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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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 part of tree; | |
6 | |
7 /** | 5 /** |
8 * The [DartString] type represents a Dart string value as a sequence of Unicode | 6 * The [DartString] type represents a Dart string value as a sequence of Unicode |
9 * Scalar Values. | 7 * Scalar Values. |
10 * After parsing, any valid [LiteralString] will contain a [DartString] | 8 * After parsing, any valid [LiteralString] will contain a [DartString] |
11 * representing its content after removing quotes and resolving escapes in | 9 * representing its content after removing quotes and resolving escapes in |
12 * its source. | 10 * its source. |
13 */ | 11 */ |
14 abstract class DartString implements Iterable<int> { | 12 abstract class DartString implements Iterable<int> { |
15 factory DartString.empty() => const LiteralDartString(""); | 13 factory DartString.empty() => const LiteralDartString(""); |
16 // This is a convenience constructor. If you need a const literal DartString, | 14 // This is a convenience constructor. If you need a const literal DartString, |
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202 for (int i = 0; i < 3; i++) { | 200 for (int i = 0; i < 3; i++) { |
203 code = source.next(); | 201 code = source.next(); |
204 value = value * 16 + hexDigitValue(code); | 202 value = value * 16 + hexDigitValue(code); |
205 } | 203 } |
206 return value; | 204 return value; |
207 } | 205 } |
208 return code; | 206 return code; |
209 } | 207 } |
210 } | 208 } |
211 | 209 |
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