[boost] Re: Type traits question

From: Daniel Wallin (dalwan01_at_[hidden])
Date: 2004-04-26 16:36:36

Robert Ramey wrote:
> Is there a type traits guru that can explain to me why the following doesn't
> work as I expect.  It's got to be something very, very obvious but I can't
> see it.

remove_pointer<> is a metafunction. You need to get the result through
the nested 'type'.

   remove_pointer<int*>::type x = 3;

[snip]
> 	// this fails !?
> 	BOOST_STATIC_ASSERT((boost::is_base_and_derived<
> 		boost::remove_pointer<Base1 *>::type,
                                               ^^^^^^
> 		boost::remove_pointer<Derived *>::type
                                                 ^^^^^^
> 	>::value));
> }

-- 
Daniel Wallin