FIX: Class-local typedef Causes C1001 in msc1.cpp, Line 1089

• The C/C++ Compiler (CL.EXE) included with: - Microsoft Visual C++, 32-bit Editions, versions 4.0, 4.1, 4.2

SYMPTOMS

When you try to use a typedef class name defined local to another class, the following internal compiler error occurs:

    C:\code\cust2\Test.cpp(20) : fatal error C1001: INTERNAL COMPILER
    ERROR (compiler file 'msc1.cpp', line 1089) Please choose the
    Technical Support command on the Visual C++ Help menu, or open
    the Technical Support help file for more information

RESOLUTION

Declare the typedef statement outside class scope to resolve this problem.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug was corrected in Visual C++ version 5.0.

MORE INFORMATION

Sample Code

    /* Compile options needed: none
    */

    class Alpha_Helper
    {
       int x;
    };

    class Alpha
    {
       public:
          typedef Alpha_Helper Helper;

    };

    class Beta : public Alpha::Helper
    {
       int b;
    };

Keywords          : CPPIss vcbuglist420 vcfixlist500 kbcode kbtool
Version           : 4.0 4.1 4.2
Platform          : NT WINDOWS
Issue type        : kbbug
Solution Type     : kbfix