exported declaration, i.e 'export var x...' writeExportedName(exportedDeclarations[i]); } } if (exportSpecifiers) { for (var n in exportSpecifiers) { for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) { var specifier = _c[_b]; // write name of export specified, i.e. 'export {x}' writeExportedName(specifier.name); } } } for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) { var externalImport = externalImports_3[_d]; if (externalImport.kind !== 236 /* ExportDeclaration */) { continue; } var exportDecl = externalImport; if (!exportDecl.exportClause) { // export * from ... continue; } for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) { var element = _f[_e]; // write name of indirectly exported entry, i.e. 'export {x} from ...' writeExportedName(element.name || element.propertyName); } } decreaseIndent(); writeLine(); write("};"); return emitExportStarFunction(exportedNamesStorageRef); function emitExportStarFunction(localNames) { var exportStarFunction = makeUniqueName("exportStar"); writeLine(); // define an export star helper function write("function " + exportStarFunction + "(m) {"); increaseIndent(); writeLine(); write("var exports = {};"); writeLine(); write("for(var n in m) {"); increaseIndent(); writeLine(); write("if (n !== \"default\""); if (localNames) { write("&& !" + localNames + ".hasOwnProperty(n)"); } write(") exports[n] = m[n];"); decreaseIndent(); writeLine(); write("}"); writeLine(); write(exportFunctionForFile + "(exports);"); decreaseIndent(); writeLine(); write("}"); return exportStarFunction; } function writeExportedName(node) { // do not record default exports // they are local to module and never overwritten (explicitly skipped) by star export if (node.kind !== 69 /* Identifier */ && node.flags & 512 /* Default */) { return; } if (started) { write(","); } else { started = true; } writeLine(); write("'"); if (node.kind === 69 /* Identifier */) { emitNodeWithCommentsAndWithoutSourcemap(node); } else { emitDeclarationName(node); } write("': true"); } } function processTopLevelVariableAndFunctionDeclarations(node) { // per ES6 spec: // 15.2.1.16.4 ModuleDeclarationInstantiation() Concrete Method // - var declarations are initialized to undefined - 14.a.ii // - function/generator declarations are instantiated - 16.a.iv // this means that after module is instantiated but before its evaluation // exported functions are already accessible at import sites // in theory we should hoist only exported functions and its dependencies // in practice to simplify things we'll hoist all source level functions and variable declaration // including variables declarations for module and class declarations var hoistedVars; var hoistedFunctionDeclarations; var exportedDeclarations; visit(node); if (hoistedVars) { writeLine(); write("var "); var seen = ts.createMap(); for (var i = 0; i < hoistedVars.length; i++) { var local = hoistedVars[i]; var name_32 = local.kind === 69 /* Identifier */ ? local : local.name; if (name_32) { // do not emit duplicate entries (in case of declaration merging) in the list of hoisted variables var text = ts.unescapeIdentifier(name_32.text); if (text in seen) { continue; } else { seen[text] = text; } } if (i !== 0) { write(", "); } if (local.kind === 221 /* ClassDeclaration */ || local.kind === 225 /* ModuleDeclaration */ || local.kind === 224 /* EnumDeclaration */) { emitDeclarationName(local); } else { emit(local); } var flags = ts.getCombinedNodeFlags(local.kind === 69 /* Identifier */ ? local.parent : local); if (flags & 1 /* Export */) { if (!exportedDeclarations) { exportedDeclarations = []; } exportedDeclarations.push(local); } } write(";"); } if (hoistedFunctionDeclarations) { for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) { var f = hoistedFunctionDeclarations_1[_a]; writeLine(); emit(f); if (f.flags & 1 /* Export */) { if (!exportedDeclarations) { exportedDeclarations = []; } exportedDeclarations.push(f); } } } return exportedDeclarations; function visit(node) { if (node.flags & 2 /* Ambient */) { return; } if (node.kind === 220 /* FunctionDeclaration */) { if (!hoistedFunctionDeclarations) { hoistedFunctionDeclarations = []; } hoistedFunctionDeclarations.push(node); return; } if (node.kind === 221 /* ClassDeclaration */) { if (!hoistedVars) { hoistedVars = []; } hoistedVars.push(node); return; } if (node.kind === 224 /* EnumDeclaration */) { if (shouldEmitEnumDeclaration(node)) { if (!hoistedVars) { hoistedVars = []; } hoistedVars.push(node); } return; } if (node.kind === 225 /* ModuleDeclaration */) { if (shouldEmitModuleDeclaration(node)) { if (!hoistedVars) { hoistedVars = []; } hoistedVars.push(node); } return; } if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) { if (shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ false)) { var name_33 = node.name; if (name_33.kind === 69 /* Identifier */) { if (!hoistedVars) { hoistedVars = []; } hoistedVars.push(name_33); } else { ts.forEachChild(name_33, visit); } } return; } if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) { if (!hoistedVars) { hoistedVars = []; } hoistedVars.push(node.name); return; } if (ts.isBindingPattern(node)) { ts.forEach(node.elements, visit); return; } if (!ts.isDeclaration(node)) { ts.forEachChild(node, visit); } } } function shouldHoistVariable(node, checkIfSourceFileLevelDecl) { if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) { return false; } // hoist variable if // - it is not block scoped // - it is top level block scoped // if block scoped variables are nested in some another block then // no other functions can use them except ones that are defined at least in the same block return (ts.getCombinedNodeFlags(node) & 3072 /* BlockScoped */) === 0 || ts.getEnclosingBlockScopeContainer(node).kind === 256 /* SourceFile */; } function isCurrentFileSystemExternalModule() { return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule; } function emitSystemModuleBody(node, dependencyGroups, startIndex) { // shape of the body in system modules: // function (exports) { // <list of local aliases for imports> // <hoisted function declarations> // <hoisted variable declarations> // return { // setters: [ // <list of setter function for imports> // ], // execute: function() { // <module statements> // } // } // <temp declarations> // } // I.e: // import {x} from 'file1' // var y = 1; // export function foo() { return y + x(); } // console.log(y); // will be transformed to // function(exports) { // var file1; // local alias // var y; // function foo() { return y + file1.x(); } // exports("foo", foo); // return { // setters: [ // function(v) { file1 = v } // ], // execute(): function() { // y = 1; // console.log(y); // } // }; // } emitVariableDeclarationsForImports(); writeLine(); var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node); var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations); writeLine(); write("return {"); increaseIndent(); writeLine(); emitSetters(exportStarFunction, dependencyGroups); writeLine(); emitExecute(node, startIndex); decreaseIndent(); writeLine(); write("}"); // return emitTempDeclarations(/*newLine*/ true); } function emitSetters(exportStarFunction, dependencyGroups) { write("setters:["); for (var i = 0; i < dependencyGroups.length; i++) { if (i !== 0) { write(","); } writeLine(); increaseIndent(); var group = dependencyGroups[i]; // derive a unique name for parameter from the first named entry in the group var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || ""); write("function (" + parameterName + ") {"); increaseIndent(); for (var _a = 0, group_1 = group; _a < group_1.length; _a++) { var entry = group_1[_a]; var importVariableName = getLocalNameForExternalImport(entry) || ""; switch (entry.kind) { case 230 /* ImportDeclaration */: if (!entry.importClause) { // 'import "..."' case // module is imported only for side-effects, no emit required break; } // fall-through case 229 /* ImportEqualsDeclaration */: ts.Debug.assert(importVariableName !== ""); writeLine(); // save import into the local write(importVariableName + " = " + parameterName + ";"); writeLine(); break; case 236 /* ExportDeclaration */: ts.Debug.assert(importVariableName !== ""); if (entry.exportClause) { // export {a, b as c} from 'foo' // emit as: // exports_({ // "a": _["a"], // "c": _["b"] // }); writeLine(); write(exportFunctionForFile + "({"); writeLine(); increaseIndent(); for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) { if (i_1 !== 0) { write(","); writeLine(); } var e = entry.exportClause.elements[i_1]; write("\""); emitNodeWithCommentsAndWithoutSourcemap(e.name); write("\": " + parameterName + "[\""); emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name); write("\"]"); } decreaseIndent(); writeLine(); write("});"); } else { // collectExternalModuleInfo prefilters star exports to keep only ones that export values // this means that check 'resolver.moduleExportsSomeValue' is redundant and can be omitted here writeLine(); // export * from 'foo' // emit as: // exportStar(_foo); write(exportStarFunction + "(" + parameterName + ");"); } writeLine(); break; } } decreaseIndent(); write("}"); decreaseIndent(); } write("],"); } function emitExecute(node, startIndex) { write("execute: function() {"); increaseIndent(); writeLine(); for (var i = startIndex; i < node.statements.length; i++) { var statement = node.statements[i]; switch (statement.kind) { // - function declarations are not emitted because they were already hoisted // - import declarations are not emitted since they are already handled in setters // - export declarations with module specifiers are not emitted since they were already written in setters // - export declarations without module specifiers are emitted preserving the order case 220 /* FunctionDeclaration */: case 230 /* ImportDeclaration */: continue; case 236 /* ExportDeclaration */: if (!statement.moduleSpecifier) { for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) { var element = _b[_a]; // write call to exporter function for every export specifier in exports list emitExportSpecifierInSystemModule(element); } } continue; case 229 /* ImportEqualsDeclaration */: if (!ts.isInternalModuleImportEqualsDeclaration(statement)) { // - import equals declarations that import external modules are not emitted continue; } // fall-though for import declarations that import internal modules default: writeLine(); emit(statement); } } decreaseIndent(); writeLine(); write("}"); // execute } function writeModuleName(node, emitRelativePathAsModuleName) { var moduleName = node.moduleName; if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) { write("\"" + moduleName + "\", "); } } function emitSystemModule(node, emitRelativePathAsModuleName) { collectExternalModuleInfo(node); // System modules has the following shape // System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */}) // 'exports' here is a function 'exports<T>(name: string, value: T): T' that is used to publish exported values. // 'exports' returns its 'value' argument so in most cases expressions // that mutate exported values can be rewritten as: // expr -> exports('name', expr). // The only exception in this rule is postfix unary operators, // see comment to 'emitPostfixUnaryExpression' for more details ts.Debug.assert(!exportFunctionForFile); // make sure that name of 'exports' function does not conflict with existing identifiers exportFunctionForFile = makeUniqueName("exports"); contextObjectForFile = makeUniqueName("context"); writeLine(); write("System.register("); writeModuleName(node, emitRelativePathAsModuleName); write("["); var groupIndices = ts.createMap(); var dependencyGroups = []; for (var i = 0; i < externalImports.length; i++) { var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName); if (text === undefined) { continue; } // text should be quoted string // for deduplication purposes in key remove leading and trailing quotes so 'a' and "a" will be considered the same var key = text.substr(1, text.length - 2); if (key in groupIndices) { // deduplicate/group entries in dependency list by the dependency name var groupIndex = groupIndices[key]; dependencyGroups[groupIndex].push(externalImports[i]); continue; } else { groupIndices[key] = dependencyGroups.length; dependencyGroups.push([externalImports[i]]); } if (i !== 0) { write(", "); } write(text); } write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {"); writeLine(); increaseIndent(); var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict); writeLine(); write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;"); writeLine(); emitEmitHelpers(node); emitCaptureThisForNodeIfNecessary(node); emitSystemModuleBody(node, dependencyGroups, startIndex); decreaseIndent(); writeLine(); write("});"); } function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) { // names of modules with corresponding parameter in the factory function var aliasedModuleNames = []; // names of modules with no corresponding parameters in factory function var unaliasedModuleNames = []; var importAliasNames = []; // names of the parameters in the factory function; these // parameters need to match the indexes of the corresponding // module names in aliasedModuleNames. // Fill in amd-dependency tags for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) { var amdDependency = _b[_a]; if (amdDependency.name) { aliasedModuleNames.push('"' + amdDependency.path + '"'); importAliasNames.push(amdDependency.name); } else { unaliasedModuleNames.push('"' + amdDependency.path + '"'); } } for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) { var importNode = externalImports_4[_c]; // Find the name of the external module var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName); // Find the name of the module alias, if there is one var importAliasName = getLocalNameForExternalImport(importNode); if (includeNonAmdDependencies && importAliasName) { aliasedModuleNames.push(externalModuleName); importAliasNames.push(importAliasName); } else { unaliasedModuleNames.push(externalModuleName); } } return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames }; } function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) { // An AMD define function has the following shape: // define(id?, dependencies?, factory); // // This has the shape of // define(name, ["module1", "module2"], function (module1Alias) { // The location of the alias in the parameter list in the factory function needs to // match the position of the module name in the dependency list. // // To ensure this is true in cases of modules with no aliases, e.g.: // `import "module"` or `<amd-dependency path= "a.css" />` // we need to add modules without alias names to the end of the dependencies list var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName); emitAMDDependencyList(dependencyNames); write(", "); emitAMDFactoryHeader(dependencyNames); } function emitAMDDependencyList(_a) { var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames; write('["require", "exports"'); if (aliasedModuleNames.length) { write(", "); write(aliasedModuleNames.join(", ")); } if (unaliasedModuleNames.length) { write(", "); write(unaliasedModuleNames.join(", ")); } write("]"); } function emitAMDFactoryHeader(_a) { var importAliasNames = _a.importAliasNames; write("function (require, exports"); if (importAliasNames.length) { write(", "); write(importAliasNames.join(", ")); } write(") {"); } function emitAMDModule(node, emitRelativePathAsModuleName) { emitEmitHelpers(node); collectExternalModuleInfo(node); writeLine(); write("define("); writeModuleName(node, emitRelativePathAsModuleName); emitAMDDependencies(node, /*includeNonAmdDependencies*/ true, emitRelativePathAsModuleName); increaseIndent(); var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict); emitExportStarHelper(); emitCaptureThisForNodeIfNecessary(node); emitLinesStartingAt(node.statements, startIndex); emitExportEquals(/*emitAsReturn*/ true); emitTempDeclarations(/*newLine*/ true); decreaseIndent(); writeLine(); write("});"); } function emitCommonJSModule(node) { var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict); emitEmitHelpers(node); collectExternalModuleInfo(node); emitExportStarHelper(); emitCaptureThisForNodeIfNecessary(node); emitLinesStartingAt(node.statements, startIndex); emitExportEquals(/*emitAsReturn*/ false); emitTempDeclarations(/*newLine*/ true); } function emitUMDModule(node) { emitEmitHelpers(node); collectExternalModuleInfo(node); var dependencyNames = getAMDDependencyNames(node, /*includeNonAmdDependencies*/ false); // Module is detected first to support Browserify users that load into a browser with an AMD loader writeLines("(function (factory) {\n if (typeof module === 'object' && typeof module.exports === 'object') {\n var v = factory(require, exports); if (v !== undefined) module.exports = v;\n }\n else if (typeof define === 'function' && define.amd) {\n define("); emitAMDDependencyList(dependencyNames); write(", factory);"); writeLines(" }\n})("); emitAMDFactoryHeader(dependencyNames); increaseIndent(); var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict); emitExportStarHelper(); emitCaptureThisForNodeIfNecessary(node); emitLinesStartingAt(node.statements, startIndex); emitExportEquals(/*emitAsReturn*/ true); emitTempDeclarations(/*newLine*/ true); decreaseIndent(); writeLine(); write("});"); } function emitES6Module(node) { externalImports = undefined; exportSpecifiers = undefined; exportEquals = undefined; hasExportStarsToExportValues = false; var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false); emitEmitHelpers(node); emitCaptureThisForNodeIfNecessary(node); emitLinesStartingAt(node.statements, startIndex); emitTempDeclarations(/*newLine*/ true); // Emit exportDefault if it exists will happen as part // or normal statement emit. } function emitExportEquals(emitAsReturn) { if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) { writeLine(); emitStart(exportEquals); write(emitAsReturn ? "return " : "module.exports = "); emit(exportEquals.expression); write(";"); emitEnd(exportEquals); } } function emitJsxElement(node) { switch (compilerOptions.jsx) { case 2 /* React */: jsxEmitReact(node); break; case 1 /* Preserve */: // Fall back to preserve if None was specified (we'll error earlier) default: jsxEmitPreserve(node); break; } } function trimReactWhitespaceAndApplyEntities(node) { var result = undefined; var text = ts.getTextOfNode(node, /*includeTrivia*/ true); var firstNonWhitespace = 0; var lastNonWhitespace = -1; // JSX trims whitespace at the end and beginning of lines, except that the // start/end of a tag is considered a start/end of a line only if that line is // on the same line as the closing tag. See examples in tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx for (var i = 0; i < text.length; i++) { var c = text.charCodeAt(i); if (ts.isLineBreak(c)) { if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) { var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1); result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part); } firstNonWhitespace = -1; } else if (!ts.isWhiteSpaceSingleLine(c)) { lastNonWhitespace = i; if (firstNonWhitespace === -1) { firstNonWhitespace = i; } } } if (firstNonWhitespace !== -1) { var part = text.substr(firstNonWhitespace); result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part); } if (result) { // Replace entities like &nbsp; result = result.replace(/&(\w+);/g, function (s, m) { if (entities[m] !== undefined) { var ch = String.fromCharCode(entities[m]); // &quot; needs to be escaped return ch === '"' ? "\\\"" : ch; } else { return s; } }); } return result; } function isJsxChildEmittable(child) { if (child.kind === 248 /* JsxExpression */) { // Don't emit empty expressions return !!child.expression; } else if (child.kind === 244 /* JsxText */) { // Don't emit empty strings return !!getTextToEmit(child); } return true; } ; function getTextToEmit(node) { switch (compilerOptions.jsx) { case 2 /* React */: var text = trimReactWhitespaceAndApplyEntities(node); if (text === undefined || text.length === 0) { return undefined; } else { return text; } case 1 /* Preserve */: default: return ts.getTextOfNode(node, /*includeTrivia*/ true); } } function emitJsxText(node) { switch (compilerOptions.jsx) { case 2 /* React */: write('"'); write(trimReactWhitespaceAndApplyEntities(node)); write('"'); break; case 1 /* Preserve */: default: writer.writeLiteral(ts.getTextOfNode(node, /*includeTrivia*/ true)); break; } } function emitJsxExpression(node) { if (node.expression) { switch (compilerOptions.jsx) { case 1 /* Preserve */: default: write("{"); emit(node.expression); write("}"); break; case 2 /* React */: emit(node.expression); break; } } } function isUseStrictPrologue(node) { return node.expression.text === "use strict"; } function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) { if (writeUseStrict) { if (startWithNewLine) { writeLine(); } write("\"use strict\";"); } } function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) { var foundUseStrict = false; for (var i = 0; i < statements.length; i++) { if (ts.isPrologueDirective(statements[i])) { if (isUseStrictPrologue(statements[i])) { foundUseStrict = true; } if (startWithNewLine || i > 0) { writeLine(); } emit(statements[i]); } else { ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict); // return index of the first non prologue directive return i; } } ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict); return statements.length; } function writeLines(text) { var lines = text.split(/\r\n|\r|\n/g); for (var i = 0; i < lines.length; i++) { var line = lines[i]; if (line.length) { writeLine(); write(line); } } } function emitEmitHelpers(node) { // Only emit helpers if the user did not say otherwise. if (!compilerOptions.noEmitHelpers) { // Only Emit __extends function when target ES5. // For target ES6 and above, we can emit classDeclaration as is. if (languageVersion < 2 /* ES6 */ && !extendsEmitted && node.flags & 262144 /* HasClassExtends */) { writeLines(extendsHelper); extendsEmitted = true; } if (compilerOptions.jsx !== 1 /* Preserve */ && !assignEmitted && (node.flags & 1073741824 /* HasJsxSpreadAttribute */)) { writeLines(assignHelper); assignEmitted = true; } if (!decorateEmitted && node.flags & 524288 /* HasDecorators */) { writeLines(decorateHelper); if (compilerOptions.emitDecoratorMetadata) { writeLines(metadataHelper); } decorateEmitted = true; } if (!paramEmitted && node.flags & 1048576 /* HasParamDecorators */) { writeLines(paramHelper); paramEmitted = true; } if (!awaiterEmitted && node.flags & 2097152 /* HasAsyncFunctions */) { writeLines(awaiterHelper); awaiterEmitted = true; } } } function emitSourceFileNode(node) { // Start new file on new line writeLine(); emitShebang(); emitDetachedCommentsAndUpdateCommentsInfo(node); if (ts.isExternalModule(node) || compilerOptions.isolatedModules) { if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) { var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS]; emitModule(node); } else { bundleEmitDelegates[modulekind](node, /*emitRelativePathAsModuleName*/ true); } } else { // emit prologue directives prior to __extends var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false); externalImports = undefined; exportSpecifiers = undefined; exportEquals = undefined; hasExportStarsToExportValues = false; emitEmitHelpers(node); emitCaptureThisForNodeIfNecessary(node); emitLinesStartingAt(node.statements, startIndex); emitTempDeclarations(/*newLine*/ true); } emitLeadingComments(node.endOfFileToken); } function emit(node) { emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap); } function emitNodeWithCommentsAndWithoutSourcemap(node) { emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap); } function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) { if (node) { if (node.flags & 2 /* Ambient */) { return emitCommentsOnNotEmittedNode(node); } if (isSpecializedCommentHandling(node)) { // This is the node that will handle its own comments and sourcemap return emitNodeWithoutSourceMap(node); } var emitComments_1 = shouldEmitLeadingAndTrailingComments(node); if (emitComments_1) { emitLeadingComments(node); } emitNodeConsideringSourcemap(node); if (emitComments_1) { emitTrailingComments(node); } } } function emitNodeWithSourceMap(node) { if (node) { emitStart(node); emitNodeWithoutSourceMap(node); emitEnd(node); } } function emitNodeWithoutSourceMap(node) { if (node) { emitJavaScriptWorker(node); } } function changeSourceMapEmit(writer) { sourceMap = writer; emitStart = writer.emitStart; emitEnd = writer.emitEnd; emitPos = writer.emitPos; setSourceFile = writer.setSourceFile; } function withTemporaryNoSourceMap(callback) { var prevSourceMap = sourceMap; setSourceMapWriterEmit(ts.getNullSourceMapWriter()); callback(); setSourceMapWriterEmit(prevSourceMap); } function isSpecializedCommentHandling(node) { switch (node.kind) { // All of these entities are emitted in a specialized fashion. As such, we allow // the specialized methods for each to handle the comments on the nodes. case 222 /* InterfaceDeclaration */: case 220 /* FunctionDeclaration */: case 230 /* ImportDeclaration */: case 229 /* ImportEqualsDeclaration */: case 223 /* TypeAliasDeclaration */: case 235 /* ExportAssignment */: return true; } } function shouldEmitLeadingAndTrailingComments(node) { switch (node.kind) { case 200 /* VariableStatement */: return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node); case 225 /* ModuleDeclaration */: // Only emit the leading/trailing comments for a module if we're actually // emitting the module as well. return shouldEmitModuleDeclaration(node); case 224 /* EnumDeclaration */: // Only emit the leading/trailing comments for an enum if we're actually // emitting the module as well. return shouldEmitEnumDeclaration(node); } // If the node is emitted in specialized fashion, dont emit comments as this node will handle // emitting comments when emitting itself ts.Debug.assert(!isSpecializedCommentHandling(node)); // If this is the expression body of an arrow function that we're down-leveling, // then we don't want to emit comments when we emit the body. It will have already // been taken care of when we emitted the 'return' statement for the function // expression body. if (node.kind !== 199 /* Block */ && node.parent && node.parent.kind === 180 /* ArrowFunction */ && node.parent.body === node && languageVersion <= 1 /* ES5 */) { return false; } // Emit comments for everything else. return true; } function emitJavaScriptWorker(node) { // Check if the node can be emitted regardless of the ScriptTarget switch (node.kind) { case 69 /* Identifier */: return emitIdentifier(node); case 142 /* Parameter */: return emitParameter(node); case 147 /* MethodDeclaration */: case 146 /* MethodSignature */: return emitMethod(node); case 149 /* GetAccessor */: case 150 /* SetAccessor */: return emitAccessor(node); case 97 /* ThisKeyword */: return emitThis(node); case 95 /* SuperKeyword */: return emitSuper(node); case 93 /* NullKeyword */: return write("null"); case 99 /* TrueKeyword */: return write("true"); case 84 /* FalseKeyword */: return write("false"); case 8 /* NumericLiteral */: case 9 /* StringLiteral */: case 10 /* RegularExpressionLiteral */: case 11 /* NoSubstitutionTemplateLiteral */: case 12 /* TemplateHead */: case 13 /* TemplateMiddle */: case 14 /* TemplateTail */: return emitLiteral(node); case 189 /* TemplateExpression */: return emitTemplateExpression(node); case 197 /* TemplateSpan */: return emitTemplateSpan(node); case 241 /* JsxElement */: case 242 /* JsxSelfClosingElement */: return emitJsxElement(node); case 244 /* JsxText */: return emitJsxText(node); case 248 /* JsxExpression */: return emitJsxExpression(node); case 139 /* QualifiedName */: return emitQualifiedName(node); case 167 /* ObjectBindingPattern */: return emitObjectBindingPattern(node); case 168 /* ArrayBindingPattern */: return emitArrayBindingPattern(node); case 169 /* BindingElement */: return emitBindingElement(node); case 170 /* ArrayLiteralExpression */: return emitArrayLiteral(node); case 171 /* ObjectLiteralExpression */: return emitObjectLiteral(node); case 253 /* PropertyAssignment */: return emitPropertyAssignment(node); case 254 /* ShorthandPropertyAssignment */: return emitShorthandPropertyAssignment(node); case 140 /* ComputedPropertyName */: return emitComputedPropertyName(node); case 172 /* PropertyAccessExpression */: return emitPropertyAccess(node); case 173 /* ElementAccessExpression */: return emitIndexedAccess(node); case 174 /* CallExpression */: return emitCallExpression(node); case 175 /* NewExpression */: return emitNewExpression(node); case 176 /* TaggedTemplateExpression */: return emitTaggedTemplateExpression(node); case 177 /* TypeAssertionExpression */: case 195 /* AsExpression */: case 196 /* NonNullExpression */: return emit(node.expression); case 178 /* ParenthesizedExpression */: return emitParenExpression(node); case 220 /* FunctionDeclaration */: case 179 /* FunctionExpression */: case 180 /* ArrowFunction */: return emitFunctionDeclaration(node); case 181 /* DeleteExpression */: return emitDeleteExpression(node); case 182 /* TypeOfExpression */: return emitTypeOfExpression(node); case 183 /* VoidExpression */: return emitVoidExpression(node); case 184 /* AwaitExpression */: return emitAwaitExpression(node); case 185 /* PrefixUnaryExpression */: return emitPrefixUnaryExpression(node); case 186 /* PostfixUnaryExpression */: return emitPostfixUnaryExpression(node); case 187 /* BinaryExpression */: return emitBinaryExpression(node); case 188 /* ConditionalExpression */: return emitConditionalExpression(node); case 191 /* SpreadElementExpression */: return emitSpreadElementExpression(node); case 190 /* YieldExpression */: return emitYieldExpression(node); case 193 /* OmittedExpression */: return; case 199 /* Block */: case 226 /* ModuleBlock */: return emitBlock(node); case 200 /* VariableStatement */: return emitVariableStatement(node); case 201 /* EmptyStatement */: return write(";"); case 202 /* ExpressionStatement */: return emitExpressionStatement(node); case 203 /* IfStatement */: return emitIfStatement(node); case 204 /* DoStatement */: return emitDoStatement(node); case 205 /* WhileStatement */: return emitWhileStatement(node); case 206 /* ForStatement */: return emitForStatement(node); case 208 /* ForOfStatement */: case 207 /* ForInStatement */: return emitForInOrForOfStatement(node); case 209 /* ContinueStatement */: case 210 /* BreakStatement */: return emitBreakOrContinueStatement(node); case 211 /* ReturnStatement */: return emitReturnStatement(node); case 212 /* WithStatement */: return emitWithStatement(node); case 213 /* SwitchStatement */: return emitSwitchStatement(node); case 249 /* CaseClause */: case 250 /* DefaultClause */: return emitCaseOrDefaultClause(node); case 214 /* LabeledStatement */: return emitLabeledStatement(node); case 215 /* ThrowStatement */: return emitThrowStatement(node); case 216 /* TryStatement */: return emitTryStatement(node); case 252 /* CatchClause */: return emitCatchClause(node); case 217 /* DebuggerStatement */: return emitDebuggerStatement(node); case 218 /* VariableDeclaration */: return emitVariableDeclaration(node); case 192 /* ClassExpression */: return emitClassExpression(node); case 221 /* ClassDeclaration */: return emitClassDeclaration(node); case 222 /* InterfaceDeclaration */: return emitInterfaceDeclaration(node); case 224 /* EnumDeclaration */: return emitEnumDeclaration(node); case 255 /* EnumMember */: return emitEnumMember(node); case 225 /* ModuleDeclaration */: return emitModuleDeclaration(node); case 230 /* ImportDeclaration */: return emitImportDeclaration(node); case 229 /* ImportEqualsDeclaration */: return emitImportEqualsDeclaration(node); case 236 /* ExportDeclaration */: return emitExportDeclaration(node); case 235 /* ExportAssignment */: return emitExportAssignment(node); case 256 /* SourceFile */: return emitSourceFileNode(node); } } function hasDetachedComments(pos) { return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos; } function getLeadingCommentsWithoutDetachedComments() { // get the leading comments from detachedPos var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos); if (detachedCommentsInfo.length - 1) { detachedCommentsInfo.pop(); } else { detachedCommentsInfo = undefined; } return leadingComments; } /** * Determine if the given comment is a triple-slash * * @return true if the comment is a triple-slash comment else false **/ function isTripleSlashComment(comment) { // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text // so that we don't end up computing comment string and doing match for all // comments if (currentText.charCodeAt(comment.pos + 1) === 47 /* slash */ && comment.pos + 2 < comment.end && currentText.charCodeAt(comment.pos + 2) === 47 /* slash */) { var textSubStr = currentText.substring(comment.pos, comment.end); return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) || textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ? true : false; } return false; } function getLeadingCommentsToEmit(node) { // Emit the leading comments only if the parent's pos doesn't match because parent should take care of emitting these comments if (node.parent) { if (node.parent.kind === 256 /* SourceFile */ || node.pos !== node.parent.pos) { if (hasDetachedComments(node.pos)) { // get comments without detached comments return getLeadingCommentsWithoutDetachedComments(); } else { // get the leading comments from the node return ts.getLeadingCommentRangesOfNodeFromText(node, currentText); } } } } function getTrailingCommentsToEmit(node) { // Emit the trailing comments only if the parent's pos doesn't match because parent should take care of emitting these comments if (node.parent) { if (node.parent.kind === 256 /* SourceFile */ || node.end !== node.parent.end) { return ts.getTrailingCommentRanges(currentText, node.end); } } } /** * Emit comments associated with node that will not be emitted into JS file */ function emitCommentsOnNotEmittedNode(node) { emitLeadingCommentsWorker(node, /*isEmittedNode*/ false); } function emitLeadingComments(node) { return emitLeadingCommentsWorker(node, /*isEmittedNode*/ true); } function emitLeadingCommentsWorker(node, isEmittedNode) { if (compilerOptions.removeComments) { return; } var leadingComments; if (isEmittedNode) { leadingComments = getLeadingCommentsToEmit(node); } else { // If the node will not be emitted in JS, remove all the comments(normal, pinned and ///) associated with the node, // unless it is a triple slash comment at the top of the file. // For Example: // /// <reference-path ...> // declare var x; // /// <reference-path ...> // interface F {} // The first /// will NOT be removed while the second one will be removed even though both node will not be emitted if (node.pos === 0) { leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment); } } ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments); // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment); } function emitTrailingComments(node) { if (compilerOptions.removeComments) { return; } // Emit the trailing comments only if the parent's end doesn't match var trailingComments = getTrailingCommentsToEmit(node); // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/ ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ false, newLine, writeComment); } /** * Emit trailing comments at the position. The term trailing comment is used here to describe following comment: * x, /comment1/ y * ^ => pos; the function will emit "comment1" in the emitJS */ function emitTrailingCommentsOfPosition(pos) { if (compilerOptions.removeComments) { return; } var trailingComments = ts.getTrailingCommentRanges(currentText, pos); // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/ ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ true, newLine, writeComment); } function emitLeadingCommentsOfPositionWorker(pos) { if (compilerOptions.removeComments) { return; } var leadingComments; if (hasDetachedComments(pos)) { // get comments without detached comments leadingComments = getLeadingCommentsWithoutDetachedComments(); } else { // get the leading comments from the node leadingComments = ts.getLeadingCommentRanges(currentText, pos); } ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments); // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment); } function emitDetachedCommentsAndUpdateCommentsInfo(node) { var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments); if (currentDetachedCommentInfo) { if (detachedCommentsInfo) { detachedCommentsInfo.push(currentDetachedCommentInfo); } else { detachedCommentsInfo = [currentDetachedCommentInfo]; } } } function writeComment(text, lineMap, writer, comment, newLine) { emitPos(comment.pos); ts.writeCommentRange(text, lineMap, writer, comment, newLine); emitPos(comment.end); } function emitShebang() { var shebang = ts.getShebang(currentText); if (shebang) { write(shebang); writeLine(); } } var _a, _b; } function emitFile(_a, sourceFiles, isBundledEmit, emitOnlyDtsFiles) { var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath; if (!emitOnlyDtsFiles) { // Make sure not to write js File and source map file if any of them cannot be written if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) { emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit); } else { emitSkipped = true; } } if (declarationFilePath) { emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics, emitOnlyDtsFiles) || emitSkipped; } if (!emitSkipped && emittedFilesList) { if (!emitOnlyDtsFiles) { emittedFilesList.push(jsFilePath); if (sourceMapFilePath) { emittedFilesList.push(sourceMapFilePath); } } if (declarationFilePath) { emittedFilesList.push(declarationFilePath); } } } }
javascript
