[strong] Stricter check for referring to other classes inside methods.

src/ast.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_AST_H_
 #define V8_AST_H_
 
 #include "src/v8.h"
 
 #include "src/assembler.h"
@@ skipping 552 matching lines @@
 class VariableDeclaration final : public Declaration {
  public:
   DECLARE_NODE_TYPE(VariableDeclaration)
 
   InitializationFlag initialization() const override {
     return mode() == VAR ? kCreatedInitialized : kNeedsInitialization;
   }
 
   bool is_class_declaration() const { return is_class_declaration_; }
 
+  // VariableDeclarations can be grouped into consecutive declaration
+  // groups. Each VariableDeclaration is associated with the start position of
+  // the group it belongs to. The positions are used for strong mode scope
+  // checks for classes and functions.
+  int declaration_group_start() const { return declaration_group_start_; }
+
  protected:
   VariableDeclaration(Zone* zone, VariableProxy* proxy, VariableMode mode,
-                      Scope* scope, int pos, bool is_class_declaration = false)
+                      Scope* scope, int pos, bool is_class_declaration = false,
+                      int declaration_group_start = -1)
       : Declaration(zone, proxy, mode, scope, pos),
-        is_class_declaration_(is_class_declaration) {}
+        is_class_declaration_(is_class_declaration),
+        declaration_group_start_(declaration_group_start) {}
 
   bool is_class_declaration_;
+  int declaration_group_start_;
 };
 
 
 class FunctionDeclaration final : public Declaration {
  public:
   DECLARE_NODE_TYPE(FunctionDeclaration)
 
   FunctionLiteral* fun() const { return fun_; }
   InitializationFlag initialization() const override {
     return kCreatedInitialized;
@@ skipping 2619 matching lines @@
 // AstNode factory
 
 class AstNodeFactory final BASE_EMBEDDED {
  public:
   explicit AstNodeFactory(AstValueFactory* ast_value_factory)
       : zone_(ast_value_factory->zone()),
         ast_value_factory_(ast_value_factory) {}
 
   VariableDeclaration* NewVariableDeclaration(
       VariableProxy* proxy, VariableMode mode, Scope* scope, int pos,
-      bool is_class_declaration = false) {
-    return new (zone_) VariableDeclaration(zone_, proxy, mode, scope, pos,
-                                           is_class_declaration);
+      bool is_class_declaration = false, int declaration_group_start = -1) {
+    return new (zone_)
+        VariableDeclaration(zone_, proxy, mode, scope, pos,
+                            is_class_declaration, declaration_group_start);
   }
 
   FunctionDeclaration* NewFunctionDeclaration(VariableProxy* proxy,
                                               VariableMode mode,
                                               FunctionLiteral* fun,
                                               Scope* scope,
                                               int pos) {
     return new (zone_) FunctionDeclaration(zone_, proxy, mode, fun, scope, pos);
   }
 
@@ skipping 348 matching lines @@
 
  private:
   Zone* zone_;
   AstValueFactory* ast_value_factory_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_