Implement handling of arrow functions in the parser

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 216ee66e2985dddbd4346d9e3b2831fd48bbab6c..30a9f327df899e7ae068d6387d213c04d1f817e1 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -413,9 +413,15 @@ class ParserTraits {
 
     // Used by FunctionState and BlockState.
     typedef v8::internal::Scope Scope;
+    typedef v8::internal::Scope* ScopePtr;
     typedef Variable GeneratorVariable;
     typedef v8::internal::Zone Zone;
 
+    typedef v8::internal::AstProperties AstProperties;
+    typedef v8::internal::DeferredFeedbackSlotProcessor
+        DeferredFeedbackSlotProcessor;
+    typedef Vector<VariableProxy*> ParameterIdentifierVector;
+
     // Return types for traversing functions.
     typedef Handle<String> Identifier;
     typedef v8::internal::Expression* Expression;
@@ -425,6 +431,7 @@ class ParserTraits {
     typedef ObjectLiteral::Property* ObjectLiteralProperty;
     typedef ZoneList<v8::internal::Expression*>* ExpressionList;
     typedef ZoneList<ObjectLiteral::Property*>* PropertyList;
+    typedef ZoneList<v8::internal::Statement*>* StatementList;
 
     // For constructing objects returned by the traversing functions.
     typedef AstNodeFactory<AstConstructionVisitor> Factory;
@@ -474,6 +481,10 @@ class ParserTraits {
     fni->PushLiteralName(id);
   }
   void PushPropertyName(FuncNameInferrer* fni, Expression* expression);
+  static void InferFunctionName(FuncNameInferrer* fni,
+                                FunctionLiteral* func_to_infer) {
+    fni->AddFunction(func_to_infer);
+  }
 
   static void CheckFunctionLiteralInsideTopLevelObjectLiteral(
       Scope* scope, Expression* value, bool* has_function) {
@@ -562,11 +573,15 @@ class ParserTraits {
   static Literal* EmptyLiteral() {
     return NULL;
   }
+
   // Used in error return values.
   static ZoneList<Expression*>* NullExpressionList() {
     return NULL;
   }
 
+  // Non-"null" empty string.
+  V8_INLINE Handle<String> EmptyIdentifierString();
+
   // Odd-ball literal creators.
   Literal* GetLiteralTheHole(int position,
                              AstNodeFactory<AstConstructionVisitor>* factory);
@@ -576,7 +591,8 @@ class ParserTraits {
   Handle<String> NextLiteralString(Scanner* scanner,
                                    PretenureFlag tenured);
   Expression* ThisExpression(Scope* scope,
-                             AstNodeFactory<AstConstructionVisitor>* factory);
+                             AstNodeFactory<AstConstructionVisitor>* factory,
+                             int pos = RelocInfo::kNoPosition);
   Literal* ExpressionFromLiteral(
       Token::Value token, int pos, Scanner* scanner,
       AstNodeFactory<AstConstructionVisitor>* factory);
@@ -592,6 +608,15 @@ class ParserTraits {
   ZoneList<ObjectLiteral::Property*>* NewPropertyList(int size, Zone* zone) {
     return new(zone) ZoneList<ObjectLiteral::Property*>(size, zone);
   }
+  ZoneList<v8::internal::Statement*>* NewStatementList(int size, Zone* zone) {
+    return new(zone) ZoneList<v8::internal::Statement*>(size, zone);
+  }
+  V8_INLINE Scope* NewScope(Scope* parent_scope, ScopeType scope_type);
+
+  // Utility functions
+  Vector<VariableProxy*> ParameterListFromExpression(
+      Expression* expression, bool* ok);
+  void InferFunctionName(FunctionLiteral* func_to_infer);
 
   // Temporary glue; these functions will move to ParserBase.
   Expression* ParseV8Intrinsic(bool* ok);
@@ -603,6 +628,21 @@ class ParserTraits {
       int function_token_position,
       FunctionLiteral::FunctionType type,
       bool* ok);
+  V8_INLINE void SkipLazyFunctionBody(
+      Handle<String> function_name,
+      int* materialized_literal_count,
+      int* expected_property_count,
+      bool* ok);
+  V8_INLINE ZoneList<Statement*>* ParseEagerFunctionBody(
+      Handle<String> function_name,
+      int pos,
+      Variable* fvar,
+      Token::Value fvar_init_op,
+      bool is_generator,
+      bool* ok);
+  V8_INLINE void CheckConflictingVarDeclarations(
+      v8::internal::Scope* scope,
+      bool* ok);
 
  private:
   Parser* parser_;
@@ -784,6 +824,9 @@ class Parser : public ParserBase<ParserTraits> {
 
   void RegisterTargetUse(Label* target, Target* stop);
 
+  Vector<VariableProxy*> ParameterListFromExpression(Expression* expression,
+                                                     bool* ok);
+
   // Factory methods.
 
   Scope* NewScope(Scope* parent, ScopeType type);
@@ -823,6 +866,42 @@ class Parser : public ParserBase<ParserTraits> {
 };
 
 
+Scope* ParserTraits::NewScope(Scope* parent_scope, ScopeType scope_type) {
+  return parser_->NewScope(parent_scope, scope_type);
+}
+
+
+Handle<String> ParserTraits::EmptyIdentifierString() {
+  return parser_->isolate()->factory()->empty_string();
+}
+
+
+void ParserTraits::SkipLazyFunctionBody(
+    Handle<String> function_name,
+    int* materialized_literal_count,
+    int* expected_property_count,
+    bool* ok) {
+  return parser_->SkipLazyFunctionBody(function_name,
+      materialized_literal_count, expected_property_count, ok);
+}
+
+
+ZoneList<Statement*>* ParserTraits::ParseEagerFunctionBody(
+    Handle<String> function_name,
+    int pos,
+    Variable* fvar,
+    Token::Value fvar_init_op,
+    bool is_generator,
+    bool* ok) {
+  return parser_->ParseEagerFunctionBody(function_name, pos,
+      fvar, fvar_init_op, is_generator, ok);
+}
+
+void ParserTraits::CheckConflictingVarDeclarations(
+    v8::internal::Scope* scope, bool* ok) {
+  parser_->CheckConflictingVarDeclarations(scope, ok);
+}
+
 // Support for handling complex values (array and object literals) that
 // can be fully handled at compile time.
 class CompileTimeValue: public AllStatic {