Re: Need help with templates and VC6

From:

David Wilkinson <no-reply@effisols.com>

Newsgroups:

microsoft.public.vc.language

Date:

Thu, 05 Jun 2008 09:42:58 -0400

Message-ID:

<upR6RIxxIHA.5288@TK2MSFTNGP06.phx.gbl>

??? wrote:

Hello!

I've written some code that uses member template functions, and it won't
compile with VC6 (or eVC4 which we really are using). The smallest
sample I can create that illustrates the problem is the following:

class Dep
{
public:

  template<class T>
  void Add()
  {}
};

int main()
{
  Dep dep;
  dep.Add<int>();

  return 0;
}

The compiler is unable to compile dep.Add<int>() (error C2062: type
'int' unexpected). I would like some help in finding a workaround. How
can I call Dep::Add and pass it a template type? I would be grateful for
any feedback!
Thanks in advance!

This is an unusual use of template function. If you let the compiler deduce the
type from the argument, I think it would work, as long as you define the method
inside the class definition (as you did). This last requirement if for VC6.

class Dep
{
public:

   template<class T>
   void Add(const T& t)
   {}
};

int main()
{
   Dep dep;
   int n = 6;
   dep.Add(n);

   return 0;
}

[I don't have VC6 on this machine to check, but I'm sure I have done this
successfully.]

--
David Wilkinson
Visual C++ MVP