2 #ifndef BOOST_MPL_MAP_AUX_HAS_KEY_IMPL_HPP_INCLUDED
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3 #define BOOST_MPL_MAP_AUX_HAS_KEY_IMPL_HPP_INCLUDED
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5 // Copyright Aleksey Gurtovoy 2003-2004
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6 // Copyright David Abrahams 2003-2004
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8 // Distributed under the Boost Software License, Version 1.0.
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9 // (See accompanying file LICENSE_1_0.txt or copy at
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10 // http://www.boost.org/LICENSE_1_0.txt)
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12 // See http://www.boost.org/libs/mpl for documentation.
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14 // $Id: has_key_impl.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
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15 // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
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16 // $Revision: 49267 $
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18 #include <boost/mpl/has_key_fwd.hpp>
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19 #include <boost/mpl/map/aux_/tag.hpp>
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20 #include <boost/mpl/map/aux_/at_impl.hpp>
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21 #include <boost/mpl/void.hpp>
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22 #include <boost/mpl/aux_/config/typeof.hpp>
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24 namespace boost { namespace mpl {
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27 struct has_key_impl< aux::map_tag >
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29 template< typename Map, typename Key > struct apply
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30 #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)
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32 typename at_impl<aux::map_tag>
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33 ::apply<Map,Key>::type
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36 : bool_< ( x_order_impl<Map,Key>::value > 1 ) >
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44 #endif // BOOST_MPL_MAP_AUX_HAS_KEY_IMPL_HPP_INCLUDED
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