Given a template class like
template < typename T > struct A
{
template < typename U > friend bool operator == ( const A &, const U & );
template < typename U > friend bool operator == ( const U &, const A & );
template < typename U > friend bool operator != ( const A &, const U & );
template < typename U > friend bool operator != ( const U &, const A & );
// ...other stuff...
};
can I express it using equality_comparable?
Thanks, Rob.