function emitFiles(resolver, host, targetSourceFile, emitOnlyDtsFiles) { // emit output for the __extends helper function var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n function __() { this.constructor = d; }\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};"; var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n for (var s, i = 1, n = arguments.length; i < n; i++) {\n s = arguments[i];\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n t[p] = s[p];\n }\n return t;\n};"; // emit output for the __decorate helper function var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n return c > 3 && r && Object.defineProperty(target, key, r), r;\n};"; // emit output for the __metadata helper function var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};"; // emit output for the __param helper function var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n return function (target, key) { decorator(target, key, paramIndex); }\n};"; var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n step((generator = generator.apply(thisArg, _arguments)).next());\n });\n};"; var compilerOptions = host.getCompilerOptions(); var languageVersion = ts.getEmitScriptTarget(compilerOptions); var modulekind = ts.getEmitModuleKind(compilerOptions); var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined; var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined; var emitterDiagnostics = ts.createDiagnosticCollection(); var emitSkipped = false; var newLine = host.getNewLine(); var emitJavaScript = createFileEmitter(); ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile, emitOnlyDtsFiles); return { emitSkipped: emitSkipped, diagnostics: emitterDiagnostics.getDiagnostics(), emittedFiles: emittedFilesList, sourceMaps: sourceMapDataList }; function isUniqueLocalName(name, container) { for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) { if (node.locals && name in node.locals) { // We conservatively include alias symbols to cover cases where they're emitted as locals if (node.locals[name].flags & (107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */)) { return false; } } } return true; } function setLabeledJump(state, isBreak, labelText, labelMarker) { if (isBreak) { if (!state.labeledNonLocalBreaks) { state.labeledNonLocalBreaks = ts.createMap(); } state.labeledNonLocalBreaks[labelText] = labelMarker; } else { if (!state.labeledNonLocalContinues) { state.labeledNonLocalContinues = ts.createMap(); } state.labeledNonLocalContinues[labelText] = labelMarker; } } function hoistVariableDeclarationFromLoop(state, declaration) { if (!state.hoistedLocalVariables) { state.hoistedLocalVariables = []; } visit(declaration.name); function visit(node) { if (node.kind === 69 /* Identifier */) { state.hoistedLocalVariables.push(node); } else { for (var _a = 0, _b = node.elements; _a < _b.length; _a++) { var element = _b[_a]; visit(element.name); } } } } function createFileEmitter() { var writer = ts.createTextWriter(newLine); var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent; var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter(); var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos; var currentSourceFile; var currentText; var currentLineMap; var currentFileIdentifiers; var renamedDependencies; var isEs6Module; var isCurrentFileExternalModule; // name of an exporter function if file is a System external module // System.register([...], function (<exporter>) {...}) // exporting in System modules looks like: // export var x; ... x = 1 // => // var x;... exporter("x", x = 1) var exportFunctionForFile; var contextObjectForFile; var generatedNameSet; var nodeToGeneratedName; var computedPropertyNamesToGeneratedNames; var decoratedClassAliases; var convertedLoopState; var extendsEmitted; var assignEmitted; var decorateEmitted; var paramEmitted; var awaiterEmitted; var tempFlags = 0; var tempVariables; var tempParameters; var externalImports; var exportSpecifiers; var exportEquals; var hasExportStarsToExportValues; var detachedCommentsInfo; /** Sourcemap data that will get encoded */ var sourceMapData; /** Is the file being emitted into its own file */ var isOwnFileEmit; /** If removeComments is true, no leading-comments needed to be emitted **/ var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker; var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { }; var moduleEmitDelegates = ts.createMap((_a = {}, _a[ts.ModuleKind.ES6] = emitES6Module, _a[ts.ModuleKind.AMD] = emitAMDModule, _a[ts.ModuleKind.System] = emitSystemModule, _a[ts.ModuleKind.UMD] = emitUMDModule, _a[ts.ModuleKind.CommonJS] = emitCommonJSModule, _a )); var bundleEmitDelegates = ts.createMap((_b = {}, _b[ts.ModuleKind.ES6] = function () { }, _b[ts.ModuleKind.AMD] = emitAMDModule, _b[ts.ModuleKind.System] = emitSystemModule, _b[ts.ModuleKind.UMD] = function () { }, _b[ts.ModuleKind.CommonJS] = function () { }, _b )); return doEmit; function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) { sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit); generatedNameSet = ts.createMap(); nodeToGeneratedName = []; decoratedClassAliases = []; isOwnFileEmit = !isBundledEmit; // Emit helpers from all the files if (isBundledEmit && modulekind) { ts.forEach(sourceFiles, emitEmitHelpers); } // Do not call emit directly. It does not set the currentSourceFile. ts.forEach(sourceFiles, emitSourceFile); writeLine(); var sourceMappingURL = sourceMap.getSourceMappingURL(); if (sourceMappingURL) { write("//# " + "sourceMappingURL" + "=" + sourceMappingURL); // Sometimes tools can sometimes see this line as a source mapping url comment } writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, /*writeByteOrderMark*/ compilerOptions.emitBOM, sourceFiles); // reset the state sourceMap.reset(); writer.reset(); currentSourceFile = undefined; currentText = undefined; currentLineMap = undefined; exportFunctionForFile = undefined; contextObjectForFile = undefined; generatedNameSet = undefined; nodeToGeneratedName = undefined; decoratedClassAliases = undefined; computedPropertyNamesToGeneratedNames = undefined; convertedLoopState = undefined; extendsEmitted = false; decorateEmitted = false; paramEmitted = false; awaiterEmitted = false; assignEmitted = false; tempFlags = 0; tempVariables = undefined; tempParameters = undefined; externalImports = undefined; exportSpecifiers = undefined; exportEquals = undefined; hasExportStarsToExportValues = undefined; detachedCommentsInfo = undefined; sourceMapData = undefined; isEs6Module = false; renamedDependencies = undefined; isCurrentFileExternalModule = false; } function emitSourceFile(sourceFile) { currentSourceFile = sourceFile; currentText = sourceFile.text; currentLineMap = ts.getLineStarts(sourceFile); exportFunctionForFile = undefined; contextObjectForFile = undefined; isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"]; renamedDependencies = sourceFile.renamedDependencies; currentFileIdentifiers = sourceFile.identifiers; isCurrentFileExternalModule = ts.isExternalModule(sourceFile); setSourceFile(sourceFile); emitNodeWithCommentsAndWithoutSourcemap(sourceFile); } function isUniqueName(name) { return !resolver.hasGlobalName(name) && !(name in currentFileIdentifiers) && !(name in generatedNameSet); } // Return the next available name in the pattern _a ... _z, _0, _1, ... // TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name. // Note that names generated by makeTempVariableName and makeUniqueName will never conflict. function makeTempVariableName(flags) { if (flags && !(tempFlags & flags)) { var name_24 = flags === 268435456 /* _i */ ? "_i" : "_n"; if (isUniqueName(name_24)) { tempFlags |= flags; return name_24; } } while (true) { var count = tempFlags & 268435455 /* CountMask */; tempFlags++; // Skip over 'i' and 'n' if (count !== 8 && count !== 13) { var name_25 = count < 26 ? "_" + String.fromCharCode(97 /* a */ + count) : "_" + (count - 26); if (isUniqueName(name_25)) { return name_25; } } } } // Generate a name that is unique within the current file and doesn't conflict with any names // in global scope. The name is formed by adding an '_n' suffix to the specified base name, // where n is a positive integer. Note that names generated by makeTempVariableName and // makeUniqueName are guaranteed to never conflict. function makeUniqueName(baseName) { // Find the first unique 'name_n', where n is a positive number if (baseName.charCodeAt(baseName.length - 1) !== 95 /* _ */) { baseName += "_"; } var i = 1; while (true) { var generatedName = baseName + i; if (isUniqueName(generatedName)) { return generatedNameSet[generatedName] = generatedName; } i++; } } function generateNameForModuleOrEnum(node) { var name = node.name.text; // Use module/enum name itself if it is unique, otherwise make a unique variation return isUniqueLocalName(name, node) ? name : makeUniqueName(name); } function generateNameForImportOrExportDeclaration(node) { var expr = ts.getExternalModuleName(node); var baseName = expr.kind === 9 /* StringLiteral */ ? ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module"; return makeUniqueName(baseName); } function generateNameForExportDefault() { return makeUniqueName("default"); } function generateNameForClassExpression() { return makeUniqueName("class"); } function generateNameForNode(node) { switch (node.kind) { case 69 /* Identifier */: return makeUniqueName(node.text); case 225 /* ModuleDeclaration */: case 224 /* EnumDeclaration */: return generateNameForModuleOrEnum(node); case 230 /* ImportDeclaration */: case 236 /* ExportDeclaration */: return generateNameForImportOrExportDeclaration(node); case 220 /* FunctionDeclaration */: case 221 /* ClassDeclaration */: case 235 /* ExportAssignment */: return generateNameForExportDefault(); case 192 /* ClassExpression */: return generateNameForClassExpression(); default: ts.Debug.fail(); } } function getGeneratedNameForNode(node) { var id = ts.getNodeId(node); return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node))); } /** Write emitted output to disk */ function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) { if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) { ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles); } if (sourceMapDataList) { sourceMapDataList.push(sourceMap.getSourceMapData()); } ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles); } // Create a temporary variable with a unique unused name. function createTempVariable(flags) { var result = ts.createSynthesizedNode(69 /* Identifier */); result.text = makeTempVariableName(flags); return result; } function recordTempDeclaration(name) { if (!tempVariables) { tempVariables = []; } tempVariables.push(name); } function createAndRecordTempVariable(flags) { var temp = createTempVariable(flags); recordTempDeclaration(temp); return temp; } function emitTempDeclarations(newLine) { if (tempVariables) { if (newLine) { writeLine(); } else { write(" "); } write("var "); emitCommaList(tempVariables); write(";"); } } /** Emit the text for the given token that comes after startPos * This by default writes the text provided with the given tokenKind * but if optional emitFn callback is provided the text is emitted using the callback instead of default text * @param tokenKind the kind of the token to search and emit * @param startPos the position in the source to start searching for the token * @param emitFn if given will be invoked to emit the text instead of actual token emit */ function emitToken(tokenKind, startPos, emitFn) { var tokenStartPos = ts.skipTrivia(currentText, startPos); emitPos(tokenStartPos); var tokenString = ts.tokenToString(tokenKind); if (emitFn) { emitFn(); } else { write(tokenString); } var tokenEndPos = tokenStartPos + tokenString.length; emitPos(tokenEndPos); return tokenEndPos; } function emitOptional(prefix, node) { if (node) { write(prefix); emit(node); } } function emitParenthesizedIf(node, parenthesized) { if (parenthesized) { write("("); } emit(node); if (parenthesized) { write(")"); } } function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) { ts.Debug.assert(nodes.length > 0); increaseIndent(); if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) { if (spacesBetweenBraces) { write(" "); } } else { writeLine(); } for (var i = 0, n = nodes.length; i < n; i++) { if (i) { if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) { write(", "); } else { write(","); writeLine(); } } emit(nodes[i]); } if (nodes.hasTrailingComma && allowTrailingComma) { write(","); } decreaseIndent(); if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) { if (spacesBetweenBraces) { write(" "); } } else { writeLine(); } } function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) { if (!emitNode) { emitNode = emit; } for (var i = 0; i < count; i++) { if (multiLine) { if (i || leadingComma) { write(","); } writeLine(); } else { if (i || leadingComma) { write(", "); } } var node = nodes[start + i]; // This emitting is to make sure we emit following comment properly // ...(x, /*comment1*/ y)... // ^ => node.pos // "comment1" is not considered leading comment for "y" but rather // considered as trailing comment of the previous node. emitTrailingCommentsOfPosition(node.pos); emitNode(node); leadingComma = true; } if (trailingComma) { write(","); } if (multiLine && !noTrailingNewLine) { writeLine(); } return count; } function emitCommaList(nodes) { if (nodes) { emitList(nodes, 0, nodes.length, /*multiLine*/ false, /*trailingComma*/ false); } } function emitLines(nodes) { emitLinesStartingAt(nodes, /*startIndex*/ 0); } function emitLinesStartingAt(nodes, startIndex) { for (var i = startIndex; i < nodes.length; i++) { writeLine(); emit(nodes[i]); } } function isBinaryOrOctalIntegerLiteral(node, text) { if (node.kind === 8 /* NumericLiteral */ && text.length > 1) { switch (text.charCodeAt(1)) { case 98 /* b */: case 66 /* B */: case 111 /* o */: case 79 /* O */: return true; } } return false; } function emitLiteral(node) { var text = getLiteralText(node); if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 /* StringLiteral */ || ts.isTemplateLiteralKind(node.kind))) { writer.writeLiteral(text); } else if (languageVersion < 2 /* ES6 */ && isBinaryOrOctalIntegerLiteral(node, text)) { write(node.text); } else { write(text); } } function getLiteralText(node) { // Any template literal or string literal with an extended escape // (e.g. "\u{0067}") will need to be downleveled as a escaped string literal. if (languageVersion < 2 /* ES6 */ && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) { return getQuotedEscapedLiteralText('"', node.text, '"'); } // If we don't need to downlevel and we can reach the original source text using // the node's parent reference, then simply get the text as it was originally written. if (node.parent) { return ts.getTextOfNodeFromSourceText(currentText, node); } // If we can't reach the original source text, use the canonical form if it's a number, // or an escaped quoted form of the original text if it's string-like. switch (node.kind) { case 9 /* StringLiteral */: return getQuotedEscapedLiteralText('"', node.text, '"'); case 11 /* NoSubstitutionTemplateLiteral */: return getQuotedEscapedLiteralText("`", node.text, "`"); case 12 /* TemplateHead */: return getQuotedEscapedLiteralText("`", node.text, "${"); case 13 /* TemplateMiddle */: return getQuotedEscapedLiteralText("}", node.text, "${"); case 14 /* TemplateTail */: return getQuotedEscapedLiteralText("}", node.text, "`"); case 8 /* NumericLiteral */: return node.text; } ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for."); } function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) { return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote; } function emitDownlevelRawTemplateLiteral(node) { // Find original source text, since we need to emit the raw strings of the tagged template. // The raw strings contain the (escaped) strings of what the user wrote. // Examples: `\n` is converted to "\\n", a template string with a newline to "\n". var text = ts.getTextOfNodeFromSourceText(currentText, node); // text contains the original source, it will also contain quotes ("`"), dollar signs and braces ("${" and "}"), // thus we need to remove those characters. // First template piece starts with "`", others with "}" // Last template piece ends with "`", others with "${" var isLast = node.kind === 11 /* NoSubstitutionTemplateLiteral */ || node.kind === 14 /* TemplateTail */; text = text.substring(1, text.length - (isLast ? 1 : 2)); // Newline normalization: // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV. text = text.replace(/\r\n?/g, "\n"); text = ts.escapeString(text); write("\"" + text + "\""); } function emitDownlevelTaggedTemplateArray(node, literalEmitter) { write("["); if (node.template.kind === 11 /* NoSubstitutionTemplateLiteral */) { literalEmitter(node.template); } else { literalEmitter(node.template.head); ts.forEach(node.template.templateSpans, function (child) { write(", "); literalEmitter(child.literal); }); } write("]"); } function emitDownlevelTaggedTemplate(node) { var tempVariable = createAndRecordTempVariable(0 /* Auto */); write("("); emit(tempVariable); write(" = "); emitDownlevelTaggedTemplateArray(node, emit); write(", "); emit(tempVariable); write(".raw = "); emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral); write(", "); emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag)); write("("); emit(tempVariable); // Now we emit the expressions if (node.template.kind === 189 /* TemplateExpression */) { ts.forEach(node.template.templateSpans, function (templateSpan) { write(", "); var needsParens = templateSpan.expression.kind === 187 /* BinaryExpression */ && templateSpan.expression.operatorToken.kind === 24 /* CommaToken */; emitParenthesizedIf(templateSpan.expression, needsParens); }); } write("))"); } function emitTemplateExpression(node) { // In ES6 mode and above, we can simply emit each portion of a template in order, but in // ES3 & ES5 we must convert the template expression into a series of string concatenations. if (languageVersion >= 2 /* ES6 */) { ts.forEachChild(node, emit); return; } var emitOuterParens = ts.isExpression(node.parent) && templateNeedsParens(node, node.parent); if (emitOuterParens) { write("("); } var headEmitted = false; if (shouldEmitTemplateHead()) { emitLiteral(node.head); headEmitted = true; } for (var i = 0, n = node.templateSpans.length; i < n; i++) { var templateSpan = node.templateSpans[i]; // Check if the expression has operands and binds its operands less closely than binary '+'. // If it does, we need to wrap the expression in parentheses. Otherwise, something like // `abc${ 1 << 2 }` // becomes // "abc" + 1 << 2 + "" // which is really // ("abc" + 1) << (2 + "") // rather than // "abc" + (1 << 2) + "" var needsParens = templateSpan.expression.kind !== 178 /* ParenthesizedExpression */ && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1 /* GreaterThan */; if (i > 0 || headEmitted) { // If this is the first span and the head was not emitted, then this templateSpan's // expression will be the first to be emitted. Don't emit the preceding ' + ' in that // case. write(" + "); } emitParenthesizedIf(templateSpan.expression, needsParens); // Only emit if the literal is non-empty. // The binary '+' operator is left-associative, so the first string concatenation // with the head will force the result up to this point to be a string. // Emitting a '+ ""' has no semantic effect for middles and tails. if (templateSpan.literal.text.length !== 0) { write(" + "); emitLiteral(templateSpan.literal); } } if (emitOuterParens) { write(")"); } function shouldEmitTemplateHead() { // If this expression has an empty head literal and the first template span has a non-empty // literal, then emitting the empty head literal is not necessary. // `${ foo } and ${ bar }` // can be emitted as // foo + " and " + bar // This is because it is only required that one of the first two operands in the emit // output must be a string literal, so that the other operand and all following operands // are forced into strings. // // If the first template span has an empty literal, then the head must still be emitted. // `${ foo }${ bar }` // must still be emitted as // "" + foo + bar // There is always atleast one templateSpan in this code path, since // NoSubstitutionTemplateLiterals are directly emitted via emitLiteral() ts.Debug.assert(node.templateSpans.length !== 0); return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0; } function templateNeedsParens(template, parent) { switch (parent.kind) { case 174 /* CallExpression */: case 175 /* NewExpression */: return parent.expression === template; case 176 /* TaggedTemplateExpression */: case 178 /* ParenthesizedExpression */: return false; default: return comparePrecedenceToBinaryPlus(parent) !== -1 /* LessThan */; } } /** * Returns whether the expression has lesser, greater, * or equal precedence to the binary '+' operator */ function comparePrecedenceToBinaryPlus(expression) { // All binary expressions have lower precedence than '+' apart from '*', '/', and '%' // which have greater precedence and '-' which has equal precedence. // All unary operators have a higher precedence apart from yield. // Arrow functions and conditionals have a lower precedence, // although we convert the former into regular function expressions in ES5 mode, // and in ES6 mode this function won't get called anyway. // // TODO (drosen): Note that we need to account for the upcoming 'yield' and // spread ('...') unary operators that are anticipated for ES6. switch (expression.kind) { case 187 /* BinaryExpression */: switch (expression.operatorToken.kind) { case 37 /* AsteriskToken */: case 39 /* SlashToken */: case 40 /* PercentToken */: return 1 /* GreaterThan */; case 35 /* PlusToken */: case 36 /* MinusToken */: return 0 /* EqualTo */; default: return -1 /* LessThan */; } case 190 /* YieldExpression */: case 188 /* ConditionalExpression */: return -1 /* LessThan */; default: return 1 /* GreaterThan */; } } } function emitTemplateSpan(span) { emit(span.expression); emit(span.literal); } function jsxEmitReact(node) { /// Emit a tag name, which is either '"div"' for lower-cased names, or /// 'Div' for upper-cased or dotted names function emitTagName(name) { if (name.kind === 69 /* Identifier */ && ts.isIntrinsicJsxName(name.text)) { write('"'); emit(name); write('"'); } else { emit(name); } } /// Emit an attribute name, which is quoted if it needs to be quoted. Because /// these emit into an object literal property name, we don't need to be worried /// about keywords, just non-identifier characters function emitAttributeName(name) { if (/^[A-Za-z_]\w*$/.test(name.text)) { emit(name); } else { write('"'); emit(name); write('"'); } } /// Emit an name/value pair for an attribute (e.g. "x: 3") function emitJsxAttribute(node) { emitAttributeName(node.name); write(": "); if (node.initializer) { emit(node.initializer); } else { write("true"); } } function emitJsxElement(openingNode, children) { var syntheticReactRef = ts.createSynthesizedNode(69 /* Identifier */); syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React"; syntheticReactRef.parent = openingNode; // Call React.createElement(tag, ... emitLeadingComments(openingNode); emitExpressionIdentifier(syntheticReactRef); write(".createElement("); emitTagName(openingNode.tagName); write(", "); // Attribute list if (openingNode.attributes.length === 0) { // When there are no attributes, React wants "null" write("null"); } else { // Either emit one big object literal (no spread attribs), or // a call to the __assign helper var attrs = openingNode.attributes; if (ts.forEach(attrs, function (attr) { return attr.kind === 247 /* JsxSpreadAttribute */; })) { write("__assign("); var haveOpenedObjectLiteral = false; for (var i = 0; i < attrs.length; i++) { if (attrs[i].kind === 247 /* JsxSpreadAttribute */) { // If this is the first argument, we need to emit a {} as the first argument if (i === 0) { write("{}, "); } if (haveOpenedObjectLiteral) { write("}"); haveOpenedObjectLiteral = false; } if (i > 0) { write(", "); } emit(attrs[i].expression); } else { ts.Debug.assert(attrs[i].kind === 246 /* JsxAttribute */); if (haveOpenedObjectLiteral) { write(", "); } else { haveOpenedObjectLiteral = true; if (i > 0) { write(", "); } write("{"); } emitJsxAttribute(attrs[i]); } } if (haveOpenedObjectLiteral) write("}"); write(")"); // closing paren to React.__spread( } else { // One object literal with all the attributes in them write("{"); for (var i = 0, n = attrs.length; i < n; i++) { if (i > 0) { write(", "); } emitJsxAttribute(attrs[i]); } write("}"); } } // Children if (children) { var firstChild = void 0; var multipleEmittableChildren = false; for (var i = 0, n = children.length; i < n; i++) { var jsxChild = children[i]; if (isJsxChildEmittable(jsxChild)) { // we need to decide whether to emit in single line or multiple lines as indented list // store firstChild reference, if we see another emittable child, then emit accordingly if (!firstChild) { write(", "); firstChild = jsxChild; } else { // more than one emittable child, emit indented list if (!multipleEmittableChildren) { multipleEmittableChildren = true; increaseIndent(); writeLine(); emit(firstChild); } write(", "); writeLine(); emit(jsxChild); } } } if (multipleEmittableChildren) { decreaseIndent(); } else if (firstChild) { if (firstChild.kind !== 241 /* JsxElement */ && firstChild.kind !== 242 /* JsxSelfClosingElement */) { emit(firstChild); } else { // If the only child is jsx element, put it on a new indented line increaseIndent(); writeLine(); emit(firstChild); writeLine(); decreaseIndent(); } } } // Closing paren write(")"); // closes "React.createElement(" emitTrailingComments(openingNode); } if (node.kind === 241 /* JsxElement */) { emitJsxElement(node.openingElement, node.children); } else { ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */); emitJsxElement(node); } } function jsxEmitPreserve(node) { function emitJsxAttribute(node) { emit(node.name); if (node.initializer) { write("="); emit(node.initializer); } } function emitJsxSpreadAttribute(node) { write("{..."); emit(node.expression); write("}"); } function emitAttributes(attribs) { for (var i = 0, n = attribs.length; i < n; i++) { if (i > 0) { write(" "); } if (attribs[i].kind === 247 /* JsxSpreadAttribute */) { emitJsxSpreadAttribute(attribs[i]); } else { ts.Debug.assert(attribs[i].kind === 246 /* JsxAttribute */); emitJsxAttribute(attribs[i]); } } } function emitJsxOpeningOrSelfClosingElement(node) { write("<"); emit(node.tagName); if (node.attributes.length > 0 || (node.kind === 242 /* JsxSelfClosingElement */)) { write(" "); } emitAttributes(node.attributes); if (node.kind === 242 /* JsxSelfClosingElement */) { write("/>"); } else { write(">"); } } function emitJsxClosingElement(node) { write("</"); emit(node.tagName); write(">"); } function emitJsxElement(node) { emitJsxOpeningOrSelfClosingElement(node.openingElement); for (var i = 0, n = node.children.length; i < n; i++) { emit(node.children[i]); } emitJsxClosingElement(node.closingElement); } if (node.kind === 241 /* JsxElement */) { emitJsxElement(node); } else { ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */); emitJsxOpeningOrSelfClosingElement(node); } } // This function specifically handles numeric/string literals for enum and accessor 'identifiers'. // In a sense, it does not actually emit identifiers as much as it declares a name for a specific property. // For example, this is utilized when feeding in a result to Object.defineProperty. function emitExpressionForPropertyName(node) { ts.Debug.assert(node.kind !== 169 /* BindingElement */); if (node.kind === 9 /* StringLiteral */) { emitLiteral(node); } else if (node.kind === 140 /* ComputedPropertyName */) { // if this is a decorated computed property, we will need to capture the result // of the property expression so that we can apply decorators later. This is to ensure // we don't introduce unintended side effects: // // class C { // [_a = x]() { } // } // // The emit for the decorated computed property decorator is: // // __decorate([dec], C.prototype, _a, Object.getOwnPropertyDescriptor(C.prototype, _a)); // if (ts.nodeIsDecorated(node.parent)) { if (!computedPropertyNamesToGeneratedNames) { computedPropertyNamesToGeneratedNames = []; } var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)]; if (generatedName) { // we have already generated a variable for this node, write that value instead. write(generatedName); return; } generatedName = createAndRecordTempVariable(0 /* Auto */).text; computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName; write(generatedName); write(" = "); } emit(node.expression); } else { write('"'); if (node.kind === 8 /* NumericLiteral */) { write(node.text); } else { writeTextOfNode(currentText, node); } write('"'); } } function isExpressionIdentifier(node) { var parent = node.parent; switch (parent.kind) { case 170 /* ArrayLiteralExpression */: case 195 /* AsExpression */: case 184 /* AwaitExpression */: case 187 /* BinaryExpression */: case 174 /* CallExpression */: case 249 /* CaseClause */: case 140 /* ComputedPropertyName */: case 188 /* ConditionalExpression */: case 143 /* Decorator */: case 181 /* DeleteExpression */: case 204 /* DoStatement */: case 173 /* ElementAccessExpression */: case 235 /* ExportAssignment */: case 202 /* ExpressionStatement */: case 194 /* ExpressionWithTypeArguments */: case 206 /* ForStatement */: case 207 /* ForInStatement */: case 208 /* ForOfStatement */: case 203 /* IfStatement */: case 245 /* JsxClosingElement */: case 242 /* JsxSelfClosingElement */: case 243 /* JsxOpeningElement */: case 247 /* JsxSpreadAttribute */: case 248 /* JsxExpression */: case 175 /* NewExpression */: case 196 /* NonNullExpression */: case 178 /* ParenthesizedExpression */: case 186 /* PostfixUnaryExpression */: case 185 /* PrefixUnaryExpression */: case 211 /* ReturnStatement */: case 254 /* ShorthandPropertyAssignment */: case 191 /* SpreadElementExpression */: case 213 /* SwitchStatement */: case 176 /* TaggedTemplateExpression */: case 197 /* TemplateSpan */: case 215 /* ThrowStatement */: case 177 /* TypeAssertionExpression */: case 182 /* TypeOfExpression */: case 183 /* VoidExpression */: case 205 /* WhileStatement */: case 212 /* WithStatement */: case 190 /* YieldExpression */: return true; case 169 /* BindingElement */: case 255 /* EnumMember */: case 142 /* Parameter */: case 253 /* PropertyAssignment */: case 145 /* PropertyDeclaration */: case 218 /* VariableDeclaration */: return parent.initializer === node; case 172 /* PropertyAccessExpression */: return parent.expression === node; case 180 /* ArrowFunction */: case 179 /* FunctionExpression */: return parent.body === node; case 229 /* ImportEqualsDeclaration */: return parent.moduleReference === node; case 139 /* QualifiedName */: return parent.left === node; } return false; } function emitExpressionIdentifier(node) { var container = resolver.getReferencedExportContainer(node); if (container) { if (container.kind === 256 /* SourceFile */) { // Identifier references module export if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) { write("exports."); } } else { // Identifier references namespace export write(getGeneratedNameForNode(container)); write("."); } } else { if (modulekind !== ts.ModuleKind.ES6) { var declaration = resolver.getReferencedImportDeclaration(node); if (declaration) { if (declaration.kind === 231 /* ImportClause */) { // Identifier references default import write(getGeneratedNameForNode(declaration.parent)); write(languageVersion === 0 /* ES3 */ ? '["default"]' : ".default"); return; } else if (declaration.kind === 234 /* ImportSpecifier */) { // Identifier references named import write(getGeneratedNameForNode(declaration.parent.parent.parent)); var name_26 = declaration.propertyName || declaration.name; var identifier = ts.getTextOfNodeFromSourceText(currentText, name_26); if (languageVersion === 0 /* ES3 */ && identifier === "default") { write('["default"]'); } else { write("."); write(identifier); } return; } } } if (languageVersion < 2 /* ES6 */) { var declaration = resolver.getReferencedDeclarationWithCollidingName(node); if (declaration) { write(getGeneratedNameForNode(declaration.name)); return; } } else if (resolver.getNodeCheckFlags(node) & 1048576 /* BodyScopedClassBinding */) { // Due to the emit for class decorators, any reference to the class from inside of the class body // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind // behavior of class names in ES6. var declaration = resolver.getReferencedValueDeclaration(node); if (declaration) { var classAlias = decoratedClassAliases[ts.getNodeId(declaration)]; if (classAlias !== undefined) { write(classAlias); return; } } } } if (ts.nodeIsSynthesized(node)) { write(node.text); } else { writeTextOfNode(currentText, node); } } function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) { if (languageVersion < 2 /* ES6 */) { var parent_13 = node.parent; switch (parent_13.kind) { case 169 /* BindingElement */: case 221 /* ClassDeclaration */: case 224 /* EnumDeclaration */: case 218 /* VariableDeclaration */: return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13); } } return false; } function getClassExpressionInPropertyAccessInStaticPropertyDeclaration(node) { if (languageVersion >= 2 /* ES6 */) { var parent_14 = node.parent; if (parent_14.kind === 172 /* PropertyAccessExpression */ && parent_14.expression === node) { parent_14 = parent_14.parent; while (parent_14 && parent_14.kind !== 145 /* PropertyDeclaration */) { parent_14 = parent_14.parent; } return parent_14 && parent_14.kind === 145 /* PropertyDeclaration */ && (parent_14.flags & 32 /* Static */) !== 0 && parent_14.parent.kind === 192 /* ClassExpression */ ? parent_14.parent : undefined; } } return undefined; } function emitIdentifier(node) { if (convertedLoopState) { if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) { // in converted loop body arguments cannot be used directly. var name_27 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments")); write(name_27); return; } } if (!node.parent) { write(node.text); } else if (isExpressionIdentifier(node)) { var classExpression = getClassExpressionInPropertyAccessInStaticPropertyDeclaration(node); if (classExpression) { var declaration = resolver.getReferencedValueDeclaration(node); if (declaration === classExpression) { write(getGeneratedNameForNode(declaration.name)); return; } } emitExpressionIdentifier(node); } else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) { write(getGeneratedNameForNode(node)); } else if (ts.nodeIsSynthesized(node)) { write(node.text); } else { writeTextOfNode(currentText, node); } } function emitThis(node) { if (resolver.getNodeCheckFlags(node) & 2 /* LexicalThis */) { write("_this"); } else if (convertedLoopState) { write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this"))); } else { write("this"); } } function emitSuper(node) { if (languageVersion >= 2 /* ES6 */) { write("super"); } else { var flags = resolver.getNodeCheckFlags(node); if (flags & 256 /* SuperInstance */) { write("_super.prototype"); } else { write("_super"); } } } function emitObjectBindingPattern(node) { write("{ "); var elements = node.elements; emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma); write(" }"); } function emitArrayBindingPattern(node) { write("["); var elements = node.elements; emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma); write("]"); } function emitBindingElement(node) { if (node.propertyName) { emit(node.propertyName); write(": "); } if (node.dotDotDotToken) { write("..."); } if (ts.isBindingPattern(node.name)) { emit(node.name); } else { emitModuleMemberName(node); } emitOptional(" = ", node.initializer); } function emitSpreadElementExpression(node) { write("..."); emit(node.expression); } function emitYieldExpression(node) { write(ts.tokenToString(114 /* YieldKeyword */)); if (node.asteriskToken) { write("*"); } if (node.expression) { write(" "); emit(node.expression); } } function emitAwaitExpression(node) { var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node); if (needsParenthesis) { write("("); } write(ts.tokenToString(114 /* YieldKeyword */)); write(" "); emit(node.expression); if (needsParenthesis) { write(")"); } } function needsParenthesisForAwaitExpressionAsYield(node) { if (node.parent.kind === 187 /* BinaryExpression */ && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) { return true; } else if (node.parent.kind === 188 /* ConditionalExpression */ && node.parent.condition === node) { return true; } else if (node.parent.kind === 185 /* PrefixUnaryExpression */ || node.parent.kind === 181 /* DeleteExpression */ || node.parent.kind === 182 /* TypeOfExpression */ || node.parent.kind === 183 /* VoidExpression */) { return true; } return false; } function needsParenthesisForPropertyAccessOrInvocation(node) { switch (node.kind) { case 69 /* Identifier */: case 170 /* ArrayLiteralExpression */: case 172 /* PropertyAccessExpression */: case 173 /* ElementAccessExpression */: case 174 /* CallExpression */: case 178 /* ParenthesizedExpression */: // This list is not exhaustive and only includes those cases that are relevant // to the check in emitArrayLiteral. More cases can be added as needed. return false; } return true; } function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) { var pos = 0; var group = 0; var length = elements.length; while (pos < length) { // Emit using the pattern <group0>.concat(<group1>, <group2>, ...) if (group === 1 && useConcat) { write(".concat("); } else if (group > 0) { write(", "); } var e = elements[pos]; if (e.kind === 191 /* SpreadElementExpression */) { e = e.expression; emitParenthesizedIf(e, /*parenthesized*/ group === 0 && needsParenthesisForPropertyAccessOrInvocation(e)); pos++; if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170 /* ArrayLiteralExpression */) { write(".slice()"); } } else { var i = pos; while (i < length && elements[i].kind !== 191 /* SpreadElementExpression */) { i++; } write("["); if (multiLine) { increaseIndent(); } emitList(elements, pos, i - pos, multiLine, trailingComma && i === length); if (multiLine) { decreaseIndent(); } write("]"); pos = i; } group++; } if (group > 1) { if (useConcat) { write(")"); } } } function isSpreadElementExpression(node) { return node.kind === 191 /* SpreadElementExpression */; } function emitArrayLiteral(node) { var elements = node.elements; if (elements.length === 0) { write("[]"); } else if (languageVersion >= 2 /* ES6 */ || !ts.forEach(elements, isSpreadElementExpression)) { write("["); emitLinePreservingList(node, node.elements, elements.hasTrailingComma, /*spacesBetweenBraces*/ false); write("]"); } else { emitListWithSpread(elements, /*needsUniqueCopy*/ true, /*multiLine*/ node.multiLine, /*trailingComma*/ elements.hasTrailingComma, /*useConcat*/ true); } } function emitObjectLiteralBody(node, numElements) { if (numElements === 0) { write("{}"); return; } write("{"); if (numElements > 0) { var properties = node.properties; // If we are not doing a downlevel transformation for object literals, // then try to preserve the original shape of the object literal. // Otherwise just try to preserve the formatting. if (numElements === properties.length) { emitLinePreservingList(node, properties, /*allowTrailingComma*/ languageVersion >= 1 /* ES5 */, /*spacesBetweenBraces*/ true); } else { var multiLine = node.multiLine; if (!multiLine) { write(" "); } else { increaseIndent(); } emitList(properties, 0, numElements, /*multiLine*/ multiLine, /*trailingComma*/ false); if (!multiLine) { write(" "); } else { decreaseIndent(); } } } write("}"); } function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) { var multiLine = node.multiLine; var properties = node.properties; write("("); if (multiLine) { increaseIndent(); } // For computed properties, we need to create a unique handle to the object // literal so we can modify it without risking internal assignments tainting the object. var tempVar = createAndRecordTempVariable(0 /* Auto */); // Write out the first non-computed properties // (or all properties if none of them are computed), // then emit the rest through indexing on the temp variable. emit(tempVar); write(" = "); emitObjectLiteralBody(node, firstComputedPropertyIndex); for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) { var property = properties[i]; if (property.kind === 149 /* GetAccessor */ || property.kind === 150 /* SetAccessor */) { // TODO (drosen): Reconcile with 'emitMemberFunctions'. var accessors = ts.getAllAccessorDeclarations(node.properties, property); if (property !== accessors.firstAccessor) { continue; } writeComma(); emitStart(property); write("Object.defineProperty("); emit(tempVar); write(", "); emitStart(property.name); emitExpressionForPropertyName(property.name); emitEnd(property.name); write(", {"); increaseIndent(); if (accessors.getAccessor) { writeLine(); emitLeadingComments(accessors.getAccessor); write("get: "); emitStart(accessors.getAccessor); write("function "); emitSignatureAndBody(accessors.getAccessor); emitEnd(accessors.getAccessor); emitTrailingComments(accessors.getAccessor); write(","); } if (accessors.setAccessor) { writeLine(); emitLeadingComments(accessors.setAccessor); write("set: "); emitStart(accessors.setAccessor); write("function "); emitSignatureAndBody(accessors.setAccessor); emitEnd(accessors.setAccessor); emitTrailingComments(accessors.setAccessor); write(","); } writeLine(); write("enumerable: true,"); writeLine(); write("configurable: true"); decreaseIndent(); writeLine(); write("})"); emitEnd(property); } else { writeComma(); emitStart(property); emitLeadingComments(property); emitStart(property.name); emit(tempVar); emitMemberAccessForPropertyName(property.name); emitEnd(property.name); write(" = "); if (property.kind === 253 /* PropertyAssignment */) { emit(property.initializer); } else if (property.kind === 254 /* ShorthandPropertyAssignment */) { emitExpressionIdentifier(property.name); } else if (property.kind === 147 /* MethodDeclaration */) { emitFunctionDeclaration(property); } else { ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind); } emitEnd(property); } } writeComma(); emit(tempVar); if (multiLine) { decreaseIndent(); writeLine(); } write(")"); function writeComma() { if (multiLine) { write(","); writeLine(); } else { write(", "); } } } function emitObjectLiteral(node) { var properties = node.properties; if (languageVersion < 2 /* ES6 */) { var numProperties = properties.length; // Find the first computed property. // Everything until that point can be emitted as part of the initial object literal. var numInitialNonComputedProperties = numProperties; for (var i = 0, n = properties.length; i < n; i++) { if (properties[i].name.kind === 140 /* ComputedPropertyName */) { numInitialNonComputedProperties = i; break; } } var hasComputedProperty = numInitialNonComputedProperties !