Add support for sync* and yield

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 327 matching lines @@
   }
   void ConsumeRightAngleBracket();
   void CheckToken(Token::Kind token_expected, const char* msg = NULL);
   void ExpectToken(Token::Kind token_expected);
   void ExpectSemicolon();
   void UnexpectedToken();
   String* ExpectUserDefinedTypeIdentifier(const char* msg);
   String* ExpectIdentifier(const char* msg);
   bool IsLiteral(const char* literal);
   bool IsAwaitKeyword();
+  bool IsYieldKeyword();
 
   void SkipIf(Token::Kind);
   void SkipBlock();
   intptr_t SkipMetadata();
   void SkipToMatchingParenthesis();
   void SkipTypeArguments();
   void SkipType(bool allow_void);
   void SkipInitializers();
   void SkipExpr();
   void SkipNestedExpr();
@@ skipping 193 matching lines @@
   void BuildDispatcherScope(const Function& func,
                             const ArgumentsDescriptor& desc,
                             Array* default_values);
 
   void ChainNewBlock(LocalScope* outer_scope);
   void OpenBlock();
   void OpenLoopBlock();
   void OpenFunctionBlock(const Function& func);
   void OpenAsyncClosure();
   RawFunction* OpenAsyncFunction(intptr_t formal_param_pos);
+  RawFunction* OpenSyncGeneratorFunction(intptr_t func_pos);
+  SequenceNode* CloseSyncGenFunction(const Function& closure,
+                                     SequenceNode* closure_node);
+  void AddSyncGenClosureParameters(ParamList* params);
   void OpenAsyncTryBlock();
   SequenceNode* CloseBlock();
   SequenceNode* CloseAsyncFunction(const Function& closure,
                                    SequenceNode* closure_node);
   SequenceNode* CloseAsyncClosure(SequenceNode* body);
   SequenceNode* CloseAsyncTryBlock(SequenceNode* try_block);
+  void AddAsyncClosureParameters(ParamList* params);
+  void AddContinuationVariables();
   void AddAsyncClosureVariables();
 
 
   LocalVariable* LookupPhaseParameter();
   LocalVariable* LookupReceiver(LocalScope* from_scope, bool test_only);
   LocalVariable* LookupTypeArgumentsParameter(LocalScope* from_scope,
                                               bool test_only);
   void CaptureInstantiator();
   AstNode* LoadReceiver(intptr_t token_pos);
   AstNode* LoadFieldIfUnresolved(AstNode* node);
@@ skipping 202 matching lines @@
   Script& script_;
   TokenStream::Iterator tokens_iterator_;
   Token::Kind token_kind_;  // Cached token kind for current token.
   Block* current_block_;
 
   // is_top_level_ is true if parsing the "top level" of a compilation unit,
   // that is class definitions, function type aliases, global functions,
   // global variables.
   bool is_top_level_;
 
-  // await_is_keyword_ is true if we are parsing an async function. In this
-  // context async is not treated as identifier but as a keyword.
+  // await_is_keyword_ is true if we are parsing an async or generator
+  // function. In this context the identifiers await, async and yield
+  // are treated as keywords.
   bool await_is_keyword_;
 
   // The member currently being parsed during "top level" parsing.
   MemberDesc* current_member_;
 
   // Parser mode to allow/disallow function literals. This is used in
   // constructor initializer expressions to handle ambiguous grammar.
   bool SetAllowFunctionLiterals(bool value);
   bool allow_function_literals_;
 
@@ skipping 29 matching lines @@
   bool unregister_pending_function_;
 
   LocalScope* async_temp_scope_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_