1 // Copyright (c) 2011 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 VIRTUAL_METHODS_H_
6 #define VIRTUAL_METHODS_H_
7 
8 // Note: This is not actual windows.h but the stub file in system/windows.h
9 #include <windows.h>
10 
11 #define CR_BEGIN_MSG_MAP_EX(theClass) virtual int f() { return 4; }
12 #define BEGIN_SAFE_MSG_MAP_EX(theClass) virtual int g() { return 4; }
13 
14 // Should warn about virtual method usage.
15 class VirtualMethodsInHeaders {
16  public:
17   // Don't complain about these.
18   virtual void MethodIsAbstract() = 0;
19   virtual void MethodHasNoArguments();
MethodHasEmptyDefaultImpl()20   virtual void MethodHasEmptyDefaultImpl() {}
21 
22   // But complain about this:
ComplainAboutThis()23   virtual bool ComplainAboutThis() { return true; }
24 
25   SYSTEM_INLINE_VIRTUAL
26   CR_BEGIN_MSG_MAP_EX(Sub)
27   BEGIN_SAFE_MSG_MAP_EX(Sub)
28 };
29 
30 // Complain on missing 'virtual' keyword in overrides.
31 class WarnOnMissingVirtual : public VirtualMethodsInHeaders {
32  public:
33   void MethodHasNoArguments() override;
34 };
35 
36 // Don't complain about things in a 'testing' namespace.
37 namespace testing {
38 struct TestStruct {};
39 }  // namespace testing
40 
41 class VirtualMethodsInHeadersTesting : public VirtualMethodsInHeaders {
42  public:
43   // Don't complain about no virtual testing methods.
44   void MethodHasNoArguments();
45 
46  private:
47   testing::TestStruct tester_;
48 };
49 
50 #endif  // VIRTUAL_METHODS_H_
51