FIX: C1001 Including Header File in Template Class Definition (146000)

The information in this article applies to:

Microsoft Visual C++, 32-bit Professional Edition 4.0
Microsoft Visual C++, 32-bit Professional Edition 4.1
Microsoft Visual C++, 32-bit Learning Edition 4.0

This article was previously published under Q146000

SYMPTOMS

If you use the #include preprocessor directive in a template class definition, the following internal compiler error may be generated:

fatal error C1001: INTERNAL COMPILER ERROR
(compiler file 'msc1.cpp', line 899)
Please choose the Technical Support command on the Visual C++
Help menu, or open the Technical Support help file for more information

RESOLUTION

Do not use #include directive in a template class definition.

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++, 32-bit Edition, version 4.2.

MORE INFORMATION

Sample Code

// Compile Options - none

//test.cpp

template <class T> class TestClass {
public:
  #include "test.h" // this line generates the C1001 error

};

TestClass<char> ClassInst;

//end test.cpp

//test.h
#define TEST 1

//end test.h

Modification Type:	Minor	Last Reviewed:	7/5/2005
Keywords:	kbbug kbCompiler kbCPPonly kbfix KB146000