== properties.length; if (hasComputedProperty) { emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties); return; } } // Ordinary case: either the object has no computed properties // or we're compiling with an ES6+ target. emitObjectLiteralBody(node, properties.length); } function createBinaryExpression(left, operator, right, startsOnNewLine) { var result = ts.createSynthesizedNode(187 /* BinaryExpression */, startsOnNewLine); result.operatorToken = ts.createSynthesizedNode(operator); result.left = left; result.right = right; return result; } function createPropertyAccessExpression(expression, name) { var result = ts.createSynthesizedNode(172 /* PropertyAccessExpression */); result.expression = parenthesizeForAccess(expression); result.name = name; return result; } function createElementAccessExpression(expression, argumentExpression) { var result = ts.createSynthesizedNode(173 /* ElementAccessExpression */); result.expression = parenthesizeForAccess(expression); result.argumentExpression = argumentExpression; return result; } function parenthesizeForAccess(expr) { // When diagnosing whether the expression needs parentheses, the decision should be based // on the innermost expression in a chain of nested type assertions. while (expr.kind === 177 /* TypeAssertionExpression */ || expr.kind === 195 /* AsExpression */ || expr.kind === 196 /* NonNullExpression */) { expr = expr.expression; } // isLeftHandSideExpression is almost the correct criterion for when it is not necessary // to parenthesize the expression before a dot. The known exceptions are: // // NewExpression: // new C.x -> not the same as (new C).x // NumberLiteral // 1.x -> not the same as (1).x // if (ts.isLeftHandSideExpression(expr) && expr.kind !== 175 /* NewExpression */ && expr.kind !== 8 /* NumericLiteral */) { return expr; } var node = ts.createSynthesizedNode(178 /* ParenthesizedExpression */); node.expression = expr; return node; } function emitComputedPropertyName(node) { write("["); emitExpressionForPropertyName(node); write("]"); } function emitMethod(node) { if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) { write("*"); } emit(node.name); if (languageVersion < 2 /* ES6 */) { write(": function "); } emitSignatureAndBody(node); } function emitPropertyAssignment(node) { emit(node.name); write(": "); // This is to ensure that we emit comment in the following case: // For example: // obj = { // id: /*comment1*/ ()=>void // } // "comment1" is not considered to be leading comment for node.initializer // but rather a trailing comment on the previous node. emitTrailingCommentsOfPosition(node.initializer.pos); emit(node.initializer); } // Return true if identifier resolves to an exported member of a namespace function isExportReference(node) { var container = resolver.getReferencedExportContainer(node); return !!container; } // Return true if identifier resolves to an imported identifier function isImportedReference(node) { var declaration = resolver.getReferencedImportDeclaration(node); return declaration && (declaration.kind === 231 /* ImportClause */ || declaration.kind === 234 /* ImportSpecifier */); } function emitShorthandPropertyAssignment(node) { // The name property of a short-hand property assignment is considered an expression position, so here // we manually emit the identifier to avoid rewriting. writeTextOfNode(currentText, node.name); // If emitting pre-ES6 code, or if the name requires rewriting when resolved as an expression identifier, // we emit a normal property assignment. For example: // module m { // export let y; // } // module m { // let obj = { y }; // } // Here we need to emit obj = { y : m.y } regardless of the output target. // The same rules apply for imported identifiers when targeting module formats with indirect access to // the imported identifiers. For example, when targeting CommonJS: // // import {foo} from './foo'; // export const baz = { foo }; // // Must be transformed into: // // const foo_1 = require('./foo'); // exports.baz = { foo: foo_1.foo }; // if (languageVersion < 2 /* ES6 */ || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isExportReference(node.name)) { // Emit identifier as an identifier write(": "); emitExpressionIdentifier(node.name); } if (languageVersion >= 2 /* ES6 */ && node.objectAssignmentInitializer) { write(" = "); emit(node.objectAssignmentInitializer); } } function tryEmitConstantValue(node) { var constantValue = tryGetConstEnumValue(node); if (constantValue !== undefined) { write(constantValue.toString()); if (!compilerOptions.removeComments) { var propertyName = node.kind === 172 /* PropertyAccessExpression */ ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression); write(" /* " + propertyName + " */"); } return true; } return false; } function tryGetConstEnumValue(node) { if (compilerOptions.isolatedModules) { return undefined; } return node.kind === 172 /* PropertyAccessExpression */ || node.kind === 173 /* ElementAccessExpression */ ? resolver.getConstantValue(node) : undefined; } // Returns 'true' if the code was actually indented, false otherwise. // If the code is not indented, an optional valueToWriteWhenNotIndenting will be // emitted instead. function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) { var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2); // Always use a newline for synthesized code if the synthesizer desires it. var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2); if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) { increaseIndent(); writeLine(); return true; } else { if (valueToWriteWhenNotIndenting) { write(valueToWriteWhenNotIndenting); } return false; } } function emitPropertyAccess(node) { if (tryEmitConstantValue(node)) { return; } if (languageVersion === 2 /* ES6 */ && node.expression.kind === 95 /* SuperKeyword */ && isInAsyncMethodWithSuperInES6(node)) { var name_28 = ts.createSynthesizedNode(9 /* StringLiteral */); name_28.text = node.name.text; emitSuperAccessInAsyncMethod(node.expression, name_28); return; } emit(node.expression); var dotRangeStart = ts.nodeIsSynthesized(node.expression) ? -1 : node.expression.end; var dotRangeEnd = ts.nodeIsSynthesized(node.expression) ? -1 : ts.skipTrivia(currentText, node.expression.end) + 1; var dotToken = { pos: dotRangeStart, end: dotRangeEnd }; var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, dotToken); // 1 .toString is a valid property access, emit a space after the literal // Also emit a space if expression is a integer const enum value - it will appear in generated code as numeric literal var shouldEmitSpace = false; if (!indentedBeforeDot) { if (node.expression.kind === 8 /* NumericLiteral */) { // check if numeric literal was originally written with a dot var text = ts.getTextOfNodeFromSourceText(currentText, node.expression); shouldEmitSpace = text.indexOf(ts.tokenToString(21 /* DotToken */)) < 0; } else { // check if constant enum value is integer var constantValue = tryGetConstEnumValue(node.expression); // isFinite handles cases when constantValue is undefined shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue; } } if (shouldEmitSpace) { write(" ."); } else { write("."); } var indentedAfterDot = indentIfOnDifferentLines(node, dotToken, node.name); emit(node.name); decreaseIndentIf(indentedBeforeDot, indentedAfterDot); } function emitQualifiedName(node) { emit(node.left); write("."); emit(node.right); } function emitQualifiedNameAsExpression(node, useFallback) { if (node.left.kind === 69 /* Identifier */) { emitEntityNameAsExpression(node.left, useFallback); } else if (useFallback) { var temp = createAndRecordTempVariable(0 /* Auto */); write("("); emitNodeWithoutSourceMap(temp); write(" = "); emitEntityNameAsExpression(node.left, /*useFallback*/ true); write(") && "); emitNodeWithoutSourceMap(temp); } else { emitEntityNameAsExpression(node.left, /*useFallback*/ false); } write("."); emit(node.right); } function emitEntityNameAsExpression(node, useFallback) { switch (node.kind) { case 69 /* Identifier */: if (useFallback) { write("typeof "); emitExpressionIdentifier(node); write(" !== 'undefined' && "); } emitExpressionIdentifier(node); break; case 139 /* QualifiedName */: emitQualifiedNameAsExpression(node, useFallback); break; default: emitNodeWithoutSourceMap(node); break; } } function emitIndexedAccess(node) { if (tryEmitConstantValue(node)) { return; } if (languageVersion === 2 /* ES6 */ && node.expression.kind === 95 /* SuperKeyword */ && isInAsyncMethodWithSuperInES6(node)) { emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression); return; } emit(node.expression); write("["); emit(node.argumentExpression); write("]"); } function hasSpreadElement(elements) { return ts.forEach(elements, function (e) { return e.kind === 191 /* SpreadElementExpression */; }); } function skipParentheses(node) { while (node.kind === 178 /* ParenthesizedExpression */ || node.kind === 177 /* TypeAssertionExpression */ || node.kind === 195 /* AsExpression */ || node.kind === 196 /* NonNullExpression */) { node = node.expression; } return node; } function emitCallTarget(node) { if (node.kind === 69 /* Identifier */ || node.kind === 97 /* ThisKeyword */ || node.kind === 95 /* SuperKeyword */) { emit(node); return node; } var temp = createAndRecordTempVariable(0 /* Auto */); write("("); emit(temp); write(" = "); emit(node); write(")"); return temp; } function emitCallWithSpread(node) { var target; var expr = skipParentheses(node.expression); if (expr.kind === 172 /* PropertyAccessExpression */) { // Target will be emitted as "this" argument target = emitCallTarget(expr.expression); write("."); emit(expr.name); } else if (expr.kind === 173 /* ElementAccessExpression */) { // Target will be emitted as "this" argument target = emitCallTarget(expr.expression); write("["); emit(expr.argumentExpression); write("]"); } else if (expr.kind === 95 /* SuperKeyword */) { target = expr; write("_super"); } else { emit(node.expression); } write(".apply("); if (target) { if (target.kind === 95 /* SuperKeyword */) { // Calls of form super(...) and super.foo(...) emitThis(target); } else { // Calls of form obj.foo(...) emit(target); } } else { // Calls of form foo(...) write("void 0"); } write(", "); emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ true); write(")"); } function isInAsyncMethodWithSuperInES6(node) { if (languageVersion === 2 /* ES6 */) { var container = ts.getSuperContainer(node, /*includeFunctions*/ false); if (container && resolver.getNodeCheckFlags(container) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */)) { return true; } } return false; } function emitSuperAccessInAsyncMethod(superNode, argumentExpression) { var container = ts.getSuperContainer(superNode, /*includeFunctions*/ false); var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096 /* AsyncMethodWithSuperBinding */; write("_super("); emit(argumentExpression); write(isSuperBinding ? ").value" : ")"); } function emitCallExpression(node) { if (languageVersion < 2 /* ES6 */ && hasSpreadElement(node.arguments)) { emitCallWithSpread(node); return; } var expression = node.expression; var superCall = false; var isAsyncMethodWithSuper = false; if (expression.kind === 95 /* SuperKeyword */) { emitSuper(expression); superCall = true; } else { superCall = ts.isSuperPropertyOrElementAccess(expression); isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node); emit(expression); } if (superCall && (languageVersion < 2 /* ES6 */ || isAsyncMethodWithSuper)) { write(".call("); emitThis(expression); if (node.arguments.length) { write(", "); emitCommaList(node.arguments); } write(")"); } else { write("("); emitCommaList(node.arguments); write(")"); } } function emitNewExpression(node) { write("new "); // Spread operator logic is supported in new expressions in ES5 using a combination // of Function.prototype.bind() and Function.prototype.apply(). // // Example: // // var args = [1, 2, 3, 4, 5]; // new Array(...args); // // is compiled into the following ES5: // // var args = [1, 2, 3, 4, 5]; // new (Array.bind.apply(Array, [void 0].concat(args))); // // The 'thisArg' to 'bind' is ignored when invoking the result of 'bind' with 'new', // Thus, we set it to undefined ('void 0'). if (languageVersion === 1 /* ES5 */ && node.arguments && hasSpreadElement(node.arguments)) { write("("); var target = emitCallTarget(node.expression); write(".bind.apply("); emit(target); write(", [void 0].concat("); emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ false); write(")))"); write("()"); } else { emit(node.expression); if (node.arguments) { write("("); emitCommaList(node.arguments); write(")"); } } } function emitTaggedTemplateExpression(node) { if (languageVersion >= 2 /* ES6 */) { emit(node.tag); write(" "); emit(node.template); } else { emitDownlevelTaggedTemplate(node); } } function emitParenExpression(node) { // If the node is synthesized, it means the emitter put the parentheses there, // not the user. If we didn't want them, the emitter would not have put them // there. if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180 /* ArrowFunction */) { if (node.expression.kind === 177 /* TypeAssertionExpression */ || node.expression.kind === 195 /* AsExpression */ || node.expression.kind === 196 /* NonNullExpression */) { var operand = node.expression.expression; // Make sure we consider all nested cast expressions, e.g.: // (<any><number><any>-A).x; while (operand.kind === 177 /* TypeAssertionExpression */ || operand.kind === 195 /* AsExpression */ || operand.kind === 196 /* NonNullExpression */) { operand = operand.expression; } // We have an expression of the form: (<Type>SubExpr) or (SubExpr as Type) // Emitting this as (SubExpr) is really not desirable. We would like to emit the subexpr as is. // Omitting the parentheses, however, could cause change in the semantics of the generated // code if the casted expression has a lower precedence than the rest of the expression, e.g.: // (<any>new A).foo should be emitted as (new A).foo and not new A.foo // (<any>typeof A).toString() should be emitted as (typeof A).toString() and not typeof A.toString() // new (<any>A()) should be emitted as new (A()) and not new A() // (<any>function foo() { })() should be emitted as an IIF (function foo(){})() and not declaration function foo(){} () if (operand.kind !== 185 /* PrefixUnaryExpression */ && operand.kind !== 183 /* VoidExpression */ && operand.kind !== 182 /* TypeOfExpression */ && operand.kind !== 181 /* DeleteExpression */ && operand.kind !== 186 /* PostfixUnaryExpression */ && operand.kind !== 175 /* NewExpression */ && !(operand.kind === 187 /* BinaryExpression */ && node.expression.kind === 195 /* AsExpression */) && !(operand.kind === 174 /* CallExpression */ && node.parent.kind === 175 /* NewExpression */) && !(operand.kind === 179 /* FunctionExpression */ && node.parent.kind === 174 /* CallExpression */) && !(operand.kind === 8 /* NumericLiteral */ && node.parent.kind === 172 /* PropertyAccessExpression */)) { emit(operand); return; } } } write("("); emit(node.expression); write(")"); } function emitDeleteExpression(node) { write(ts.tokenToString(78 /* DeleteKeyword */)); write(" "); emit(node.expression); } function emitVoidExpression(node) { write(ts.tokenToString(103 /* VoidKeyword */)); write(" "); emit(node.expression); } function emitTypeOfExpression(node) { write(ts.tokenToString(101 /* TypeOfKeyword */)); write(" "); emit(node.expression); } function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) { if (!isCurrentFileSystemExternalModule() || node.kind !== 69 /* Identifier */ || ts.nodeIsSynthesized(node)) { return false; } var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 /* VariableDeclaration */ || node.parent.kind === 169 /* BindingElement */); var targetDeclaration = isVariableDeclarationOrBindingElement ? node.parent : resolver.getReferencedValueDeclaration(node); return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, /*isExported*/ true); } function isNameOfExportedDeclarationInNonES6Module(node) { if (modulekind === ts.ModuleKind.System || node.kind !== 69 /* Identifier */ || ts.nodeIsSynthesized(node)) { return false; } if (exportEquals || !exportSpecifiers || !(node.text in exportSpecifiers)) { return false; } // check that referenced declaration is declared on source file level var declaration = resolver.getReferencedValueDeclaration(node); return declaration && ts.getEnclosingBlockScopeContainer(declaration).kind === 256 /* SourceFile */; } function emitPrefixUnaryExpression(node) { var isPlusPlusOrMinusMinus = (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */); var externalExportChanged = isPlusPlusOrMinusMinus && isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand); if (externalExportChanged) { // emit // ++x // as // exports('x', ++x) write(exportFunctionForFile + "(\""); emitNodeWithoutSourceMap(node.operand); write("\", "); } var internalExportChanged = isPlusPlusOrMinusMinus && isNameOfExportedDeclarationInNonES6Module(node.operand); if (internalExportChanged) { emitAliasEqual(node.operand); } write(ts.tokenToString(node.operator)); // In some cases, we need to emit a space between the operator and the operand. One obvious case // is when the operator is an identifier, like delete or typeof. We also need to do this for plus // and minus expressions in certain cases. Specifically, consider the following two cases (parens // are just for clarity of exposition, and not part of the source code): // // (+(+1)) // (+(++1)) // // We need to emit a space in both cases. In the first case, the absence of a space will make // the resulting expression a prefix increment operation. And in the second, it will make the resulting // expression a prefix increment whose operand is a plus expression - (++(+x)) // The same is true of minus of course. if (node.operand.kind === 185 /* PrefixUnaryExpression */) { var operand = node.operand; if (node.operator === 35 /* PlusToken */ && (operand.operator === 35 /* PlusToken */ || operand.operator === 41 /* PlusPlusToken */)) { write(" "); } else if (node.operator === 36 /* MinusToken */ && (operand.operator === 36 /* MinusToken */ || operand.operator === 42 /* MinusMinusToken */)) { write(" "); } } emit(node.operand); if (externalExportChanged) { write(")"); } } function emitPostfixUnaryExpression(node) { var externalExportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand); var internalExportChanged = isNameOfExportedDeclarationInNonES6Module(node.operand); if (externalExportChanged) { // export function returns the value that was passes as the second argument // however for postfix unary expressions result value should be the value before modification. // emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)' write("(" + exportFunctionForFile + "(\""); emitNodeWithoutSourceMap(node.operand); write("\", "); write(ts.tokenToString(node.operator)); emit(node.operand); if (node.operator === 41 /* PlusPlusToken */) { write(") - 1)"); } else { write(") + 1)"); } } else if (internalExportChanged) { emitAliasEqual(node.operand); emit(node.operand); if (node.operator === 41 /* PlusPlusToken */) { write(" += 1"); } else { write(" -= 1"); } } else { emit(node.operand); write(ts.tokenToString(node.operator)); } } function shouldHoistDeclarationInSystemJsModule(node) { return isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ false); } /* * Checks if given node is a source file level declaration (not nested in module/function). * If 'isExported' is true - then declaration must also be exported. * This function is used in two cases: * - check if node is a exported source file level value to determine * if we should also export the value after its it changed * - check if node is a source level declaration to emit it differently, * i.e non-exported variable statement 'var x = 1' is hoisted so * when we emit variable statement 'var' should be dropped. */ function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) { if (!node || !isCurrentFileSystemExternalModule()) { return false; } var current = ts.getRootDeclaration(node).parent; while (current) { if (current.kind === 256 /* SourceFile */) { return !isExported || ((ts.getCombinedNodeFlags(node) & 1 /* Export */) !== 0); } else if (ts.isDeclaration(current)) { return false; } else { current = current.parent; } } } /** * Emit ES7 exponentiation operator downlevel using Math.pow * @param node a binary expression node containing exponentiationOperator (**, **=) */ function emitExponentiationOperator(node) { var leftHandSideExpression = node.left; if (node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) { var synthesizedLHS = void 0; var shouldEmitParentheses = false; if (ts.isElementAccessExpression(leftHandSideExpression)) { shouldEmitParentheses = true; write("("); synthesizedLHS = ts.createSynthesizedNode(173 /* ElementAccessExpression */, /*startsOnNewLine*/ false); var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false); synthesizedLHS.expression = identifier; if (leftHandSideExpression.argumentExpression.kind !== 8 /* NumericLiteral */ && leftHandSideExpression.argumentExpression.kind !== 9 /* StringLiteral */) { var tempArgumentExpression = createAndRecordTempVariable(268435456 /* _i */); synthesizedLHS.argumentExpression = tempArgumentExpression; emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, /*shouldEmitCommaBeforeAssignment*/ true, leftHandSideExpression.expression); } else { synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression; } write(", "); } else if (ts.isPropertyAccessExpression(leftHandSideExpression)) { shouldEmitParentheses = true; write("("); synthesizedLHS = ts.createSynthesizedNode(172 /* PropertyAccessExpression */, /*startsOnNewLine*/ false); var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false); synthesizedLHS.expression = identifier; synthesizedLHS.name = leftHandSideExpression.name; write(", "); } emit(synthesizedLHS || leftHandSideExpression); write(" = "); write("Math.pow("); emit(synthesizedLHS || leftHandSideExpression); write(", "); emit(node.right); write(")"); if (shouldEmitParentheses) { write(")"); } } else { write("Math.pow("); emit(leftHandSideExpression); write(", "); emit(node.right); write(")"); } } function emitAliasEqual(name) { for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) { var specifier = _b[_a]; emitStart(specifier.name); emitContainingModuleName(specifier); if (languageVersion === 0 /* ES3 */ && name.text === "default") { write('["default"]'); } else { write("."); emitNodeWithCommentsAndWithoutSourcemap(specifier.name); } emitEnd(specifier.name); write(" = "); } return true; } function emitBinaryExpression(node) { if (languageVersion < 2 /* ES6 */ && node.operatorToken.kind === 56 /* EqualsToken */ && (node.left.kind === 171 /* ObjectLiteralExpression */ || node.left.kind === 170 /* ArrayLiteralExpression */)) { emitDestructuring(node, node.parent.kind === 202 /* ExpressionStatement */); } else { var isAssignment = ts.isAssignmentOperator(node.operatorToken.kind); var externalExportChanged = isAssignment && isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left); if (externalExportChanged) { // emit assignment 'x <op> y' as 'exports("x", x <op> y)' write(exportFunctionForFile + "(\""); emitNodeWithoutSourceMap(node.left); write("\", "); } var internalExportChanged = isAssignment && isNameOfExportedDeclarationInNonES6Module(node.left); if (internalExportChanged) { // export { foo } // emit foo = 2 as exports.foo = foo = 2 emitAliasEqual(node.left); } if (node.operatorToken.kind === 38 /* AsteriskAsteriskToken */ || node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) { // Downleveled emit exponentiation operator using Math.pow emitExponentiationOperator(node); } else { emit(node.left); // Add indentation before emit the operator if the operator is on different line // For example: // 3 // + 2; // emitted as // 3 // + 2; var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 /* CommaToken */ ? " " : undefined); write(ts.tokenToString(node.operatorToken.kind)); var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " "); emit(node.right); decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator); } if (externalExportChanged) { write(")"); } } } function synthesizedNodeStartsOnNewLine(node) { return ts.nodeIsSynthesized(node) && node.startsOnNewLine; } function emitConditionalExpression(node) { emit(node.condition); var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " "); write("?"); var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " "); emit(node.whenTrue); decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion); var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " "); write(":"); var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " "); emit(node.whenFalse); decreaseIndentIf(indentedBeforeColon, indentedAfterColon); } // Helper function to decrease the indent if we previously indented. Allows multiple // previous indent values to be considered at a time. This also allows caller to just // call this once, passing in all their appropriate indent values, instead of needing // to call this helper function multiple times. function decreaseIndentIf(value1, value2) { if (value1) { decreaseIndent(); } if (value2) { decreaseIndent(); } } function isSingleLineEmptyBlock(node) { if (node && node.kind === 199 /* Block */) { var block = node; return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block); } } function emitBlock(node) { if (isSingleLineEmptyBlock(node)) { emitToken(15 /* OpenBraceToken */, node.pos); write(" "); emitToken(16 /* CloseBraceToken */, node.statements.end); return; } emitToken(15 /* OpenBraceToken */, node.pos); increaseIndent(); if (node.kind === 226 /* ModuleBlock */) { ts.Debug.assert(node.parent.kind === 225 /* ModuleDeclaration */); emitCaptureThisForNodeIfNecessary(node.parent); } emitLines(node.statements); if (node.kind === 226 /* ModuleBlock */) { emitTempDeclarations(/*newLine*/ true); } decreaseIndent(); writeLine(); emitToken(16 /* CloseBraceToken */, node.statements.end); } function emitEmbeddedStatement(node) { if (node.kind === 199 /* Block */) { write(" "); emit(node); } else { increaseIndent(); writeLine(); emit(node); decreaseIndent(); } } function emitExpressionStatement(node) { emitParenthesizedIf(node.expression, /*parenthesized*/ node.expression.kind === 180 /* ArrowFunction */); write(";"); } function emitIfStatement(node) { var endPos = emitToken(88 /* IfKeyword */, node.pos); write(" "); endPos = emitToken(17 /* OpenParenToken */, endPos); emit(node.expression); emitToken(18 /* CloseParenToken */, node.expression.end); emitEmbeddedStatement(node.thenStatement); if (node.elseStatement) { writeLine(); emitToken(80 /* ElseKeyword */, node.thenStatement.end); if (node.elseStatement.kind === 203 /* IfStatement */) { write(" "); emit(node.elseStatement); } else { emitEmbeddedStatement(node.elseStatement); } } } function emitDoStatement(node) { emitLoop(node, emitDoStatementWorker); } function emitDoStatementWorker(node, loop) { write("do"); if (loop) { emitConvertedLoopCall(loop, /*emitAsBlock*/ true); } else { emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true); } if (node.statement.kind === 199 /* Block */) { write(" "); } else { writeLine(); } write("while ("); emit(node.expression); write(");"); } function emitWhileStatement(node) { emitLoop(node, emitWhileStatementWorker); } function emitWhileStatementWorker(node, loop) { write("while ("); emit(node.expression); write(")"); if (loop) { emitConvertedLoopCall(loop, /*emitAsBlock*/ true); } else { emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true); } } /** * Returns true if start of variable declaration list was emitted. * Returns false if nothing was written - this can happen for source file level variable declarations * in system modules where such variable declarations are hoisted. */ function tryEmitStartOfVariableDeclarationList(decl) { if (shouldHoistVariable(decl, /*checkIfSourceFileLevelDecl*/ true)) { // variables in variable declaration list were already hoisted return false; } if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072 /* BlockScoped */) === 0) { // we are inside a converted loop - this can only happen in downlevel scenarios // record names for all variable declarations for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) { var varDecl = _b[_a]; hoistVariableDeclarationFromLoop(convertedLoopState, varDecl); } return false; } emitStart(decl); if (decl && languageVersion >= 2 /* ES6 */) { if (ts.isLet(decl)) { write("let "); } else if (ts.isConst(decl)) { write("const "); } else { write("var "); } } else { write("var "); } // Note here we specifically dont emit end so that if we are going to emit binding pattern // we can alter the source map correctly return true; } function emitVariableDeclarationListSkippingUninitializedEntries(list) { var started = false; for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) { var decl = _b[_a]; if (!decl.initializer) { continue; } if (!started) { started = true; } else { write(", "); } emit(decl); } return started; } function shouldConvertLoopBody(node) { return languageVersion < 2 /* ES6 */ && (resolver.getNodeCheckFlags(node) & 65536 /* LoopWithCapturedBlockScopedBinding */) !== 0; } function emitLoop(node, loopEmitter) { var shouldConvert = shouldConvertLoopBody(node); if (!shouldConvert) { loopEmitter(node, /* convertedLoop*/ undefined); } else { var loop = convertLoopBody(node); if (node.parent.kind === 214 /* LabeledStatement */) { // if parent of the loop was labeled statement - attach the label to loop skipping converted loop body emitLabelAndColon(node.parent); } loopEmitter(node, loop); } } function convertLoopBody(node) { var functionName = makeUniqueName("_loop"); var loopInitializer; switch (node.kind) { case 206 /* ForStatement */: case 207 /* ForInStatement */: case 208 /* ForOfStatement */: var initializer = node.initializer; if (initializer && initializer.kind === 219 /* VariableDeclarationList */) { loopInitializer = node.initializer; } break; } var loopParameters; var loopOutParameters; if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072 /* BlockScoped */)) { // if loop initializer contains block scoped variables - they should be passed to converted loop body as parameters loopParameters = []; for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) { var varDeclaration = _b[_a]; processVariableDeclaration(varDeclaration.name); } } var bodyIsBlock = node.statement.kind === 199 /* Block */; var paramList = loopParameters ? loopParameters.join(", ") : ""; writeLine(); write("var " + functionName + " = function(" + paramList + ")"); var convertedOuterLoopState = convertedLoopState; convertedLoopState = { loopOutParameters: loopOutParameters }; if (convertedOuterLoopState) { // convertedOuterLoopState !== undefined means that this converted loop is nested in another converted loop. // if outer converted loop has already accumulated some state - pass it through if (convertedOuterLoopState.argumentsName) { // outer loop has already used 'arguments' so we've already have some name to alias it // use the same name in all nested loops convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName; } if (convertedOuterLoopState.thisName) { // outer loop has already used 'this' so we've already have some name to alias it // use the same name in all nested loops convertedLoopState.thisName = convertedOuterLoopState.thisName; } if (convertedOuterLoopState.hoistedLocalVariables) { // we've already collected some non-block scoped variable declarations in enclosing loop // use the same storage in nested loop convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables; } } write(" {"); writeLine(); increaseIndent(); if (bodyIsBlock) { emitLines(node.statement.statements); } else { emit(node.statement); } writeLine(); // end of loop body -> copy out parameter copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ true); decreaseIndent(); writeLine(); write("};"); writeLine(); if (loopOutParameters) { // declare variables to hold out params for loop body write("var "); for (var i = 0; i < loopOutParameters.length; i++) { if (i !== 0) { write(", "); } write(loopOutParameters[i].outParamName); } write(";"); writeLine(); } if (convertedLoopState.argumentsName) { // if alias for arguments is set if (convertedOuterLoopState) { // pass it to outer converted loop convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName; } else { // this is top level converted loop and we need to create an alias for 'arguments' object write("var " + convertedLoopState.argumentsName + " = arguments;"); writeLine(); } } if (convertedLoopState.thisName) { // if alias for this is set if (convertedOuterLoopState) { // pass it to outer converted loop convertedOuterLoopState.thisName = convertedLoopState.thisName; } else { // this is top level converted loop so we need to create an alias for 'this' here // NOTE: // if converted loops were all nested in arrow function then we'll always emit '_this' so convertedLoopState.thisName will not be set. // If it is set this means that all nested loops are not nested in arrow function and it is safe to capture 'this'. write("var " + convertedLoopState.thisName + " = this;"); writeLine(); } } if (convertedLoopState.hoistedLocalVariables) { // if hoistedLocalVariables !== undefined this means that we've possibly collected some variable declarations to be hoisted later if (convertedOuterLoopState) { // pass them to outer converted loop convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables; } else { // deduplicate and hoist collected variable declarations write("var "); var seen = void 0; for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) { var id = _d[_c]; // Don't initialize seen unless we have at least one element. // Emit a comma to separate for all but the first element. if (!seen) { seen = ts.createMap(); } else { write(", "); } if (!(id.text in seen)) { emit(id); seen[id.text] = id.text; } } write(";"); writeLine(); } } var currentLoopState = convertedLoopState; convertedLoopState = convertedOuterLoopState; return { functionName: functionName, paramList: paramList, state: currentLoopState }; function processVariableDeclaration(name) { if (name.kind === 69 /* Identifier */) { var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name) ? getGeneratedNameForNode(name) : name.text; loopParameters.push(nameText); if (resolver.getNodeCheckFlags(name.parent) & 2097152 /* NeedsLoopOutParameter */) { var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) }; (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable); } } else { for (var _a = 0, _b = name.elements; _a < _b.length; _a++) { var element = _b[_a]; processVariableDeclaration(element.name); } } } } function emitNormalLoopBody(node, emitAsEmbeddedStatement) { var saveAllowedNonLabeledJumps; if (convertedLoopState) { // we get here if we are trying to emit normal loop loop inside converted loop // set allowedNonLabeledJumps to Break | Continue to mark that break\continue inside the loop should be emitted as is saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps; convertedLoopState.allowedNonLabeledJumps = 2 /* Break */ | 4 /* Continue */; } if (emitAsEmbeddedStatement) { emitEmbeddedStatement(node.statement); } else if (node.statement.kind === 199 /* Block */) { emitLines(node.statement.statements); } else { writeLine(); emit(node.statement); } if (convertedLoopState) { convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps; } } function copyLoopOutParameters(state, copyDirection, emitAsStatements) { if (state.loopOutParameters) { for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) { var outParam = _b[_a]; if (copyDirection === 0 /* ToOriginal */) { emitIdentifier(outParam.originalName); write(" = " + outParam.outParamName); } else { write(outParam.outParamName + " = "); emitIdentifier(outParam.originalName); } if (emitAsStatements) { write(";"); writeLine(); } else { write(", "); } } } } function emitConvertedLoopCall(loop, emitAsBlock) { if (emitAsBlock) { write(" {"); writeLine(); increaseIndent(); } // loop is considered simple if it does not have any return statements or break\continue that transfer control outside of the loop // simple loops are emitted as just 'loop()'; // NOTE: if loop uses only 'continue' it still will be emitted as simple loop var isSimpleLoop = !