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54 lines
1.3 KiB
54 lines
1.3 KiB
3 years ago
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#ifndef BOOST_MPL_MAP_AUX_ERASE_KEY_IMPL_HPP_INCLUDED
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#define BOOST_MPL_MAP_AUX_ERASE_KEY_IMPL_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2003-2004
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// Copyright David Abrahams 2003-2004
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/mpl for documentation.
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// $Id$
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// $Date$
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// $Revision$
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#include <boost/mpl/erase_key_fwd.hpp>
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#include <boost/mpl/map/aux_/has_key_impl.hpp>
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#include <boost/mpl/map/aux_/item.hpp>
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#include <boost/mpl/map/aux_/tag.hpp>
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#include <boost/mpl/identity.hpp>
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#include <boost/mpl/base.hpp>
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#include <boost/mpl/eval_if.hpp>
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#include <boost/type_traits/is_same.hpp>
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namespace boost { namespace mpl {
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template<>
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struct erase_key_impl< aux::map_tag >
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{
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template<
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typename Map
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, typename Key
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>
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struct apply
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: eval_if<
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has_key_impl<aux::map_tag>::apply<Map,Key>
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, eval_if<
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is_same< Key,typename Map::key_ >
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, base<Map>
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, identity< m_mask<Key,Map> >
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>
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, identity<Map>
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>
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{
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};
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};
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}}
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#endif // BOOST_MPL_MAP_AUX_ERASE_KEY_IMPL_HPP_INCLUDED
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