Chris@16: 
Chris@16: #ifndef BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED
Chris@16: #define BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED
Chris@16: 
Chris@16: // Copyright Aleksey Gurtovoy 2003-2004
Chris@16: // Copyright David Abrahams 2003-2004
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. 
Chris@16: // (See accompanying file LICENSE_1_0.txt or copy at 
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // See http://www.boost.org/libs/mpl for documentation.
Chris@16: 
Chris@101: // $Id$
Chris@101: // $Date$
Chris@101: // $Revision$
Chris@16: 
Chris@16: #include <boost/mpl/order_fwd.hpp>
Chris@16: #include <boost/mpl/if.hpp>
Chris@16: #include <boost/mpl/long.hpp>
Chris@16: #include <boost/mpl/has_key.hpp>
Chris@16: #include <boost/mpl/aux_/overload_names.hpp>
Chris@16: #include <boost/mpl/aux_/static_cast.hpp>
Chris@16: #include <boost/mpl/aux_/type_wrapper.hpp>
Chris@16: #include <boost/mpl/aux_/traits_lambda_spec.hpp>
Chris@16: #include <boost/mpl/aux_/config/msvc.hpp>
Chris@16: #include <boost/mpl/aux_/config/static_constant.hpp>
Chris@16: #include <boost/mpl/aux_/config/workaround.hpp>
Chris@16: 
Chris@16: namespace boost { namespace mpl {
Chris@16: 
Chris@16: // default implementation; requires 'Seq' to provide corresponding overloads 
Chris@16: // of BOOST_MPL_AUX_OVERLOAD_ORDER_BY_KEY
Chris@16: 
Chris@16: template< typename Seq, typename Key > struct x_order_impl
Chris@16: #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \
Chris@16:     || BOOST_WORKAROUND(__EDG_VERSION__, <= 245)
Chris@16: {
Chris@16:     BOOST_STATIC_CONSTANT(long, value = 
Chris@16:           sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_ORDER_BY_KEY(
Chris@16:               Seq
Chris@16:             , BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*, 0)
Chris@16:             ) )
Chris@16:         );
Chris@16: 
Chris@16:     typedef long_<value> type;
Chris@16: 
Chris@16: #else // ISO98 C++
Chris@16:     : long_< 
Chris@16:           sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_ORDER_BY_KEY(
Chris@16:               Seq
Chris@16:             , BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*, 0)
Chris@16:             ) )
Chris@16:         >
Chris@16: {
Chris@16: #endif
Chris@16: };
Chris@16: 
Chris@16: template< typename Tag >
Chris@16: struct order_impl
Chris@16: {
Chris@16:     template< typename Seq, typename Key > struct apply
Chris@16:         : if_<
Chris@16:               typename has_key_impl<Tag>::template apply<Seq,Key>
Chris@16:             , x_order_impl<Seq,Key>
Chris@16:             , void_
Chris@16:             >::type
Chris@16:     {
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,order_impl)
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif // BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED