Templatize AstVisitor with its subclass

src/full-codegen/full-codegen.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_FULL_CODEGEN_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_FULL_CODEGEN_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/bit-vector.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/compiler.h"
 #include "src/deoptimizer.h"
 #include "src/globals.h"
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class JumpPatchSite;
 
 // -----------------------------------------------------------------------------
 // Full code generator.
 
-class FullCodeGenerator: public AstVisitor {
+class FullCodeGenerator final : public AstVisitor<FullCodeGenerator> {
  public:
   FullCodeGenerator(MacroAssembler* masm, CompilationInfo* info)
       : masm_(masm),
         info_(info),
         isolate_(info->isolate()),
         zone_(info->zone()),
         scope_(info->scope()),
         nesting_stack_(NULL),
         loop_depth_(0),
         operand_stack_depth_(0),
@@ skipping 339 matching lines @@
     if (FLAG_verify_operand_stack_depth) EmitOperandStackDepthCheck();
     TestContext context(this, expr, if_true, if_false, fall_through);
     Visit(expr);
     // For test contexts, we prepare for bailout before branching, not at
     // the end of the entire expression.  This happens as part of visiting
     // the expression.
   }
 
   void VisitInDuplicateContext(Expression* expr);
 
-  void VisitDeclarations(ZoneList<Declaration*>* declarations) override;
+  void VisitDeclarations(ZoneList<Declaration*>* declarations);
   void DeclareGlobals(Handle<FixedArray> pairs);
   int DeclareGlobalsFlags();
 
   // Push, pop or drop values onto/from the operand stack.
   void PushOperand(Register reg);
   void PopOperand(Register reg);
   void DropOperands(int count);
 
   // Convenience helpers for pushing onto the operand stack.
   void PushOperand(MemOperand operand);
@@ skipping 329 matching lines @@
   // in v8::internal::Context.
   void LoadContextField(Register dst, int context_index);
 
   // Push the function argument for the runtime functions PushWithContext
   // and PushCatchContext.
   void PushFunctionArgumentForContextAllocation();
 
   void PushCalleeAndWithBaseObject(Call* expr);
 
   // AST node visit functions.
-#define DECLARE_VISIT(type) void Visit##type(type* node) override;
+#define DECLARE_VISIT(type) void Visit##type(type* node);
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
   void VisitComma(BinaryOperation* expr);
   void VisitLogicalExpression(BinaryOperation* expr);
   void VisitArithmeticExpression(BinaryOperation* expr);
 
   void VisitForTypeofValue(Expression* expr);
 
   void Generate();
@@ skipping 303 matching lines @@
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FULL_CODEGEN_FULL_CODEGEN_H_