Q136594: FIX: Error Using Inline Assembly in a Template Class

Article: Q136594
Product(s): Microsoft C Compiler
Version(s): 2.0,2.1,2.2
Operating System(s): 
Keyword(s): kbCompiler kbCPPonly kbVCkbbuglist kbfixlist
Last Modified: 02-AUG-2001

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The information in this article applies to:

- Microsoft C/C++ Compiler (CL.EXE), used with:
   - *EDITOR Please do not choose this product*Microsoft Visual C++ 32-bit Edition* use 241, 265, 225, versions 2.0, 2.1, 2.2 
-------------------------------------------------------------------------------

SYMPTOMS
========

If inline assembly is used in an inline member function defined within a
templated class, the compiler generates these errors:

If the assembly instruction is of the form _asm { int 3 }:

  

      error C2304: '<template class instance> }' : unexpected tokens
                                                   following type
      fatal error C1004: unexpected end of file found.

If the assembly instruction is of the form _asm int 3:

  

      fatal error C1075: end of file found before the left <Unknown>
                         at <filename line number> was matched.

The type of error depends on whether the assembly instruction is enclosed in
braces or not.

NOTE: The same error occurs for macros like ASSERT and VERIFY, which expand to an
_asm {int 3} instruction.

RESOLUTION
==========

Define the member function outside the templated class using the "inline"
keyword.

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 Microsoft Visual C++,
32-bit Edition, version 4.0.

MORE INFORMATION
================

Sample Code to Reproduce Problem
--------------------------------

  /* Compile options needed: /Ob1 or /Ob2 for the workaround function
  /*                                      to be inline
  */ 

  template <class type>
  class myclass
  {
   public:
     void good_fun();
     void bad_fun() {
     _asm {int 3}      // This generates a compiler error.
     }
  };

  template <class type>
  inline void myclass<type>::good_fun() {
     _asm {int 3}      // This doesn't generate an error.
  }

  void main(void) {
     myclass<int> mytest;
  }

In this code, the good_fun() compiles without any error.

Additional query words: 2.00 2.10 2.20 9.00 9.10

======================================================================
Keywords          : kbCompiler kbCPPonly kbVC kbbuglist kbfixlist
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : :2.0,2.1,2.2
Issue type        : kbbug
Solution Type     : kbfix

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