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Side by Side Diff: utils/css/parser.dart

Issue 11361190: a === b -> identical(a, b) (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Address comments. Created 8 years, 1 month ago
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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2011, 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 3
4 /** 4 /**
5 * A simple recursive descent parser for CSS. 5 * A simple recursive descent parser for CSS.
6 */ 6 */
7 class Parser { 7 class Parser {
8 Tokenizer tokenizer; 8 Tokenizer tokenizer;
9 9
10 var _fs; // If non-null filesystem to read files. 10 var _fs; // If non-null filesystem to read files.
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129 var message; 129 var message;
130 try { 130 try {
131 message = 'expected $expected, but found $tok'; 131 message = 'expected $expected, but found $tok';
132 } catch (e) { 132 } catch (e) {
133 message = 'parsing error expected $expected'; 133 message = 'parsing error expected $expected';
134 } 134 }
135 _error(message, tok.span); 135 _error(message, tok.span);
136 } 136 }
137 137
138 void _error(String message, [SourceSpan location=null]) { 138 void _error(String message, [SourceSpan location=null]) {
139 if (location === null) { 139 if (location == null) {
140 location = _peekToken.span; 140 location = _peekToken.span;
141 } 141 }
142 142
143 if (_erroMsgRedirector == null) { 143 if (_erroMsgRedirector == null) {
144 world.fatal(message, location); // syntax errors are fatal for now 144 world.fatal(message, location); // syntax errors are fatal for now
145 } else { 145 } else {
146 String text = ""; 146 String text = "";
147 if (location != null) { 147 if (location != null) {
148 text = location.toMessageString(""); 148 text = location.toMessageString("");
149 } 149 }
150 _erroMsgRedirector.displayError("CSS error: \r${text}\r${message}"); 150 _erroMsgRedirector.displayError("CSS error: \r${text}\r${message}");
151 } 151 }
152 } 152 }
153 153
154 void _warning(String message, [SourceSpan location=null]) { 154 void _warning(String message, [SourceSpan location=null]) {
155 if (location === null) { 155 if (location == null) {
156 location = _peekToken.span; 156 location = _peekToken.span;
157 } 157 }
158 158
159 world.warning(message, location); 159 world.warning(message, location);
160 } 160 }
161 161
162 SourceSpan _makeSpan(int start) { 162 SourceSpan _makeSpan(int start) {
163 return new SourceSpan(source, start, _previousToken.end); 163 return new SourceSpan(source, start, _previousToken.end);
164 } 164 }
165 165
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1008 1008
1009 return result; 1009 return result;
1010 } 1010 }
1011 } 1011 }
1012 1012
1013 /** Not a hex number. */ 1013 /** Not a hex number. */
1014 class HexNumberException implements Exception { 1014 class HexNumberException implements Exception {
1015 HexNumberException(); 1015 HexNumberException();
1016 } 1016 }
1017 1017
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