(loop.state.nonLocalJumps & ~4 /* Continue */) && !loop.state.labeledNonLocalBreaks && !loop.state.labeledNonLocalContinues; var loopResult = makeUniqueName("state"); if (!isSimpleLoop) { write("var " + loopResult + " = "); } write(loop.functionName + "(" + loop.paramList + ");"); writeLine(); copyLoopOutParameters(loop.state, 0 /* ToOriginal */, /*emitAsStatements*/ true); if (!isSimpleLoop) { // for non simple loops we need to store result returned from converted loop function and use it to do dispatching // converted loop function can return: // - object - used when body of the converted loop contains return statement. Property "value" of this object stores retuned value // - string - used to dispatch jumps. "break" and "continue" are used to non-labeled jumps, other values are used to transfer control to // different labels writeLine(); if (loop.state.nonLocalJumps & 8 /* Return */) { write("if (typeof " + loopResult + " === \"object\") "); if (convertedLoopState) { // we are currently nested in another converted loop - return unwrapped result write("return " + loopResult + ";"); // propagate 'hasReturn' flag to outer loop convertedLoopState.nonLocalJumps |= 8 /* Return */; } else { // top level converted loop - return unwrapped value write("return " + loopResult + ".value;"); } writeLine(); } if (loop.state.nonLocalJumps & 2 /* Break */) { write("if (" + loopResult + " === \"break\") break;"); writeLine(); } // in case of labeled breaks emit code that either breaks to some known label inside outer loop or delegates jump decision to outer loop emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState); } if (emitAsBlock) { writeLine(); decreaseIndent(); write("}"); } function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) { if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) { return; } write("switch(" + loopResultVariable + ") {"); increaseIndent(); emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, /*isBreak*/ true, loopResultVariable, outerLoop); emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, /*isBreak*/ false, loopResultVariable, outerLoop); decreaseIndent(); writeLine(); write("}"); } function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) { if (!table) { return; } for (var labelText in table) { var labelMarker = table[labelText]; writeLine(); write("case \"" + labelMarker + "\": "); // if there are no outer converted loop or outer label in question is located inside outer converted loop // then emit labeled break\continue // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) { if (isBreak) { write("break "); } else { write("continue "); } write(labelText + ";"); } else { setLabeledJump(outerLoop, isBreak, labelText, labelMarker); write("return " + loopResultVariable + ";"); } } } } function emitForStatement(node) { emitLoop(node, emitForStatementWorker); } function emitForStatementWorker(node, loop) { var endPos = emitToken(86 /* ForKeyword */, node.pos); write(" "); endPos = emitToken(17 /* OpenParenToken */, endPos); if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) { var variableDeclarationList = node.initializer; var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList); if (startIsEmitted) { emitCommaList(variableDeclarationList.declarations); } else { emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList); } } else if (node.initializer) { emit(node.initializer); } write(";"); emitOptional(" ", node.condition); write(";"); emitOptional(" ", node.incrementor); write(")"); if (loop) { emitConvertedLoopCall(loop, /*emitAsBlock*/ true); } else { emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true); } } function emitForInOrForOfStatement(node) { if (languageVersion < 2 /* ES6 */ && node.kind === 208 /* ForOfStatement */) { emitLoop(node, emitDownLevelForOfStatementWorker); } else { emitLoop(node, emitForInOrForOfStatementWorker); } } function emitForInOrForOfStatementWorker(node, loop) { var endPos = emitToken(86 /* ForKeyword */, node.pos); write(" "); endPos = emitToken(17 /* OpenParenToken */, endPos); if (node.initializer.kind === 219 /* VariableDeclarationList */) { var variableDeclarationList = node.initializer; if (variableDeclarationList.declarations.length >= 1) { tryEmitStartOfVariableDeclarationList(variableDeclarationList); emit(variableDeclarationList.declarations[0]); } } else { emit(node.initializer); } if (node.kind === 207 /* ForInStatement */) { write(" in "); } else { write(" of "); } emit(node.expression); emitToken(18 /* CloseParenToken */, node.expression.end); if (loop) { emitConvertedLoopCall(loop, /*emitAsBlock*/ true); } else { emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true); } } function emitDownLevelForOfStatementWorker(node, loop) { // The following ES6 code: // // for (let v of expr) { } // // should be emitted as // // for (let _i = 0, _a = expr; _i < _a.length; _i++) { // let v = _a[_i]; // } // // where _a and _i are temps emitted to capture the RHS and the counter, // respectively. // When the left hand side is an expression instead of a let declaration, // the "let v" is not emitted. // When the left hand side is a let/const, the v is renamed if there is // another v in scope. // Note that all assignments to the LHS are emitted in the body, including // all destructuring. // Note also that because an extra statement is needed to assign to the LHS, // for-of bodies are always emitted as blocks. var endPos = emitToken(86 /* ForKeyword */, node.pos); write(" "); endPos = emitToken(17 /* OpenParenToken */, endPos); // Do not emit the LHS let declaration yet, because it might contain destructuring. // Do not call recordTempDeclaration because we are declaring the temps // right here. Recording means they will be declared later. // In the case where the user wrote an identifier as the RHS, like this: // // for (let v of arr) { } // // we can't reuse 'arr' because it might be modified within the body of the loop. var counter = createTempVariable(268435456 /* _i */); var rhsReference = ts.createSynthesizedNode(69 /* Identifier */); rhsReference.text = node.expression.kind === 69 /* Identifier */ ? makeUniqueName(node.expression.text) : makeTempVariableName(0 /* Auto */); // This is the let keyword for the counter and rhsReference. The let keyword for // the LHS will be emitted inside the body. emitStart(node.expression); write("var "); // _i = 0 emitNodeWithoutSourceMap(counter); write(" = 0"); emitEnd(node.expression); // , _a = expr write(", "); emitStart(node.expression); emitNodeWithoutSourceMap(rhsReference); write(" = "); emitNodeWithoutSourceMap(node.expression); emitEnd(node.expression); write("; "); // _i < _a.length; emitStart(node.expression); emitNodeWithoutSourceMap(counter); write(" < "); emitNodeWithCommentsAndWithoutSourcemap(rhsReference); write(".length"); emitEnd(node.expression); write("; "); // _i++) emitStart(node.expression); emitNodeWithoutSourceMap(counter); write("++"); emitEnd(node.expression); emitToken(18 /* CloseParenToken */, node.expression.end); // Body write(" {"); writeLine(); increaseIndent(); // Initialize LHS // let v = _a[_i]; var rhsIterationValue = createElementAccessExpression(rhsReference, counter); emitStart(node.initializer); if (node.initializer.kind === 219 /* VariableDeclarationList */) { write("var "); var variableDeclarationList = node.initializer; if (variableDeclarationList.declarations.length > 0) { var declaration = variableDeclarationList.declarations[0]; if (ts.isBindingPattern(declaration.name)) { // This works whether the declaration is a var, let, or const. // It will use rhsIterationValue _a[_i] as the initializer. emitDestructuring(declaration, /*isAssignmentExpressionStatement*/ false, rhsIterationValue); } else { // The following call does not include the initializer, so we have // to emit it separately. emitNodeWithCommentsAndWithoutSourcemap(declaration); write(" = "); emitNodeWithoutSourceMap(rhsIterationValue); } } else { // It's an empty declaration list. This can only happen in an error case, if the user wrote // for (let of []) {} emitNodeWithoutSourceMap(createTempVariable(0 /* Auto */)); write(" = "); emitNodeWithoutSourceMap(rhsIterationValue); } } else { // Initializer is an expression. Emit the expression in the body, so that it's // evaluated on every iteration. var assignmentExpression = createBinaryExpression(node.initializer, 56 /* EqualsToken */, rhsIterationValue, /*startsOnNewLine*/ false); if (node.initializer.kind === 170 /* ArrayLiteralExpression */ || node.initializer.kind === 171 /* ObjectLiteralExpression */) { // This is a destructuring pattern, so call emitDestructuring instead of emit. Calling emit will not work, because it will cause // the BinaryExpression to be passed in instead of the expression statement, which will cause emitDestructuring to crash. emitDestructuring(assignmentExpression, /*isAssignmentExpressionStatement*/ true, /*value*/ undefined); } else { emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression); } } emitEnd(node.initializer); write(";"); if (loop) { writeLine(); emitConvertedLoopCall(loop, /*emitAsBlock*/ false); } else { emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ false); } writeLine(); decreaseIndent(); write("}"); } function emitBreakOrContinueStatement(node) { if (convertedLoopState) { // check if we can emit break\continue as is // it is possible if either // - break\continue is statement labeled and label is located inside the converted loop // - break\continue is non-labeled and located in non-converted loop\switch statement var jump = node.kind === 210 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */; var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) || (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump)); if (!canUseBreakOrContinue) { write("return "); // explicit exit from loop -> copy out parameters copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ false); if (!node.label) { if (node.kind === 210 /* BreakStatement */) { convertedLoopState.nonLocalJumps |= 2 /* Break */; write("\"break\";"); } else { convertedLoopState.nonLocalJumps |= 4 /* Continue */; // note: return value is emitted only to simplify debugging, call to converted loop body does not do any dispatching on it. write("\"continue\";"); } } else { var labelMarker = void 0; if (node.kind === 210 /* BreakStatement */) { labelMarker = "break-" + node.label.text; setLabeledJump(convertedLoopState, /*isBreak*/ true, node.label.text, labelMarker); } else { labelMarker = "continue-" + node.label.text; setLabeledJump(convertedLoopState, /*isBreak*/ false, node.label.text, labelMarker); } write("\"" + labelMarker + "\";"); } return; } } emitToken(node.kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */, node.pos); emitOptional(" ", node.label); write(";"); } function emitReturnStatement(node) { if (convertedLoopState) { convertedLoopState.nonLocalJumps |= 8 /* Return */; write("return { value: "); if (node.expression) { emit(node.expression); } else { write("void 0"); } write(" };"); return; } emitToken(94 /* ReturnKeyword */, node.pos); emitOptional(" ", node.expression); write(";"); } function emitWithStatement(node) { write("with ("); emit(node.expression); write(")"); emitEmbeddedStatement(node.statement); } function emitSwitchStatement(node) { var endPos = emitToken(96 /* SwitchKeyword */, node.pos); write(" "); emitToken(17 /* OpenParenToken */, endPos); emit(node.expression); endPos = emitToken(18 /* CloseParenToken */, node.expression.end); write(" "); var saveAllowedNonLabeledJumps; if (convertedLoopState) { saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps; // for switch statement allow only non-labeled break convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */; } emitCaseBlock(node.caseBlock, endPos); if (convertedLoopState) { convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps; } } function emitCaseBlock(node, startPos) { emitToken(15 /* OpenBraceToken */, startPos); increaseIndent(); emitLines(node.clauses); decreaseIndent(); writeLine(); emitToken(16 /* CloseBraceToken */, node.clauses.end); } function nodeStartPositionsAreOnSameLine(node1, node2) { return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) === ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos)); } function nodeEndPositionsAreOnSameLine(node1, node2) { return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) === ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end); } function nodeEndIsOnSameLineAsNodeStart(node1, node2) { return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) === ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos)); } function emitCaseOrDefaultClause(node) { if (node.kind === 249 /* CaseClause */) { write("case "); emit(node.expression); write(":"); } else { write("default:"); } if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) { write(" "); emit(node.statements[0]); } else { increaseIndent(); emitLines(node.statements); decreaseIndent(); } } function emitThrowStatement(node) { write("throw "); emit(node.expression); write(";"); } function emitTryStatement(node) { write("try "); emit(node.tryBlock); emit(node.catchClause); if (node.finallyBlock) { writeLine(); write("finally "); emit(node.finallyBlock); } } function emitCatchClause(node) { writeLine(); var endPos = emitToken(72 /* CatchKeyword */, node.pos); write(" "); emitToken(17 /* OpenParenToken */, endPos); emit(node.variableDeclaration); emitToken(18 /* CloseParenToken */, node.variableDeclaration ? node.variableDeclaration.end : endPos); write(" "); emitBlock(node.block); } function emitDebuggerStatement(node) { emitToken(76 /* DebuggerKeyword */, node.pos); write(";"); } function emitLabelAndColon(node) { emit(node.label); write(": "); } function emitLabeledStatement(node) { if (!ts.isIterationStatement(node.statement, /* lookInLabeledStatements */ false) || !shouldConvertLoopBody(node.statement)) { emitLabelAndColon(node); } if (convertedLoopState) { if (!convertedLoopState.labels) { convertedLoopState.labels = ts.createMap(); } convertedLoopState.labels[node.label.text] = node.label.text; } emit(node.statement); if (convertedLoopState) { convertedLoopState.labels[node.label.text] = undefined; } } function getContainingModule(node) { do { node = node.parent; } while (node && node.kind !== 225 /* ModuleDeclaration */); return node; } function emitContainingModuleName(node) { var container = getContainingModule(node); write(container ? getGeneratedNameForNode(container) : "exports"); } function emitModuleMemberName(node) { emitStart(node.name); if (ts.getCombinedNodeFlags(node) & 1 /* Export */) { var container = getContainingModule(node); if (container) { write(getGeneratedNameForNode(container)); write("."); } else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) { write("exports."); } } emitNodeWithCommentsAndWithoutSourcemap(node.name); emitEnd(node.name); } function createVoidZero() { var zero = ts.createSynthesizedNode(8 /* NumericLiteral */); zero.text = "0"; var result = ts.createSynthesizedNode(183 /* VoidExpression */); result.expression = zero; return result; } function emitEs6ExportDefaultCompat(node) { if (node.parent.kind === 256 /* SourceFile */) { ts.Debug.assert(!!(node.flags & 512 /* Default */) || node.kind === 235 /* ExportAssignment */); // only allow export default at a source file level if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) { if (!isEs6Module) { if (languageVersion !== 0 /* ES3 */) { // default value of configurable, enumerable, writable are `false`. write('Object.defineProperty(exports, "__esModule", { value: true });'); writeLine(); } else { write("exports.__esModule = true;"); writeLine(); } } } } } function emitExportMemberAssignment(node) { if (node.flags & 1 /* Export */) { writeLine(); emitStart(node); // emit call to exporter only for top level nodes if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) { // emit export default <smth> as // export("default", <smth>) write(exportFunctionForFile + "(\""); if (node.flags & 512 /* Default */) { write("default"); } else { emitNodeWithCommentsAndWithoutSourcemap(node.name); } write("\", "); emitDeclarationName(node); write(")"); } else { if (node.flags & 512 /* Default */) { emitEs6ExportDefaultCompat(node); if (languageVersion === 0 /* ES3 */) { write('exports["default"]'); } else { write("exports.default"); } } else { emitModuleMemberName(node); } write(" = "); emitDeclarationName(node); } emitEnd(node); write(";"); } } function emitExportMemberAssignments(name) { if (modulekind === ts.ModuleKind.System) { return; } if (!exportEquals && exportSpecifiers && name.text in exportSpecifiers) { for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) { var specifier = _b[_a]; writeLine(); emitStart(specifier.name); emitContainingModuleName(specifier); write("."); emitNodeWithCommentsAndWithoutSourcemap(specifier.name); emitEnd(specifier.name); write(" = "); emitExpressionIdentifier(name); write(";"); } } } function emitExportSpecifierInSystemModule(specifier) { ts.Debug.assert(modulekind === ts.ModuleKind.System); if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) { return; } writeLine(); emitStart(specifier.name); write(exportFunctionForFile + "(\""); emitNodeWithCommentsAndWithoutSourcemap(specifier.name); write("\", "); emitExpressionIdentifier(specifier.propertyName || specifier.name); write(")"); emitEnd(specifier.name); write(";"); } /** * Emit an assignment to a given identifier, 'name', with a given expression, 'value'. * @param name an identifier as a left-hand-side operand of the assignment * @param value an expression as a right-hand-side operand of the assignment * @param shouldEmitCommaBeforeAssignment a boolean indicating whether to prefix an assignment with comma */ function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) { if (shouldEmitCommaBeforeAssignment) { write(", "); } var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name); if (exportChanged) { write(exportFunctionForFile + "(\""); emitNodeWithCommentsAndWithoutSourcemap(name); write("\", "); } var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 /* VariableDeclaration */ || name.parent.kind === 169 /* BindingElement */); // If this is first var declaration, we need to start at var/let/const keyword instead // otherwise use nodeForSourceMap as the start position emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap); withTemporaryNoSourceMap(function () { if (isVariableDeclarationOrBindingElement) { emitModuleMemberName(name.parent); } else { emit(name); } write(" = "); emit(value); }); emitEnd(nodeForSourceMap, /*stopOverridingSpan*/ true); if (exportChanged) { write(")"); } } /** * Create temporary variable, emit an assignment of the variable the given expression * @param expression an expression to assign to the newly created temporary variable * @param canDefineTempVariablesInPlace a boolean indicating whether you can define the temporary variable at an assignment location * @param shouldEmitCommaBeforeAssignment a boolean indicating whether an assignment should prefix with comma */ function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) { var identifier = createTempVariable(0 /* Auto */); if (!canDefineTempVariablesInPlace) { recordTempDeclaration(identifier); } emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent); return identifier; } function isFirstVariableDeclaration(root) { return root.kind === 218 /* VariableDeclaration */ && root.parent.kind === 219 /* VariableDeclarationList */ && root.parent.declarations[0] === root; } function emitDestructuring(root, isAssignmentExpressionStatement, value) { var emitCount = 0; // An exported declaration is actually emitted as an assignment (to a property on the module object), so // temporary variables in an exported declaration need to have real declarations elsewhere // Also temporary variables should be explicitly allocated for source level declarations when module target is system // because actual variable declarations are hoisted var canDefineTempVariablesInPlace = false; if (root.kind === 218 /* VariableDeclaration */) { var isExported = ts.getCombinedNodeFlags(root) & 1 /* Export */; var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root); canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind; } else if (root.kind === 142 /* Parameter */) { canDefineTempVariablesInPlace = true; } if (root.kind === 187 /* BinaryExpression */) { emitAssignmentExpression(root); } else { ts.Debug.assert(!isAssignmentExpressionStatement); // If first variable declaration of variable statement correct the start location if (isFirstVariableDeclaration(root)) { // Use emit location of "var " as next emit start entry sourceMap.changeEmitSourcePos(); } emitBindingElement(root, value); } /** * Ensures that there exists a declared identifier whose value holds the given expression. * This function is useful to ensure that the expression's value can be read from in subsequent expressions. * Unless 'reuseIdentifierExpressions' is false, 'expr' will be returned if it is just an identifier. * * @param expr the expression whose value needs to be bound. * @param reuseIdentifierExpressions true if identifier expressions can simply be returned; * false if it is necessary to always emit an identifier. */ function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) { if (expr.kind === 69 /* Identifier */ && reuseIdentifierExpressions) { return expr; } var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode); emitCount++; return identifier; } function createDefaultValueCheck(value, defaultValue, sourceMapNode) { // The value expression will be evaluated twice, so for anything but a simple identifier // we need to generate a temporary variable // If the temporary variable needs to be emitted use the source Map node for assignment of that statement value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode); // Return the expression 'value === void 0 ? defaultValue : value' var equals = ts.createSynthesizedNode(187 /* BinaryExpression */); equals.left = value; equals.operatorToken = ts.createSynthesizedNode(32 /* EqualsEqualsEqualsToken */); equals.right = createVoidZero(); return createConditionalExpression(equals, defaultValue, value); } function createConditionalExpression(condition, whenTrue, whenFalse) { var cond = ts.createSynthesizedNode(188 /* ConditionalExpression */); cond.condition = condition; cond.questionToken = ts.createSynthesizedNode(53 /* QuestionToken */); cond.whenTrue = whenTrue; cond.colonToken = ts.createSynthesizedNode(54 /* ColonToken */); cond.whenFalse = whenFalse; return cond; } function createNumericLiteral(value) { var node = ts.createSynthesizedNode(8 /* NumericLiteral */); node.text = "" + value; return node; } function createPropertyAccessForDestructuringProperty(object, propName) { var index; var nameIsComputed = propName.kind === 140 /* ComputedPropertyName */; if (nameIsComputed) { // TODO to handle when we look into sourcemaps for computed properties, for now use propName index = ensureIdentifier(propName.expression, /*reuseIdentifierExpressions*/ false, propName); } else { // We create a synthetic copy of the identifier in order to avoid the rewriting that might // otherwise occur when the identifier is emitted. index = ts.createSynthesizedNode(propName.kind); // We need to unescape identifier here because when parsing an identifier prefixing with "__" // the parser need to append "_" in order to escape colliding with magic identifiers such as "__proto__" // Therefore, in order to correctly emit identifiers that are written in original TypeScript file, // we will unescapeIdentifier to remove additional underscore (if no underscore is added, the function will return original input string) index.text = ts.unescapeIdentifier(propName.text); } return !nameIsComputed && index.kind === 69 /* Identifier */ ? createPropertyAccessExpression(object, index) : createElementAccessExpression(object, index); } function createSliceCall(value, sliceIndex) { var call = ts.createSynthesizedNode(174 /* CallExpression */); var sliceIdentifier = ts.createSynthesizedNode(69 /* Identifier */); sliceIdentifier.text = "slice"; call.expression = createPropertyAccessExpression(value, sliceIdentifier); call.arguments = ts.createSynthesizedNodeArray(); call.arguments[0] = createNumericLiteral(sliceIndex); return call; } function emitObjectLiteralAssignment(target, value, sourceMapNode) { var properties = target.properties; if (properties.length !== 1) { // For anything but a single element destructuring we need to generate a temporary // to ensure value is evaluated exactly once. // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode); } for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) { var p = properties_5[_a]; if (p.kind === 253 /* PropertyAssignment */ || p.kind === 254 /* ShorthandPropertyAssignment */) { var propName = p.name; var target_1 = p.kind === 254 /* ShorthandPropertyAssignment */ ? p : p.initializer || propName; // Assignment for target = value.propName should highlight whole property, hence use p as source map node emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p); } } } function emitArrayLiteralAssignment(target, value, sourceMapNode) { var elements = target.elements; if (elements.length !== 1) { // For anything but a single element destructuring we need to generate a temporary // to ensure value is evaluated exactly once. // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode); } for (var i = 0; i < elements.length; i++) { var e = elements[i]; if (e.kind !== 193 /* OmittedExpression */) { // Assignment for target = value.propName should highlight whole property, hence use e as source map node if (e.kind !== 191 /* SpreadElementExpression */) { emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e); } else if (i === elements.length - 1) { emitDestructuringAssignment(e.expression, createSliceCall(value, i), e); } } } } function emitDestructuringAssignment(target, value, sourceMapNode) { // When emitting target = value use source map node to highlight, including any temporary assignments needed for this if (target.kind === 254 /* ShorthandPropertyAssignment */) { if (target.objectAssignmentInitializer) { value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode); } target = target.name; } else if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) { value = createDefaultValueCheck(value, target.right, sourceMapNode); target = target.left; } if (target.kind === 171 /* ObjectLiteralExpression */) { emitObjectLiteralAssignment(target, value, sourceMapNode); } else if (target.kind === 170 /* ArrayLiteralExpression */) { emitArrayLiteralAssignment(target, value, sourceMapNode); } else { emitAssignment(target, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, sourceMapNode); emitCount++; } } function emitAssignmentExpression(root) { var target = root.left; var value = root.right; if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) { emit(value); } else if (isAssignmentExpressionStatement) { // Source map node for root.left = root.right is root // but if root is synthetic, which could be in below case, use the target which is { a } // for ({a} of {a: string}) { // } emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root); } else { if (root.parent.kind !== 178 /* ParenthesizedExpression */) { write("("); } // Temporary assignment needed to emit root should highlight whole binary expression value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, root); // Source map node for root.left = root.right is root emitDestructuringAssignment(target, value, root); write(", "); emit(value); if (root.parent.kind !== 178 /* ParenthesizedExpression */) { write(")"); } } } function emitBindingElement(target, value) { // Any temporary assignments needed to emit target = value should point to target if (target.initializer) { // Combine value and initializer value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer; } else if (!value) { // Use 'void 0' in absence of value and initializer value = createVoidZero(); } if (ts.isBindingPattern(target.name)) { var pattern = target.name; var elements = pattern.elements; var numElements = elements.length; if (numElements !== 1) { // For anything other than a single-element destructuring we need to generate a temporary // to ensure value is evaluated exactly once. Additionally, if we have zero elements // we need to emit *something* to ensure that in case a 'var' keyword was already emitted, // so in that case, we'll intentionally create that temporary. value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ numElements !== 0, target); } for (var i = 0; i < numElements; i++) { var element = elements[i]; if (pattern.kind === 167 /* ObjectBindingPattern */) { // Rewrite element to a declaration with an initializer that fetches property var propName = element.propertyName || element.name; emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName)); } else if (element.kind !== 193 /* OmittedExpression */) { if (!element.dotDotDotToken) { // Rewrite element to a declaration that accesses array element at index i emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i))); } else if (i === numElements - 1) { emitBindingElement(element, createSliceCall(value, i)); } } } } else { emitAssignment(target.name, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, target); emitCount++; } } } function emitVariableDeclaration(node) { if (ts.isBindingPattern(node.name)) { var isExported = ts.getCombinedNodeFlags(node) & 1 /* Export */; if (languageVersion >= 2 /* ES6 */ && (!isExported || modulekind === ts.ModuleKind.ES6)) { // emit ES6 destructuring only if target module is ES6 or variable is not exported // exported variables in CJS/AMD are prefixed with 'exports.' so result javascript { exports.toString } = 1; is illegal var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System && shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true); if (isTopLevelDeclarationInSystemModule) { // In System modules top level variables are hoisted // so variable declarations with destructuring are turned into destructuring assignments. // As a result, they will need parentheses to disambiguate object binding assignments from blocks. write("("); } emit(node.name); emitOptional(" = ", node.initializer); if (isTopLevelDeclarationInSystemModule) { write(")"); } } else { emitDestructuring(node, /*isAssignmentExpressionStatement*/ false); } } else { var initializer = node.initializer; if (!initializer && languageVersion < 2 /* ES6 */ && // for names - binding patterns that lack initializer there is no point to emit explicit initializer // since downlevel codegen for destructuring will fail in the absence of initializer so all binding elements will say uninitialized node.name.kind === 69 /* Identifier */) { var container = ts.getEnclosingBlockScopeContainer(node); var flags = resolver.getNodeCheckFlags(node); // nested let bindings might need to be initialized explicitly to preserve ES6 semantic // { let x = 1; } // { let x; } // x here should be undefined. not 1 // NOTES: // Top level bindings never collide with anything and thus don't require explicit initialization. // As for nested let bindings there are two cases: // - nested let bindings that were not renamed definitely should be initialized explicitly // { let x = 1; } // { let x; if (some-condition) { x = 1}; if (x) { /*1*/ } } // Without explicit initialization code in /*1*/ can be executed even if some-condition is evaluated to false // - renaming introduces fresh name that should not collide with any existing names, however renamed bindings sometimes also should be // explicitly initialized. One particular case: non-captured binding declared inside loop body (but not in loop initializer) // let x; // for (;;) { // let x; // } // in downlevel codegen inner 'x' will be renamed so it won't collide with outer 'x' however it will should be reset on every iteration // as if it was declared anew. // * Why non-captured binding - because if loop contains block scoped binding captured in some function then loop body will be rewritten // to have a fresh scope on every iteration so everything will just work. // * Why loop initializer is excluded - since we've introduced a fresh name it already will be undefined. var isCapturedInFunction = flags & 131072 /* CapturedBlockScopedBinding */; var isDeclaredInLoop = flags & 262144 /* BlockScopedBindingInLoop */; var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) || (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false)); var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 /* Let */ && !emittedAsTopLevel; var emitExplicitInitializer = emittedAsNestedLetDeclaration && container.kind !== 207 /* ForInStatement */ && container.kind !== 208 /* ForOfStatement */ && (!resolver.isDeclarationWithCollidingName(node) || (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, /*lookInLabeledStatements*/ false))); if (emitExplicitInitializer) { initializer = createVoidZero(); } } var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name); if (exportChanged) { write(exportFunctionForFile + "(\""); emitNodeWithCommentsAndWithoutSourcemap(node.name); write("\", "); } emitModuleMemberName(node); emitOptional(" = ", initializer); if (exportChanged) { write(")"); } } } function emitExportVariableAssignments(node) { if (node.kind === 193 /* OmittedExpression */) { return; } var name = node.name; if (name.kind === 69 /* Identifier */) { emitExportMemberAssignments(name); } else if (ts.isBindingPattern(name)) { ts.forEach(name.elements, emitExportVariableAssignments); } } function isES6ExportedDeclaration(node) { return !!(node.flags & 1 /* Export */) && modulekind === ts.ModuleKind.ES6 && node.parent.kind === 256 /* SourceFile */; } function emitVariableStatement(node) { var startIsEmitted = false; if (node.flags & 1 /* Export */) { if (isES6ExportedDeclaration(node)) { // Exported ES6 module member write("export "); startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList); } } else { startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList); } if (startIsEmitted) { emitCommaList(node.declarationList.declarations); write(";"); } else { var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList); if (atLeastOneItem) { write(";"); } } if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) { ts.forEach(node.declarationList.declarations, emitExportVariableAssignments); } } function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) { // If we're not exporting the variables, there's nothing special here. // Always emit comments for these nodes. if (!(node.flags & 1 /* Export */)) { return true; } // If we are exporting, but it's a top-level ES6 module exports, // we'll emit the declaration list verbatim, so emit comments too. if (isES6ExportedDeclaration(node)) { return true; } // Otherwise, only emit if we have at least one initializer present. for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) { var declaration = _b[_a]; if (declaration.initializer) { return true; } } return false; } function emitParameter(node) { if (languageVersion < 2 /* ES6 */) { if (ts.isBindingPattern(node.name)) { var name_29 = createTempVariable(0 /* Auto */); if (!tempParameters) { tempParameters = []; } tempParameters.push(name_29); emit(name_29); } else { emit(node.name); } } else { if (node.dotDotDotToken) { write("..."); } emit(node.name); emitOptional(" = ", node.initializer); } } function emitDefaultValueAssignments(node) { if (languageVersion < 2 /* ES6 */) { var tempIndex_1 = 0; ts.forEach(node.parameters, function (parameter) { // A rest parameter cannot have a binding pattern or an initializer, // so let's just ignore it. if (parameter.dotDotDotToken) { return; } var paramName = parameter.name, initializer = parameter.initializer; if (ts.isBindingPattern(paramName)) { // In cases where a binding pattern is simply '[]' or '{}', // we usually don't want to emit a var declaration; however, in the presence // of an initializer, we must emit that expression to preserve side effects. var hasBindingElements = paramName.elements.length > 0; if (hasBindingElements || initializer) { writeLine(); write("var "); if (hasBindingElements) { emitDestructuring(parameter, /*isAssignmentExpressionStatement*/ false, tempParameters[tempIndex_1]); } else { emit(tempParameters[tempIndex_1]); write(" = "); emit(initializer); } write(";"); } // Regardless of whether we will emit a var declaration for the binding pattern, we generate the temporary // variable for the parameter (see: emitParameter) tempIndex_1++; } else if (initializer) { writeLine(); emitStart(parameter); write("if ("); emitNodeWithoutSourceMap(paramName); write(" === void 0)"); emitEnd(parameter); write(" { "); emitStart(parameter); emitNodeWithCommentsAndWithoutSourcemap(paramName); write(" = "); emitNodeWithCommentsAndWithoutSourcemap(initializer); emitEnd(parameter); write("; }"); } }); } } function emitRestParameter(node) { if (languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node)) { var restParam = node.parameters[node.parameters.length - 1]; // A rest parameter cannot have a binding pattern, so let's just ignore it if it does. if (ts.isBindingPattern(restParam.name)) { return; } var skipThisCount = node.parameters.length && node.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */ ? 1 : 0; var restIndex = node.parameters.length - 1 - skipThisCount; var tempName = createTempVariable(268435456 /* _i */).text; writeLine(); emitLeadingComments(restParam); emitStart(restParam); write("var "); emitNodeWithCommentsAndWithoutSourcemap(restParam.name); write(" = [];"); emitEnd(restParam); emitTrailingComments(restParam); writeLine(); write("for ("); emitStart(restParam); write("var " + tempName + " = " + restIndex + ";"); emitEnd(restParam); write(" "); emitStart(restParam); write(tempName + " < arguments.length;"); emitEnd(restParam); write(" "); emitStart(restParam); write(tempName + "++"); emitEnd(restParam); write(") {"); increaseIndent(); writeLine(); emitStart(restParam); emitNodeWithCommentsAndWithoutSourcemap(restParam.name); write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];"); emitEnd(restParam); decreaseIndent(); writeLine(); write("}"); } } function emitAccessor(node) { write(node.kind === 149 /* GetAccessor */ ? "get " : "set "); emit(node.name); emitSignatureAndBody(node); } function shouldEmitAsArrowFunction(node) { return node.kind === 180 /* ArrowFunction */ && languageVersion >= 2 /* ES6 */; } function emitDeclarationName(node) { if (node.name) { emitNodeWithCommentsAndWithoutSourcemap(node.name); } else { write(getGeneratedNameForNode(node)); } } function shouldEmitFunctionName(node) { if (node.kind === 179 /* FunctionExpression */) { // Emit name if one is present return !!node.name; } if (node.kind === 220 /* FunctionDeclaration */) { // Emit name if one is present, or emit generated name in down-level case (for export default case) return !!node.name || modulekind !== ts.ModuleKind.ES6; } } function emitFunctionDeclaration(node) { if (ts.nodeIsMissing(node.body)) { return emitCommentsOnNotEmittedNode(node); } // TODO (yuisu) : we should not have special cases to condition emitting comments // but have one place to fix check for these conditions. var kind = node.kind, parent = node.parent; if (kind !== 147 /* MethodDeclaration */ && kind !== 146 /* MethodSignature */ && parent && parent.kind !== 253 /* PropertyAssignment */ && parent.kind !== 174 /* CallExpression */ && parent.kind !== 170 /* ArrayLiteralExpression */) { // 1. Methods will emit comments at their assignment declaration sites. // // 2. If the function is a property of object literal, emitting leading-comments // is done by emitNodeWithoutSourceMap which then call this function. // In particular, we would like to avoid emit comments twice in following case: // // var obj = { // id: // /*comment*/ () => void // } // // 3. If the function is an argument in call expression, emitting of comments will be // taken care of in emit list of arguments inside of 'emitCallExpression'. // // 4. If the function is in an array literal, 'emitLinePreservingList' will take care // of leading comments. emitLeadingComments(node); } emitStart(node); // For targeting below es6, emit functions-like declaration including arrow function using function keyword. // When targeting ES6, emit arrow function natively in ES6 by omitting function keyword and using fat arrow instead if (!shouldEmitAsArrowFunction(node)) { if (isES6ExportedDeclaration(node)) { write("export "); if (node.flags & 512 /* Default */) { write("default "); } } write("function"); if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) { write("*"); } write(" "); } if (shouldEmitFunctionName(node)) { emitDeclarationName(node); } emitSignatureAndBody(node); if (modulekind !== ts.ModuleKind.ES6 && kind === 220 /* FunctionDeclaration */ && parent === currentSourceFile && node.name) { emitExportMemberAssignments(node.name); } emitEnd(node); if (kind !== 147 /* MethodDeclaration */ && kind !== 146 /* MethodSignature */ && kind !== 180 /* ArrowFunction */) { emitTrailingComments(node); } } function emitCaptureThisForNodeIfNecessary(node) { if (resolver.getNodeCheckFlags(node) & 4 /* CaptureThis */) { writeLine(); emitStart(node); write("var _this = this;"); emitEnd(node); } } function emitSignatureParameters(node) { increaseIndent(); write("("); if (node) { var parameters = node.parameters; var skipCount = node.parameters.length && node.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */ ? 1 : 0; var omitCount = languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node) ? 