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/*=============================================================================
Copyright (c) 2001-2011 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_VALUE_OF_05052005_1126)
#define FUSION_VALUE_OF_05052005_1126
#include <boost/fusion/support/iterator_base.hpp>
#include <boost/fusion/support/tag_of.hpp>
namespace boost { namespace fusion
{
// Special tags:
struct iterator_facade_tag; // iterator facade tag
struct boost_array_iterator_tag; // boost::array iterator tag
struct mpl_iterator_tag; // mpl sequence iterator tag
struct std_pair_iterator_tag; // std::pair iterator tag
namespace extension
{
template <typename Tag>
struct value_of_impl
{
template <typename Iterator>
struct apply {};
};
template <>
struct value_of_impl<iterator_facade_tag>
{
template <typename Iterator>
struct apply : Iterator::template value_of<Iterator> {};
};
template <>
struct value_of_impl<boost_array_iterator_tag>;
template <>
struct value_of_impl<mpl_iterator_tag>;
template <>
struct value_of_impl<std_pair_iterator_tag>;
}
namespace result_of
{
template <typename Iterator>
struct value_of
: extension::value_of_impl<typename detail::tag_of<Iterator>::type>::
template apply<Iterator>
{};
}
}}
#endif
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