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1
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2 #ifndef BOOST_MPL_MAP_AUX_CONTAINS_IMPL_HPP_INCLUDED
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3 #define BOOST_MPL_MAP_AUX_CONTAINS_IMPL_HPP_INCLUDED
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4
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5 // Copyright Aleksey Gurtovoy 2003-2004
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6 //
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7 // Distributed under the Boost Software License, Version 1.0.
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8 // (See accompanying file LICENSE_1_0.txt or copy at
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9 // http://www.boost.org/LICENSE_1_0.txt)
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10 //
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11 // See http://www.boost.org/libs/mpl for documentation.
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12
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13 // $Id: contains_impl.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
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14 // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
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15 // $Revision: 49267 $
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16
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17 #include <boost/mpl/contains_fwd.hpp>
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18 #include <boost/mpl/if.hpp>
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19 #include <boost/mpl/map/aux_/at_impl.hpp>
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20 #include <boost/mpl/map/aux_/tag.hpp>
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21
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22 #include <boost/type_traits/is_same.hpp>
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23
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24 namespace boost { namespace mpl {
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25
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26 template<>
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27 struct contains_impl< aux::map_tag >
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28 {
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29 template< typename Map, typename Pair > struct apply
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30 : is_same<
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31 typename at_impl<aux::map_tag>::apply<
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32 Map
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33 , typename Pair::first
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34 >::type
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35 , typename Pair::second
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36 >
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37 {
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38 };
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39 };
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40
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41 }}
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42
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43 #endif // BOOST_MPL_MAP_AUX_CONTAINS_IMPL_HPP_INCLUDED
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