Q214619: FIX: Type Definition Is Not Inherited in Derived Template Class

Article: Q214619
Product(s): Microsoft C Compiler
Version(s): 6.0
Operating System(s): 
Keyword(s): kberrmsg kbCompiler kbCPPonly kbLangCPP kbVC600bug kbDSupport
Last Modified: 11-FEB-2002

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The information in this article applies to:

- Microsoft Visual C++, 32-bit Enterprise Edition, version 6.0 
- Microsoft Visual C++, 32-bit Professional Edition, version 6.0 
- Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
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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.

This problem was corrected in Microsoft Visual C++ .NET.

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 kbDSupport 
Technology        : kbVCsearch kbAudDeveloper kbVC600 kbVC32bitSearch
Version           : :6.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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