Re: [Boost-users] enable_if, type_traits and Visual C++ 7.0

From: David Abrahams (dave_at_[hidden])
Date: 2005-11-03 11:00:10

"Ovanes Markarian" <om_boost_at_[hidden]> writes:

> I am trying to get enable if to work with Visual C++ 7.0 and boost 1.33.
>
>
> for the following member function implemenation I get an error:
>
> 	template<>
> 		typename boost::enable_if<boost::is_pointer<_ElemFct::result_type>, _ElemFct::result_type>::type
> 		operator->()
> 	{
> 		return get_at(ptr_coll, pos);
> 	}
>
> 	template<>
> 		typename boost::enable_if<boost::is_reference<_ElemFct::result_type>,
> boost::add_pointer<_ElemFct::result_type>::type>::type
> 		operator->()
> 	{
> 		return &(get_at(ptr_coll, pos));
> 	}

Sorry, but VC 7.0 doesn't support SFINAE, so enable_if can't work there.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com