| // Copyright 2015 The Chromium 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 TRACEIMPL_DEPENDENT_SCOPE_H_ |
| #define TRACEIMPL_DEPENDENT_SCOPE_H_ |
| |
| #include "heap/stubs.h" |
| |
| namespace blink { |
| |
| class X : public GarbageCollected<X> { |
| public: |
| virtual void trace(Visitor*) {} |
| }; |
| |
| template <typename T> |
| class Base : public GarbageCollected<Base<T> > { |
| public: |
| virtual void trace(Visitor* visitor) { traceImpl(visitor); } |
| virtual void trace(InlinedGlobalMarkingVisitor visitor) { |
| traceImpl(visitor); |
| } |
| |
| private: |
| template <typename VisitorDispatcher> |
| void traceImpl(VisitorDispatcher visitor) {} |
| }; |
| |
| template <typename T> |
| class Derived : public Base<T> { |
| public: |
| void trace(Visitor* visitor) override { traceImpl(visitor); } |
| void trace(InlinedGlobalMarkingVisitor visitor) override { |
| traceImpl(visitor); |
| } |
| |
| private: |
| template <typename VisitorDispatcher> |
| void traceImpl(VisitorDispatcher visitor) { |
| Base<T>::trace(visitor); |
| } |
| }; |
| |
| template <typename T> |
| class DerivedMissingTrace : public Base<T> { |
| public: |
| void trace(Visitor* visitor) override { traceImpl(visitor); } |
| void trace(InlinedGlobalMarkingVisitor visitor) override { |
| traceImpl(visitor); |
| } |
| |
| private: |
| template <typename VisitorDispatcher> |
| void traceImpl(VisitorDispatcher visitor) { |
| // Missing Base<T>::trace(visitor). |
| } |
| }; |
| |
| } |
| |
| #endif // TRACEIMPL_DEPENDENT_SCOPE_H_ |