1 : 0; emitList(parameters, skipCount, parameters.length - omitCount - skipCount, /*multiLine*/ false, /*trailingComma*/ false); } write(")"); decreaseIndent(); } function emitSignatureParametersForArrow(node) { // Check whether the parameter list needs parentheses and preserve no-parenthesis if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) { emit(node.parameters[0]); return; } emitSignatureParameters(node); } function emitAsyncFunctionBodyForES6(node) { var promiseConstructor = ts.getEntityNameFromTypeNode(node.type); var isArrowFunction = node.kind === 180 /* ArrowFunction */; var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0; // An async function is emit as an outer function that calls an inner // generator function. To preserve lexical bindings, we pass the current // `this` and `arguments` objects to `__awaiter`. The generator function // passed to `__awaiter` is executed inside of the callback to the // promise constructor. // // The emit for an async arrow without a lexical `arguments` binding might be: // // // input // let a = async (b) => { await b; } // // // output // let a = (b) => __awaiter(this, void 0, void 0, function* () { // yield b; // }); // // The emit for an async arrow with a lexical `arguments` binding might be: // // // input // let a = async (b) => { await arguments[0]; } // // // output // let a = (b) => __awaiter(this, arguments, void 0, function* (arguments) { // yield arguments[0]; // }); // // The emit for an async function expression without a lexical `arguments` binding // might be: // // // input // let a = async function (b) { // await b; // } // // // output // let a = function (b) { // return __awaiter(this, void 0, void 0, function* () { // yield b; // }); // } // // The emit for an async function expression with a lexical `arguments` binding // might be: // // // input // let a = async function (b) { // await arguments[0]; // } // // // output // let a = function (b) { // return __awaiter(this, arguments, void 0, function* (_arguments) { // yield _arguments[0]; // }); // } // // The emit for an async function expression with a lexical `arguments` binding // and a return type annotation might be: // // // input // let a = async function (b): MyPromise<any> { // await arguments[0]; // } // // // output // let a = function (b) { // return __awaiter(this, arguments, MyPromise, function* (_arguments) { // yield _arguments[0]; // }); // } // // If this is not an async arrow, emit the opening brace of the function body // and the start of the return statement. if (!isArrowFunction) { write(" {"); increaseIndent(); writeLine(); if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) { writeLines("\nconst _super = (function (geti, seti) {\n const cache = Object.create(null);\n return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);"); writeLine(); } else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) { write("const _super = name => super[name];"); writeLine(); } write("return"); } write(" __awaiter(this"); if (hasLexicalArguments) { write(", arguments, "); } else { write(", void 0, "); } if (languageVersion >= 2 /* ES6 */ || !promiseConstructor) { write("void 0"); } else { emitEntityNameAsExpression(promiseConstructor, /*useFallback*/ false); } // Emit the call to __awaiter. write(", function* ()"); // Emit the signature and body for the inner generator function. emitFunctionBody(node); write(")"); // If this is not an async arrow, emit the closing brace of the outer function body. if (!isArrowFunction) { write(";"); decreaseIndent(); writeLine(); write("}"); } } function emitFunctionBody(node) { if (!node.body) { // There can be no body when there are parse errors. Just emit an empty block // in that case. write(" { }"); } else { if (node.body.kind === 199 /* Block */) { emitBlockFunctionBody(node, node.body); } else { emitExpressionFunctionBody(node, node.body); } } } function emitSignatureAndBody(node) { var saveConvertedLoopState = convertedLoopState; var saveTempFlags = tempFlags; var saveTempVariables = tempVariables; var saveTempParameters = tempParameters; convertedLoopState = undefined; tempFlags = 0; tempVariables = undefined; tempParameters = undefined; // When targeting ES6, emit arrow function natively in ES6 if (shouldEmitAsArrowFunction(node)) { emitSignatureParametersForArrow(node); write(" =>"); } else { emitSignatureParameters(node); } var isAsync = ts.isAsyncFunctionLike(node); if (isAsync) { emitAsyncFunctionBodyForES6(node); } else { emitFunctionBody(node); } if (!isES6ExportedDeclaration(node)) { emitExportMemberAssignment(node); } ts.Debug.assert(convertedLoopState === undefined); convertedLoopState = saveConvertedLoopState; tempFlags = saveTempFlags; tempVariables = saveTempVariables; tempParameters = saveTempParameters; } // Returns true if any preamble code was emitted. function emitFunctionBodyPreamble(node) { emitCaptureThisForNodeIfNecessary(node); emitDefaultValueAssignments(node); emitRestParameter(node); } function emitExpressionFunctionBody(node, body) { if (languageVersion < 2 /* ES6 */ || node.flags & 256 /* Async */) { emitDownLevelExpressionFunctionBody(node, body); return; } // For es6 and higher we can emit the expression as is. However, in the case // where the expression might end up looking like a block when emitted, we'll // also wrap it in parentheses first. For example if you have: a => <foo>{} // then we need to generate: a => ({}) write(" "); // Unwrap all type assertions. var current = body; while (current.kind === 177 /* TypeAssertionExpression */) { current = current.expression; } emitParenthesizedIf(body, current.kind === 171 /* ObjectLiteralExpression */); } function emitDownLevelExpressionFunctionBody(node, body) { write(" {"); increaseIndent(); var outPos = writer.getTextPos(); emitDetachedCommentsAndUpdateCommentsInfo(node.body); emitFunctionBodyPreamble(node); var preambleEmitted = writer.getTextPos() !== outPos; decreaseIndent(); // If we didn't have to emit any preamble code, then attempt to keep the arrow // function on one line. if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) { write(" "); emitStart(body); write("return "); emit(body); emitEnd(body); write(";"); emitTempDeclarations(/*newLine*/ false); write(" "); } else { increaseIndent(); writeLine(); emitLeadingComments(node.body); emitStart(body); write("return "); emit(body); emitEnd(body); write(";"); emitTrailingComments(node.body); emitTempDeclarations(/*newLine*/ true); decreaseIndent(); writeLine(); } emitStart(node.body); write("}"); emitEnd(node.body); } function emitBlockFunctionBody(node, body) { write(" {"); var initialTextPos = writer.getTextPos(); increaseIndent(); emitDetachedCommentsAndUpdateCommentsInfo(body.statements); // Emit all the directive prologues (like "use strict"). These have to come before // any other preamble code we write (like parameter initializers). var startIndex = emitDirectivePrologues(body.statements, /*startWithNewLine*/ true); emitFunctionBodyPreamble(node); decreaseIndent(); var preambleEmitted = writer.getTextPos() !== initialTextPos; if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) { for (var _a = 0, _b = body.statements; _a < _b.length; _a++) { var statement = _b[_a]; write(" "); emit(statement); } emitTempDeclarations(/*newLine*/ false); write(" "); emitLeadingCommentsOfPosition(body.statements.end); } else { increaseIndent(); emitLinesStartingAt(body.statements, startIndex); emitTempDeclarations(/*newLine*/ true); writeLine(); emitLeadingCommentsOfPosition(body.statements.end); decreaseIndent(); } emitToken(16 /* CloseBraceToken */, body.statements.end); } /** * Return the statement at a given index if it is a super-call statement * @param ctor a constructor declaration * @param index an index to constructor's body to check */ function getSuperCallAtGivenIndex(ctor, index) { if (!ctor.body) { return undefined; } var statements = ctor.body.statements; if (!statements || index >= statements.length) { return undefined; } var statement = statements[index]; if (statement.kind === 202 /* ExpressionStatement */) { return ts.isSuperCallExpression(statement.expression) ? statement : undefined; } } function emitParameterPropertyAssignments(node) { ts.forEach(node.parameters, function (param) { if (param.flags & 92 /* ParameterPropertyModifier */) { writeLine(); emitStart(param); emitStart(param.name); write("this."); emitNodeWithoutSourceMap(param.name); emitEnd(param.name); write(" = "); emit(param.name); write(";"); emitEnd(param); } }); } function emitMemberAccessForPropertyName(memberName) { // This does not emit source map because it is emitted by caller as caller // is aware how the property name changes to the property access // eg. public x = 10; becomes this.x and static x = 10 becomes className.x if (memberName.kind === 9 /* StringLiteral */ || memberName.kind === 8 /* NumericLiteral */) { write("["); emitNodeWithCommentsAndWithoutSourcemap(memberName); write("]"); } else if (memberName.kind === 140 /* ComputedPropertyName */) { emitComputedPropertyName(memberName); } else { write("."); emitNodeWithCommentsAndWithoutSourcemap(memberName); } } function getInitializedProperties(node, isStatic) { var properties = []; for (var _a = 0, _b = node.members; _a < _b.length; _a++) { var member = _b[_a]; if (member.kind === 145 /* PropertyDeclaration */ && isStatic === ((member.flags & 32 /* Static */) !== 0) && member.initializer) { properties.push(member); } } return properties; } function emitPropertyDeclarations(node, properties) { for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) { var property = properties_6[_a]; emitPropertyDeclaration(node, property); } } function emitPropertyDeclaration(node, property, receiver, isExpression) { writeLine(); emitLeadingComments(property); emitStart(property); emitStart(property.name); if (receiver) { write(receiver); } else { if (property.flags & 32 /* Static */) { emitDeclarationName(node); } else { write("this"); } } emitMemberAccessForPropertyName(property.name); emitEnd(property.name); write(" = "); emit(property.initializer); if (!isExpression) { write(";"); } emitEnd(property); emitTrailingComments(property); } function emitMemberFunctionsForES5AndLower(node) { ts.forEach(node.members, function (member) { if (member.kind === 198 /* SemicolonClassElement */) { writeLine(); write(";"); } else if (member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) { if (!member.body) { return emitCommentsOnNotEmittedNode(member); } writeLine(); emitLeadingComments(member); emitStart(member); emitStart(member.name); emitClassMemberPrefix(node, member); emitMemberAccessForPropertyName(member.name); emitEnd(member.name); write(" = "); emitFunctionDeclaration(member); emitEnd(member); write(";"); emitTrailingComments(member); } else if (member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */) { var accessors = ts.getAllAccessorDeclarations(node.members, member); if (member === accessors.firstAccessor) { writeLine(); emitStart(member); write("Object.defineProperty("); emitStart(member.name); emitClassMemberPrefix(node, member); write(", "); emitExpressionForPropertyName(member.name); emitEnd(member.name); write(", {"); increaseIndent(); if (accessors.getAccessor) { writeLine(); emitLeadingComments(accessors.getAccessor); write("get: "); emitStart(accessors.getAccessor); write("function "); emitSignatureAndBody(accessors.getAccessor); emitEnd(accessors.getAccessor); emitTrailingComments(accessors.getAccessor); write(","); } if (accessors.setAccessor) { writeLine(); emitLeadingComments(accessors.setAccessor); write("set: "); emitStart(accessors.setAccessor); write("function "); emitSignatureAndBody(accessors.setAccessor); emitEnd(accessors.setAccessor); emitTrailingComments(accessors.setAccessor); write(","); } writeLine(); write("enumerable: true,"); writeLine(); write("configurable: true"); decreaseIndent(); writeLine(); write("});"); emitEnd(member); } } }); } function emitMemberFunctionsForES6AndHigher(node) { for (var _a = 0, _b = node.members; _a < _b.length; _a++) { var member = _b[_a]; if ((member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) && !member.body) { emitCommentsOnNotEmittedNode(member); } else if (member.kind === 147 /* MethodDeclaration */ || member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */) { writeLine(); emitLeadingComments(member); emitStart(member); if (member.flags & 32 /* Static */) { write("static "); } if (member.kind === 149 /* GetAccessor */) { write("get "); } else if (member.kind === 150 /* SetAccessor */) { write("set "); } if (member.asteriskToken) { write("*"); } emit(member.name); emitSignatureAndBody(member); emitEnd(member); emitTrailingComments(member); } else if (member.kind === 198 /* SemicolonClassElement */) { writeLine(); write(";"); } } } function emitConstructor(node, baseTypeElement) { var saveConvertedLoopState = convertedLoopState; var saveTempFlags = tempFlags; var saveTempVariables = tempVariables; var saveTempParameters = tempParameters; convertedLoopState = undefined; tempFlags = 0; tempVariables = undefined; tempParameters = undefined; emitConstructorWorker(node, baseTypeElement); ts.Debug.assert(convertedLoopState === undefined); convertedLoopState = saveConvertedLoopState; tempFlags = saveTempFlags; tempVariables = saveTempVariables; tempParameters = saveTempParameters; } function emitConstructorWorker(node, baseTypeElement) { // Check if we have property assignment inside class declaration. // If there is property assignment, we need to emit constructor whether users define it or not // If there is no property assignment, we can omit constructor if users do not define it var hasInstancePropertyWithInitializer = false; // Emit the constructor overload pinned comments ts.forEach(node.members, function (member) { if (member.kind === 148 /* Constructor */ && !member.body) { emitCommentsOnNotEmittedNode(member); } // Check if there is any non-static property assignment if (member.kind === 145 /* PropertyDeclaration */ && member.initializer && (member.flags & 32 /* Static */) === 0) { hasInstancePropertyWithInitializer = true; } }); var ctor = ts.getFirstConstructorWithBody(node); // For target ES6 and above, if there is no user-defined constructor and there is no property assignment // do not emit constructor in class declaration. if (languageVersion >= 2 /* ES6 */ && !ctor && !hasInstancePropertyWithInitializer) { return; } if (ctor) { emitLeadingComments(ctor); } emitStart(ctor || node); if (languageVersion < 2 /* ES6 */) { write("function "); emitDeclarationName(node); emitSignatureParameters(ctor); } else { write("constructor"); if (ctor) { emitSignatureParameters(ctor); } else { // The ES2015 spec specifies in 14.5.14. Runtime Semantics: ClassDefinitionEvaluation: // If constructor is empty, then // If ClassHeritag_eopt is present and protoParent is not null, then // Let constructor be the result of parsing the source text // constructor(...args) { super (...args);} // using the syntactic grammar with the goal symbol MethodDefinition[~Yield]. // Else, // Let constructor be the result of parsing the source text // constructor( ){ } // using the syntactic grammar with the goal symbol MethodDefinition[~Yield]. // // While we could emit the '...args' rest parameter, certain later tools in the pipeline might // downlevel the '...args' portion less efficiently by naively copying the contents of 'arguments' to an array. // Instead, we'll avoid using a rest parameter and spread into the super call as // 'super(...arguments)' instead of 'super(...args)', as you can see below. write("()"); } } var startIndex = 0; write(" {"); increaseIndent(); if (ctor) { // Emit all the directive prologues (like "use strict"). These have to come before // any other preamble code we write (like parameter initializers). startIndex = emitDirectivePrologues(ctor.body.statements, /*startWithNewLine*/ true); emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements); } emitCaptureThisForNodeIfNecessary(node); var superCall; if (ctor) { emitDefaultValueAssignments(ctor); emitRestParameter(ctor); if (baseTypeElement) { superCall = getSuperCallAtGivenIndex(ctor, startIndex); if (superCall) { writeLine(); emit(superCall); } } emitParameterPropertyAssignments(ctor); } else { if (baseTypeElement) { writeLine(); emitStart(baseTypeElement); if (languageVersion < 2 /* ES6 */) { write("_super.apply(this, arguments);"); } else { // See comment above on using '...arguments' instead of '...args'. write("super(...arguments);"); } emitEnd(baseTypeElement); } } emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ false)); if (ctor) { var statements = ctor.body.statements; if (superCall) { statements = statements.slice(1); } emitLinesStartingAt(statements, startIndex); } emitTempDeclarations(/*newLine*/ true); writeLine(); if (ctor) { emitLeadingCommentsOfPosition(ctor.body.statements.end); } decreaseIndent(); emitToken(16 /* CloseBraceToken */, ctor ? ctor.body.statements.end : node.members.end); emitEnd(ctor || node); if (ctor) { emitTrailingComments(ctor); } } function emitClassExpression(node) { return emitClassLikeDeclaration(node); } function emitClassDeclaration(node) { return emitClassLikeDeclaration(node); } function emitClassLikeDeclaration(node) { if (languageVersion < 2 /* ES6 */) { emitClassLikeDeclarationBelowES6(node); } else { emitClassLikeDeclarationForES6AndHigher(node); } if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) { emitExportMemberAssignments(node.name); } } function emitClassLikeDeclarationForES6AndHigher(node) { var decoratedClassAlias; var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node); var isDecorated = ts.nodeIsDecorated(node); var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule; if (node.kind === 221 /* ClassDeclaration */) { if (rewriteAsClassExpression) { // When we emit an ES6 class that has a class decorator, we must tailor the // emit to certain specific cases. // // In the simplest case, we emit the class declaration as a let declaration, and // evaluate decorators after the close of the class body: // // TypeScript | Javascript // --------------------------------|------------------------------------ // @dec | let C = class C { // class C { | } // } | C = __decorate([dec], C); // --------------------------------|------------------------------------ // @dec | export let C = class C { // export class C { | } // } | C = __decorate([dec], C); // --------------------------------------------------------------------- // [Example 1] // // If a class declaration contains a reference to itself *inside* of the class body, // this introduces two bindings to the class: One outside of the class body, and one // inside of the class body. If we apply decorators as in [Example 1] above, there // is the possibility that the decorator `dec` will return a new value for the // constructor, which would result in the binding inside of the class no longer // pointing to the same reference as the binding outside of the class. // // As a result, we must instead rewrite all references to the class *inside* of the // class body to instead point to a local temporary alias for the class: // // TypeScript | Javascript // --------------------------------|------------------------------------ // @dec | let C_1 = class C { // class C { | static x() { return C_1.y; } // static x() { return C.y; } | } // static y = 1; | let C = C_1; // } | C.y = 1; // | C = C_1 = __decorate([dec], C); // --------------------------------|------------------------------------ // @dec | let C_1 = class C { // export class C { | static x() { return C_1.y; } // static x() { return C.y; } | } // static y = 1; | export let C = C_1; // } | C.y = 1; // | C = C_1 = __decorate([dec], C); // --------------------------------------------------------------------- // [Example 2] // // If a class declaration is the default export of a module, we instead emit // the export after the decorated declaration: // // TypeScript | Javascript // --------------------------------|------------------------------------ // @dec | let default_1 = class { // export default class { | } // } | default_1 = __decorate([dec], default_1); // | export default default_1; // --------------------------------|------------------------------------ // @dec | let C = class C { // export default class { | } // } | C = __decorate([dec], C); // | export default C; // --------------------------------------------------------------------- // [Example 3] // // If the class declaration is the default export and a reference to itself // inside of the class body, we must emit both an alias for the class *and* // move the export after the declaration: // // TypeScript | Javascript // --------------------------------|------------------------------------ // @dec | let C_1 = class C { // export default class C { | static x() { return C_1.y; } // static x() { return C.y; } | }; // static y = 1; | let C = C_1; // } | C.y = 1; // | C = C_1 = __decorate([dec], C); // | export default C; // --------------------------------------------------------------------- // [Example 4] // // NOTE: we reuse the same rewriting logic for cases when targeting ES6 and module kind is System. // Because of hoisting top level class declaration need to be emitted as class expressions. // Double bind case is only required if node is decorated. if (isDecorated && resolver.getNodeCheckFlags(node) & 524288 /* ClassWithBodyScopedClassBinding */) { decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default")); decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias; } if (isES6ExportedDeclaration(node) && !(node.flags & 512 /* Default */) && decoratedClassAlias === undefined) { write("export "); } if (decoratedClassAlias !== undefined) { write("let " + decoratedClassAlias); } else { if (!isHoistedDeclarationInSystemModule) { write("let "); } emitDeclarationName(node); } write(" = "); } else if (isES6ExportedDeclaration(node)) { write("export "); if (node.flags & 512 /* Default */) { write("default "); } } } // If the class has static properties, and it's a class expression, then we'll need // to specialize the emit a bit. for a class expression of the form: // // (class C { static a = 1; static b = 2; ... }) // // We'll emit: // // ((C_1 = class C { // // Normal class body // }, // C_1.a = 1, // C_1.b = 2, // C_1)); // var C_1; // // This keeps the expression as an expression, while ensuring that the static parts // of it have been initialized by the time it is used. var staticProperties = getInitializedProperties(node, /*isStatic*/ true); var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192 /* ClassExpression */; var generatedName; if (isClassExpressionWithStaticProperties) { generatedName = node.name ? getGeneratedNameForNode(node.name) : makeUniqueName("classExpression"); var synthesizedNode = ts.createSynthesizedNode(69 /* Identifier */); synthesizedNode.text = generatedName; recordTempDeclaration(synthesizedNode); write("("); increaseIndent(); emit(synthesizedNode); write(" = "); } write("class"); // emit name if // - node has a name // - this is default export with static initializers if (node.name || (node.flags & 512 /* Default */ && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) { write(" "); emitDeclarationName(node); } var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node); if (baseTypeNode) { write(" extends "); emit(baseTypeNode.expression); } write(" {"); increaseIndent(); writeLine(); emitConstructor(node, baseTypeNode); emitMemberFunctionsForES6AndHigher(node); decreaseIndent(); writeLine(); emitToken(16 /* CloseBraceToken */, node.members.end); if (rewriteAsClassExpression) { if (decoratedClassAlias !== undefined) { write(";"); writeLine(); if (isES6ExportedDeclaration(node) && !(node.flags & 512 /* Default */)) { write("export "); } write("let "); emitDeclarationName(node); write(" = " + decoratedClassAlias); } decoratedClassAliases[ts.getNodeId(node)] = undefined; write(";"); } // Emit static property assignment. Because classDeclaration is lexically evaluated, // it is safe to emit static property assignment after classDeclaration // From ES6 specification: // HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using // a lexical declaration such as a LexicalDeclaration or a ClassDeclaration. if (isClassExpressionWithStaticProperties) { for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) { var property = staticProperties_1[_a]; write(","); writeLine(); emitPropertyDeclaration(node, property, /*receiver*/ generatedName, /*isExpression*/ true); } write(","); writeLine(); write(generatedName); decreaseIndent(); write(")"); } else { writeLine(); emitPropertyDeclarations(node, staticProperties); emitDecoratorsOfClass(node, decoratedClassAlias); } if (!(node.flags & 1 /* Export */)) { return; } if (modulekind !== ts.ModuleKind.ES6) { emitExportMemberAssignment(node); } else { // If this is an exported class, but not on the top level (i.e. on an internal // module), export it if (node.flags & 512 /* Default */) { // if this is a top level default export of decorated class, write the export after the declaration. if (isDecorated) { writeLine(); write("export default "); emitDeclarationName(node); write(";"); } } else if (node.parent.kind !== 256 /* SourceFile */) { writeLine(); emitStart(node); emitModuleMemberName(node); write(" = "); emitDeclarationName(node); emitEnd(node); write(";"); } } } function emitClassLikeDeclarationBelowES6(node) { var isES6ExportedClass = isES6ExportedDeclaration(node); if (node.kind === 221 /* ClassDeclaration */) { if (isES6ExportedClass && !(node.flags & 512 /* Default */)) { write("export "); } // source file level classes in system modules are hoisted so 'var's for them are already defined if (!shouldHoistDeclarationInSystemJsModule(node)) { write("var "); } emitDeclarationName(node); write(" = "); } write("(function ("); var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node); if (baseTypeNode) { write("_super"); } write(") {"); var saveTempFlags = tempFlags; var saveTempVariables = tempVariables; var saveTempParameters = tempParameters; var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames; var saveConvertedLoopState = convertedLoopState; convertedLoopState = undefined; tempFlags = 0; tempVariables = undefined; tempParameters = undefined; computedPropertyNamesToGeneratedNames = undefined; increaseIndent(); if (baseTypeNode) { writeLine(); emitStart(baseTypeNode); write("__extends("); emitDeclarationName(node); write(", _super);"); emitEnd(baseTypeNode); } writeLine(); emitConstructor(node, baseTypeNode); emitMemberFunctionsForES5AndLower(node); emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ true)); writeLine(); emitDecoratorsOfClass(node, /*decoratedClassAlias*/ undefined); writeLine(); emitToken(16 /* CloseBraceToken */, node.members.end, function () { write("return "); emitDeclarationName(node); }); write(";"); emitTempDeclarations(/*newLine*/ true); ts.Debug.assert(convertedLoopState === undefined); convertedLoopState = saveConvertedLoopState; tempFlags = saveTempFlags; tempVariables = saveTempVariables; tempParameters = saveTempParameters; computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames; decreaseIndent(); writeLine(); emitToken(16 /* CloseBraceToken */, node.members.end); emitStart(node); write("("); if (baseTypeNode) { emit(baseTypeNode.expression); } write("))"); if (node.kind === 221 /* ClassDeclaration */) { write(";"); } emitEnd(node); if (node.kind === 221 /* ClassDeclaration */ && !isES6ExportedClass) { emitExportMemberAssignment(node); } else if (isES6ExportedClass && (node.flags & 512 /* Default */)) { writeLine(); write("export default "); emitDeclarationName(node); write(";"); } } function emitClassMemberPrefix(node, member) { emitDeclarationName(node); if (!(member.flags & 32 /* Static */)) { write(".prototype"); } } function emitDecoratorsOfClass(node, decoratedClassAlias) { emitDecoratorsOfMembers(node, /*staticFlag*/ 0); emitDecoratorsOfMembers(node, 32 /* Static */); emitDecoratorsOfConstructor(node, decoratedClassAlias); } function emitDecoratorsOfConstructor(node, decoratedClassAlias) { var decorators = node.decorators; var constructor = ts.getFirstConstructorWithBody(node); var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; }); // skip decoration of the constructor if neither it nor its parameters are decorated if (!decorators && !firstParameterDecorator) { return; } // Emit the call to __decorate. Given the class: // // @dec // class C { // } // // The emit for the class is: // // C = __decorate([dec], C); // writeLine(); emitStart(node.decorators || firstParameterDecorator); emitDeclarationName(node); if (decoratedClassAlias !== undefined) { write(" = " + decoratedClassAlias); } write(" = __decorate(["); increaseIndent(); writeLine(); var decoratorCount = decorators ? decorators.length : 0; var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); }); if (firstParameterDecorator) { argumentsWritten += emitDecoratorsOfParameters(constructor, /*leadingComma*/ argumentsWritten > 0); } emitSerializedTypeMetadata(node, /*leadingComma*/ argumentsWritten >= 0); decreaseIndent(); writeLine(); write("], "); emitDeclarationName(node); write(")"); emitEnd(node.decorators || firstParameterDecorator); write(";"); writeLine(); } function emitDecoratorsOfMembers(node, staticFlag) { for (var _a = 0, _b = node.members; _a < _b.length; _a++) { var member = _b[_a]; // only emit members in the correct group if ((member.flags & 32 /* Static */) !== staticFlag) { continue; } // skip members that cannot be decorated (such as the constructor) if (!ts.nodeCanBeDecorated(member)) { continue; } // skip an accessor declaration if it is not the first accessor var decorators = void 0; var functionLikeMember = void 0; if (ts.isAccessor(member)) { var accessors = ts.getAllAccessorDeclarations(node.members, member); if (member !== accessors.firstAccessor) { continue; } // get the decorators from the first accessor with decorators decorators = accessors.firstAccessor.decorators; if (!decorators && accessors.secondAccessor) { decorators = accessors.secondAccessor.decorators; } // we only decorate parameters of the set accessor functionLikeMember = accessors.setAccessor; } else { decorators = member.decorators; // we only decorate the parameters here if this is a method if (member.kind === 147 /* MethodDeclaration */) { functionLikeMember = member; } } var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; }); // skip a member if it or any of its parameters are not decorated if (!decorators && !firstParameterDecorator) { continue; } // Emit the call to __decorate. Given the following: // // class C { // @dec method(@dec2 x) {} // @dec get accessor() {} // @dec prop; // } // // The emit for a method is: // // __decorate([ // dec, // __param(0, dec2), // __metadata("design:type", Function), // __metadata("design:paramtypes", [Object]), // __metadata("design:returntype", void 0) // ], C.prototype, "method", undefined); // // The emit for an accessor is: // // __decorate([ // dec // ], C.prototype, "accessor", undefined); // // The emit for a property is: // // __decorate([ // dec // ], C.prototype, "prop"); // writeLine(); emitStart(decorators || firstParameterDecorator); write("__decorate(["); increaseIndent(); writeLine(); var decoratorCount = decorators ? decorators.length : 0; var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); }); if (firstParameterDecorator) { argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0); } emitSerializedTypeMetadata(member, argumentsWritten > 0); decreaseIndent(); writeLine(); write("], "); emitClassMemberPrefix(node, member); write(", "); emitExpressionForPropertyName(member.name); if (languageVersion > 0 /* ES3 */) { if (member.kind !== 145 /* PropertyDeclaration */) { // We emit `null` here to indicate to `__decorate` that it can invoke `Object.getOwnPropertyDescriptor` directly. // We have this extra argument here so that we can inject an explicit property descriptor at a later date. write(", null"); } else { // We emit `void 0` here to indicate to `__decorate` that it can invoke `Object.defineProperty` directly, but that it // should not invoke `Object.getOwnPropertyDescriptor`. write(", void 0"); } } write(")"); emitEnd(decorators || firstParameterDecorator); write(";"); writeLine(); } } function emitDecoratorsOfParameters(node, leadingComma) { var argumentsWritten = 0; if (node) { var parameterIndex_1 = 0; for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) { var parameter = _b[_a]; if (ts.nodeIsDecorated(parameter)) { var decorators = parameter.decorators; argumentsWritten += emitList(decorators, 0, decorators.length, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ leadingComma, /*noTrailingNewLine*/ true, function (decorator) { write("__param(" + parameterIndex_1 + ", "); emit(decorator.expression); write(")"); }); leadingComma = true; } parameterIndex_1++; } } return argumentsWritten; } function shouldEmitTypeMetadata(node) { // This method determines whether to emit the "design:type" metadata based on the node's kind. // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata // compiler option is set. switch (node.kind) { case 147 /* MethodDeclaration */: case 149 /* GetAccessor */: case 150 /* SetAccessor */: case 145 /* PropertyDeclaration */: return true; } return false; } function shouldEmitReturnTypeMetadata(node) { // This method determines whether to emit the "design:returntype" metadata based on the node's kind. // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata // compiler option is set. switch (node.kind) { case 147 /* MethodDeclaration */: return true; } return false; } function shouldEmitParamTypesMetadata(node) { // This method determines whether to emit the "design:paramtypes" metadata based on the node's kind. // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata // compiler option is set. switch (node.kind) { case 221 /* ClassDeclaration */: case 147 /* MethodDeclaration */: case 150 /* SetAccessor */: return true; } return false; } /** Serializes the type of a declaration to an appropriate JS constructor value. Used by the __metadata decorator for a class member. */ function emitSerializedTypeOfNode(node) { // serialization of the type of a declaration uses the following rules: // // * The serialized type of a ClassDeclaration is "Function" // * The serialized type of a ParameterDeclaration is the serialized type of its type annotation. // * The serialized type of a PropertyDeclaration is the serialized type of its type annotation. // * The serialized type of an AccessorDeclaration is the serialized type of the return type annotation of its getter or parameter type annotation of its setter. // * The serialized type of any other FunctionLikeDeclaration is "Function". // * The serialized type of any other node is "void 0". // // For rules on serializing type annotations, see `serializeTypeNode`. switch (node.kind) { case 221 /* ClassDeclaration */: write("Function"); return; case 145 /* PropertyDeclaration */: emitSerializedTypeNode(node.type); return; case 142 /* Parameter */: emitSerializedTypeNode(node.type); return; case 149 /* GetAccessor */: emitSerializedTypeNode(node.type); return; case 150 /* SetAccessor */: emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node)); return; } if (ts.isFunctionLike(node)) { write("Function"); return; } write("void 0"); } function emitSerializedTypeNode(node) { if (node) { switch (node.kind) { case 103 /* VoidKeyword */: write("void 0"); return; case 164 /* ParenthesizedType */: emitSerializedTypeNode(node.type); return; case 156 /* FunctionType */: case 157 /* ConstructorType */: write("Function"); return; case 160 /* ArrayType */: case 161 /* TupleType */: write("Array"); return; case 154 /* TypePredicate */: case 120 /* BooleanKeyword */: write("Boolean"); return; case 132 /* StringKeyword */: case 166 /* LiteralType */: write("String"); return; case 130 /* NumberKeyword */: write("Number"); return; case 133 /* SymbolKeyword */: write("Symbol"); return; case 155 /* TypeReference */: emitSerializedTypeReferenceNode(node); return; case 158 /* TypeQuery */: case 159 /* TypeLiteral */: case 162 /* UnionType */: case 163 /* IntersectionType */: case 117 /* AnyKeyword */: case 165 /* ThisType */: break; default: ts.Debug.fail("Cannot serialize unexpected type node."); break; } } write("Object"); } /** Serializes a TypeReferenceNode to an appropriate JS constructor value. Used by the __metadata decorator. */ function emitSerializedTypeReferenceNode(node) { var location = node.parent; while (ts.isDeclaration(location) || ts.isTypeNode(location)) { location = location.parent; } // Clone the type name and parent it to a location outside of the current declaration. var typeName = ts.cloneEntityName(node.typeName, location); var result = resolver.getTypeReferenceSerializationKind(typeName); switch (result) { case ts.TypeReferenceSerializationKind.Unknown: var temp = createAndRecordTempVariable(0 /* Auto */); write("(typeof ("); emitNodeWithoutSourceMap(temp); write(" = "); emitEntityNameAsExpression(typeName, /*useFallback*/ true); write(") === 'function' && "); emitNodeWithoutSourceMap(temp); write(") || Object"); break; case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue: emitEntityNameAsExpression(typeName, /*useFallback*/ false); break; case ts.TypeReferenceSerializationKind.VoidType: write("void 0"); break; case ts.TypeReferenceSerializationKind.BooleanType: write("Boolean"); break; case ts.TypeReferenceSerializationKind.NumberLikeType: write("Number"); break; case ts.TypeReferenceSerializationKind.StringLikeType: write("String"); break; case ts.TypeReferenceSerializationKind.ArrayLikeType: write("Array"); break; case ts.TypeReferenceSerializationKind.ESSymbolType: if (languageVersion < 2 /* ES6 */) { write("typeof Symbol === 'function' ? Symbol : Object"); } else { write("Symbol"); } break; case ts.TypeReferenceSerializationKind.TypeWithCallSignature: write("Function"); break; case ts.TypeReferenceSerializationKind.ObjectType: write("Object"); break; } } /** Serializes the parameter types of a function or the constructor of a class. Used by the __metadata decorator for a method or set accessor. */ function emitSerializedParameterTypesOfNode(node) { // serialization of parameter types uses the following rules: // // * If the declaration is a class, the parameters of the first constructor with a body are used. // * If the declaration is function-like and has a body, the parameters of the function are used. // // For the rules on serializing the type of each parameter declaration, see `serializeTypeOfDeclaration`. if (node) { var valueDeclaration = void 0; if (node.kind === 221 /* ClassDeclaration */) { valueDeclaration = ts.getFirstConstructorWithBody(node); } else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) { valueDeclaration = node; } if (valueDeclaration) { var parameters = valueDeclaration.parameters; var skipThisCount = parameters.length && parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */ ? 1 : 0; var parameterCount = parameters.length; if (parameterCount > skipThisCount) { for (var i = skipThisCount; i < parameterCount; i++) { if (i > skipThisCount) { write(", "); } if (parameters[i].dotDotDotToken) { var parameterType = parameters[i].type; if (parameterType && parameterType.kind === 160 /* ArrayType */) { parameterType = parameterType.elementType; } else if (parameterType && parameterType.kind === 155 /* TypeReference */ && parameterType.typeArguments && parameterType.typeArguments.length === 1) { parameterType = parameterType.typeArguments[0]; } else { parameterType = undefined; } emitSerializedTypeNode(parameterType); } else { emitSerializedTypeOfNode(parameters[i]); } } } } } } /** Serializes the return type of function. Used by the __metadata decorator for a method. */ function emitSerializedReturnTypeOfNode(node) { if (node && ts.isFunctionLike(node)) { if (node.type) { emitSerializedTypeNode(node.type); return; } else if (ts.isAsyncFunctionLike(node)) { write("Promise"); return; } } write("void 0"); } function emitSerializedTypeMetadata(node, writeComma) { // This method emits the serialized type metadata for a decorator target. // The caller should have already tested whether the node has decorators. var argumentsWritten = 0; if (compilerOptions.emitDecoratorMetadata) { if (shouldEmitTypeMetadata(node)) { if (writeComma) { write(", "); } writeLine(); write("__metadata('design:type', "); emitSerializedTypeOfNode(node); write(")"); argumentsWritten++; } if (shouldEmitParamTypesMetadata(node)) { if (writeComma || argumentsWritten) { write(", "); } writeLine(); write("__metadata('design:paramtypes', ["); emitSerializedParameterTypesOfNode(node); write("])"); argumentsWritten++; } if (shouldEmitReturnTypeMetadata(node)) { if (writeComma || argumentsWritten) { write(", "); } writeLine(); write("__metadata('design:returntype', "); emitSerializedReturnTypeOfNode(node); write(")"); argumentsWritten++; } } return argumentsWritten; } function emitInterfaceDeclaration(node) { emitCommentsOnNotEmittedNode(node); } function shouldEmitEnumDeclaration(node) { var isConstEnum = ts.isConst(node); return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules; } function emitEnumDeclaration(node) { // const enums are completely erased during compilation. if (!shouldEmitEnumDeclaration(node)) { return; } if (!shouldHoistDeclarationInSystemJsModule(node)) { // do not emit var if variable was already hoisted var isES6ExportedEnum = isES6ExportedDeclaration(node); if (!(node.flags & 1 /* Export */) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224 /* EnumDeclaration */))) { emitStart(node); if (isES6ExportedEnum) { write("export "); } write("var "); emit(node.name); emitEnd(node); write(";"); } } writeLine(); emitStart(node); write("(function ("); emitStart(node.name); write(getGeneratedNameForNode(node)); emitEnd(node.name); write(") {"); increaseIndent(); emitLines(node.members); decreaseIndent(); writeLine(); emitToken(16 /* CloseBraceToken */, node.members.end); write(")("); emitModuleMemberName(node); write(" || ("); emitModuleMemberName(node); write(" = {}));"); emitEnd(node); if (!isES6ExportedDeclaration(node) && node.flags & 1 /* Export */ && !shouldHoistDeclarationInSystemJsModule(node)) { // do not emit var if variable was already hoisted writeLine(); emitStart(node); write("var "); emit(node.name); write(" = "); emitModuleMemberName(node); emitEnd(node); write(";"); } if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) { if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) { // write the call to exporter for enum writeLine(); write(exportFunctionForFile + "(\""); emitDeclarationName(node); write("\", "); emitDeclarationName(node); write(");"); } emitExportMemberAssignments(node.name); } } function emitEnumMember(node) { var enumParent = node.parent; emitStart(node); write(getGeneratedNameForNode(enumParent)); write("["); write(getGeneratedNameForNode(enumParent)); write("["); emitExpressionForPropertyName(node.name); write("] = "); writeEnumMemberDeclarationValue(node); write("] = "); emitExpressionForPropertyName(node.name); emitEnd(node); write(";"); } function writeEnumMemberDeclarationValue(member) { var value = resolver.getConstantValue(member); if (value !