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1 | /*============================================================================= |
2 | Copyright (c) 2009 Christopher Schmidt | |
3 | ||
4 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | ==============================================================================*/ | |
7 | ||
8 | #ifndef BOOST_FUSION_CONTAINER_MAP_DETAIL_KEY_OF_IMPL_HPP | |
9 | #define BOOST_FUSION_CONTAINER_MAP_DETAIL_KEY_OF_IMPL_HPP | |
10 | ||
11 | #include <boost/fusion/support/config.hpp> | |
12 | #include <boost/fusion/container/map/detail/cpp03/value_of_impl.hpp> | |
13 | ||
14 | namespace boost { namespace fusion { namespace extension | |
15 | { | |
16 | template <typename> | |
17 | struct key_of_impl; | |
18 | ||
19 | template <> | |
20 | struct key_of_impl<map_iterator_tag> | |
21 | { | |
22 | template <typename It> | |
23 | struct apply | |
24 | { | |
25 | typedef typename | |
26 | value_of_impl<map_iterator_tag>:: | |
27 | template apply<It>::type::first_type | |
28 | type; | |
29 | }; | |
30 | }; | |
31 | }}} | |
32 | ||
33 | #endif |