[parser] Refactor bookmark in SkipLazyFunctionBody

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 492 matching lines @@
 
   Statement* BuildAssertIsCoercible(Variable* var);
 
   // Factory methods.
   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 bookmark is set, the (pre-)parser may decide to abort skipping
+  // If may_abort == true, the (pre-)parser may decide to abort skipping
   // in order to force the function to be eagerly parsed, after all.
-  // In this case, it'll reset the scanner using the bookmark.
-  void SkipLazyFunctionBody(int* materialized_literal_count,
-                            int* expected_property_count, bool* ok,
-                            Scanner::BookmarkScope* bookmark = nullptr);
+  LazyParsingResult SkipLazyFunctionBody(int* materialized_literal_count,
+                                         int* expected_property_count,
+                                         bool may_abort, bool* ok);
 
   PreParser::PreParseResult ParseLazyFunctionBodyWithPreParser(
-      SingletonLogger* logger, Scanner::BookmarkScope* bookmark = nullptr);
+      SingletonLogger* logger, 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 309 matching lines @@
   V8_INLINE static FunctionLiteral* EmptyFunctionLiteral() { return nullptr; }
 
   V8_INLINE static bool IsEmptyExpression(Expression* expr) {
     return expr == nullptr;
   }
 
   // Used in error return values.
   V8_INLINE static ZoneList<Expression*>* NullExpressionList() {
     return nullptr;
   }
+  V8_INLINE static ZoneList<Statement*>* NullStatementList() { return nullptr; }
 
   // Non-NULL empty string.
   V8_INLINE const AstRawString* EmptyIdentifierString() const {
     return ast_value_factory()->empty_string();
   }
 
   // Odd-ball literal creators.
   V8_INLINE Literal* GetLiteralTheHole(int position) {
     return factory()->NewTheHoleLiteral(kNoSourcePosition);
   }
@@ skipping 188 matching lines @@
   static const int kLiteralTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_H_