== undefined) { write(value.toString()); return; } else if (member.initializer) { emit(member.initializer); } else { write("undefined"); } } function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) { if (moduleDeclaration.body && moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) { var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body); return recursiveInnerModule || moduleDeclaration.body; } } function shouldEmitModuleDeclaration(node) { return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules); } function isModuleMergedWithES6Class(node) { return languageVersion === 2 /* ES6 */ && !!(resolver.getNodeCheckFlags(node) & 32768 /* LexicalModuleMergesWithClass */); } function isFirstDeclarationOfKind(node, declarations, kind) { return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; }); } function emitModuleDeclaration(node) { // Emit only if this module is non-ambient. var shouldEmit = shouldEmitModuleDeclaration(node); if (!shouldEmit) { return emitCommentsOnNotEmittedNode(node); } var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node); var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node); if (emitVarForModule) { var isES6ExportedNamespace = isES6ExportedDeclaration(node); if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225 /* ModuleDeclaration */)) { emitStart(node); if (isES6ExportedNamespace) { write("export "); } write("var "); emit(node.name); write(";"); emitEnd(node); writeLine(); } } emitStart(node); write("(function ("); emitStart(node.name); write(getGeneratedNameForNode(node)); emitEnd(node.name); write(") "); ts.Debug.assert(node.body !== undefined); // node.body must exist, as this is a non-ambient module if (node.body.kind === 226 /* ModuleBlock */) { var saveConvertedLoopState = convertedLoopState; var saveTempFlags = tempFlags; var saveTempVariables = tempVariables; convertedLoopState = undefined; tempFlags = 0; tempVariables = undefined; emit(node.body); ts.Debug.assert(convertedLoopState === undefined); convertedLoopState = saveConvertedLoopState; tempFlags = saveTempFlags; tempVariables = saveTempVariables; } else { write("{"); increaseIndent(); emitCaptureThisForNodeIfNecessary(node); writeLine(); emit(node.body); decreaseIndent(); writeLine(); var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body; emitToken(16 /* CloseBraceToken */, moduleBlock.statements.end); } write(")("); // write moduleDecl = containingModule.m only if it is not exported es6 module member if ((node.flags & 1 /* Export */) && !isES6ExportedDeclaration(node)) { emit(node.name); write(" = "); } emitModuleMemberName(node); write(" || ("); emitModuleMemberName(node); write(" = {}));"); emitEnd(node); if (!isES6ExportedDeclaration(node) && node.name.kind === 69 /* Identifier */ && node.parent === currentSourceFile) { if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) { writeLine(); write(exportFunctionForFile + "(\""); emitDeclarationName(node); write("\", "); emitDeclarationName(node); write(");"); } emitExportMemberAssignments(node.name); } } /* * Some bundlers (SystemJS builder) sometimes want to rename dependencies. * Here we check if alternative name was provided for a given moduleName and return it if possible. */ function tryRenameExternalModule(moduleName) { if (renamedDependencies && moduleName.text in renamedDependencies) { return "\"" + renamedDependencies[moduleName.text] + "\""; } return undefined; } function emitRequire(moduleName) { if (moduleName.kind === 9 /* StringLiteral */) { write("require("); var text = tryRenameExternalModule(moduleName); if (text) { write(text); } else { emitStart(moduleName); emitLiteral(moduleName); emitEnd(moduleName); } emitToken(18 /* CloseParenToken */, moduleName.end); } else { write("require()"); } } function getNamespaceDeclarationNode(node) { if (node.kind === 229 /* ImportEqualsDeclaration */) { return node; } var importClause = node.importClause; if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232 /* NamespaceImport */) { return importClause.namedBindings; } } function isDefaultImport(node) { return node.kind === 230 /* ImportDeclaration */ && node.importClause && !!node.importClause.name; } function emitExportImportAssignments(node) { if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) { emitExportMemberAssignments(node.name); } ts.forEachChild(node, emitExportImportAssignments); } function emitImportDeclaration(node) { if (modulekind !== ts.ModuleKind.ES6) { return emitExternalImportDeclaration(node); } // ES6 import if (node.importClause) { var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause); var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, /* checkChildren */ true); if (shouldEmitDefaultBindings || shouldEmitNamedBindings) { write("import "); emitStart(node.importClause); if (shouldEmitDefaultBindings) { emit(node.importClause.name); if (shouldEmitNamedBindings) { write(", "); } } if (shouldEmitNamedBindings) { emitLeadingComments(node.importClause.namedBindings); emitStart(node.importClause.namedBindings); if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) { write("* as "); emit(node.importClause.namedBindings.name); } else { write("{ "); emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration); write(" }"); } emitEnd(node.importClause.namedBindings); emitTrailingComments(node.importClause.namedBindings); } emitEnd(node.importClause); write(" from "); emit(node.moduleSpecifier); write(";"); } } else { write("import "); emit(node.moduleSpecifier); write(";"); } } function emitExternalImportDeclaration(node) { if (ts.contains(externalImports, node)) { var isExportedImport = node.kind === 229 /* ImportEqualsDeclaration */ && (node.flags & 1 /* Export */) !== 0; var namespaceDeclaration = getNamespaceDeclarationNode(node); var varOrConst = (languageVersion <= 1 /* ES5 */) ? "var " : "const "; if (modulekind !== ts.ModuleKind.AMD) { emitLeadingComments(node); emitStart(node); if (namespaceDeclaration && !isDefaultImport(node)) { // import x = require("foo") // import * as x from "foo" if (!isExportedImport) { write(varOrConst); } ; emitModuleMemberName(namespaceDeclaration); write(" = "); } else { // import "foo" // import x from "foo" // import { x, y } from "foo" // import d, * as x from "foo" // import d, { x, y } from "foo" var isNakedImport = node.kind === 230 /* ImportDeclaration */ && !node.importClause; if (!isNakedImport) { write(varOrConst); write(getGeneratedNameForNode(node)); write(" = "); } } emitRequire(ts.getExternalModuleName(node)); if (namespaceDeclaration && isDefaultImport(node)) { // import d, * as x from "foo" write(", "); emitModuleMemberName(namespaceDeclaration); write(" = "); write(getGeneratedNameForNode(node)); } write(";"); emitEnd(node); emitExportImportAssignments(node); emitTrailingComments(node); } else { if (isExportedImport) { emitModuleMemberName(namespaceDeclaration); write(" = "); emit(namespaceDeclaration.name); write(";"); } else if (namespaceDeclaration && isDefaultImport(node)) { // import d, * as x from "foo" write(varOrConst); emitModuleMemberName(namespaceDeclaration); write(" = "); write(getGeneratedNameForNode(node)); write(";"); } emitExportImportAssignments(node); } } } function emitImportEqualsDeclaration(node) { if (ts.isExternalModuleImportEqualsDeclaration(node)) { emitExternalImportDeclaration(node); return; } // preserve old compiler's behavior: emit 'var' for import declaration (even if we do not consider them referenced) when // - current file is not external module // - import declaration is top level and target is value imported by entity name if (resolver.isReferencedAliasDeclaration(node) || (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) { emitLeadingComments(node); emitStart(node); // variable declaration for import-equals declaration can be hoisted in system modules // in this case 'var' should be omitted and emit should contain only initialization var variableDeclarationIsHoisted = shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true); // is it top level export import v = a.b.c in system module? // if yes - it needs to be rewritten as exporter('v', v = a.b.c) var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ true); if (!variableDeclarationIsHoisted) { ts.Debug.assert(!isExported); if (isES6ExportedDeclaration(node)) { write("export "); write("var "); } else if (!(node.flags & 1 /* Export */)) { write("var "); } } if (isExported) { write(exportFunctionForFile + "(\""); emitNodeWithoutSourceMap(node.name); write("\", "); } emitModuleMemberName(node); write(" = "); emit(node.moduleReference); if (isExported) { write(")"); } write(";"); emitEnd(node); emitExportImportAssignments(node); emitTrailingComments(node); } } function emitExportDeclaration(node) { ts.Debug.assert(modulekind !== ts.ModuleKind.System); if (modulekind !== ts.ModuleKind.ES6) { if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) { emitStart(node); var generatedName = getGeneratedNameForNode(node); if (node.exportClause) { // export { x, y, ... } from "foo" if (modulekind !== ts.ModuleKind.AMD) { write("var "); write(generatedName); write(" = "); emitRequire(ts.getExternalModuleName(node)); write(";"); } for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) { var specifier = _b[_a]; if (resolver.isValueAliasDeclaration(specifier)) { writeLine(); emitStart(specifier); emitContainingModuleName(specifier); write("."); emitNodeWithCommentsAndWithoutSourcemap(specifier.name); write(" = "); write(generatedName); write("."); emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name); write(";"); emitEnd(specifier); } } } else { // export * from "foo" if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) { writeLine(); write("__export("); if (modulekind !== ts.ModuleKind.AMD) { emitRequire(ts.getExternalModuleName(node)); } else { write(generatedName); } write(");"); } } emitEnd(node); } } else { if (!node.exportClause || resolver.isValueAliasDeclaration(node)) { write("export "); if (node.exportClause) { // export { x, y, ... } write("{ "); emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration); write(" }"); } else { write("*"); } if (node.moduleSpecifier) { write(" from "); emit(node.moduleSpecifier); } write(";"); } } } function emitExportOrImportSpecifierList(specifiers, shouldEmit) { ts.Debug.assert(modulekind === ts.ModuleKind.ES6); var needsComma = false; for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) { var specifier = specifiers_1[_a]; if (shouldEmit(specifier)) { if (needsComma) { write(", "); } if (specifier.propertyName) { emit(specifier.propertyName); write(" as "); } emit(specifier.name); needsComma = true; } } } function emitExportAssignment(node) { if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) { if (modulekind === ts.ModuleKind.ES6) { writeLine(); emitStart(node); write("export default "); var expression = node.expression; emit(expression); if (expression.kind !== 220 /* FunctionDeclaration */ && expression.kind !== 221 /* ClassDeclaration */) { write(";"); } emitEnd(node); } else { writeLine(); emitStart(node); if (modulekind === ts.ModuleKind.System) { write(exportFunctionForFile + "(\"default\","); emit(node.expression); write(")"); } else { emitEs6ExportDefaultCompat(node); emitContainingModuleName(node); if (languageVersion === 0 /* ES3 */) { write('["default"] = '); } else { write(".default = "); } emit(node.expression); } write(";"); emitEnd(node); } } } function collectExternalModuleInfo(sourceFile) { externalImports = []; exportSpecifiers = ts.createMap(); exportEquals = undefined; hasExportStarsToExportValues = false; for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) { var node = _b[_a]; switch (node.kind) { case 230 /* ImportDeclaration */: if (!node.importClause || resolver.isReferencedAliasDeclaration(node.importClause, /*checkChildren*/ true)) { // import "mod" // import x from "mod" where x is referenced // import * as x from "mod" where x is referenced // import { x, y } from "mod" where at least one import is referenced externalImports.push(node); } break; case 229 /* ImportEqualsDeclaration */: if (node.moduleReference.kind === 240 /* ExternalModuleReference */ && resolver.isReferencedAliasDeclaration(node)) { // import x = require("mod") where x is referenced externalImports.push(node); } break; case 236 /* ExportDeclaration */: if (node.moduleSpecifier) { if (!node.exportClause) { // export * from "mod" if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) { externalImports.push(node); hasExportStarsToExportValues = true; } } else if (resolver.isValueAliasDeclaration(node)) { // export { x, y } from "mod" where at least one export is a value symbol externalImports.push(node); } } else { // export { x, y } for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) { var specifier = _d[_c]; var name_30 = (specifier.propertyName || specifier.name).text; (exportSpecifiers[name_30] || (exportSpecifiers[name_30] = [])).push(specifier); } } break; case 235 /* ExportAssignment */: if (node.isExportEquals && !exportEquals) { // export = x exportEquals = node; } break; } } } function emitExportStarHelper() { if (hasExportStarsToExportValues) { writeLine(); write("function __export(m) {"); increaseIndent(); writeLine(); write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];"); decreaseIndent(); writeLine(); write("}"); } } function getLocalNameForExternalImport(node) { var namespaceDeclaration = getNamespaceDeclarationNode(node); if (namespaceDeclaration && !isDefaultImport(node)) { return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name); } if (node.kind === 230 /* ImportDeclaration */ && node.importClause) { return getGeneratedNameForNode(node); } if (node.kind === 236 /* ExportDeclaration */ && node.moduleSpecifier) { return getGeneratedNameForNode(node); } } function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) { if (emitRelativePathAsModuleName) { var name_31 = getExternalModuleNameFromDeclaration(host, resolver, importNode); if (name_31) { return "\"" + name_31 + "\""; } } var moduleName = ts.getExternalModuleName(importNode); if (moduleName.kind === 9 /* StringLiteral */) { return tryRenameExternalModule(moduleName) || getLiteralText(moduleName); } return undefined; } function emitVariableDeclarationsForImports() { if (externalImports.length === 0) { return; } writeLine(); var started = false; for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) { var importNode = externalImports_1[_a]; // do not create variable declaration for exports and imports that lack import clause var skipNode = importNode.kind === 236 /* ExportDeclaration */ || (importNode.kind === 230 /* ImportDeclaration */ && !importNode.importClause); if (skipNode) { continue; } if (!started) { write("var "); started = true; } else { write(", "); } write(getLocalNameForExternalImport(importNode)); } if (started) { write(";"); } } function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) { // when resolving exports local exported entries/indirect exported entries in the module // should always win over entries with similar names that were added via star exports // to support this we store names of local/indirect exported entries in a set. // this set is used to filter names brought by star exports. if (!hasExportStarsToExportValues) { // local names set is needed only in presence of star exports return undefined; } // local names set should only be added if we have anything exported if (!exportedDeclarations && !ts.someProperties(exportSpecifiers)) { // no exported declarations (export var ...) or export specifiers (export {x}) // check if we have any non star export declarations. var hasExportDeclarationWithExportClause = false; for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) { var externalImport = externalImports_2[_a]; if (externalImport.kind === 236 /* ExportDeclaration */ && externalImport.exportClause) { hasExportDeclarationWithExportClause = true; break; } } if (!hasExportDeclarationWithExportClause) { // we still need to emit exportStar helper return emitExportStarFunction(/*localNames*/ undefined); } } var exportedNamesStorageRef = makeUniqueName("exportedNames"); writeLine(); write("var " + exportedNamesStorageRef + " = {"); increaseIndent(); var started = false; if (exportedDeclarations) { for (var i = 0; i < exportedDeclarations.length; i++) { // write name of exported declaration, i.e 'export var x...' writeExportedName(exportedDeclarations[i]); } } if (exportSpecifiers) { for (var n in exportSpecifiers) { for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) { var specifier = _c[_b]; // write name of export specified, i.e. 'export {x}' writeExportedName(specifier.name); } } } for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) { var externalImport = externalImports_3[_d]; if (externalImport.kind !== 236 /* ExportDeclaration */) { continue; } var exportDecl = externalImport; if (!exportDecl.exportClause) { // export * from ... continue; } for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) { var element = _f[_e]; // write name of indirectly exported entry, i.e. 'export {x} from ...' writeExportedName(element.name || element.propertyName); } } decreaseIndent(); writeLine(); write("};"); return emitExportStarFunction(exportedNamesStorageRef); function emitExportStarFunction(localNames) { var exportStarFunction = makeUniqueName("exportStar"); writeLine(); // define an export star helper function write("function " + exportStarFunction + "(m) {"); increaseIndent(); writeLine(); write("var exports = {};"); writeLine(); write("for(var n in m) {"); increaseIndent(); writeLine(); write("if (n !== \"default\""); if (localNames) { write("&& !" + localNames + ".hasOwnProperty(n)"); } write(") exports[n] = m[n];"); decreaseIndent(); writeLine(); write("}"); writeLine(); write(exportFunctionForFile + "(exports);"); decreaseIndent(); writeLine(); write("}"); return exportStarFunction; } function writeExportedName(node) { // do not record default exports // they are local to module and never overwritten (explicitly skipped) by star export if (node.kind !== 69 /* Identifier */ && node.flags & 512 /* Default */) { return; } if (started) { write(","); } else { started = true; } writeLine(); write("'"); if (node.kind === 69 /* Identifier */) { emitNodeWithCommentsAndWithoutSourcemap(node); } else { emitDeclarationName(node); } write("': true"); } } function processTopLevelVariableAndFunctionDeclarations(node) { // per ES6 spec: // 15.2.1.16.4 ModuleDeclarationInstantiation() Concrete Method // - var declarations are initialized to undefined - 14.a.ii // - function/generator declarations are instantiated - 16.a.iv // this means that after module is instantiated but before its evaluation // exported functions are already accessible at import sites // in theory we should hoist only exported functions and its dependencies // in practice to simplify things we'll hoist all source level functions and variable declaration // including variables declarations for module and class declarations var hoistedVars; var hoistedFunctionDeclarations; var exportedDeclarations; visit(node); if (hoistedVars) { writeLine(); write("var "); var seen = ts.createMap(); for (var i = 0; i < hoistedVars.length; i++) { var local = hoistedVars[i]; var name_32 = local.kind === 69 /* Identifier */ ? local : local.name; if (name_32) { // do not emit duplicate entries (in case of declaration merging) in the list of hoisted variables var text = ts.unescapeIdentifier(name_32.text); if (text in seen) { continue; } else { seen[text] = text; } } if (i !== 0) { write(", "); } if (local.kind === 221 /* ClassDeclaration */ || local.kind === 225 /* ModuleDeclaration */ || local.kind === 224 /* EnumDeclaration */) { emitDeclarationName(local); } else { emit(local); } var flags = ts.getCombinedNodeFlags(local.kind === 69 /* Identifier */ ? local.parent : local); if (flags & 1 /* Export */) { if (!exportedDeclarations) { exportedDeclarations = []; } exportedDeclarations.push(local); } } write(";"); } if (hoistedFunctionDeclarations) { for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) { var f = hoistedFunctionDeclarations_1[_a]; writeLine(); emit(f); if (f.flags & 1 /* Export */) { if (!exportedDeclarations) { exportedDeclarations = []; } exportedDeclarations.push(f); } } } return exportedDeclarations; function visit(node) { if (node.flags & 2 /* Ambient */) { return; } if (node.kind === 220 /* FunctionDeclaration */) { if (!hoistedFunctionDeclarations) { hoistedFunctionDeclarations = []; } hoistedFunctionDeclarations.push(node); return; } if (node.kind === 221 /* ClassDeclaration */) { if (!hoistedVars) { hoistedVars = []; } hoistedVars.push(node); return; } if (node.kind === 224 /* EnumDeclaration */) { if (shouldEmitEnumDeclaration(node)) { if (!hoistedVars) { hoistedVars = []; } hoistedVars.push(node); } return; } if (node.kind === 225 /* ModuleDeclaration */) { if (shouldEmitModuleDeclaration(node)) { if (!hoistedVars) { hoistedVars = []; } hoistedVars.push(node); } return; } if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) { if (shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ false)) { var name_33 = node.name; if (name_33.kind === 69 /* Identifier */) { if (!hoistedVars) { hoistedVars = []; } hoistedVars.push(name_33); } else { ts.forEachChild(name_33, visit); } } return; } if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) { if (!hoistedVars) { hoistedVars = []; } hoistedVars.push(node.name); return; } if (ts.isBindingPattern(node)) { ts.forEach(node.elements, visit); return; } if (!ts.isDeclaration(node)) { ts.forEachChild(node, visit); } } } function shouldHoistVariable(node, checkIfSourceFileLevelDecl) { if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) { return false; } // hoist variable if // - it is not block scoped // - it is top level block scoped // if block scoped variables are nested in some another block then // no other functions can use them except ones that are defined at least in the same block return (ts.getCombinedNodeFlags(node) & 3072 /* BlockScoped */) === 0 || ts.getEnclosingBlockScopeContainer(node).kind === 256 /* SourceFile */; } function isCurrentFileSystemExternalModule() { return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule; } function emitSystemModuleBody(node, dependencyGroups, startIndex) { // shape of the body in system modules: // function (exports) { // <list of local aliases for imports> // <hoisted function declarations> // <hoisted variable declarations> // return { // setters: [ // <list of setter function for imports> // ], // execute: function() { // <module statements> // } // } // <temp declarations> // } // I.e: // import {x} from 'file1' // var y = 1; // export function foo() { return y + x(); } // console.log(y); // will be transformed to // function(exports) { // var file1; // local alias // var y; // function foo() { return y + file1.x(); } // exports("foo", foo); // return { // setters: [ // function(v) { file1 = v } // ], // execute(): function() { // y = 1; // console.log(y); // } // }; // } emitVariableDeclarationsForImports(); writeLine(); var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node); var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations); writeLine(); write("return {"); increaseIndent(); writeLine(); emitSetters(exportStarFunction, dependencyGroups); writeLine(); emitExecute(node, startIndex); decreaseIndent(); writeLine(); write("}"); // return emitTempDeclarations(/*newLine*/ true); } function emitSetters(exportStarFunction, dependencyGroups) { write("setters:["); for (var i = 0; i < dependencyGroups.length; i++) { if (i !== 0) { write(","); } writeLine(); increaseIndent(); var group = dependencyGroups[i]; // derive a unique name for parameter from the first named entry in the group var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || ""); write("function (" + parameterName + ") {"); increaseIndent(); for (var _a = 0, group_1 = group; _a < group_1.length; _a++) { var entry = group_1[_a]; var importVariableName = getLocalNameForExternalImport(entry) || ""; switch (entry.kind) { case 230 /* ImportDeclaration */: if (!entry.importClause) { // 'import "..."' case // module is imported only for side-effects, no emit required break; } // fall-through case 229 /* ImportEqualsDeclaration */: ts.Debug.assert(importVariableName !== ""); writeLine(); // save import into the local write(importVariableName + " = " + parameterName + ";"); writeLine(); break; case 236 /* ExportDeclaration */: ts.Debug.assert(importVariableName !== ""); if (entry.exportClause) { // export {a, b as c} from 'foo' // emit as: // exports_({ // "a": _["a"], // "c": _["b"] // }); writeLine(); write(exportFunctionForFile + "({"); writeLine(); increaseIndent(); for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) { if (i_1 !== 0) { write(","); writeLine(); } var e = entry.exportClause.elements[i_1]; write("\""); emitNodeWithCommentsAndWithoutSourcemap(e.name); write("\": " + parameterName + "[\""); emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name); write("\"]"); } decreaseIndent(); writeLine(); write("});"); } else { // collectExternalModuleInfo prefilters star exports to keep only ones that export values // this means that check 'resolver.moduleExportsSomeValue' is redundant and can be omitted here writeLine(); // export * from 'foo' // emit as: // exportStar(_foo); write(exportStarFunction + "(" + parameterName + ");"); } writeLine(); break; } } decreaseIndent(); write("}"); decreaseIndent(); } write("],"); } function emitExecute(node, startIndex) { write("execute: function() {"); increaseIndent(); writeLine(); for (var i = startIndex; i < node.statements.length; i++) { var statement = node.statements[i]; switch (statement.kind) { // - function declarations are not emitted because they were already hoisted // - import declarations are not emitted since they are already handled in setters // - export declarations with module specifiers are not emitted since they were already written in setters // - export declarations without module specifiers are emitted preserving the order case 220 /* FunctionDeclaration */: case 230 /* ImportDeclaration */: continue; case 236 /* ExportDeclaration */: if (!statement.moduleSpecifier) { for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) { var element = _b[_a]; // write call to exporter function for every export specifier in exports list emitExportSpecifierInSystemModule(element); } } continue; case 229 /* ImportEqualsDeclaration */: if (!ts.isInternalModuleImportEqualsDeclaration(statement)) { // - import equals declarations that import external modules are not emitted continue; } // fall-though for import declarations that import internal modules default: writeLine(); emit(statement); } } decreaseIndent(); writeLine(); write("}"); // execute } function writeModuleName(node, emitRelativePathAsModuleName) { var moduleName = node.moduleName; if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) { write("\"" + moduleName + "\", "); } } function emitSystemModule(node, emitRelativePathAsModuleName) { collectExternalModuleInfo(node); // System modules has the following shape // System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */}) // 'exports' here is a function 'exports<T>(name: string, value: T): T' that is used to publish exported values. // 'exports' returns its 'value' argument so in most cases expressions // that mutate exported values can be rewritten as: // expr -> exports('name', expr). // The only exception in this rule is postfix unary operators, // see comment to 'emitPostfixUnaryExpression' for more details ts.Debug.assert(!exportFunctionForFile); // make sure that name of 'exports' function does not conflict with existing identifiers exportFunctionForFile = makeUniqueName("exports"); contextObjectForFile = makeUniqueName("context"); writeLine(); write("System.register("); writeModuleName(node, emitRelativePathAsModuleName); write("["); var groupIndices = ts.createMap(); var dependencyGroups = []; for (var i = 0; i < externalImports.length; i++) { var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName); if (text === undefined) { continue; } // text should be quoted string // for deduplication purposes in key remove leading and trailing quotes so 'a' and "a" will be considered the same var key = text.substr(1, text.length - 2); if (key in groupIndices) { // deduplicate/group entries in dependency list by the dependency name var groupIndex = groupIndices[key]; dependencyGroups[groupIndex].push(externalImports[i]); continue; } else { groupIndices[key] = dependencyGroups.length; dependencyGroups.push([externalImports[i]]); } if (i !== 0) { write(", "); } write(text); } write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {"); writeLine(); increaseIndent(); var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict); writeLine(); write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;"); writeLine(); emitEmitHelpers(node); emitCaptureThisForNodeIfNecessary(node); emitSystemModuleBody(node, dependencyGroups, startIndex); decreaseIndent(); writeLine(); write("});"); } function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) { // names of modules with corresponding parameter in the factory function var aliasedModuleNames = []; // names of modules with no corresponding parameters in factory function var unaliasedModuleNames = []; var importAliasNames = []; // names of the parameters in the factory function; these // parameters need to match the indexes of the corresponding // module names in aliasedModuleNames. // Fill in amd-dependency tags for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) { var amdDependency = _b[_a]; if (amdDependency.name) { aliasedModuleNames.push('"' + amdDependency.path + '"'); importAliasNames.push(amdDependency.name); } else { unaliasedModuleNames.push('"' + amdDependency.path + '"'); } } for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) { var importNode = externalImports_4[_c]; // Find the name of the external module var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName); // Find the name of the module alias, if there is one var importAliasName = getLocalNameForExternalImport(importNode); if (includeNonAmdDependencies && importAliasName) { aliasedModuleNames.push(externalModuleName); importAliasNames.push(importAliasName); } else { unaliasedModuleNames.push(externalModuleName); } } return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames }; } function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) { // An AMD define function has the following shape: // define(id?, dependencies?, factory); // // This has the shape of // define(name, ["module1", "module2"], function (module1Alias) { // The location of the alias in the parameter list in the factory function needs to // match the position of the module name in the dependency list. // // To ensure this is true in cases of modules with no aliases, e.g.: // `import "module"` or `<amd-dependency path= "a.css" />` // we need to add modules without alias names to the end of the dependencies list var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName); emitAMDDependencyList(dependencyNames); write(", "); emitAMDFactoryHeader(dependencyNames); } function emitAMDDependencyList(_a) { var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames; write('["require", "exports"'); if (aliasedModuleNames.length) { write(", "); write(aliasedModuleNames.join(", ")); } if (unaliasedModuleNames.length) { write(", "); write(unaliasedModuleNames.join(", ")); } write("]"); } function emitAMDFactoryHeader(_a) { var importAliasNames = _a.importAliasNames; write("function (require, exports"); if (importAliasNames.length) { write(", "); write(importAliasNames.join(", ")); } write(") {"); } function emitAMDModule(node, emitRelativePathAsModuleName) { emitEmitHelpers(node); collectExternalModuleInfo(node); writeLine(); write("define("); writeModuleName(node, emitRelativePathAsModuleName); emitAMDDependencies(node, /*includeNonAmdDependencies*/ true, emitRelativePathAsModuleName); increaseIndent(); var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict); emitExportStarHelper(); emitCaptureThisForNodeIfNecessary(node); emitLinesStartingAt(node.statements, startIndex); emitExportEquals(/*emitAsReturn*/ true); emitTempDeclarations(/*newLine*/ true); decreaseIndent(); writeLine(); write("});"); } function emitCommonJSModule(node) { var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict); emitEmitHelpers(node); collectExternalModuleInfo(node); emitExportStarHelper(); emitCaptureThisForNodeIfNecessary(node); emitLinesStartingAt(node.statements, startIndex); emitExportEquals(/*emitAsReturn*/ false); emitTempDeclarations(/*newLine*/ true); } function emitUMDModule(node) { emitEmitHelpers(node); collectExternalModuleInfo(node); var dependencyNames = getAMDDependencyNames(node, /*includeNonAmdDependencies*/ false); // Module is detected first to support Browserify users that load into a browser with an AMD loader writeLines("(function (factory) {\n if (typeof module === 'object' && typeof module.exports === 'object') {\n var v = factory(require, exports); if (v !== undefined) module.exports = v;\n }\n else if (typeof define === 'function' && define.amd) {\n define("); emitAMDDependencyList(dependencyNames); write(", factory);"); writeLines(" }\n})("); emitAMDFactoryHeader(dependencyNames); increaseIndent(); var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict); emitExportStarHelper(); emitCaptureThisForNodeIfNecessary(node); emitLinesStartingAt(node.statements, startIndex); emitExportEquals(/*emitAsReturn*/ true); emitTempDeclarations(/*newLine*/ true); decreaseIndent(); writeLine(); write("});"); } function emitES6Module(node) { externalImports = undefined; exportSpecifiers = undefined; exportEquals = undefined; hasExportStarsToExportValues = false; var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false); emitEmitHelpers(node); emitCaptureThisForNodeIfNecessary(node); emitLinesStartingAt(node.statements, startIndex); emitTempDeclarations(/*newLine*/ true); // Emit exportDefault if it exists will happen as part // or normal statement emit. } function emitExportEquals(emitAsReturn) { if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) { writeLine(); emitStart(exportEquals); write(emitAsReturn ? "return " : "module.exports = "); emit(exportEquals.expression); write(";"); emitEnd(exportEquals); } } function emitJsxElement(node) { switch (compilerOptions.jsx) { case 2 /* React */: jsxEmitReact(node); break; case 1 /* Preserve */: // Fall back to preserve if None was specified (we'll error earlier) default: jsxEmitPreserve(node); break; } } function trimReactWhitespaceAndApplyEntities(node) { var result = undefined; var text = ts.getTextOfNode(node, /*includeTrivia*/ true); var firstNonWhitespace = 0; var lastNonWhitespace = -1; // JSX trims whitespace at the end and beginning of lines, except that the // start/end of a tag is considered a start/end of a line only if that line is // on the same line as the closing tag. See examples in tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx for (var i = 0; i < text.length; i++) { var c = text.charCodeAt(i); if (ts.isLineBreak(c)) { if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) { var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1); result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part); } firstNonWhitespace = -1; } else if (!ts.isWhiteSpaceSingleLine(c)) { lastNonWhitespace = i; if (firstNonWhitespace === -1) { firstNonWhitespace = i; } } } if (firstNonWhitespace !== -1) { var part = text.substr(firstNonWhitespace); result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part); } if (result) { // Replace entities like &nbsp; result = result.replace(/&(\w+);/g, function (s, m) { if (entities[m] !== undefined) { var ch = String.fromCharCode(entities[m]); // &quot; needs to be escaped return ch === '"' ? "\\\"" : ch; } else { return s; } }); } return result; } function isJsxChildEmittable(child) { if (child.kind === 248 /* JsxExpression */) { // Don't emit empty expressions return !!child.expression; } else if (child.kind === 244 /* JsxText */) { // Don't emit empty strings return !!getTextToEmit(child); } return true; } ; function getTextToEmit(node) { switch (compilerOptions.jsx) { case 2 /* React */: var text = trimReactWhitespaceAndApplyEntities(node); if (text === undefined || text.length === 0) { return undefined; } else { return text; } case 1 /* Preserve */: default: return ts.getTextOfNode(node, /*includeTrivia*/ true); } } function emitJsxText(node) { switch (compilerOptions.jsx) { case 2 /* React */: write('"'); write(trimReactWhitespaceAndApplyEntities(node)); write('"'); break; case 1 /* Preserve */: default: writer.writeLiteral(ts.getTextOfNode(node, /*includeTrivia*/ true)); break; } } function emitJsxExpression(node) { if (node.expression) { switch (compilerOptions.jsx) { case 1 /* Preserve */: default: write("{"); emit(node.expression); write("}"); break; case 2 /* React */: emit(node.expression); break; } } } function isUseStrictPrologue(node) { return node.expression.text === "use strict"; } function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) { if (writeUseStrict) { if (startWithNewLine) { writeLine(); } write("\"use strict\";"); } } function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) { var foundUseStrict = false; for (var i = 0; i < statements.length; i++) { if (ts.isPrologueDirective(statements[i])) { if (isUseStrictPrologue(statements[i])) { foundUseStrict = true; } if (startWithNewLine || i > 0) { writeLine(); } emit(statements[i]); } else { ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict); // return index of the first non prologue directive return i; } } ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict); return statements.length; } function writeLines(text) { var lines = text.split(/\r\n|\r|\n/g); for (var i = 0; i < lines.length; i++) { var line = lines[i]; if (line.length) { writeLine(); write(line); } } } function emitEmitHelpers(node) { // Only emit helpers if the user did not say otherwise. if (!compilerOptions.noEmitHelpers) { // Only Emit __extends function when target ES5. // For target ES6 and above, we can emit classDeclaration as is. if (languageVersion < 2 /* ES6 */ && !extendsEmitted && node.flags & 262144 /* HasClassExtends */) { writeLines(extendsHelper); extendsEmitted = true; } if (compilerOptions.jsx !