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1 // Copyright 2014 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 #include "trace_after_dispatch.h"
6 
7 namespace blink {
8 
toB(A * a)9 static B* toB(A* a) { return static_cast<B*>(a); }
10 
Trace(Visitor * visitor)11 void A::Trace(Visitor* visitor)
12 {
13     switch (m_type) {
14     case TB:
15         toB(this)->TraceAfterDispatch(visitor);
16         break;
17     case TC:
18         static_cast<C*>(this)->TraceAfterDispatch(visitor);
19         break;
20     case TD:
21         // Missing static_cast<D*>(this)->TraceAfterDispatch(visitor);
22         break;
23     }
24 }
25 
TraceAfterDispatch(Visitor * visitor)26 void A::TraceAfterDispatch(Visitor* visitor)
27 {
28 }
29 
TraceAfterDispatch(Visitor * visitor)30 void B::TraceAfterDispatch(Visitor* visitor)
31 {
32     visitor->Trace(m_a);
33     // Missing A::TraceAfterDispatch(visitor);
34     // Also check that calling Trace does not count.
35     A::Trace(visitor);
36 }
37 
TraceAfterDispatch(Visitor * visitor)38 void C::TraceAfterDispatch(Visitor* visitor)
39 {
40     // Missing visitor->Trace(m_a);
41     A::TraceAfterDispatch(visitor);
42 }
43 
TraceAfterDispatch(Visitor * visitor)44 void D::TraceAfterDispatch(Visitor* visitor)
45 {
46     visitor->Trace(m_a);
47     Abstract::TraceAfterDispatch(visitor);
48 }
49 
50 }
51