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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | |
2 // for details. All rights reserved. Use of this source code is governed by a | |
3 // BSD-style license that can be found in the LICENSE file. | |
4 | |
5 library matcher.utils; | |
6 | |
7 /** | |
8 * Returns the name of the type of [x], or "Unknown" if the type name can't be | |
9 * determined. | |
10 */ | |
11 String typeName(x) { | |
12 // dart2js blows up on some objects (e.g. window.navigator). | |
13 // So we play safe here. | |
14 try { | |
15 if (x == null) return "null"; | |
16 var type = x.runtimeType.toString(); | |
17 // TODO(nweiz): if the object's type is private, find a public superclass to | |
18 // display once there's a portable API to do that. | |
19 return type.startsWith("_") ? "?" : type; | |
20 } catch (e) { | |
21 return "?"; | |
22 } | |
23 } | |
24 | |
25 /** | |
26 * Returns [source] with any control characters replaced by their escape | |
27 * sequences. | |
28 * | |
29 * This doesn't add quotes to the string, but it does escape single quote | |
30 * characters so that single quotes can be applied externally. | |
31 */ | |
32 String escapeString(String source) => | |
33 source.split("").map(_escapeChar).join(""); | |
34 | |
35 /** Return the escaped form of a character [ch]. */ | |
36 String _escapeChar(String ch) { | |
37 if (ch == "'") | |
38 return "\\'"; | |
39 else if (ch == '\n') | |
40 return '\\n'; | |
41 else if (ch == '\r') | |
42 return '\\r'; | |
43 else if (ch == '\t') | |
44 return '\\t'; | |
45 else | |
46 return ch; | |
47 } | |
48 | |
49 /** Indent each line in [str] by two spaces. */ | |
50 String indent(String str) => | |
51 str.replaceAll(new RegExp("^", multiLine: true), " "); | |
52 | |
53 /** A pair of values. */ | |
54 class Pair<E, F> { | |
55 E first; | |
56 F last; | |
57 | |
58 Pair(this.first, this.last); | |
59 | |
60 String toString() => '($first, $last)'; | |
61 | |
62 bool operator ==(other) { | |
63 if (other is! Pair) return false; | |
64 return other.first == first && other.last == last; | |
65 } | |
66 | |
67 int get hashCode => first.hashCode ^ last.hashCode; | |
68 } | |
69 | |
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