== 1 /* Preserve */ && !assignEmitted && (node.flags & 1073741824 /* HasJsxSpreadAttribute */)) { writeLines(assignHelper); assignEmitted = true; } if (!decorateEmitted && node.flags & 524288 /* HasDecorators */) { writeLines(decorateHelper); if (compilerOptions.emitDecoratorMetadata) { writeLines(metadataHelper); } decorateEmitted = true; } if (!paramEmitted && node.flags & 1048576 /* HasParamDecorators */) { writeLines(paramHelper); paramEmitted = true; } if (!awaiterEmitted && node.flags & 2097152 /* HasAsyncFunctions */) { writeLines(awaiterHelper); awaiterEmitted = true; } } } function emitSourceFileNode(node) { // Start new file on new line writeLine(); emitShebang(); emitDetachedCommentsAndUpdateCommentsInfo(node); if (ts.isExternalModule(node) || compilerOptions.isolatedModules) { if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) { var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS]; emitModule(node); } else { bundleEmitDelegates[modulekind](node, /*emitRelativePathAsModuleName*/ true); } } else { // emit prologue directives prior to __extends var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false); externalImports = undefined; exportSpecifiers = undefined; exportEquals = undefined; hasExportStarsToExportValues = false; emitEmitHelpers(node); emitCaptureThisForNodeIfNecessary(node); emitLinesStartingAt(node.statements, startIndex); emitTempDeclarations(/*newLine*/ true); } emitLeadingComments(node.endOfFileToken); } function emit(node) { emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap); } function emitNodeWithCommentsAndWithoutSourcemap(node) { emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap); } function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) { if (node) { if (node.flags & 2 /* Ambient */) { return emitCommentsOnNotEmittedNode(node); } if (isSpecializedCommentHandling(node)) { // This is the node that will handle its own comments and sourcemap return emitNodeWithoutSourceMap(node); } var emitComments_1 = shouldEmitLeadingAndTrailingComments(node); if (emitComments_1) { emitLeadingComments(node); } emitNodeConsideringSourcemap(node); if (emitComments_1) { emitTrailingComments(node); } } } function emitNodeWithSourceMap(node) { if (node) { emitStart(node); emitNodeWithoutSourceMap(node); emitEnd(node); } } function emitNodeWithoutSourceMap(node) { if (node) { emitJavaScriptWorker(node); } } function changeSourceMapEmit(writer) { sourceMap = writer; emitStart = writer.emitStart; emitEnd = writer.emitEnd; emitPos = writer.emitPos; setSourceFile = writer.setSourceFile; } function withTemporaryNoSourceMap(callback) { var prevSourceMap = sourceMap; setSourceMapWriterEmit(ts.getNullSourceMapWriter()); callback(); setSourceMapWriterEmit(prevSourceMap); } function isSpecializedCommentHandling(node) { switch (node.kind) { // All of these entities are emitted in a specialized fashion. As such, we allow // the specialized methods for each to handle the comments on the nodes. case 222 /* InterfaceDeclaration */: case 220 /* FunctionDeclaration */: case 230 /* ImportDeclaration */: case 229 /* ImportEqualsDeclaration */: case 223 /* TypeAliasDeclaration */: case 235 /* ExportAssignment */: return true; } } function shouldEmitLeadingAndTrailingComments(node) { switch (node.kind) { case 200 /* VariableStatement */: return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node); case 225 /* ModuleDeclaration */: // Only emit the leading/trailing comments for a module if we're actually // emitting the module as well. return shouldEmitModuleDeclaration(node); case 224 /* EnumDeclaration */: // Only emit the leading/trailing comments for an enum if we're actually // emitting the module as well. return shouldEmitEnumDeclaration(node); } // If the node is emitted in specialized fashion, dont emit comments as this node will handle // emitting comments when emitting itself ts.Debug.assert(!isSpecializedCommentHandling(node)); // If this is the expression body of an arrow function that we're down-leveling, // then we don't want to emit comments when we emit the body. It will have already // been taken care of when we emitted the 'return' statement for the function // expression body. if (node.kind !== 199 /* Block */ && node.parent && node.parent.kind === 180 /* ArrowFunction */ && node.parent.body === node && languageVersion <= 1 /* ES5 */) { return false; } // Emit comments for everything else. return true; } function emitJavaScriptWorker(node) { // Check if the node can be emitted regardless of the ScriptTarget switch (node.kind) { case 69 /* Identifier */: return emitIdentifier(node); case 142 /* Parameter */: return emitParameter(node); case 147 /* MethodDeclaration */: case 146 /* MethodSignature */: return emitMethod(node); case 149 /* GetAccessor */: case 150 /* SetAccessor */: return emitAccessor(node); case 97 /* ThisKeyword */: return emitThis(node); case 95 /* SuperKeyword */: return emitSuper(node); case 93 /* NullKeyword */: return write("null"); case 99 /* TrueKeyword */: return write("true"); case 84 /* FalseKeyword */: return write("false"); case 8 /* NumericLiteral */: case 9 /* StringLiteral */: case 10 /* RegularExpressionLiteral */: case 11 /* NoSubstitutionTemplateLiteral */: case 12 /* TemplateHead */: case 13 /* TemplateMiddle */: case 14 /* TemplateTail */: return emitLiteral(node); case 189 /* TemplateExpression */: return emitTemplateExpression(node); case 197 /* TemplateSpan */: return emitTemplateSpan(node); case 241 /* JsxElement */: case 242 /* JsxSelfClosingElement */: return emitJsxElement(node); case 244 /* JsxText */: return emitJsxText(node); case 248 /* JsxExpression */: return emitJsxExpression(node); case 139 /* QualifiedName */: return emitQualifiedName(node); case 167 /* ObjectBindingPattern */: return emitObjectBindingPattern(node); case 168 /* ArrayBindingPattern */: return emitArrayBindingPattern(node); case 169 /* BindingElement */: return emitBindingElement(node); case 170 /* ArrayLiteralExpression */: return emitArrayLiteral(node); case 171 /* ObjectLiteralExpression */: return emitObjectLiteral(node); case 253 /* PropertyAssignment */: return emitPropertyAssignment(node); case 254 /* ShorthandPropertyAssignment */: return emitShorthandPropertyAssignment(node); case 140 /* ComputedPropertyName */: return emitComputedPropertyName(node); case 172 /* PropertyAccessExpression */: return emitPropertyAccess(node); case 173 /* ElementAccessExpression */: return emitIndexedAccess(node); case 174 /* CallExpression */: return emitCallExpression(node); case 175 /* NewExpression */: return emitNewExpression(node); case 176 /* TaggedTemplateExpression */: return emitTaggedTemplateExpression(node); case 177 /* TypeAssertionExpression */: case 195 /* AsExpression */: case 196 /* NonNullExpression */: return emit(node.expression); case 178 /* ParenthesizedExpression */: return emitParenExpression(node); case 220 /* FunctionDeclaration */: case 179 /* FunctionExpression */: case 180 /* ArrowFunction */: return emitFunctionDeclaration(node); case 181 /* DeleteExpression */: return emitDeleteExpression(node); case 182 /* TypeOfExpression */: return emitTypeOfExpression(node); case 183 /* VoidExpression */: return emitVoidExpression(node); case 184 /* AwaitExpression */: return emitAwaitExpression(node); case 185 /* PrefixUnaryExpression */: return emitPrefixUnaryExpression(node); case 186 /* PostfixUnaryExpression */: return emitPostfixUnaryExpression(node); case 187 /* BinaryExpression */: return emitBinaryExpression(node); case 188 /* ConditionalExpression */: return emitConditionalExpression(node); case 191 /* SpreadElementExpression */: return emitSpreadElementExpression(node); case 190 /* YieldExpression */: return emitYieldExpression(node); case 193 /* OmittedExpression */: return; case 199 /* Block */: case 226 /* ModuleBlock */: return emitBlock(node); case 200 /* VariableStatement */: return emitVariableStatement(node); case 201 /* EmptyStatement */: return write(";"); case 202 /* ExpressionStatement */: return emitExpressionStatement(node); case 203 /* IfStatement */: return emitIfStatement(node); case 204 /* DoStatement */: return emitDoStatement(node); case 205 /* WhileStatement */: return emitWhileStatement(node); case 206 /* ForStatement */: return emitForStatement(node); case 208 /* ForOfStatement */: case 207 /* ForInStatement */: return emitForInOrForOfStatement(node); case 209 /* ContinueStatement */: case 210 /* BreakStatement */: return emitBreakOrContinueStatement(node); case 211 /* ReturnStatement */: return emitReturnStatement(node); case 212 /* WithStatement */: return emitWithStatement(node); case 213 /* SwitchStatement */: return emitSwitchStatement(node); case 249 /* CaseClause */: case 250 /* DefaultClause */: return emitCaseOrDefaultClause(node); case 214 /* LabeledStatement */: return emitLabeledStatement(node); case 215 /* ThrowStatement */: return emitThrowStatement(node); case 216 /* TryStatement */: return emitTryStatement(node); case 252 /* CatchClause */: return emitCatchClause(node); case 217 /* DebuggerStatement */: return emitDebuggerStatement(node); case 218 /* VariableDeclaration */: return emitVariableDeclaration(node); case 192 /* ClassExpression */: return emitClassExpression(node); case 221 /* ClassDeclaration */: return emitClassDeclaration(node); case 222 /* InterfaceDeclaration */: return emitInterfaceDeclaration(node); case 224 /* EnumDeclaration */: return emitEnumDeclaration(node); case 255 /* EnumMember */: return emitEnumMember(node); case 225 /* ModuleDeclaration */: return emitModuleDeclaration(node); case 230 /* ImportDeclaration */: return emitImportDeclaration(node); case 229 /* ImportEqualsDeclaration */: return emitImportEqualsDeclaration(node); case 236 /* ExportDeclaration */: return emitExportDeclaration(node); case 235 /* ExportAssignment */: return emitExportAssignment(node); case 256 /* SourceFile */: return emitSourceFileNode(node); } } function hasDetachedComments(pos) { return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos; } function getLeadingCommentsWithoutDetachedComments() { // get the leading comments from detachedPos var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos); if (detachedCommentsInfo.length - 1) { detachedCommentsInfo.pop(); } else { detachedCommentsInfo = undefined; } return leadingComments; } /** * Determine if the given comment is a triple-slash * * @return true if the comment is a triple-slash comment else false **/ function isTripleSlashComment(comment) { // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text // so that we don't end up computing comment string and doing match for all // comments if (currentText.charCodeAt(comment.pos + 1) === 47 /* slash */ && comment.pos + 2 < comment.end && currentText.charCodeAt(comment.pos + 2) === 47 /* slash */) { var textSubStr = currentText.substring(comment.pos, comment.end); return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) || textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ? true : false; } return false; } function getLeadingCommentsToEmit(node) { // Emit the leading comments only if the parent's pos doesn't match because parent should take care of emitting these comments if (node.parent) { if (node.parent.kind === 256 /* SourceFile */ || node.pos !== node.parent.pos) { if (hasDetachedComments(node.pos)) { // get comments without detached comments return getLeadingCommentsWithoutDetachedComments(); } else { // get the leading comments from the node return ts.getLeadingCommentRangesOfNodeFromText(node, currentText); } } } } function getTrailingCommentsToEmit(node) { // Emit the trailing comments only if the parent's pos doesn't match because parent should take care of emitting these comments if (node.parent) { if (node.parent.kind === 256 /* SourceFile */ || node.end !== node.parent.end) { return ts.getTrailingCommentRanges(currentText, node.end); } } } /** * Emit comments associated with node that will not be emitted into JS file */ function emitCommentsOnNotEmittedNode(node) { emitLeadingCommentsWorker(node, /*isEmittedNode*/ false); } function emitLeadingComments(node) { return emitLeadingCommentsWorker(node, /*isEmittedNode*/ true); } function emitLeadingCommentsWorker(node, isEmittedNode) { if (compilerOptions.removeComments) { return; } var leadingComments; if (isEmittedNode) { leadingComments = getLeadingCommentsToEmit(node); } else { // If the node will not be emitted in JS, remove all the comments(normal, pinned and ///) associated with the node, // unless it is a triple slash comment at the top of the file. // For Example: // /// <reference-path ...> // declare var x; // /// <reference-path ...> // interface F {} // The first /// will NOT be removed while the second one will be removed even though both node will not be emitted if (node.pos === 0) { leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment); } } ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments); // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment); } function emitTrailingComments(node) { if (compilerOptions.removeComments) { return; } // Emit the trailing comments only if the parent's end doesn't match var trailingComments = getTrailingCommentsToEmit(node); // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/ ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ false, newLine, writeComment); } /** * Emit trailing comments at the position. The term trailing comment is used here to describe following comment: * x, /comment1/ y * ^ => pos; the function will emit "comment1" in the emitJS */ function emitTrailingCommentsOfPosition(pos) { if (compilerOptions.removeComments) { return; } var trailingComments = ts.getTrailingCommentRanges(currentText, pos); // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/ ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ true, newLine, writeComment); } function emitLeadingCommentsOfPositionWorker(pos) { if (compilerOptions.removeComments) { return; } var leadingComments; if (hasDetachedComments(pos)) { // get comments without detached comments leadingComments = getLeadingCommentsWithoutDetachedComments(); } else { // get the leading comments from the node leadingComments = ts.getLeadingCommentRanges(currentText, pos); } ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments); // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment); } function emitDetachedCommentsAndUpdateCommentsInfo(node) { var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments); if (currentDetachedCommentInfo) { if (detachedCommentsInfo) { detachedCommentsInfo.push(currentDetachedCommentInfo); } else { detachedCommentsInfo = [currentDetachedCommentInfo]; } } } function writeComment(text, lineMap, writer, comment, newLine) { emitPos(comment.pos); ts.writeCommentRange(text, lineMap, writer, comment, newLine); emitPos(comment.end); } function emitShebang() { var shebang = ts.getShebang(currentText); if (shebang) { write(shebang); writeLine(); } } var _a, _b; } function emitFile(_a, sourceFiles, isBundledEmit, emitOnlyDtsFiles) { var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath; if (!emitOnlyDtsFiles) { // Make sure not to write js File and source map file if any of them cannot be written if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) { emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit); } else { emitSkipped = true; } } if (declarationFilePath) { emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics, emitOnlyDtsFiles) || emitSkipped; } if (!emitSkipped && emittedFilesList) { if (!emitOnlyDtsFiles) { emittedFilesList.push(jsFilePath); if (sourceMapFilePath) { emittedFilesList.push(sourceMapFilePath); } } if (declarationFilePath) { emittedFilesList.push(declarationFilePath); } } } }
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targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L37566-L44681
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
makeTempVariableName
function makeTempVariableName(flags) { if (flags && !(tempFlags & flags)) { var name_24 = flags === 268435456 /* _i */ ? "_i" : "_n"; if (isUniqueName(name_24)) { tempFlags |= flags; return name_24; } } while (true) { var count = tempFlags & 268435455 /* CountMask */; tempFlags++; // Skip over 'i' and 'n' if (count !== 8 && count !== 13) { var name_25 = count < 26 ? "_" + String.fromCharCode(97 /* a */ + count) : "_" + (count - 26); if (isUniqueName(name_25)) { return name_25; } } } }
javascript
function makeTempVariableName(flags) { if (flags && !(tempFlags & flags)) { var name_24 = flags === 268435456 /* _i */ ? "_i" : "_n"; if (isUniqueName(name_24)) { tempFlags |= flags; return name_24; } } while (true) { var count = tempFlags & 268435455 /* CountMask */; tempFlags++; // Skip over 'i' and 'n' if (count !== 8 && count !== 13) { var name_25 = count < 26 ? "_" + String.fromCharCode(97 /* a */ + count) : "_" + (count - 26); if (isUniqueName(name_25)) { return name_25; } } } }
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Return the next available name in the pattern _a ... _z, _0, _1, ... TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name. Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L37767-L37786
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
writeEmittedFiles
function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) { if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) { ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles); } if (sourceMapDataList) { sourceMapDataList.push(sourceMap.getSourceMapData()); } ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles); }
javascript
function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) { if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) { ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles); } if (sourceMapDataList) { sourceMapDataList.push(sourceMap.getSourceMapData()); } ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles); }
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Write emitted output to disk
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L37847-L37855
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
emitToken
function emitToken(tokenKind, startPos, emitFn) { var tokenStartPos = ts.skipTrivia(currentText, startPos); emitPos(tokenStartPos); var tokenString = ts.tokenToString(tokenKind); if (emitFn) { emitFn(); } else { write(tokenString); } var tokenEndPos = tokenStartPos + tokenString.length; emitPos(tokenEndPos); return tokenEndPos; }
javascript
function emitToken(tokenKind, startPos, emitFn) { var tokenStartPos = ts.skipTrivia(currentText, startPos); emitPos(tokenStartPos); var tokenString = ts.tokenToString(tokenKind); if (emitFn) { emitFn(); } else { write(tokenString); } var tokenEndPos = tokenStartPos + tokenString.length; emitPos(tokenEndPos); return tokenEndPos; }
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Emit the text for the given token that comes after startPos This by default writes the text provided with the given tokenKind but if optional emitFn callback is provided the text is emitted using the callback instead of default text @param tokenKind the kind of the token to search and emit @param startPos the position in the source to start searching for the token @param emitFn if given will be invoked to emit the text instead of actual token emit
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L37892-L37905
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isImportedReference
function isImportedReference(node) { var declaration = resolver.getReferencedImportDeclaration(node); return declaration && (declaration.kind === 231 /* ImportClause */ || declaration.kind === 234 /* ImportSpecifier */); }
javascript
function isImportedReference(node) { var declaration = resolver.getReferencedImportDeclaration(node); return declaration && (declaration.kind === 231 /* ImportClause */ || declaration.kind === 234 /* ImportSpecifier */); }
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Return true if identifier resolves to an imported identifier
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L39111-L39114
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
tryEmitStartOfVariableDeclarationList
function tryEmitStartOfVariableDeclarationList(decl) { if (shouldHoistVariable(decl, /*checkIfSourceFileLevelDecl*/ true)) { // variables in variable declaration list were already hoisted return false; } if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072 /* BlockScoped */) === 0) { // we are inside a converted loop - this can only happen in downlevel scenarios // record names for all variable declarations for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) { var varDecl = _b[_a]; hoistVariableDeclarationFromLoop(convertedLoopState, varDecl); } return false; } emitStart(decl); if (decl && languageVersion >= 2 /* ES6 */) { if (ts.isLet(decl)) { write("let "); } else if (ts.isConst(decl)) { write("const "); } else { write("var "); } } else { write("var "); } // Note here we specifically dont emit end so that if we are going to emit binding pattern // we can alter the source map correctly return true; }
javascript
function tryEmitStartOfVariableDeclarationList(decl) { if (shouldHoistVariable(decl, /*checkIfSourceFileLevelDecl*/ true)) { // variables in variable declaration list were already hoisted return false; } if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072 /* BlockScoped */) === 0) { // we are inside a converted loop - this can only happen in downlevel scenarios // record names for all variable declarations for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) { var varDecl = _b[_a]; hoistVariableDeclarationFromLoop(convertedLoopState, varDecl); } return false; } emitStart(decl); if (decl && languageVersion >= 2 /* ES6 */) { if (ts.isLet(decl)) { write("let "); } else if (ts.isConst(decl)) { write("const "); } else { write("var "); } } else { write("var "); } // Note here we specifically dont emit end so that if we are going to emit binding pattern // we can alter the source map correctly return true; }
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Returns true if start of variable declaration list was emitted. Returns false if nothing was written - this can happen for source file level variable declarations in system modules where such variable declarations are hoisted.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L39887-L39919
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
emitAssignment
function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) { if (shouldEmitCommaBeforeAssignment) { write(", "); } var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name); if (exportChanged) { write(exportFunctionForFile + "(\""); emitNodeWithCommentsAndWithoutSourcemap(name); write("\", "); } var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 /* VariableDeclaration */ || name.parent.kind === 169 /* BindingElement */); // If this is first var declaration, we need to start at var/let/const keyword instead // otherwise use nodeForSourceMap as the start position emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap); withTemporaryNoSourceMap(function () { if (isVariableDeclarationOrBindingElement) { emitModuleMemberName(name.parent); } else { emit(name); } write(" = "); emit(value); }); emitEnd(nodeForSourceMap, /*stopOverridingSpan*/ true); if (exportChanged) { write(")"); } }
javascript
function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) { if (shouldEmitCommaBeforeAssignment) { write(", "); } var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name); if (exportChanged) { write(exportFunctionForFile + "(\""); emitNodeWithCommentsAndWithoutSourcemap(name); write("\", "); } var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 /* VariableDeclaration */ || name.parent.kind === 169 /* BindingElement */); // If this is first var declaration, we need to start at var/let/const keyword instead // otherwise use nodeForSourceMap as the start position emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap); withTemporaryNoSourceMap(function () { if (isVariableDeclarationOrBindingElement) { emitModuleMemberName(name.parent); } else { emit(name); } write(" = "); emit(value); }); emitEnd(nodeForSourceMap, /*stopOverridingSpan*/ true); if (exportChanged) { write(")"); } }
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Emit an assignment to a given identifier, 'name', with a given expression, 'value'. @param name an identifier as a left-hand-side operand of the assignment @param value an expression as a right-hand-side operand of the assignment @param shouldEmitCommaBeforeAssignment a boolean indicating whether to prefix an assignment with comma
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L40741-L40769
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getSuperCallAtGivenIndex
function getSuperCallAtGivenIndex(ctor, index) { if (!ctor.body) { return undefined; } var statements = ctor.body.statements; if (!statements || index >= statements.length) { return undefined; } var statement = statements[index]; if (statement.kind === 202 /* ExpressionStatement */) { return ts.isSuperCallExpression(statement.expression) ? statement : undefined; } }
javascript
function getSuperCallAtGivenIndex(ctor, index) { if (!ctor.body) { return undefined; } var statements = ctor.body.statements; if (!statements || index >= statements.length) { return undefined; } var statement = statements[index]; if (statement.kind === 202 /* ExpressionStatement */) { return ts.isSuperCallExpression(statement.expression) ? statement : undefined; } }
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Return the statement at a given index if it is a super-call statement @param ctor a constructor declaration @param index an index to constructor's body to check
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L41661-L41673
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isTripleSlashComment
function isTripleSlashComment(comment) { // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text // so that we don't end up computing comment string and doing match for all // comments if (currentText.charCodeAt(comment.pos + 1) === 47 /* slash */ && comment.pos + 2 < comment.end && currentText.charCodeAt(comment.pos + 2) === 47 /* slash */) { var textSubStr = currentText.substring(comment.pos, comment.end); return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) || textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ? true : false; } return false; }
javascript
function isTripleSlashComment(comment) { // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text // so that we don't end up computing comment string and doing match for all // comments if (currentText.charCodeAt(comment.pos + 1) === 47 /* slash */ && comment.pos + 2 < comment.end && currentText.charCodeAt(comment.pos + 2) === 47 /* slash */) { var textSubStr = currentText.substring(comment.pos, comment.end); return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) || textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ? true : false; } return false; }
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Determine if the given comment is a triple-slash @return true if the comment is a triple-slash comment else false
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L44521-L44533
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getAutomaticTypeDirectiveNames
function getAutomaticTypeDirectiveNames(options, host) { // Use explicit type list from tsconfig.json if (options.types) { return options.types; } // Walk the primary type lookup locations var result = []; if (host.directoryExists && host.getDirectories) { var typeRoots = getEffectiveTypeRoots(options, host); if (typeRoots) { for (var _i = 0, typeRoots_1 = typeRoots; _i < typeRoots_1.length; _i++) { var root = typeRoots_1[_i]; if (host.directoryExists(root)) { for (var _a = 0, _b = host.getDirectories(root); _a < _b.length; _a++) { var typeDirectivePath = _b[_a]; var normalized = ts.normalizePath(typeDirectivePath); var packageJsonPath = ts.pathToPackageJson(ts.combinePaths(root, normalized)); // tslint:disable-next-line:no-null-keyword var isNotNeededPackage = host.fileExists(packageJsonPath) && ts.readJson(packageJsonPath, host).typings === null; if (!isNotNeededPackage) { // Return just the type directive names result.push(ts.getBaseFileName(normalized)); } } } } } } return result; }
javascript
function getAutomaticTypeDirectiveNames(options, host) { // Use explicit type list from tsconfig.json if (options.types) { return options.types; } // Walk the primary type lookup locations var result = []; if (host.directoryExists && host.getDirectories) { var typeRoots = getEffectiveTypeRoots(options, host); if (typeRoots) { for (var _i = 0, typeRoots_1 = typeRoots; _i < typeRoots_1.length; _i++) { var root = typeRoots_1[_i]; if (host.directoryExists(root)) { for (var _a = 0, _b = host.getDirectories(root); _a < _b.length; _a++) { var typeDirectivePath = _b[_a]; var normalized = ts.normalizePath(typeDirectivePath); var packageJsonPath = ts.pathToPackageJson(ts.combinePaths(root, normalized)); // tslint:disable-next-line:no-null-keyword var isNotNeededPackage = host.fileExists(packageJsonPath) && ts.readJson(packageJsonPath, host).typings === null; if (!isNotNeededPackage) { // Return just the type directive names result.push(ts.getBaseFileName(normalized)); } } } } } } return result; }
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Given a set of options, returns the set of type directive names that should be included for this program automatically. This list could either come from the config file, or from enumerating the types root + initial secondary types lookup location. More type directives might appear in the program later as a result of loading actual source files; this list is only the set of defaults that are implicitly included.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L45064-L45093
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
findSourceFile
function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) { if (filesByName.contains(path)) { var file_1 = filesByName.get(path); // try to check if we've already seen this file but with a different casing in path // NOTE: this only makes sense for case-insensitive file systems if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) { reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd); } // If the file was previously found via a node_modules search, but is now being processed as a root file, // then everything it sucks in may also be marked incorrectly, and needs to be checked again. if (file_1 && sourceFilesFoundSearchingNodeModules[file_1.path] && currentNodeModulesDepth == 0) { sourceFilesFoundSearchingNodeModules[file_1.path] = false; if (!options.noResolve) { processReferencedFiles(file_1, ts.getDirectoryPath(fileName), isDefaultLib); processTypeReferenceDirectives(file_1); } modulesWithElidedImports[file_1.path] = false; processImportedModules(file_1, ts.getDirectoryPath(fileName)); } else if (file_1 && modulesWithElidedImports[file_1.path]) { if (currentNodeModulesDepth < maxNodeModulesJsDepth) { modulesWithElidedImports[file_1.path] = false; processImportedModules(file_1, ts.getDirectoryPath(fileName)); } } return file_1; } // We haven't looked for this file, do so now and cache result var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) { if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) { fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage)); } else { fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage)); } }); filesByName.set(path, file); if (file) { sourceFilesFoundSearchingNodeModules[path] = (currentNodeModulesDepth > 0); file.path = path; if (host.useCaseSensitiveFileNames()) { // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case var existingFile = filesByNameIgnoreCase.get(path); if (existingFile) { reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd); } else { filesByNameIgnoreCase.set(path, file); } } skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib; var basePath = ts.getDirectoryPath(fileName); if (!options.noResolve) { processReferencedFiles(file, basePath, isDefaultLib); processTypeReferenceDirectives(file); } // always process imported modules to record module name resolutions processImportedModules(file, basePath); if (isDefaultLib) { files.unshift(file); } else { files.push(file); } } return file; }
javascript
function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) { if (filesByName.contains(path)) { var file_1 = filesByName.get(path); // try to check if we've already seen this file but with a different casing in path // NOTE: this only makes sense for case-insensitive file systems if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) { reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd); } // If the file was previously found via a node_modules search, but is now being processed as a root file, // then everything it sucks in may also be marked incorrectly, and needs to be checked again. if (file_1 && sourceFilesFoundSearchingNodeModules[file_1.path] && currentNodeModulesDepth == 0) { sourceFilesFoundSearchingNodeModules[file_1.path] = false; if (!options.noResolve) { processReferencedFiles(file_1, ts.getDirectoryPath(fileName), isDefaultLib); processTypeReferenceDirectives(file_1); } modulesWithElidedImports[file_1.path] = false; processImportedModules(file_1, ts.getDirectoryPath(fileName)); } else if (file_1 && modulesWithElidedImports[file_1.path]) { if (currentNodeModulesDepth < maxNodeModulesJsDepth) { modulesWithElidedImports[file_1.path] = false; processImportedModules(file_1, ts.getDirectoryPath(fileName)); } } return file_1; } // We haven't looked for this file, do so now and cache result var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) { if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) { fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage)); } else { fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage)); } }); filesByName.set(path, file); if (file) { sourceFilesFoundSearchingNodeModules[path] = (currentNodeModulesDepth > 0); file.path = path; if (host.useCaseSensitiveFileNames()) { // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case var existingFile = filesByNameIgnoreCase.get(path); if (existingFile) { reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd); } else { filesByNameIgnoreCase.set(path, file); } } skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib; var basePath = ts.getDirectoryPath(fileName); if (!options.noResolve) { processReferencedFiles(file, basePath, isDefaultLib); processTypeReferenceDirectives(file); } // always process imported modules to record module name resolutions processImportedModules(file, basePath); if (isDefaultLib) { files.unshift(file); } else { files.push(file); } } return file; }
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Get source file from normalized fileName
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L45823-L45889
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
verifyEmitFilePath
function verifyEmitFilePath(emitFileName, emitFilesSeen) { if (emitFileName) { var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName); // Report error if the output overwrites input file if (filesByName.contains(emitFilePath)) { createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file); } // Report error if multiple files write into same file if (emitFilesSeen.contains(emitFilePath)) { // Already seen the same emit file - report error createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files); } else { emitFilesSeen.set(emitFilePath, true); } } }
javascript
function verifyEmitFilePath(emitFileName, emitFilesSeen) { if (emitFileName) { var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName); // Report error if the output overwrites input file if (filesByName.contains(emitFilePath)) { createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file); } // Report error if multiple files write into same file if (emitFilesSeen.contains(emitFilePath)) { // Already seen the same emit file - report error createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files); } else { emitFilesSeen.set(emitFilePath, true); } } }
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Verify that all the emit files are unique and don't overwrite input files
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L46169-L46185
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
parseConfigFileTextToJson
function parseConfigFileTextToJson(fileName, jsonText, stripComments) { if (stripComments === void 0) { stripComments = true; } try { var jsonTextToParse = stripComments ? removeComments(jsonText) : jsonText; return { config: /\S/.test(jsonTextToParse) ? JSON.parse(jsonTextToParse) : {} }; } catch (e) { return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) }; } }
javascript
function parseConfigFileTextToJson(fileName, jsonText, stripComments) { if (stripComments === void 0) { stripComments = true; } try { var jsonTextToParse = stripComments ? removeComments(jsonText) : jsonText; return { config: /\S/.test(jsonTextToParse) ? JSON.parse(jsonTextToParse) : {} }; } catch (e) { return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) }; } }
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Parse the text of the tsconfig.json file @param fileName The path to the config file @param jsonText The text of the config file
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L46852-L46861
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
matchFileNames
function matchFileNames(fileNames, include, exclude, basePath, options, host, errors) { basePath = ts.normalizePath(basePath); // The exclude spec list is converted into a regular expression, which allows us to quickly // test whether a file or directory should be excluded before recursively traversing the // file system. var keyMapper = host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper; // Literal file names (provided via the "files" array in tsconfig.json) are stored in a // file map with a possibly case insensitive key. We use this map later when when including // wildcard paths. var literalFileMap = ts.createMap(); // Wildcard paths (provided via the "includes" array in tsconfig.json) are stored in a // file map with a possibly case insensitive key. We use this map to store paths matched // via wildcard, and to handle extension priority. var wildcardFileMap = ts.createMap(); if (include) { include = validateSpecs(include, errors, /*allowTrailingRecursion*/ false); } if (exclude) { exclude = validateSpecs(exclude, errors, /*allowTrailingRecursion*/ true); } // Wildcard directories (provided as part of a wildcard path) are stored in a // file map that marks whether it was a regular wildcard match (with a `*` or `?` token), // or a recursive directory. This information is used by filesystem watchers to monitor for // new entries in these paths. var wildcardDirectories = getWildcardDirectories(include, exclude, basePath, host.useCaseSensitiveFileNames); // Rather than requery this for each file and filespec, we query the supported extensions // once and store it on the expansion context. var supportedExtensions = ts.getSupportedExtensions(options); // Literal files are always included verbatim. An "include" or "exclude" specification cannot // remove a literal file. if (fileNames) { for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) { var fileName = fileNames_1[_i]; var file = ts.combinePaths(basePath, fileName); literalFileMap[keyMapper(file)] = file; } } if (include && include.length > 0) { for (var _a = 0, _b = host.readDirectory(basePath, supportedExtensions, exclude, include); _a < _b.length; _a++) { var file = _b[_a]; // If we have already included a literal or wildcard path with a // higher priority extension, we should skip this file. // // This handles cases where we may encounter both <file>.ts and // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same // directory when they are compilation outputs. if (hasFileWithHigherPriorityExtension(file, literalFileMap, wildcardFileMap, supportedExtensions, keyMapper)) { continue; } // We may have included a wildcard path with a lower priority // extension due to the user-defined order of entries in the // "include" array. If there is a lower priority extension in the // same directory, we should remove it. removeWildcardFilesWithLowerPriorityExtension(file, wildcardFileMap, supportedExtensions, keyMapper); var key = keyMapper(file); if (!(key in literalFileMap) && !(key in wildcardFileMap)) { wildcardFileMap[key] = file; } } } var literalFiles = ts.reduceProperties(literalFileMap, addFileToOutput, []); var wildcardFiles = ts.reduceProperties(wildcardFileMap, addFileToOutput, []); wildcardFiles.sort(host.useCaseSensitiveFileNames ? ts.compareStrings : ts.compareStringsCaseInsensitive); return { fileNames: literalFiles.concat(wildcardFiles), wildcardDirectories: wildcardDirectories }; }
javascript
