Repeated prefixes and parser fixes.

dart/frog/leg/scanner/parser.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.
 
 /**
  * An event generating parser of Dart programs. This parser expects
  * all tokens in a linked list.
  */
 class Parser {
   final Listener listener;
@@ skipping 1360 matching lines @@
   Token parseVariablesDeclarationOrExpressionOpt(Token token) {
     final String value = token.stringValue;
     if (value === ';') {
       listener.handleNoExpression(token);
       return token;
     } else if ((value === 'var') || (value === 'final')) {
       return parseVariablesDeclarationNoSemicolon(token);
     }
     Token identifier = peekIdentifierAfterType(token);
     if (identifier !== null) {
-      assert(identifier.kind === IDENTIFIER_TOKEN);
+      assert(isIdentifier(identifier));
       Token afterId = identifier.next;
       int afterIdKind = afterId.kind;
       if (afterIdKind === EQ_TOKEN || afterIdKind === SEMICOLON_TOKEN ||
           afterIdKind === COMMA_TOKEN || optional('in', afterId)) {
         return parseVariablesDeclarationNoSemicolon(token);
       }
     }
     return parseExpression(token);
   }
 
@@ skipping 233 matching lines @@
     }
     listener.handleContinueStatement(hasTarget, continueKeyword, token);
     return expectSemicolon(token);
   }
 
   Token parseEmptyStatement(Token token) {
     listener.handleEmptyStatement(token);
     return expectSemicolon(token);
   }
 }