Fraction class prototype and test (not to be committed).

runtime/vm/parser.h

 // 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.
 
 #ifndef VM_PARSER_H_
 #define VM_PARSER_H_
 
 #include "include/dart_api.h"
 
 #include "platform/assert.h"
@@ skipping 357 matching lines @@
   }
 
   void ComputeCurrentToken();
 
   RawLibraryPrefix* ParsePrefix();
 
   Token::Kind LookaheadToken(int num_tokens);
   String* CurrentLiteral() const;
   RawDouble* CurrentDoubleLiteral() const;
   RawInteger* CurrentIntegerLiteral() const;
+  RawFraction* CurrentRationalLiteral() const;
 
   // Sets parser to given token position in the stream.
   void SetPosition(TokenPosition position);
 
   void ConsumeToken() {
     // Reset cache and advance the token.
     prev_token_pos_ = tokens_iterator_.CurrentPosition();
     token_kind_ = Token::kILLEGAL;
     tokens_iterator_.Advance();
     INC_STAT(thread(), num_tokens_consumed, 1);
@@ skipping 578 matching lines @@
 
   intptr_t recursion_counter_;
   friend class RecursionChecker;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_