function matchFileNames(fileNames, include, exclude, basePath, options, host, errors) { basePath = ts.normalizePath(basePath); // The exclude spec list is converted into a regular expression, which allows us to quickly // test whether a file or directory should be excluded before recursively traversing the // file system. var keyMapper = host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper; // Literal file names (provided via the "files" array in tsconfig.json) are stored in a // file map with a possibly case insensitive key. We use this map later when when including // wildcard paths. var literalFileMap = ts.createMap(); // Wildcard paths (provided via the "includes" array in tsconfig.json) are stored in a // file map with a possibly case insensitive key. We use this map to store paths matched // via wildcard, and to handle extension priority. var wildcardFileMap = ts.createMap(); if (include) { include = validateSpecs(include, errors, /*allowTrailingRecursion*/ false); } if (exclude) { exclude = validateSpecs(exclude, errors, /*allowTrailingRecursion*/ true); } // Wildcard directories (provided as part of a wildcard path) are stored in a // file map that marks whether it was a regular wildcard match (with a `*` or `?` token), // or a recursive directory. This information is used by filesystem watchers to monitor for // new entries in these paths. var wildcardDirectories = getWildcardDirectories(include, exclude, basePath, host.useCaseSensitiveFileNames); // Rather than requery this for each file and filespec, we query the supported extensions // once and store it on the expansion context. var supportedExtensions = ts.getSupportedExtensions(options); // Literal files are always included verbatim. An "include" or "exclude" specification cannot // remove a literal file. if (fileNames) { for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) { var fileName = fileNames_1[_i]; var file = ts.combinePaths(basePath, fileName); literalFileMap[keyMapper(file)] = file; } } if (include && include.length > 0) { for (var _a = 0, _b = host.readDirectory(basePath, supportedExtensions, exclude, include); _a < _b.length; _a++) { var file = _b[_a]; // If we have already included a literal or wildcard path with a // higher priority extension, we should skip this file. // // This handles cases where we may encounter both <file>.ts and // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same // directory when they are compilation outputs. if (hasFileWithHigherPriorityExtension(file, literalFileMap, wildcardFileMap, supportedExtensions, keyMapper)) { continue; } // We may have included a wildcard path with a lower priority // extension due to the user-defined order of entries in the // "include" array. If there is a lower priority extension in the // same directory, we should remove it. removeWildcardFilesWithLowerPriorityExtension(file, wildcardFileMap, supportedExtensions, keyMapper); var key = keyMapper(file); if (!(key in literalFileMap) && !(key in wildcardFileMap)) { wildcardFileMap[key] = file; } } } var literalFiles = ts.reduceProperties(literalFileMap, addFileToOutput, []); var wildcardFiles = ts.reduceProperties(wildcardFileMap, addFileToOutput, []); wildcardFiles.sort(host.useCaseSensitiveFileNames ? ts.compareStrings : ts.compareStringsCaseInsensitive); return { fileNames: literalFiles.concat(wildcardFiles), wildcardDirectories: wildcardDirectories }; }
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Expands an array of file specifications. @param fileNames The literal file names to include. @param include The wildcard file specifications to include. @param exclude The wildcard file specifications to exclude. @param basePath The base path for any relative file specifications. @param options Compiler options. @param host The host used to resolve files and directories. @param errors An array for diagnostic reporting.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L47212-L47279
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getWildcardDirectories
function getWildcardDirectories(include, exclude, path, useCaseSensitiveFileNames) { // We watch a directory recursively if it contains a wildcard anywhere in a directory segment // of the pattern: // // /a/b/**/d - Watch /a/b recursively to catch changes to any d in any subfolder recursively // /a/b/*/d - Watch /a/b recursively to catch any d in any immediate subfolder, even if a new subfolder is added // // We watch a directory without recursion if it contains a wildcard in the file segment of // the pattern: // // /a/b/* - Watch /a/b directly to catch any new file // /a/b/a?z - Watch /a/b directly to catch any new file matching a?z var rawExcludeRegex = ts.getRegularExpressionForWildcard(exclude, path, "exclude"); var excludeRegex = rawExcludeRegex && new RegExp(rawExcludeRegex, useCaseSensitiveFileNames ? "" : "i"); var wildcardDirectories = ts.createMap(); if (include !== undefined) { var recursiveKeys = []; for (var _i = 0, include_1 = include; _i < include_1.length; _i++) { var file = include_1[_i]; var name_36 = ts.normalizePath(ts.combinePaths(path, file)); if (excludeRegex && excludeRegex.test(name_36)) { continue; } var match = wildcardDirectoryPattern.exec(name_36); if (match) { var key = useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase(); var flags = watchRecursivePattern.test(name_36) ? 1 /* Recursive */ : 0 /* None */; var existingFlags = wildcardDirectories[key]; if (existingFlags === undefined || existingFlags < flags) { wildcardDirectories[key] = flags; if (flags === 1 /* Recursive */) { recursiveKeys.push(key); } } } } // Remove any subpaths under an existing recursively watched directory. for (var key in wildcardDirectories) { for (var _a = 0, recursiveKeys_1 = recursiveKeys; _a < recursiveKeys_1.length; _a++) { var recursiveKey = recursiveKeys_1[_a]; if (key !== recursiveKey && ts.containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) { delete wildcardDirectories[key]; } } } } return wildcardDirectories; }
javascript
function getWildcardDirectories(include, exclude, path, useCaseSensitiveFileNames) { // We watch a directory recursively if it contains a wildcard anywhere in a directory segment // of the pattern: // // /a/b/**/d - Watch /a/b recursively to catch changes to any d in any subfolder recursively // /a/b/*/d - Watch /a/b recursively to catch any d in any immediate subfolder, even if a new subfolder is added // // We watch a directory without recursion if it contains a wildcard in the file segment of // the pattern: // // /a/b/* - Watch /a/b directly to catch any new file // /a/b/a?z - Watch /a/b directly to catch any new file matching a?z var rawExcludeRegex = ts.getRegularExpressionForWildcard(exclude, path, "exclude"); var excludeRegex = rawExcludeRegex && new RegExp(rawExcludeRegex, useCaseSensitiveFileNames ? "" : "i"); var wildcardDirectories = ts.createMap(); if (include !== undefined) { var recursiveKeys = []; for (var _i = 0, include_1 = include; _i < include_1.length; _i++) { var file = include_1[_i]; var name_36 = ts.normalizePath(ts.combinePaths(path, file)); if (excludeRegex && excludeRegex.test(name_36)) { continue; } var match = wildcardDirectoryPattern.exec(name_36); if (match) { var key = useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase(); var flags = watchRecursivePattern.test(name_36) ? 1 /* Recursive */ : 0 /* None */; var existingFlags = wildcardDirectories[key]; if (existingFlags === undefined || existingFlags < flags) { wildcardDirectories[key] = flags; if (flags === 1 /* Recursive */) { recursiveKeys.push(key); } } } } // Remove any subpaths under an existing recursively watched directory. for (var key in wildcardDirectories) { for (var _a = 0, recursiveKeys_1 = recursiveKeys; _a < recursiveKeys_1.length; _a++) { var recursiveKey = recursiveKeys_1[_a]; if (key !== recursiveKey && ts.containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) { delete wildcardDirectories[key]; } } } } return wildcardDirectories; }
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Gets directories in a set of include patterns that should be watched for changes.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L47302-L47349
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
hasFileWithHigherPriorityExtension
function hasFileWithHigherPriorityExtension(file, literalFiles, wildcardFiles, extensions, keyMapper) { var extensionPriority = ts.getExtensionPriority(file, extensions); var adjustedExtensionPriority = ts.adjustExtensionPriority(extensionPriority); for (var i = 0 /* Highest */; i < adjustedExtensionPriority; i++) { var higherPriorityExtension = extensions[i]; var higherPriorityPath = keyMapper(ts.changeExtension(file, higherPriorityExtension)); if (higherPriorityPath in literalFiles || higherPriorityPath in wildcardFiles) { return true; } } return false; }
javascript
function hasFileWithHigherPriorityExtension(file, literalFiles, wildcardFiles, extensions, keyMapper) { var extensionPriority = ts.getExtensionPriority(file, extensions); var adjustedExtensionPriority = ts.adjustExtensionPriority(extensionPriority); for (var i = 0 /* Highest */; i < adjustedExtensionPriority; i++) { var higherPriorityExtension = extensions[i]; var higherPriorityPath = keyMapper(ts.changeExtension(file, higherPriorityExtension)); if (higherPriorityPath in literalFiles || higherPriorityPath in wildcardFiles) { return true; } } return false; }
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Determines whether a literal or wildcard file has already been included that has a higher extension priority. @param file The path to the file. @param extensionPriority The priority of the extension. @param context The expansion context.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L47358-L47369
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
removeWildcardFilesWithLowerPriorityExtension
function removeWildcardFilesWithLowerPriorityExtension(file, wildcardFiles, extensions, keyMapper) { var extensionPriority = ts.getExtensionPriority(file, extensions); var nextExtensionPriority = ts.getNextLowestExtensionPriority(extensionPriority); for (var i = nextExtensionPriority; i < extensions.length; i++) { var lowerPriorityExtension = extensions[i]; var lowerPriorityPath = keyMapper(ts.changeExtension(file, lowerPriorityExtension)); delete wildcardFiles[lowerPriorityPath]; } }
javascript
function removeWildcardFilesWithLowerPriorityExtension(file, wildcardFiles, extensions, keyMapper) { var extensionPriority = ts.getExtensionPriority(file, extensions); var nextExtensionPriority = ts.getNextLowestExtensionPriority(extensionPriority); for (var i = nextExtensionPriority; i < extensions.length; i++) { var lowerPriorityExtension = extensions[i]; var lowerPriorityPath = keyMapper(ts.changeExtension(file, lowerPriorityExtension)); delete wildcardFiles[lowerPriorityPath]; } }
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Removes files included via wildcard expansion with a lower extension priority that have already been included. @param file The path to the file. @param extensionPriority The priority of the extension. @param context The expansion context.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L47378-L47386
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
startNode
function startNode(node) { var navNode = emptyNavigationBarNode(node); pushChild(parent, navNode); // Save the old parent parentsStack.push(parent); parent = navNode; }
javascript
function startNode(node) { var navNode = emptyNavigationBarNode(node); pushChild(parent, navNode); // Save the old parent parentsStack.push(parent); parent = navNode; }
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Add a new level of NavigationBarNodes. This pushes to the stack, so you must call `endNode` when you are done adding to this node.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L47827-L47833
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
endNode
function endNode() { if (parent.children) { mergeChildren(parent.children); sortChildren(parent.children); } parent = parentsStack.pop(); }
javascript
function endNode() { if (parent.children) { mergeChildren(parent.children); sortChildren(parent.children); } parent = parentsStack.pop(); }
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Call after calling `startNode` and adding children to it.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L47835-L47841
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
mergeChildren
function mergeChildren(children) { var nameToItems = ts.createMap(); ts.filterMutate(children, function (child) { var decl = child.node; var name = decl.name && nodeText(decl.name); if (!name) { // Anonymous items are never merged. return true; } var itemsWithSameName = nameToItems[name]; if (!itemsWithSameName) { nameToItems[name] = child; return true; } if (itemsWithSameName instanceof Array) { for (var _i = 0, itemsWithSameName_1 = itemsWithSameName; _i < itemsWithSameName_1.length; _i++) { var itemWithSameName = itemsWithSameName_1[_i]; if (tryMerge(itemWithSameName, child)) { return false; } } itemsWithSameName.push(child); return true; } else { var itemWithSameName = itemsWithSameName; if (tryMerge(itemWithSameName, child)) { return false; } nameToItems[name] = [itemWithSameName, child]; return true; } function tryMerge(a, b) { if (shouldReallyMerge(a.node, b.node)) { merge(a, b); return true; } return false; } }); /** a and b have the same name, but they may not be mergeable. */ function shouldReallyMerge(a, b) { return a.kind === b.kind && (a.kind !== 225 /* ModuleDeclaration */ || areSameModule(a, b)); // We use 1 NavNode to represent 'A.B.C', but there are multiple source nodes. // Only merge module nodes that have the same chain. Don't merge 'A.B.C' with 'A'! function areSameModule(a, b) { if (a.body.kind !== b.body.kind) { return false; } if (a.body.kind !== 225 /* ModuleDeclaration */) { return true; } return areSameModule(a.body, b.body); } } /** Merge source into target. Source should be thrown away after this is called. */ function merge(target, source) { target.additionalNodes = target.additionalNodes || []; target.additionalNodes.push(source.node); if (source.additionalNodes) { (_a = target.additionalNodes).push.apply(_a, source.additionalNodes); } target.children = ts.concatenate(target.children, source.children); if (target.children) { mergeChildren(target.children); sortChildren(target.children); } var _a; } }
javascript
function mergeChildren(children) { var nameToItems = ts.createMap(); ts.filterMutate(children, function (child) { var decl = child.node; var name = decl.name && nodeText(decl.name); if (!name) { // Anonymous items are never merged. return true; } var itemsWithSameName = nameToItems[name]; if (!itemsWithSameName) { nameToItems[name] = child; return true; } if (itemsWithSameName instanceof Array) { for (var _i = 0, itemsWithSameName_1 = itemsWithSameName; _i < itemsWithSameName_1.length; _i++) { var itemWithSameName = itemsWithSameName_1[_i]; if (tryMerge(itemWithSameName, child)) { return false; } } itemsWithSameName.push(child); return true; } else { var itemWithSameName = itemsWithSameName; if (tryMerge(itemWithSameName, child)) { return false; } nameToItems[name] = [itemWithSameName, child]; return true; } function tryMerge(a, b) { if (shouldReallyMerge(a.node, b.node)) { merge(a, b); return true; } return false; } }); /** a and b have the same name, but they may not be mergeable. */ function shouldReallyMerge(a, b) { return a.kind === b.kind && (a.kind !== 225 /* ModuleDeclaration */ || areSameModule(a, b)); // We use 1 NavNode to represent 'A.B.C', but there are multiple source nodes. // Only merge module nodes that have the same chain. Don't merge 'A.B.C' with 'A'! function areSameModule(a, b) { if (a.body.kind !== b.body.kind) { return false; } if (a.body.kind !== 225 /* ModuleDeclaration */) { return true; } return areSameModule(a.body, b.body); } } /** Merge source into target. Source should be thrown away after this is called. */ function merge(target, source) { target.additionalNodes = target.additionalNodes || []; target.additionalNodes.push(source.node); if (source.additionalNodes) { (_a = target.additionalNodes).push.apply(_a, source.additionalNodes); } target.children = ts.concatenate(target.children, source.children); if (target.children) { mergeChildren(target.children); sortChildren(target.children); } var _a; } }
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Merge declarations of the same kind.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L47969-L48038
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
shouldReallyMerge
function shouldReallyMerge(a, b) { return a.kind === b.kind && (a.kind !== 225 /* ModuleDeclaration */ || areSameModule(a, b)); // We use 1 NavNode to represent 'A.B.C', but there are multiple source nodes. // Only merge module nodes that have the same chain. Don't merge 'A.B.C' with 'A'! function areSameModule(a, b) { if (a.body.kind !== b.body.kind) { return false; } if (a.body.kind !== 225 /* ModuleDeclaration */) { return true; } return areSameModule(a.body, b.body); } }
javascript
function shouldReallyMerge(a, b) { return a.kind === b.kind && (a.kind !== 225 /* ModuleDeclaration */ || areSameModule(a, b)); // We use 1 NavNode to represent 'A.B.C', but there are multiple source nodes. // Only merge module nodes that have the same chain. Don't merge 'A.B.C' with 'A'! function areSameModule(a, b) { if (a.body.kind !== b.body.kind) { return false; } if (a.body.kind !== 225 /* ModuleDeclaration */) { return true; } return areSameModule(a.body, b.body); } }
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a and b have the same name, but they may not be mergeable.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L48010-L48023
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
areSameModule
function areSameModule(a, b) { if (a.body.kind !== b.body.kind) { return false; } if (a.body.kind !== 225 /* ModuleDeclaration */) { return true; } return areSameModule(a.body, b.body); }
javascript
function areSameModule(a, b) { if (a.body.kind !== b.body.kind) { return false; } if (a.body.kind !== 225 /* ModuleDeclaration */) { return true; } return areSameModule(a.body, b.body); }
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We use 1 NavNode to represent 'A.B.C', but there are multiple source nodes. Only merge module nodes that have the same chain. Don't merge 'A.B.C' with 'A'!
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L48014-L48022
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
merge
function merge(target, source) { target.additionalNodes = target.additionalNodes || []; target.additionalNodes.push(source.node); if (source.additionalNodes) { (_a = target.additionalNodes).push.apply(_a, source.additionalNodes); } target.children = ts.concatenate(target.children, source.children); if (target.children) { mergeChildren(target.children); sortChildren(target.children); } var _a; }
javascript
function merge(target, source) { target.additionalNodes = target.additionalNodes || []; target.additionalNodes.push(source.node); if (source.additionalNodes) { (_a = target.additionalNodes).push.apply(_a, source.additionalNodes); } target.children = ts.concatenate(target.children, source.children); if (target.children) { mergeChildren(target.children); sortChildren(target.children); } var _a; }
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Merge source into target. Source should be thrown away after this is called.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L48025-L48037
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
topLevelItems
function topLevelItems(root) { var topLevel = []; function recur(item) { if (isTopLevel(item)) { topLevel.push(item); if (item.children) { for (var _i = 0, _a = item.children; _i < _a.length; _i++) { var child = _a[_i]; recur(child); } } } } recur(root); return topLevel; function isTopLevel(item) { switch (navigationBarNodeKind(item)) { case 221 /* ClassDeclaration */: case 192 /* ClassExpression */: case 224 /* EnumDeclaration */: case 222 /* InterfaceDeclaration */: case 225 /* ModuleDeclaration */: case 256 /* SourceFile */: case 223 /* TypeAliasDeclaration */: case 279 /* JSDocTypedefTag */: return true; case 148 /* Constructor */: case 147 /* MethodDeclaration */: case 149 /* GetAccessor */: case 150 /* SetAccessor */: return hasSomeImportantChild(item); case 180 /* ArrowFunction */: case 220 /* FunctionDeclaration */: case 179 /* FunctionExpression */: return isTopLevelFunctionDeclaration(item); default: return false; } function isTopLevelFunctionDeclaration(item) { if (!item.node.body) { return false; } switch (navigationBarNodeKind(item.parent)) { case 226 /* ModuleBlock */: case 256 /* SourceFile */: case 147 /* MethodDeclaration */: case 148 /* Constructor */: return true; default: return hasSomeImportantChild(item); } } function hasSomeImportantChild(item) { return ts.forEach(item.children, function (child) { var childKind = navigationBarNodeKind(child); return childKind !== 218 /* VariableDeclaration */ && childKind !== 169 /* BindingElement */; }); } } }
javascript
function topLevelItems(root) { var topLevel = []; function recur(item) { if (isTopLevel(item)) { topLevel.push(item); if (item.children) { for (var _i = 0, _a = item.children; _i < _a.length; _i++) { var child = _a[_i]; recur(child); } } } } recur(root); return topLevel; function isTopLevel(item) { switch (navigationBarNodeKind(item)) { case 221 /* ClassDeclaration */: case 192 /* ClassExpression */: case 224 /* EnumDeclaration */: case 222 /* InterfaceDeclaration */: case 225 /* ModuleDeclaration */: case 256 /* SourceFile */: case 223 /* TypeAliasDeclaration */: case 279 /* JSDocTypedefTag */: return true; case 148 /* Constructor */: case 147 /* MethodDeclaration */: case 149 /* GetAccessor */: case 150 /* SetAccessor */: return hasSomeImportantChild(item); case 180 /* ArrowFunction */: case 220 /* FunctionDeclaration */: case 179 /* FunctionExpression */: return isTopLevelFunctionDeclaration(item); default: return false; } function isTopLevelFunctionDeclaration(item) { if (!item.node.body) { return false; } switch (navigationBarNodeKind(item.parent)) { case 226 /* ModuleBlock */: case 256 /* SourceFile */: case 147 /* MethodDeclaration */: case 148 /* Constructor */: return true; default: return hasSomeImportantChild(item); } } function hasSomeImportantChild(item) { return ts.forEach(item.children, function (child) { var childKind = navigationBarNodeKind(child); return childKind !== 218 /* VariableDeclaration */ && childKind !== 169 /* BindingElement */; }); } } }
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Flattens the NavNode tree to a list, keeping only the top-level items.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L48154-L48213
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getArgumentIndexForTemplatePiece
function getArgumentIndexForTemplatePiece(spanIndex, node, position) { // Because the TemplateStringsArray is the first argument, we have to offset each substitution expression by 1. // There are three cases we can encounter: // 1. We are precisely in the template literal (argIndex = 0). // 2. We are in or to the right of the substitution expression (argIndex = spanIndex + 1). // 3. We are directly to the right of the template literal, but because we look for the token on the left, // not enough to put us in the substitution expression; we should consider ourselves part of // the *next* span's expression by offsetting the index (argIndex = (spanIndex + 1) + 1). // // Example: f `# abcd $#{# 1 + 1# }# efghi ${ #"#hello"# } # ` // ^ ^ ^ ^ ^ ^ ^ ^ ^ // Case: 1 1 3 2 1 3 2 2 1 ts.Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node."); if (ts.isTemplateLiteralKind(node.kind)) { if (ts.isInsideTemplateLiteral(node, position)) { return 0; } return spanIndex + 2; } return spanIndex + 1; }
javascript
function getArgumentIndexForTemplatePiece(spanIndex, node, position) { // Because the TemplateStringsArray is the first argument, we have to offset each substitution expression by 1. // There are three cases we can encounter: // 1. We are precisely in the template literal (argIndex = 0). // 2. We are in or to the right of the substitution expression (argIndex = spanIndex + 1). // 3. We are directly to the right of the template literal, but because we look for the token on the left, // not enough to put us in the substitution expression; we should consider ourselves part of // the *next* span's expression by offsetting the index (argIndex = (spanIndex + 1) + 1). // // Example: f `# abcd $#{# 1 + 1# }# efghi ${ #"#hello"# } # ` // ^ ^ ^ ^ ^ ^ ^ ^ ^ // Case: 1 1 3 2 1 3 2 2 1 ts.Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node."); if (ts.isTemplateLiteralKind(node.kind)) { if (ts.isInsideTemplateLiteral(node, position)) { return 0; } return spanIndex + 2; } return spanIndex + 1; }
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spanIndex is either the index for a given template span. This does not give appropriate results for a NoSubstitutionTemplateLiteral
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L49218-L49238
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getTokenAtPosition
function getTokenAtPosition(sourceFile, position, includeJsDocComment) { if (includeJsDocComment === void 0) { includeJsDocComment = false; } return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined, includeJsDocComment); }
javascript
function getTokenAtPosition(sourceFile, position, includeJsDocComment) { if (includeJsDocComment === void 0) { includeJsDocComment = false; } return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined, includeJsDocComment); }
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Returns a token if position is in [start-of-leading-trivia, end)
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L49657-L49660
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isInsideJsxElementOrAttribute
function isInsideJsxElementOrAttribute(sourceFile, position) { var token = getTokenAtPosition(sourceFile, position); if (!token) { return false; } if (token.kind === 244 /* JsxText */) { return true; } // <div>Hello |</div> if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 244 /* JsxText */) { return true; } // <div> { | </div> or <div a={| </div> if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 248 /* JsxExpression */) { return true; } // <div> { // | // } < /div> if (token && token.kind === 16 /* CloseBraceToken */ && token.parent.kind === 248 /* JsxExpression */) { return true; } // <div>|</div> if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 245 /* JsxClosingElement */) { return true; } return false; }
javascript
function isInsideJsxElementOrAttribute(sourceFile, position) { var token = getTokenAtPosition(sourceFile, position); if (!token) { return false; } if (token.kind === 244 /* JsxText */) { return true; } // <div>Hello |</div> if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 244 /* JsxText */) { return true; } // <div> { | </div> or <div a={| </div> if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 248 /* JsxExpression */) { return true; } // <div> { // | // } < /div> if (token && token.kind === 16 /* CloseBraceToken */ && token.parent.kind === 248 /* JsxExpression */) { return true; } // <div>|</div> if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 245 /* JsxClosingElement */) { return true; } return false; }
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returns true if the position is in between the open and close elements of an JSX expression.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L49843-L49870
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
isInCommentHelper
function isInCommentHelper(sourceFile, position, predicate) { var token = getTokenAtPosition(sourceFile, position); if (token && position <= token.getStart(sourceFile)) { var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos); // The end marker of a single-line comment does not include the newline character. // In the following case, we are inside a comment (^ denotes the cursor position): // // // asdf ^\n // // But for multi-line comments, we don't want to be inside the comment in the following case: // // /* asdf */^ // // Internally, we represent the end of the comment at the newline and closing '/', respectively. return predicate ? ts.forEach(commentRanges, function (c) { return c.pos < position && (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end) && predicate(c); }) : ts.forEach(commentRanges, function (c) { return c.pos < position && (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end); }); } return false; }
javascript
function isInCommentHelper(sourceFile, position, predicate) { var token = getTokenAtPosition(sourceFile, position); if (token && position <= token.getStart(sourceFile)) { var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos); // The end marker of a single-line comment does not include the newline character. // In the following case, we are inside a comment (^ denotes the cursor position): // // // asdf ^\n // // But for multi-line comments, we don't want to be inside the comment in the following case: // // /* asdf */^ // // Internally, we represent the end of the comment at the newline and closing '/', respectively. return predicate ? ts.forEach(commentRanges, function (c) { return c.pos < position && (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end) && predicate(c); }) : ts.forEach(commentRanges, function (c) { return c.pos < position && (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end); }); } return false; }
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Returns true if the cursor at position in sourceFile is within a comment that additionally satisfies predicate, and false otherwise.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L49881-L49903
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
mergeTypings
function mergeTypings(typingNames) { if (!typingNames) { return; } for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) { var typing = typingNames_1[_i]; if (!(typing in inferredTypings)) { inferredTypings[typing] = undefined; } } }
javascript
function mergeTypings(typingNames) { if (!typingNames) { return; } for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) { var typing = typingNames_1[_i]; if (!(typing in inferredTypings)) { inferredTypings[typing] = undefined; } } }
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Merge a given list of typingNames to the inferredTypings map
[ "Merge", "a", "given", "list", "of", "typingNames", "to", "the", "inferredTypings", "map" ]
c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L50444-L50454
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getTypingNamesFromJson
function getTypingNamesFromJson(jsonPath, filesToWatch) { if (host.fileExists(jsonPath)) { filesToWatch.push(jsonPath); } var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); }); if (result.config) { var jsonConfig = result.config; if (jsonConfig.dependencies) { mergeTypings(ts.getOwnKeys(jsonConfig.dependencies)); } if (jsonConfig.devDependencies) { mergeTypings(ts.getOwnKeys(jsonConfig.devDependencies)); } if (jsonConfig.optionalDependencies) { mergeTypings(ts.getOwnKeys(jsonConfig.optionalDependencies)); } if (jsonConfig.peerDependencies) { mergeTypings(ts.getOwnKeys(jsonConfig.peerDependencies)); } } }
javascript
function getTypingNamesFromJson(jsonPath, filesToWatch) { if (host.fileExists(jsonPath)) { filesToWatch.push(jsonPath); } var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); }); if (result.config) { var jsonConfig = result.config; if (jsonConfig.dependencies) { mergeTypings(ts.getOwnKeys(jsonConfig.dependencies)); } if (jsonConfig.devDependencies) { mergeTypings(ts.getOwnKeys(jsonConfig.devDependencies)); } if (jsonConfig.optionalDependencies) { mergeTypings(ts.getOwnKeys(jsonConfig.optionalDependencies)); } if (jsonConfig.peerDependencies) { mergeTypings(ts.getOwnKeys(jsonConfig.peerDependencies)); } } }
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Get the typing info from common package manager json files like package.json or bower.json
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L50458-L50478
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getTypingNamesFromSourceFileNames
function getTypingNamesFromSourceFileNames(fileNames) { var jsFileNames = ts.filter(fileNames, ts.hasJavaScriptFileExtension); var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); }); var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); }); if (safeList !== EmptySafeList) { mergeTypings(ts.filter(cleanedTypingNames, function (f) { return f in safeList; })); } var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.ensureScriptKind(f, ts.getScriptKindFromFileName(f)) === 2 /* JSX */; }); if (hasJsxFile) { mergeTypings(["react"]); } }
javascript
function getTypingNamesFromSourceFileNames(fileNames) { var jsFileNames = ts.filter(fileNames, ts.hasJavaScriptFileExtension); var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); }); var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); }); if (safeList !== EmptySafeList) { mergeTypings(ts.filter(cleanedTypingNames, function (f) { return f in safeList; })); } var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.ensureScriptKind(f, ts.getScriptKindFromFileName(f)) === 2 /* JSX */; }); if (hasJsxFile) { mergeTypings(["react"]); } }
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Infer typing names from given file names. For example, the file name "jquery-min.2.3.4.js" should be inferred to the 'jquery' typing name; and "angular-route.1.2.3.js" should be inferred to the 'angular-route' typing name. @param fileNames are the names for source files in the project
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L50485-L50496
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getTypingNamesFromNodeModuleFolder
function getTypingNamesFromNodeModuleFolder(nodeModulesPath) { // Todo: add support for ModuleResolutionHost too if (!host.directoryExists(nodeModulesPath)) { return; } var typingNames = []; var fileNames = host.readDirectory(nodeModulesPath, [".json"], /*excludes*/ undefined, /*includes*/ undefined, /*depth*/ 2); for (var _i = 0, fileNames_2 = fileNames; _i < fileNames_2.length; _i++) { var fileName = fileNames_2[_i]; var normalizedFileName = ts.normalizePath(fileName); if (ts.getBaseFileName(normalizedFileName) !== "package.json") { continue; } var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); }); if (!result.config) { continue; } var packageJson = result.config; // npm 3's package.json contains a "_requiredBy" field // we should include all the top level module names for npm 2, and only module names whose // "_requiredBy" field starts with "#" or equals "/" for npm 3. if (packageJson._requiredBy && ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) { continue; } // If the package has its own d.ts typings, those will take precedence. Otherwise the package name will be used // to download d.ts files from DefinitelyTyped if (!packageJson.name) { continue; } if (packageJson.typings) { var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName)); inferredTypings[packageJson.name] = absolutePath; } else { typingNames.push(packageJson.name); } } mergeTypings(typingNames); }
javascript
function getTypingNamesFromNodeModuleFolder(nodeModulesPath) { // Todo: add support for ModuleResolutionHost too if (!host.directoryExists(nodeModulesPath)) { return; } var typingNames = []; var fileNames = host.readDirectory(nodeModulesPath, [".json"], /*excludes*/ undefined, /*includes*/ undefined, /*depth*/ 2); for (var _i = 0, fileNames_2 = fileNames; _i < fileNames_2.length; _i++) { var fileName = fileNames_2[_i]; var normalizedFileName = ts.normalizePath(fileName); if (ts.getBaseFileName(normalizedFileName) !== "package.json") { continue; } var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); }); if (!result.config) { continue; } var packageJson = result.config; // npm 3's package.json contains a "_requiredBy" field // we should include all the top level module names for npm 2, and only module names whose // "_requiredBy" field starts with "#" or equals "/" for npm 3. if (packageJson._requiredBy && ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) { continue; } // If the package has its own d.ts typings, those will take precedence. Otherwise the package name will be used // to download d.ts files from DefinitelyTyped if (!packageJson.name) { continue; } if (packageJson.typings) { var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName)); inferredTypings[packageJson.name] = absolutePath; } else { typingNames.push(packageJson.name); } } mergeTypings(typingNames); }
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Infer typing names from node_module folder @param nodeModulesPath is the path to the "node_modules" folder
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L50501-L50540
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
getScanStartPosition
function getScanStartPosition(enclosingNode, originalRange, sourceFile) { var start = enclosingNode.getStart(sourceFile); if (start === originalRange.pos && enclosingNode.end === originalRange.end) { return start; } var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile); if (!precedingToken) { // no preceding token found - start from the beginning of enclosing node return enclosingNode.pos; } // preceding token ends after the start of original range (i.e when originalRange.pos falls in the middle of literal) // start from the beginning of enclosingNode to handle the entire 'originalRange' if (precedingToken.end >= originalRange.pos) { return enclosingNode.pos; } return precedingToken.end; }
javascript
function getScanStartPosition(enclosingNode, originalRange, sourceFile) { var start = enclosingNode.getStart(sourceFile); if (start === originalRange.pos && enclosingNode.end === originalRange.end) { return start; } var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile); if (!precedingToken) { // no preceding token found - start from the beginning of enclosing node return enclosingNode.pos; } // preceding token ends after the start of original range (i.e when originalRange.pos falls in the middle of literal) // start from the beginning of enclosingNode to handle the entire 'originalRange' if (precedingToken.end >= originalRange.pos) { return enclosingNode.pos; } return precedingToken.end; }
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Start of the original range might fall inside the comment - scanner will not yield appropriate results This function will look for token that is located before the start of target range and return its end as start position for the scanner.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L52155-L52171
train
opendigitaleducation/sijil.js
docs/libs/typescript.js
tryComputeIndentationForListItem
function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) { if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) || ts.rangeContainsStartEnd(range, startPos, endPos) /* Not to miss zero-range nodes e.g. JsxText */) { if (inheritedIndentation !== -1 /* Unknown */) { return inheritedIndentation; } } else { var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line; var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile); var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options); if (startLine !== parentStartLine || startPos === column) { // Use the base indent size if it is greater than // the indentation of the inherited predecessor. var baseIndentSize = formatting.SmartIndenter.getBaseIndentation(options); return baseIndentSize > column ? baseIndentSize : column; } } return -1 /* Unknown */; }
javascript
function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) { if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) || ts.rangeContainsStartEnd(range, startPos, endPos) /* Not to miss zero-range nodes e.g. JsxText */) { if (inheritedIndentation !== -1 /* Unknown */) { return inheritedIndentation; } } else { var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line; var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile); var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options); if (startLine !== parentStartLine || startPos === column) { // Use the base indent size if it is greater than // the indentation of the inherited predecessor. var baseIndentSize = formatting.SmartIndenter.getBaseIndentation(options); return baseIndentSize > column ? baseIndentSize : column; } } return -1 /* Unknown */; }
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local functions Tries to compute the indentation for a list element. If list element is not in range then function will pick its actual indentation so it can be pushed downstream as inherited indentation. If list element is in the range - its indentation will be equal to inherited indentation from its predecessors.
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c0cd5250a573689a8bcd9733b958d4215b0ecfa4
https://github.com/opendigitaleducation/sijil.js/blob/c0cd5250a573689a8bcd9733b958d4215b0ecfa4/docs/libs/typescript.js#L52246-L52265
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