80 lines
2.1 KiB
C++
80 lines
2.1 KiB
C++
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#ifndef BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED
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#define BOOST_MPL_AUX_ORDER_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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// $Source$
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// $Date$
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// $Revision$
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#include <boost/mpl/order_fwd.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/long.hpp>
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#include <boost/mpl/has_key.hpp>
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#include <boost/mpl/aux_/static_cast.hpp>
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#include <boost/mpl/aux_/type_wrapper.hpp>
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#include <boost/mpl/aux_/ptr_to_ref.hpp>
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#include <boost/mpl/aux_/traits_lambda_spec.hpp>
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#include <boost/mpl/aux_/config/msvc.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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namespace boost { namespace mpl {
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// default implementation; requires 'Seq' to provide corresponding overloads
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// of 'operator/'
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template< typename Seq, typename Key > struct x_order_impl
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561))
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{
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BOOST_STATIC_CONSTANT(long, value =
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sizeof(
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*BOOST_MPL_AUX_STATIC_CAST(Seq*, 0)
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/ BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*, 0)
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)
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);
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# if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561))
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typedef long_<(x_order_impl::value)> type;
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# else
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typedef long_<value> type;
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# endif
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#else // ISO98 C++
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: long_<
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sizeof(
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aux::ptr_to_ref(BOOST_MPL_AUX_STATIC_CAST(Seq*, 0))
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/ BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*, 0)
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)
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>
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{
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#endif
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};
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template< typename Tag >
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struct order_impl
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{
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template< typename Seq, typename Key > struct apply
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: if_<
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typename has_key_impl<Tag>::template apply<Seq,Key>
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, x_order_impl<Seq,Key>
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, void_
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>::type
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{
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};
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};
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BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,order_impl)
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}}
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#endif // BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED
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