1 2 #ifndef BOOST_MPL_SET_AUX_HAS_KEY_IMPL_HPP_INCLUDED 3 #define BOOST_MPL_SET_AUX_HAS_KEY_IMPL_HPP_INCLUDED 4 5 // Copyright Aleksey Gurtovoy 2003-2004 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/set/aux_/tag.hpp> 19 #include <boost/mpl/has_key_fwd.hpp> 20 #include <boost/mpl/bool.hpp> 21 #include <boost/mpl/aux_/overload_names.hpp> 22 #include <boost/mpl/aux_/static_cast.hpp> 23 #include <boost/mpl/aux_/yes_no.hpp> 24 #include <boost/mpl/aux_/type_wrapper.hpp> 25 #include <boost/mpl/aux_/config/workaround.hpp> 26 #include <boost/mpl/aux_/config/static_constant.hpp> 27 28 namespace boost { namespace mpl { 29 30 template<> 31 struct has_key_impl< aux::set_tag > 32 { 33 template< typename Set, typename T > struct apply 34 #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \ 35 || BOOST_WORKAROUND(__EDG_VERSION__, <= 245) 36 { 37 BOOST_STATIC_CONSTANT(bool, value = 38 ( sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_IS_MASKED( 39 Set 40 , BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<T>*, 0) 41 ) ) == sizeof(aux::no_tag) ) 42 ); 43 44 typedef bool_<value> type; 45 46 #else // ISO98 C++ 47 : bool_< 48 ( sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_IS_MASKED( 49 Set 50 , BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<T>*, 0) 51 ) ) == sizeof(aux::no_tag) ) 52 > 53 { 54 #endif 55 }; 56 }; 57 58 }} 59 60 #endif // BOOST_MPL_SET_AUX_HAS_KEY_IMPL_HPP_INCLUDED 61