tools/clang/blink_gc_plugin/tests/traceimpl_dependent_scope.h

   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_