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- /*=============================================================================
- Copyright (c) 2007 Tobias Schwinger
- 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(BOOST_FUSION_ITERATOR_RANGE_AT_IMPL_HPP_INCLUDED)
- #define BOOST_FUSION_ITERATOR_RANGE_AT_IMPL_HPP_INCLUDED
- #include <boost/fusion/support/config.hpp>
- #include <boost/fusion/iterator/advance.hpp>
- #include <boost/fusion/iterator/deref.hpp>
- namespace boost { namespace fusion
- {
- struct iterator_range_tag;
- namespace extension
- {
- template <typename Tag>
- struct at_impl;
- template <>
- struct at_impl<iterator_range_tag>
- {
- template <typename Seq, typename N>
- struct apply
- {
- typedef typename Seq::begin_type begin_type;
- typedef typename result_of::advance<begin_type,N>::type pos;
- typedef typename result_of::deref<pos>::type type;
- BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- static type
- call(Seq& s)
- {
- return * fusion::advance<N>(s.first);
- }
- };
- };
- }
- }}
- #endif
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