Re: [boost] is_virtual_base_of ?

11 Mar 2009

      Robert Ramey wrote:

I'm still having some problems with this.  Some compilers are flaging as an 
error
the case where B doesn't have a default constructor.

Robert Ramey
...
...
template< typename D, typename B >
struct is_virtual_base_of
{
  struct X : D, virtual B {};
  enum { value = sizeof(X)==sizeof(D) };
};
template< typename T >
struct is_virtual_base_of< T, T >
{
  enum { value = false };
};