[boost] RE: Type traits question

From: Robert Ramey (ramey_at_[hidden])
Date: 2004-04-26 16:20:40

Never mind,

I see it now.  Sorry I was desperate.

Robert Ramey

Robert Ramey wrote:
> 
> #include <boost/static_assert.hpp>
> #include <boost/type_traits/is_base_and_derived.hpp>
> #include <boost/type_traits/remove_pointer.hpp>
> 
> class Base1
> {
> 	char a;
> };
> 
> class Base2
> {
> 	int b;
> };
> 
> class Derived : public Base1, public Base2
> {
> 	long c;
> };
> 
> void main(){
> 	// this passes
> 	BOOST_STATIC_ASSERT((boost::is_base_and_derived<
> 		Base1,
> 		Derived
> 	>::value));
> 
> 	// this fails !?
> 	BOOST_STATIC_ASSERT((boost::is_base_and_derived<
> 		boost::remove_pointer<Base1 *>,
> 		boost::remove_pointer<Derived *>
> 	>::value));
> }