adapt_deref_traits.hpp

来自「Boost provides free peer-reviewed portab」· HPP 代码 · 共 35 行

/*=============================================================================
    Copyright (c) 2001-2006 Joel de Guzman

    Distributed under the Boost Software License, Version 1.0. (See accompanying 
    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#if !defined(FUSION_ADAPT_DEREF_TRAITS_05062005_0900)
#define FUSION_ADAPT_DEREF_TRAITS_05062005_0900

#include <boost/fusion/iterator/deref.hpp>

namespace boost { namespace fusion { namespace detail
{
    struct adapt_deref_traits
    {
        template <typename Iterator>
        struct apply
        {
            typedef typename
                result_of::deref<typename Iterator::first_type>::type
            type;

            static type
            call(Iterator const& i)
            {
                return *i.first;
            }
        };
    };
}}}

#endif