Separate Scope into DeclarationScope and Scope

src/parsing/preparser.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_PREPARSER_H
 #define V8_PARSING_PREPARSER_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/base/hashmap.h"
@@ skipping 556 matching lines @@
   // dummy method right in this class.
   PreParserFactory* visitor() { return this; }
   int* ast_properties() {
     static int dummy = 42;
     return &dummy;
   }
 };
 
 
 struct PreParserFormalParameters : FormalParametersBase {
-  explicit PreParserFormalParameters(Scope* scope)
+  explicit PreParserFormalParameters(DeclarationScope* scope)
       : FormalParametersBase(scope) {}
   int arity = 0;
 
   int Arity() const { return arity; }
   PreParserIdentifier at(int i) { return PreParserIdentifier(); }  // Dummy
 };
 
 
 class PreParser;
 
@@ skipping 325 matching lines @@
   static bool IsTaggedTemplate(const PreParserExpression tag) {
     return !tag.IsNoTemplateTag();
   }
 
   void AddFormalParameter(PreParserFormalParameters* parameters,
                           PreParserExpression pattern,
                           PreParserExpression initializer,
                           int initializer_end_position, bool is_rest) {
     ++parameters->arity;
   }
-  void DeclareFormalParameter(Scope* scope, PreParserIdentifier parameter,
+  void DeclareFormalParameter(DeclarationScope* scope,
+                              PreParserIdentifier parameter,
                               Type::ExpressionClassifier* classifier) {
     if (!classifier->is_simple_parameter_list()) {
       scope->SetHasNonSimpleParameters();
     }
   }
 
   void CheckConflictingVarDeclarations(Scope* scope, bool* ok) {}
 
   // Temporary glue; these functions will move to ParserBase.
   PreParserExpression ParseV8Intrinsic(bool* ok);
@@ skipping 104 matching lines @@
   // captured the syntax error), and false if a stack-overflow happened
   // during parsing.
   PreParseResult PreParseProgram(int* materialized_literals = 0,
                                  bool is_module = false) {
     DCHECK_NULL(scope_state_);
     Scope* scope = NewScriptScope();
 
     // ModuleDeclarationInstantiation for Source Text Module Records creates a
     // new Module Environment Record whose outer lexical environment record is
     // the global scope.
-    if (is_module) {
-      scope = NewScopeWithParent(scope, MODULE_SCOPE);
-    }
+    if (is_module) scope = NewModuleScope(scope);
 
     FunctionState top_scope(&function_state_, &scope_state_, scope,
                             kNormalFunction);
     bool ok = true;
     int start_position = scanner()->peek_location().beg_pos;
     parsing_module_ = is_module;
     ParseStatementList(Token::EOS, &ok);
     if (stack_overflow()) return kPreParseStackOverflow;
     if (!ok) {
       ReportUnexpectedToken(scanner()->current_token());
@@ skipping 204 matching lines @@
     const PreParserFormalParameters& parameters, FunctionKind kind,
     FunctionLiteral::FunctionType function_type, bool* ok) {
   return pre_parser_->ParseEagerFunctionBody(function_name, pos, parameters,
                                              kind, function_type, ok);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PREPARSER_H