value_traits.hpp

来自「C++的一个好库。。。现在很流行」· HPP 代码 · 共 38 行

/*=============================================================================
    Copyright (c) 2003 Joel de Guzman

    Use, modification and distribution is subject to 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_ITERATOR_DETAIL_SINGLE_VIEW_ITERATOR_VALUE_TRAITS_HPP)
#define FUSION_ITERATOR_DETAIL_SINGLE_VIEW_ITERATOR_VALUE_TRAITS_HPP

#include <boost/spirit/fusion/detail/config.hpp>

namespace boost { namespace fusion
{
    struct single_view_iterator_tag;

    namespace meta
    {
        template <typename Tag>
        struct value_impl;

        template <>
        struct value_impl<single_view_iterator_tag>
        {
            template <typename Iterator>
            struct apply
            {
                typedef typename Iterator::single_view_type single_view_type;
                typedef FUSION_GET_VALUE_TYPE(single_view_type) type;
            };
        };
    }
}}

#endif