#ifndef BOOST_MPL_MULTISET_AUX_COUNT_IMPL_HPP_INCLUDED #define BOOST_MPL_MULTISET_AUX_COUNT_IMPL_HPP_INCLUDED // Copyright Aleksey Gurtovoy 2003-2004 // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/mpl for documentation. // $Id: count_impl.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $ // $Revision: 49267 $ #include <boost/mpl/multiset/aux_/tag.hpp> #include <boost/mpl/count_fwd.hpp> #include <boost/mpl/int.hpp> #include <boost/mpl/aux_/type_wrapper.hpp> #include <boost/mpl/aux_/static_cast.hpp> #include <boost/mpl/aux_/config/static_constant.hpp> #include <boost/mpl/aux_/config/workaround.hpp> #include <boost/mpl/aux_/config/msvc.hpp> #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) # include <boost/mpl/if.hpp> # include <boost/type_traits/is_reference.hpp> #endif namespace boost { namespace mpl { #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) namespace aux { template< typename S, typename U > struct multiset_count_impl : int_< sizeof(S::key_count(BOOST_MPL_AUX_STATIC_CAST(U*,0))) - 1 > { }; template< typename S, typename U > struct multiset_count_ref_impl { typedef U (* u_)(); typedef int_< sizeof(S::ref_key_count(BOOST_MPL_AUX_STATIC_CAST(u_,0))) - 1 > type_; BOOST_STATIC_CONSTANT(int, value = type_::value); typedef type_ type; }; } template<> struct count_impl< aux::multiset_tag > { template< typename Set, typename Key > struct apply : if_< is_reference<Key> , aux::multiset_count_ref_impl<Set,Key> , aux::multiset_count_impl<Set,Key> >::type { }; }; #else template<> struct count_impl< aux::multiset_tag > { template< typename Set, typename Key > struct apply { enum { msvc71_wknd_ = sizeof(Set::key_count(BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*,0))) - 1 }; typedef int_< msvc71_wknd_ > type; BOOST_STATIC_CONSTANT(int, value = msvc71_wknd_); }; }; #endif // BOOST_WORKAROUND(BOOST_MSVC, <= 1300) }} #endif // BOOST_MPL_MULTISET_AUX_COUNT_IMPL_HPP_INCLUDED