Inheritance

[GoogleCodeExporter]

What steps will reproduce the problem?
1. The problem comes from diamond inheritance but can be reproduced with
the following unit test :
class IBaseInterface
{
public:
    virtual int SimpleFunctionWithReturn() = 0;
};

class IInterface : public virtual IBaseInterface
{
public:
   // ...
};

TEST(MockObjectMethodSimpleWithReturn)
{
    TMockObject<IInterface> mock;
    mock.Method(&IInterface::SimpleFunctionWithReturn)
        .Will(22);
    CHECK_EQUAL(22, ((IInterface*)mock)->SimpleFunctionWithReturn());
}

=> It will failed

What is the expected output? 
To get a correct behaviour, I need to remove the virtual inheritance (not
what I want) or to change the IInterface declaration to (without changing
IBaseInterface of course) 
class IInterface : public virtual IBaseInterface
{
public:
     virtual int SimpleFunctionWithReturn() = 0;
};

What's wrong with this inheritance ? 
What I don't understand ?

What version of the product are you using? On what operating system?
I'm using gcc 3.4.6 20060404 (Red Hat 3.4.6-3)

Thank you for this great mock framework

Original issue reported on code.google.com by cedric.bresson@gmail.com on 27 Jun 2008 at 1:10