FIX: C2955 Caused by the "using" Declaration

• The C Run-Time (CRT), included with:
  • Microsoft Visual C++, 32-bit Editions, version 5.0

SYMPTOMS

If you try to use the "using" declaration on a template class defined in a namespace, the following error message appears:

error C2955: 'identifier' : use of class template requires template argument list

RESOLUTION

Use the using directive instead of the using declaration.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been corrected in Visual Studio 97 Service Pack 1.

For additional information about the Visual Studio 97 Service Pack 1, please see the following article in the Microsoft Knowledge Base:

Q170365 INFO: Visual Studio 97 Service Packs - What, Where, and Why

MORE INFORMATION

The using declaration introduces a name into the declarative region in which the using declaration appears. It allows an individual name from a specific namespace to be used without explicit qualification. The using directive allows all the names in a namespace to be used without qualification.

The following sample demonstrates the problem and the workaround.

Sample Code

    /* Compiler Options: /GX */ 

    #include <list>

    //#define WORKAROUND //Uncomment this line to workaround

    #ifndef WORKAROUND
    using std::list ; //C2955 here
    #else
    using namespace std ;
    #endif

    int main()
    {
   list<int> li ;
   return 0 ;
    } 

REFERENCES

TITLE: using Declaration
URL: mk:@ivt:vccore/F3C/D3E/S4C3C5.HTM

TITLE: using Directive
URL: mk:@ivt:vccore/F3C/D3E/S4C3C6.HTM

Additional query words:

Keywords : kbcode kberrmsg kbtool kbCompiler kbCPPonly kbLangCPP kbVC kbVC500bug kbVS97sp1fix STLIss
Version : 5.0
Platform : NT WINDOWS
Issue type : kbbug