Implicitly pass 'scope()' as parent scope for function scopes

src/parsing/preparser.cc

 // Copyright 2011 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.
 
 #include <cmath>
 
 #include "src/allocation.h"
 #include "src/base/logging.h"
 #include "src/conversions-inl.h"
 #include "src/conversions.h"
@@ skipping 118 matching lines @@
   parsing_module_ = parsing_module;
   log_ = log;
   use_counts_ = use_counts;
   // Lazy functions always have trivial outer scopes (no with/catch scopes).
   DCHECK_NULL(scope_state_);
   Scope* top_scope = NewScope(nullptr, SCRIPT_SCOPE);
   PreParserFactory top_factory(nullptr);
   FunctionState top_state(&function_state_, &scope_state_, top_scope,
                           kNormalFunction, &top_factory);
   scope()->SetLanguageMode(language_mode);
-  Scope* function_scope = NewFunctionScope(scope(), kind);
+  Scope* function_scope = NewFunctionScope(kind);
   if (!has_simple_parameters) function_scope->SetHasNonSimpleParameters();
   PreParserFactory function_factory(nullptr);
   FunctionState function_state(&function_state_, &scope_state_, function_scope,
                                kind, &function_factory);
   DCHECK_EQ(Token::LBRACE, scanner()->current_token());
   bool ok = true;
   int start_position = peek_position();
   ParseLazyFunctionLiteralBody(&ok, bookmark);
   use_counts_ = nullptr;
   if (bookmark && bookmark->HasBeenReset()) {
@@ skipping 954 matching lines @@
 PreParser::Expression PreParser::ParseFunctionLiteral(
     Identifier function_name, Scanner::Location function_name_location,
     FunctionNameValidity function_name_validity, FunctionKind kind,
     int function_token_pos, FunctionLiteral::FunctionType function_type,
     LanguageMode language_mode, bool* ok) {
   // Function ::
   //   '(' FormalParameterList? ')' '{' FunctionBody '}'
 
   // Parse function body.
   bool outer_is_script_scope = scope()->is_script_scope();
-  Scope* function_scope = NewFunctionScope(scope(), kind);
+  Scope* function_scope = NewFunctionScope(kind);
   function_scope->SetLanguageMode(language_mode);
   PreParserFactory factory(NULL);
   FunctionState function_state(&function_state_, &scope_state_, function_scope,
                                kind, &factory);
   DuplicateFinder duplicate_finder(scanner()->unicode_cache());
   ExpressionClassifier formals_classifier(this, &duplicate_finder);
 
   Expect(Token::LPAREN, CHECK_OK);
   int start_position = scanner()->location().beg_pos;
   function_scope->set_start_position(start_position);
@@ skipping 196 matching lines @@
 
   body->Add(PreParserStatement::ExpressionStatement(return_value), zone());
 }
 
 #undef CHECK_OK
 #undef CHECK_OK_CUSTOM
 
 
 }  // namespace internal
 }  // namespace v8