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| 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 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. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 |
| 5 library matcher.util; | |
| 6 | |
| 7 import 'core_matchers.dart'; | 5 import 'core_matchers.dart'; |
| 8 import 'interfaces.dart'; | 6 import 'interfaces.dart'; |
| 9 | 7 |
| 10 /// A [Map] between whitespace characters and their escape sequences. | 8 /// A [Map] between whitespace characters and their escape sequences. |
| 11 const _escapeMap = const { | 9 const _escapeMap = const { |
| 12 '\n': r'\n', | 10 '\n': r'\n', |
| 13 '\r': r'\r', | 11 '\r': r'\r', |
| 14 '\f': r'\f', | 12 '\f': r'\f', |
| 15 '\b': r'\b', | 13 '\b': r'\b', |
| 16 '\t': r'\t', | 14 '\t': r'\t', |
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| 56 if (mapped != null) return mapped; | 54 if (mapped != null) return mapped; |
| 57 return _getHexLiteral(match[0]); | 55 return _getHexLiteral(match[0]); |
| 58 }); | 56 }); |
| 59 } | 57 } |
| 60 | 58 |
| 61 /// Given single-character string, return the hex-escaped equivalent. | 59 /// Given single-character string, return the hex-escaped equivalent. |
| 62 String _getHexLiteral(String input) { | 60 String _getHexLiteral(String input) { |
| 63 int rune = input.runes.single; | 61 int rune = input.runes.single; |
| 64 return r'\x' + rune.toRadixString(16).toUpperCase().padLeft(2, '0'); | 62 return r'\x' + rune.toRadixString(16).toUpperCase().padLeft(2, '0'); |
| 65 } | 63 } |
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