BUG: Type Definition Is Not Inherited in Derived Template Class

• Microsoft Visual C++, 32-bit Editions, version 6.0

SYMPTOMS

When you compile a template class that references a type that is defined in a base template class, the following error message might appear:

error C2653: '<type-name>' : is not a class or namespace name

RESOLUTION

To work around this problem, reimplement the typedef down the hierarchy of derived classes.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.

MORE INFORMATION

The following sample code reproduces the behavior:

Compile options needed: None.

template <class T>
struct A 
{
    typedef int MyIntA;
};

template <class T>
struct B 
{
    typedef A<T> ATempl;
};

template <class T>
struct C : public B<T> 
{
    // Uncomment the following line for the workaround.
    // typedef A<T> ATempl; 
};

template <class T>
struct D: public C< A<T> > 
{
    typedef typename ATempl::MyIntA MyIntD; // Does not inherit from 
                                            // class B.
}; 

Additional query words:

Keywords : kberrmsg kbCompiler kbCPPonly kbLangCPP kbVC600bug
Version : winnt:6.0
Platform : winnt
Issue type : kbbug