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#ifndef BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED
#define BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED
// Copyright Aleksey Gurtovoy 2003-2004
// Copyright David Abrahams 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.
// $Id$
// $Date$
// $Revision$
#include <boost/mpl/order_fwd.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/long.hpp>
#include <boost/mpl/has_key.hpp>
#include <boost/mpl/aux_/overload_names.hpp>
#include <boost/mpl/aux_/static_cast.hpp>
#include <boost/mpl/aux_/type_wrapper.hpp>
#include <boost/mpl/aux_/traits_lambda_spec.hpp>
#include <boost/mpl/aux_/config/msvc.hpp>
#include <boost/mpl/aux_/config/static_constant.hpp>
#include <boost/mpl/aux_/config/workaround.hpp>
namespace boost { namespace mpl {
// default implementation; requires 'Seq' to provide corresponding overloads
// of BOOST_MPL_AUX_OVERLOAD_ORDER_BY_KEY
template< typename Seq, typename Key > struct x_order_impl
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \
|| BOOST_WORKAROUND(__EDG_VERSION__, <= 245)
{
BOOST_STATIC_CONSTANT(long, value =
sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_ORDER_BY_KEY(
Seq
, BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*, 0)
) )
);
typedef long_<value> type;
#else // ISO98 C++
: long_<
sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_ORDER_BY_KEY(
Seq
, BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*, 0)
) )
>
{
#endif
};
template< typename Tag >
struct order_impl
{
template< typename Seq, typename Key > struct apply
: if_<
typename has_key_impl<Tag>::template apply<Seq,Key>
, x_order_impl<Seq,Key>
, void_
>::type
{
};
};
BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,order_impl)
}}
#endif // BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED
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