GL Profile Suite / boost_1_51_0 / boost / fusion / view / single_view / detail / deref_impl.hpp

    Copyright (c) 2001-2011 Joel de Guzman
    Copyright (c) 2011 Eric Niebler

    Distributed under the Boost Software License, Version 1.0. (See accompanying 
    file LICENSE_1_0.txt or copy at
#if !defined(BOOST_FUSION_SINGLE_VIEW_DEREF_IMPL_05052005_0258)

#include <boost/mpl/int.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/mpl/equal_to.hpp>

namespace boost { namespace fusion
    struct single_view_iterator_tag;

    namespace extension
        template <typename Tag>
        struct deref_impl;

        template <>
        struct deref_impl<single_view_iterator_tag>
            template <typename Iterator>
            struct apply
                BOOST_MPL_ASSERT((mpl::equal_to<typename Iterator::position, mpl::int_<0> >));
                typedef typename Iterator::value_type type;
                static type
                call(Iterator const& i)
                    return i.view.val;

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