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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef TRACEIMPL_DEPENDENT_SCOPE_H_ |
| 6 #define TRACEIMPL_DEPENDENT_SCOPE_H_ |
| 7 |
| 8 #include "heap/stubs.h" |
| 9 |
| 10 namespace blink { |
| 11 |
| 12 class X : public GarbageCollected<X> { |
| 13 public: |
| 14 virtual void trace(Visitor*) {} |
| 15 }; |
| 16 |
| 17 template <typename T> |
| 18 class Base : public GarbageCollected<Base<T> > { |
| 19 public: |
| 20 virtual void trace(Visitor* visitor) { traceImpl(visitor); } |
| 21 virtual void trace(InlinedGlobalMarkingVisitor visitor) { |
| 22 traceImpl(visitor); |
| 23 } |
| 24 |
| 25 private: |
| 26 template <typename VisitorDispatcher> |
| 27 void traceImpl(VisitorDispatcher visitor) {} |
| 28 }; |
| 29 |
| 30 template <typename T> |
| 31 class Derived : public Base<T> { |
| 32 public: |
| 33 void trace(Visitor* visitor) override { traceImpl(visitor); } |
| 34 void trace(InlinedGlobalMarkingVisitor visitor) override { |
| 35 traceImpl(visitor); |
| 36 } |
| 37 |
| 38 private: |
| 39 template <typename VisitorDispatcher> |
| 40 void traceImpl(VisitorDispatcher visitor) { |
| 41 Base<T>::trace(visitor); |
| 42 } |
| 43 }; |
| 44 |
| 45 template <typename T> |
| 46 class DerivedMissingTrace : public Base<T> { |
| 47 public: |
| 48 void trace(Visitor* visitor) override { traceImpl(visitor); } |
| 49 void trace(InlinedGlobalMarkingVisitor visitor) override { |
| 50 traceImpl(visitor); |
| 51 } |
| 52 |
| 53 private: |
| 54 template <typename VisitorDispatcher> |
| 55 void traceImpl(VisitorDispatcher visitor) { |
| 56 // Missing Base<T>::trace(visitor). |
| 57 } |
| 58 }; |
| 59 |
| 60 } |
| 61 |
| 62 #endif // TRACEIMPL_DEPENDENT_SCOPE_H_ |
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