Improve error recovery when using 'var' as a type

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/parser/Parser.java

 /*
  * Copyright (c) 2012, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
@@ skipping 4806 matching lines @@
    * Parse a type name.
    * 
    * <pre>
    * type ::=
    *     qualified typeArguments?
    * </pre>
    * 
    * @return the type name that was parsed
    */
   private TypeName parseTypeName() {
-    Identifier typeName = parsePrefixedIdentifier();
+    Identifier typeName;
+    if (matches(Keyword.VAR)) {
+      reportError(ParserErrorCode.VAR_AS_TYPE_NAME);
+      typeName = new SimpleIdentifier(getAndAdvance());
+    } else if (matchesIdentifier()) {
+      typeName = parsePrefixedIdentifier();
+    } else {
+      typeName = createSyntheticIdentifier();
+      reportError(ParserErrorCode.EXPECTED_TYPE_NAME);
+    }
     TypeArgumentList typeArguments = null;
     if (matches(TokenType.LT)) {
       typeArguments = parseTypeArgumentList();
     }
     return new TypeName(typeName, typeArguments);
   }
 
   /**
    * Parse a type parameter.
    * 
@@ skipping 1169 matching lines @@
       reportError(ParserErrorCode.EXTERNAL_TYPEDEF, modifiers.getExternalKeyword());
     }
     if (modifiers.getFinalKeyword() != null) {
       reportError(ParserErrorCode.FINAL_TYPEDEF, modifiers.getFinalKeyword());
     }
     if (modifiers.getVarKeyword() != null) {
       reportError(ParserErrorCode.VAR_TYPEDEF, modifiers.getVarKeyword());
     }
   }
 }