is_polymorphic?

From: Daryle Walker (darylew_at_[hidden])
Date: 2001-04-30 22:10:33

Should we have a function to determine if a class is polymorphic?  I guess
it would be in type_traits.  Here's a sample implementation I saw in an
Usenet message:

> template<class T> bool is_polymorphic()
> {
>  bool result = false;
>  typeid(result = true, T());
>  return result;
> }

I think this version is for compilers that need assistance from function
arguments for determining template parameters.

> template<class T> bool is_polymorphic( const T&r )
> {
>  bool result = false;
>  typeid(result = true, r);
>  return result;
> }

-- 
Daryle Walker
Mac, Internet, and Video Game Junkie
darylew AT mac DOT com