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_OVERLOADED_H_ 6 #define TRACEIMPL_OVERLOADED_H_ 7 8 #include "heap/stubs.h" 9 10 namespace blink { 11 12 class X : public GarbageCollected<X> { 13 public: Trace(Visitor *)14 void Trace(Visitor*) {} Trace(InlinedGlobalMarkingVisitor)15 void Trace(InlinedGlobalMarkingVisitor) {} 16 }; 17 18 class InlinedBase : public GarbageCollected<InlinedBase> { 19 public: Trace(Visitor * visitor)20 virtual void Trace(Visitor* visitor) { TraceImpl(visitor); } Trace(InlinedGlobalMarkingVisitor visitor)21 virtual void Trace(InlinedGlobalMarkingVisitor visitor) { 22 TraceImpl(visitor); 23 } 24 25 private: 26 template <typename VisitorDispatcher> TraceImpl(VisitorDispatcher visitor)27 void TraceImpl(VisitorDispatcher visitor) { visitor->Trace(x_base_); } 28 29 Member<X> x_base_; 30 }; 31 32 class InlinedDerived : public InlinedBase { 33 public: Trace(Visitor * visitor)34 void Trace(Visitor* visitor) override { TraceImpl(visitor); } Trace(InlinedGlobalMarkingVisitor visitor)35 void Trace(InlinedGlobalMarkingVisitor visitor) override { 36 TraceImpl(visitor); 37 } 38 39 private: 40 template <typename VisitorDispatcher> TraceImpl(VisitorDispatcher visitor)41 void TraceImpl(VisitorDispatcher visitor) { 42 visitor->Trace(x_derived_); 43 InlinedBase::Trace(visitor); 44 } 45 46 Member<X> x_derived_; 47 }; 48 49 class ExternBase : public GarbageCollected<ExternBase> { 50 public: 51 virtual void Trace(Visitor*); 52 virtual void Trace(InlinedGlobalMarkingVisitor); 53 54 private: 55 template <typename VisitorDispatcher> 56 void TraceImpl(VisitorDispatcher); 57 58 Member<X> x_base_; 59 }; 60 61 class ExternDerived : public ExternBase { 62 public: 63 void Trace(Visitor*) override; 64 void Trace(InlinedGlobalMarkingVisitor) override; 65 66 private: 67 template <typename VisitorDispatcher> 68 void TraceImpl(VisitorDispatcher); 69 70 Member<X> x_derived_; 71 }; 72 73 } 74 75 #endif // TRACEIMPL_OVERLOADED_H_ 76