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| <title>CodeMirror: Crystal mode</title> | |
| <meta charset="utf-8"/> | |
| <link rel=stylesheet href="../../doc/docs.css"> | |
| <link rel="stylesheet" href="../../lib/codemirror.css"> | |
| <script src="../../lib/codemirror.js"></script> | |
| <script src="../../addon/edit/matchbrackets.js"></script> | |
| <script src="crystal.js"></script> | |
| <style> | |
| .CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;} | |
| .cm-s-default span.cm-arrow { color: red; } | |
| </style> | |
| <div id=nav> | |
| <a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a> | |
| <ul> | |
| <li><a href="../../index.html">Home</a> | |
| <li><a href="../../doc/manual.html">Manual</a> | |
| <li><a href="https://github.com/codemirror/codemirror">Code</a> | |
| </ul> | |
| <ul> | |
| <li><a href="../index.html">Language modes</a> | |
| <li><a class=active href="#">Crystal</a> | |
| </ul> | |
| </div> | |
| <article> | |
| <h2>Crystal mode</h2> | |
| <form><textarea id="code" name="code"> | |
| # Features of Crystal | |
| # - Ruby-inspired syntax. | |
| # - Statically type-checked but without having to specify the type of variables or method arguments. | |
| # - Be able to call C code by writing bindings to it in Crystal. | |
| # - Have compile-time evaluation and generation of code, to avoid boilerplate code. | |
| # - Compile to efficient native code. | |
| # A very basic HTTP server | |
| require "http/server" | |
| server = HTTP::Server.new(8080) do |request| | |
| HTTP::Response.ok "text/plain", "Hello world, got #{request.path}!" | |
| end | |
| puts "Listening on http://0.0.0.0:8080" | |
| server.listen | |
| module Foo | |
| abstract def abstract_method : String | |
| @[AlwaysInline] | |
| def with_foofoo | |
| with Foo.new(self) yield | |
| end | |
| struct Foo | |
| def initialize(@foo : ::Foo) | |
| end | |
| def hello_world | |
| @foo.abstract_method | |
| end | |
| end | |
| end | |
| class Bar | |
| include Foo | |
| @@foobar = 12345 | |
| def initialize(@bar : Int32) | |
| end | |
| macro alias_method(name, method) | |
| def {{ name }}(*args) | |
| {{ method }}(*args) | |
| end | |
| end | |
| def a_method | |
| "Hello, World" | |
| end | |
| alias_method abstract_method, a_method | |
| def show_instance_vars : Nil | |
| {% for var in @type.instance_vars %} | |
| puts "@{{ var }} = #{ @{{ var }} }" | |
| {% end %} | |
| end | |
| end | |
| class Baz < Bar; end | |
| lib LibC | |
| fun c_puts = "puts"(str : Char*) : Int | |
| end | |
| baz = Baz.new(100) | |
| baz.show_instance_vars | |
| baz.with_foofoo do | |
| LibC.c_puts hello_world | |
| end | |
| </textarea></form> | |
| <script> | |
| var editor = CodeMirror.fromTextArea(document.getElementById("code"), { | |
| mode: "text/x-crystal", | |
| matchBrackets: true, | |
| indentUnit: 2 | |
| }); | |
| </script> | |
| <p><strong>MIME types defined:</strong> <code>text/x-crystal</code>.</p> | |
| </article> | |