Preparse inner functions.

src/parsing/parser.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSING_PARSER_H_
 #define V8_PARSING_PARSER_H_
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/parsing/parser-base.h"
@@ skipping 448 matching lines @@
   FunctionLiteral* DefaultConstructor(const AstRawString* name, bool call_super,
                                       int pos, int end_pos,
                                       LanguageMode language_mode);
 
   // Skip over a lazy function, either using cached data if we have it, or
   // by parsing the function with PreParser. Consumes the ending }.
   // If may_abort == true, the (pre-)parser may decide to abort skipping
   // in order to force the function to be eagerly parsed, after all.
   LazyParsingResult SkipLazyFunctionBody(int* materialized_literal_count,
                                          int* expected_property_count,
-                                         bool may_abort, bool* ok);
+                                         bool is_inner_function, bool may_abort,
+                                         bool* ok);
 
   PreParser::PreParseResult ParseLazyFunctionBodyWithPreParser(
-      SingletonLogger* logger, bool may_abort);
+      SingletonLogger* logger, bool is_inner_function, bool may_abort);
 
   Block* BuildParameterInitializationBlock(
       const ParserFormalParameters& parameters, bool* ok);
   Block* BuildRejectPromiseOnException(Block* block, bool* ok);
 
   // Consumes the ending }.
   ZoneList<Statement*>* ParseEagerFunctionBody(
       const AstRawString* function_name, int pos,
       const ParserFormalParameters& parameters, FunctionKind kind,
       FunctionLiteral::FunctionType function_type, bool* ok);
@@ skipping 559 matching lines @@
 
   V8_INLINE ZoneList<Expression*>* GetNonPatternList() const {
     return function_state_->non_patterns_to_rewrite();
   }
 
   V8_INLINE void CountUsage(v8::Isolate::UseCounterFeature feature) {
     ++use_counts_[feature];
   }
 
   // Parser's private field members.
+  friend class DiscardableZoneScope;

[vogelheim, 2016/09/16 08:13:04]

Why?

[marja, 2016/09/16 08:38:16]

Because of reusable_preparser_

 
   Scanner scanner_;
   PreParser* reusable_preparser_;
   Scope* original_scope_;  // for ES5 function declarations in sloppy eval
 
   friend class ParserTarget;
   friend class ParserTargetScope;
   ParserTarget* target_stack_;  // for break, continue statements
 
   ScriptCompiler::CompileOptions compile_options_;
@@ skipping 11 matching lines @@
 
 #ifdef DEBUG
   void Print(AstNode* node);
 #endif  // DEBUG
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_H_