forked from boostorg/mpl
82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
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#ifndef BOOST_MPL_MULTISET_AUX_COUNT_IMPL_HPP_INCLUDED
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#define BOOST_MPL_MULTISET_AUX_COUNT_IMPL_HPP_INCLUDED
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// + file: boost/mpl/multiset/aux_/count_impl.hpp
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// + last modified: 05/nov/03
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// Copyright Aleksey Gurtovoy 2003
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//
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// Use, modification and distribution are subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy
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// at 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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#include "boost/mpl/multiset/aux_/tag.hpp"
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#include "boost/mpl/count_fwd.hpp"
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#include "boost/mpl/int.hpp"
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#include "boost/mpl/aux_/type_wrapper.hpp"
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#include "boost/mpl/aux_/static_cast.hpp"
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#include "boost/mpl/aux_/config/static_constant.hpp"
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#include "boost/mpl/aux_/config/workaround.hpp"
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#include "boost/mpl/aux_/config/msvc.hpp"
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
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# include "boost/mpl/if.hpp"
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# include "boost/type_traits/is_reference.hpp"
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#endif
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namespace boost { namespace mpl {
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
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namespace aux {
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template< typename S, typename U >
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struct multiset_count_impl
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: int_< sizeof(S::key_count(BOOST_MPL_AUX_STATIC_CAST(U*,0))) - 1 >
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{
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};
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template< typename S, typename U >
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struct multiset_count_ref_impl
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{
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typedef U (* u_)();
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typedef int_< sizeof(S::ref_key_count(BOOST_MPL_AUX_STATIC_CAST(u_,0))) - 1 > type_;
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BOOST_STATIC_CONSTANT(int, value = type_::value);
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typedef type_ type;
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};
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}
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template<>
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struct count_impl< aux::multiset_tag >
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{
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template< typename Set, typename Key > struct apply
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: if_<
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is_reference<Key>
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, aux::multiset_count_ref_impl<Set,Key>
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, aux::multiset_count_impl<Set,Key>
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>::type
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{
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};
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};
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#else
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template<>
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struct count_impl< aux::multiset_tag >
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{
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template< typename Set, typename Key > struct apply
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{
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enum { msvc71_wknd_ = sizeof(Set::key_count(BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*,0))) - 1 };
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typedef int_< msvc71_wknd_ > type;
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BOOST_STATIC_CONSTANT(int, value = msvc71_wknd_);
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};
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};
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#endif // BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
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}} // namespace boost::mpl
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#endif // BOOST_MPL_MULTISET_AUX_COUNT_IMPL_HPP_INCLUDED
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