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Q130546: FIX: C2227 & C2653 on Explicit Destructor Call in Template

Article: Q130546
Product(s): Microsoft C Compiler
Version(s): 2.0,2.1
Operating System(s): 
Keyword(s): kbCompiler kbCPPonly kbVC kbVC400fix
Last Modified: 25-JUL-2001

-------------------------------------------------------------------------------
The information in this article applies to:

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

SYMPTOMS
========

Compiling a program that includes a class template that makes an explicit
reference to the destructor of the template argument <type_name> generates
the following errors if the class template is instantiated with a simple type:

  error C2227: left of '->type_name' must point to class/struct/union
  error C2653: 'type_name' : is not a class name

RESOLUTION
==========

The Annotated C++ Reference Manual (Jan '94), section 12.4 contains the
following example:

     int* p;
     / ...
     p->int::~int();

But this syntax is not supported by Visual C++, even through a typeddef or
template type. The only workaround is to remove the explicit call to the
destructor.

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 4.0.

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

Sample Code to Demonstrate Problem
----------------------------------

     // Compile options needed: none
     template<class Item>
     class classX {
        public:
        void funcX();
        Item* cpR;
     };

     template<class Item>
     void classX<Item>::funcX() {
        cpR->Item::~Item();
     };

     template classX<int>;

REFERENCES
==========

For more information, please see the following articles in the Microsoft
Knowledge Base:

  Q129132 BUG: Can't Use Simple Type in Explicit Call of a Destructor

  Q130547 BUG: C2300 on Explicit Destructor Call in Class Template

Additional query words: 9.00 9.10 Intrinsic

======================================================================
Keywords          : kbCompiler kbCPPonly kbVC kbVC400fix 
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : :2.0,2.1
Issue type        : kbbug
Solution Type     : kbfix

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