1 2 #ifndef BOOST_MPL_SET_AUX_ERASE_KEY_IMPL_HPP_INCLUDED 3 #define BOOST_MPL_SET_AUX_ERASE_KEY_IMPL_HPP_INCLUDED 4 5 // Copyright Aleksey Gurtovoy 2003-2007 6 // Copyright David Abrahams 2003-2004 7 // 8 // Distributed under the Boost Software License, Version 1.0. 9 // (See accompanying file LICENSE_1_0.txt or copy at 10 // http://www.boost.org/LICENSE_1_0.txt) 11 // 12 // See http://www.boost.org/libs/mpl for documentation. 13 14 // $Id$ 15 // $Date$ 16 // $Revision$ 17 18 #include <boost/mpl/erase_key_fwd.hpp> 19 #include <boost/mpl/set/aux_/has_key_impl.hpp> 20 #include <boost/mpl/set/aux_/item.hpp> 21 #include <boost/mpl/set/aux_/tag.hpp> 22 #include <boost/mpl/identity.hpp> 23 #include <boost/mpl/base.hpp> 24 #include <boost/mpl/eval_if.hpp> 25 26 #include <boost/type_traits/is_same.hpp> 27 28 namespace pdalboost { namespace mpl { 29 30 template<> 31 struct erase_key_impl< aux::set_tag > 32 { 33 template< 34 typename Set 35 , typename T 36 > 37 struct apply 38 : eval_if< 39 has_key_impl<aux::set_tag>::apply<Set,T> 40 , eval_if< 41 is_same< T,typename Set::item_type_ > 42 , base<Set> 43 , identity< s_mask<T,typename Set::item_> > 44 > 45 , identity<Set> 46 > 47 { 48 }; 49 }; 50 51 }} 52 53 #endif // BOOST_MPL_SET_AUX_ERASE_KEY_IMPL_HPP_INCLUDED 54