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import Node from './shared/Node.js';
import { walk } from 'estree-walker';
import compiler_errors from '../compiler_errors.js';
const applicable = new Set(['Identifier', 'ObjectExpression', 'ArrayExpression', 'Property']);
/** @extends Node<'Let'> */
export default class Let extends Node {
/** @type {import('estree').Identifier} */
name;
/** @type {import('estree').Identifier} */
value;
/** @type {string[]} */
names = [];
/**
* @param {import('../Component.js').default} component
* @param {import('./shared/Node.js').default} parent
* @param {import('./shared/TemplateScope.js').default} scope
* @param {import('../../interfaces.js').TemplateNode} info
*/
constructor(component, parent, scope, info) {
super(component, parent, scope, info);
this.name = { type: 'Identifier', name: info.name };
const { names } = this;
if (info.expression) {
this.value = info.expression;
walk(info.expression, {
/** @param {import('estree').Identifier | import('estree').BasePattern} node */
enter(node) {
if (!applicable.has(node.type)) {
return component.error(/** @type {any} */ (node), compiler_errors.invalid_let);
}
if (node.type === 'Identifier') {
names.push(/** @type {import('estree').Identifier} */ (node).name);
}
// slightly unfortunate hack
if (node.type === 'ArrayExpression') {
node.type = 'ArrayPattern';
}
if (node.type === 'ObjectExpression') {
node.type = 'ObjectPattern';
}
}
});
} else {
names.push(this.name.name);
}
}
}
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