BUG: C1001 Error for More Than One Explicit Instantiation

• Microsoft Visual C++, 32-bit Editions, version 5.0

SYMPTOMS

The error C1001 is produced when more than one explicit instantiation of member template function is implemented. The compiler generates the following error message:

   test.cpp(13) : fatal error C1001: INTERNAL COMPILER ERROR
     (compiler file 'msc1.cpp', line 1188)
       Please choose the Technical Support command on the Visual C++
       Help menu, or open the Technical Support help file for more
       information

CAUSE

Member template implementation is not supported in this product.

RESOLUTION

Do not use explicit instantiation for class member template functions.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this bug and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Behavior

The following sample code produces the error message described in the SYMPTOMS section:

   // test.cpp
   #include <iostream.h>
   class A
   {
   public:
      template <class T> int getit(int i , T * it )
      {
         cout << "template getit\n" ;
         return i;
      }
   // explicit instantiations
   template  int getit(int i, double * it);

   template   int getit (int i, char * it);// C1001 error on this line
   };