Introduce CodeBuffer as StringBuffer replacement in compiler.

lib/compiler/implementation/scanner/token.dart

 // Copyright (c) 2011, 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.
 
 final int EOF_TOKEN = 0;
 
 final int KEYWORD_TOKEN = $k;
 final int IDENTIFIER_TOKEN = $a;
 final int DOUBLE_TOKEN = $d;
 final int INT_TOKEN = $i;
@@ skipping 188 matching lines @@
   const StringWrapper(String this.stringValue);
 
   int hashCode() => stringValue.hashCode();
 
   bool operator ==(other) {
     return other is SourceString && toString() == other.slowToString();
   }
 
   Iterator<int> iterator() => new StringCodeIterator(stringValue);
 
-  void printOn(StringBuffer sb) {
+  void printOn(sb) {

[floitsch, 2012/07/12 16:29:09]

Couldn't you make the CodeBuffer implement StringBuffer?

[podivilov, 2012/07/13 12:49:57]

Done.

     sb.add(stringValue);
   }
 
   String toString() => stringValue;
 
   String slowToString() => stringValue;
 
   SourceString copyWithoutQuotes(int initial, int terminal) {
     assert(0 <= initial);
     assert(0 <= terminal);
@@ skipping 271 matching lines @@
 
 final PrecedenceInfo HEXADECIMAL_INFO =
   const PrecedenceInfo(const SourceString('hexadecimal'), 0, HEXADECIMAL_TOKEN);
 
 final PrecedenceInfo COMMENT_INFO =
   const PrecedenceInfo(const SourceString('comment'), 0, COMMENT_TOKEN);
 
 // For reporting lexical errors.
 final PrecedenceInfo ERROR_INFO =
   const PrecedenceInfo(const SourceString('?'), 0, UNKNOWN_TOKEN);