Remove deprecated string features.

utils/peg/pegparser.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.
 
 library Peg Parser;
 
 /*
  * The following functions are combinators for building Rules.
  *
  * A rule is one of the following
@@ skipping 44 matching lines @@
  * CHAR does not generate a value.
  */
 _Rule CHAR([characters]) {
   if (characters == null)
     return const _AnyCharRule();
   if (characters is int)
     return CHARCODE(characters);
 
   // Find the range of character codes and construct an array of flags for codes
   // within the range.
-  List<int> codes = characters.charCodes;
+  List<int> codes = characters.codeUnits;
   codes.sort((a, b) => a < b ? -1 : a > b ? 1 : 0);
   int lo = codes[0];
   int hi = codes[codes.length - 1];
   if (lo == hi)
     return CHARCODE(lo);
   int len = hi - lo + 1;
   var flags = new List<bool>.fixedLength(len);
   for (int i = 0; i < len; ++i)
     flags[i] = false;
   for (int code in codes)
@@ skipping 369 matching lines @@
   toString() => 'ERROR($message)';
 }
 
 class _CharCodeRule extends _Rule {
   Function _predicate;
   var _name;
   _CharCodeRule(this._predicate, this._name);
   _match(_ParserState state, int pos) {
     if (pos == state._end)
       return null;
-    int code = state._text.charCodeAt(pos);
+    int code = state._text.codeUnitAt(pos);
     if (_predicate(code))
       return [pos + 1, null];
     return null;
   }
 
   toString() => _name == null ? 'CHARCODE($_predicate)' : 'CHARCODE($_name)';
 }
 
 class _AnyCharRule extends _Rule {
   const _AnyCharRule();
@@ skipping 38 matching lines @@
   final String _string;
   int _len;
   _StringRule(this._string) {
     _len = _string.length;
   }
 
   _match(_ParserState state, int pos) {
     if (pos + _len > state._end)
       return null;
     for (int i = 0; i < _len; i++) {
-      if (state._text.charCodeAt(pos + i) != _string.charCodeAt(i))
+      if (state._text.codeUnitAt(pos + i) != _string.codeUnitAt(i))
         return null;
     }
     return [pos + _len, null];
   }
 
   //get defaultValue => _string;
 
   toString() => '"$_string"';
 
   description() => "'$_string'";
@@ skipping 324 matching lines @@
   add(s);
   add(t);
   add(u);
   add(v);
   add(w);
   add(x);
   add(y);
   add(z);
   return list;
 }