Implement async* functions in VM

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 523 matching lines @@
   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 AddAsyncGenClosureParameters(ParamList* params);
+
+  // Support for async* functions.
+  RawFunction* OpenAsyncGeneratorFunction(intptr_t func_pos);
+  SequenceNode* CloseAsyncGeneratorFunction(const Function& closure,
+                                            SequenceNode* closure_node);
+  void OpenAsyncGeneratorClosure();
+  SequenceNode* CloseAsyncGeneratorClosure(SequenceNode* body);
+
   void OpenAsyncTryBlock();
   SequenceNode* CloseBlock();
   SequenceNode* CloseAsyncFunction(const Function& closure,
                                    SequenceNode* closure_node);
+
   SequenceNode* CloseAsyncClosure(SequenceNode* body);
   SequenceNode* CloseAsyncTryBlock(SequenceNode* try_block);
+  SequenceNode* CloseAsyncGeneratorTryBlock(SequenceNode *body);
+
   void AddAsyncClosureParameters(ParamList* params);
   void AddContinuationVariables();
   void AddAsyncClosureVariables();
-
+  void AddAsyncGeneratorVariables();
 
   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);
   AstNode* LoadClosure(PrimaryNode* primary);
   AstNode* CallGetter(intptr_t token_pos, AstNode* object, const String& name);
@@ skipping 43 matching lines @@
   void AddFinallyBlockToNode(AstNode* node, InlinedFinallyNode* finally_node);
   AstNode* ParseTryStatement(String* label_name);
   RawAbstractType* ParseConstFinalVarOrType(
       ClassFinalizer::FinalizationKind finalization);
   AstNode* ParseVariableDeclaration(const AbstractType& type,
                                     bool is_final,
                                     bool is_const,
                                     SequenceNode** await_preamble);
   AstNode* ParseVariableDeclarationList();
   AstNode* ParseFunctionStatement(bool is_literal);
+  AstNode* ParseYieldStatement();
   AstNode* ParseStatement();
   SequenceNode* ParseNestedStatement(bool parsing_loop_body,
                                      SourceLabel* label);
   void ParseStatementSequence();
   bool IsIdentifier();
   bool IsSimpleLiteral(const AbstractType& type, Instance* value);
   bool IsFunctionTypeAliasName();
   bool IsMixinAppAlias();
   bool TryParseQualIdent();
   bool TryParseTypeParameters();
@@ skipping 197 matching lines @@
 
   // Indentation of parser trace.
   intptr_t trace_indent_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_