Preparation for reporting an error for deprecated raw strings (issue 4815)

compiler/java/com/google/dart/compiler/parser/DartScanner.java

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 package com.google.dart.compiler.parser;
 
+import com.google.dart.compiler.DartCompilerListener;
+import com.google.dart.compiler.Source;
 import com.google.dart.compiler.metrics.DartEventType;
 import com.google.dart.compiler.metrics.Tracer;
 import com.google.dart.compiler.metrics.Tracer.TraceEvent;
 import com.google.dart.compiler.parser.DartScanner.InternalState.Mode;
 
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Stack;
 
 /**
@@ skipping 363 matching lines @@
 
   private static boolean isWhiteSpace(int c) {
     return c == ' ' || c == '\t';
   }
 
   private int commentCharCount;
   private int lastCommentStart;
   private int lastCommentStop;
   private String source;
   private InternalState internalState;
+  private Source sourceReference;
+  private DartCompilerListener listener;
 
   public DartScanner(String source) {
-    this(source, 0);
+    this(source, 0, null, null);
   }
 
   public DartScanner(String source, int start) {
+    this(source, 0, null, null);
+  }
+
+  public DartScanner(String source, int start, Source sourceReference, DartCompilerListener listener) {
     final TraceEvent logEvent = Tracer.canTrace() ? Tracer.start(DartEventType.SCANNER) : null;
     try {
       this.source = source;
+      this.sourceReference = sourceReference;
+      this.listener = listener;
       internalState = new InternalState();
       internalState.tokens = new ArrayList<TokenData>(source.length()/2);
 
       // Initialize lookahead positions.
       // TODO Determine if line & column should be relative to 0 or 'start'
       internalState.nextLookaheadPos = start;
       for (int i = 0; i < internalState.lookaheadPos.length; ++i) {
         internalState.lookaheadPos[i] = start;
       }
 
@@ skipping 789 matching lines @@
             return select(Token.TRUNC);
           }
         } else {
           return Token.BIT_NOT;
         }
 
       case '@':
         // Raw strings.
         advance();
         if (is('\'') || is('"')) {
-          boolean isRaw = true;
-          return scanString(isRaw);
+//          int offset = position() - 1;
+          Token token = scanString(true);
+//          if (listener != null) {
+//            listener.onError(new DartCompilationError(
+//                new SourceInfo(sourceReference, offset, position() - offset),
+//                ParserErrorCode.DEPRECATED_RAW_STRING));
+//          }
+          return token;
         } else {
           return Token.AT;
         }
 
       case '#':
         return scanDirective();
 
       case 'r':
         if (lookahead(1) == '\'' || lookahead(1) == '"') {
           advance();
@@ skipping 118 matching lines @@
     while (true) {
       int c = lookahead(0);
       if (isLineTerminator(c)) {
       } else if (!isWhiteSpace(c)) {
         break;
       }
       advance();
     }
   }
 }