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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 // Check the validity of string literals. | 5 // Check the validity of string literals. |
6 | 6 |
7 library stringvalidator; | 7 library stringvalidator; |
8 | 8 |
9 import 'dart:collection'; | 9 import 'dart:collection'; |
10 | 10 |
11 import 'common.dart'; | 11 import 'common.dart'; |
12 import 'tokens/token.dart' show Token; | 12 import 'package:dart_scanner/dart_scanner.dart' show Token; |
13 import 'tree/dartstring.dart' show DartString; | 13 import 'tree/dartstring.dart' show DartString; |
14 import 'tree/nodes.dart' show StringQuoting; | 14 import 'tree/nodes.dart' show StringQuoting; |
15 import 'util/characters.dart'; | 15 import 'package:dart_scanner/src/characters.dart'; |
16 | 16 |
17 class StringValidator { | 17 class StringValidator { |
18 final DiagnosticReporter reporter; | 18 final DiagnosticReporter reporter; |
19 | 19 |
20 StringValidator(this.reporter); | 20 StringValidator(this.reporter); |
21 | 21 |
22 DartString validateInterpolationPart(Token token, StringQuoting quoting, | 22 DartString validateInterpolationPart(Token token, StringQuoting quoting, |
23 {bool isFirst: false, bool isLast: false}) { | 23 {bool isFirst: false, bool isLast: false}) { |
24 String source = token.value; | 24 String source = token.value; |
25 int leftQuote = 0; | 25 int leftQuote = 0; |
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93 */ | 93 */ |
94 String copyWithoutQuotes(String string, int initial, int terminal) { | 94 String copyWithoutQuotes(String string, int initial, int terminal) { |
95 assert(0 <= initial); | 95 assert(0 <= initial); |
96 assert(0 <= terminal); | 96 assert(0 <= terminal); |
97 assert(initial + terminal <= string.length); | 97 assert(initial + terminal <= string.length); |
98 return string.substring(initial, string.length - terminal); | 98 return string.substring(initial, string.length - terminal); |
99 } | 99 } |
100 | 100 |
101 void stringParseError(String message, Token token, int offset) { | 101 void stringParseError(String message, Token token, int offset) { |
102 reporter.reportErrorMessage( | 102 reporter.reportErrorMessage( |
103 token, MessageKind.GENERIC, {'text': "$message @ $offset"}); | 103 reporter.spanFromToken(token), MessageKind.GENERIC, |
| 104 {'text': "$message @ $offset"}); |
104 } | 105 } |
105 | 106 |
106 /** | 107 /** |
107 * Validates the escape sequences and special characters of a string literal. | 108 * Validates the escape sequences and special characters of a string literal. |
108 * Returns a DartString if valid, and null if not. | 109 * Returns a DartString if valid, and null if not. |
109 */ | 110 */ |
110 DartString validateString( | 111 DartString validateString( |
111 Token token, int startOffset, String string, StringQuoting quoting) { | 112 Token token, int startOffset, String string, StringQuoting quoting) { |
112 // We need to check for invalid x and u escapes, for line | 113 // We need to check for invalid x and u escapes, for line |
113 // terminators in non-multiline strings, and for invalid Unicode | 114 // terminators in non-multiline strings, and for invalid Unicode |
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205 } | 206 } |
206 } | 207 } |
207 // String literal successfully validated. | 208 // String literal successfully validated. |
208 if (quoting.raw || !containsEscape) { | 209 if (quoting.raw || !containsEscape) { |
209 // A string without escapes could just as well have been raw. | 210 // A string without escapes could just as well have been raw. |
210 return new DartString.rawString(string, length); | 211 return new DartString.rawString(string, length); |
211 } | 212 } |
212 return new DartString.escapedString(string, length); | 213 return new DartString.escapedString(string, length); |
213 } | 214 } |
214 } | 215 } |
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