diff options
Diffstat (limited to 'boost/fusion/container/map/detail/value_at_impl.hpp')
-rw-r--r-- | boost/fusion/container/map/detail/value_at_impl.hpp | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/boost/fusion/container/map/detail/value_at_impl.hpp b/boost/fusion/container/map/detail/value_at_impl.hpp new file mode 100644 index 0000000000..31d9b38383 --- /dev/null +++ b/boost/fusion/container/map/detail/value_at_impl.hpp @@ -0,0 +1,34 @@ +/*============================================================================= + Copyright (c) 2001-2011 Joel de Guzman + Copyright (c) 2011 Brandon Kohn + + 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_MAP_DETAIL_VALUE_AT_IMPL_HPP) +#define BOOST_FUSION_MAP_DETAIL_VALUE_AT_IMPL_HPP + +#include <boost/mpl/at.hpp> + +namespace boost { namespace fusion +{ + struct map_tag; + + namespace extension + { + template <typename Tag> + struct value_at_impl; + + template <> + struct value_at_impl<map_tag> + { + template <typename Sequence, typename N> + struct apply + { + typedef typename mpl::at<typename Sequence::storage_type::types, N>::type type; + }; + }; + } +}} + +#endif //BOOST_FUSION_MAP_DETAIL_VALUE_AT_IMPL_HPP |