The Tor Browser / file revision

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.

 // Use of this source code is governed by a BSD-style license that can be

 // found in the LICENSE file.

 #include "virtual_methods.h"

 // Shouldn't warn about method usage in the implementation file.

 class VirtualMethodsInImplementation {

  public:

   virtual void MethodIsAbstract() = 0;

   virtual void MethodHasNoArguments();

   virtual void MethodHasEmptyDefaultImpl() {}

   virtual bool ComplainAboutThis() { return true; }

 };

 // Stubs to fill in the abstract method

 class ConcreteVirtualMethodsInHeaders : public VirtualMethodsInHeaders {

  public:

   virtual void MethodIsAbstract() override {}

 };

 class ConcreteVirtualMethodsInImplementation

     : public VirtualMethodsInImplementation {

  public:

   virtual void MethodIsAbstract() override {}

 };

 // Fill in the implementations

 void VirtualMethodsInHeaders::MethodHasNoArguments() {}

 void WarnOnMissingVirtual::MethodHasNoArguments() {}

 void VirtualMethodsInImplementation::MethodHasNoArguments() {}

 int main() {

   ConcreteVirtualMethodsInHeaders one;

   ConcreteVirtualMethodsInImplementation two;

 }