0
|
1 <!doctype html>
|
|
2
|
|
3 <title>CodeMirror: Crystal mode</title>
|
|
4 <meta charset="utf-8"/>
|
|
5 <link rel=stylesheet href="../../doc/docs.css">
|
|
6
|
|
7 <link rel="stylesheet" href="../../lib/codemirror.css">
|
|
8 <script src="../../lib/codemirror.js"></script>
|
|
9 <script src="../../addon/edit/matchbrackets.js"></script>
|
|
10 <script src="crystal.js"></script>
|
|
11 <style>
|
|
12 .CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}
|
|
13 .cm-s-default span.cm-arrow { color: red; }
|
|
14 </style>
|
|
15
|
|
16 <div id=nav>
|
|
17 <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png" alt=""></a>
|
|
18
|
|
19 <ul>
|
|
20 <li><a href="../../index.html">Home</a>
|
|
21 <li><a href="../../doc/manual.html">Manual</a>
|
|
22 <li><a href="https://github.com/codemirror/codemirror5">Code</a>
|
|
23 </ul>
|
|
24 <ul>
|
|
25 <li><a href="../index.html">Language modes</a>
|
|
26 <li><a class=active href="#">Crystal</a>
|
|
27 </ul>
|
|
28 </div>
|
|
29
|
|
30 <article>
|
|
31 <h2>Crystal mode</h2>
|
|
32 <form><textarea id="code" name="code">
|
|
33 # Features of Crystal
|
|
34 # - Ruby-inspired syntax.
|
|
35 # - Statically type-checked but without having to specify the type of variables or method arguments.
|
|
36 # - Be able to call C code by writing bindings to it in Crystal.
|
|
37 # - Have compile-time evaluation and generation of code, to avoid boilerplate code.
|
|
38 # - Compile to efficient native code.
|
|
39
|
|
40 # A very basic HTTP server
|
|
41 require "http/server"
|
|
42
|
|
43 server = HTTP::Server.new(8080) do |request|
|
|
44 HTTP::Response.ok "text/plain", "Hello world, got #{request.path}!"
|
|
45 end
|
|
46
|
|
47 puts "Listening on http://0.0.0.0:8080"
|
|
48 server.listen
|
|
49
|
|
50 module Foo
|
|
51 abstract def abstract_method : String
|
|
52
|
|
53 @[AlwaysInline]
|
|
54 def with_foofoo
|
|
55 with Foo.new(self) yield
|
|
56 end
|
|
57
|
|
58 struct Foo
|
|
59 def initialize(@foo : ::Foo)
|
|
60 end
|
|
61
|
|
62 def hello_world
|
|
63 @foo.abstract_method
|
|
64 end
|
|
65 end
|
|
66 end
|
|
67
|
|
68 class Bar
|
|
69 include Foo
|
|
70
|
|
71 @@foobar = 12345
|
|
72
|
|
73 def initialize(@bar : Int32)
|
|
74 end
|
|
75
|
|
76 macro alias_method(name, method)
|
|
77 def {{ name }}(*args)
|
|
78 {{ method }}(*args)
|
|
79 end
|
|
80 end
|
|
81
|
|
82 def a_method
|
|
83 "Hello, World"
|
|
84 end
|
|
85
|
|
86 alias_method abstract_method, a_method
|
|
87
|
|
88 def show_instance_vars : Nil
|
|
89 {% for var in @type.instance_vars %}
|
|
90 puts "@{{ var }} = #{ @{{ var }} }"
|
|
91 {% end %}
|
|
92 end
|
|
93 end
|
|
94
|
|
95 class Baz < Bar; end
|
|
96
|
|
97 lib LibC
|
|
98 fun c_puts = "puts"(str : Char*) : Int
|
|
99 end
|
|
100
|
|
101 baz = Baz.new(100)
|
|
102 baz.show_instance_vars
|
|
103 baz.with_foofoo do
|
|
104 LibC.c_puts hello_world
|
|
105 end
|
|
106 </textarea></form>
|
|
107 <script>
|
|
108 var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
|
|
109 mode: "text/x-crystal",
|
|
110 matchBrackets: true,
|
|
111 indentUnit: 2
|
|
112 });
|
|
113 </script>
|
|
114
|
|
115 <p><strong>MIME types defined:</strong> <code>text/x-crystal</code>.</p>
|
|
116 </article>
|