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| 2 | #ifndef BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED |
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| 3 | #define BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED |
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| 4 | |
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| 5 | // Copyright Aleksey Gurtovoy 2003-2004 |
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| 6 | // Copyright David Abrahams 2003-2004 |
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| 7 | // |
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| 8 | // Distributed under the Boost Software License, Version 1.0. |
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| 9 | // (See accompanying file LICENSE_1_0.txt or copy at |
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| 10 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 11 | // |
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| 12 | // See http://www.boost.org/libs/mpl for documentation. |
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| 13 | |
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| 14 | // $Id: order_impl.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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| 15 | // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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| 16 | // $Revision: 49267 $ |
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| 17 | |
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| 18 | #include <boost/mpl/order_fwd.hpp> |
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| 19 | #include <boost/mpl/if.hpp> |
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| 20 | #include <boost/mpl/long.hpp> |
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| 21 | #include <boost/mpl/has_key.hpp> |
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| 22 | #include <boost/mpl/aux_/overload_names.hpp> |
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| 23 | #include <boost/mpl/aux_/static_cast.hpp> |
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| 24 | #include <boost/mpl/aux_/type_wrapper.hpp> |
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| 25 | #include <boost/mpl/aux_/traits_lambda_spec.hpp> |
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| 26 | #include <boost/mpl/aux_/config/msvc.hpp> |
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| 27 | #include <boost/mpl/aux_/config/static_constant.hpp> |
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| 28 | #include <boost/mpl/aux_/config/workaround.hpp> |
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| 29 | |
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| 30 | namespace boost { namespace mpl { |
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| 31 | |
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| 32 | // default implementation; requires 'Seq' to provide corresponding overloads |
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| 33 | // of BOOST_MPL_AUX_OVERLOAD_ORDER_BY_KEY |
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| 34 | |
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| 35 | template< typename Seq, typename Key > struct x_order_impl |
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| 36 | #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \ |
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| 37 | || BOOST_WORKAROUND(__EDG_VERSION__, <= 245) |
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| 38 | { |
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| 39 | BOOST_STATIC_CONSTANT(long, value = |
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| 40 | sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_ORDER_BY_KEY( |
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| 41 | Seq |
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| 42 | , BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*, 0) |
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| 43 | ) ) |
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| 44 | ); |
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| 45 | |
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| 46 | typedef long_<value> type; |
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| 47 | |
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| 48 | #else // ISO98 C++ |
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| 49 | : long_< |
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| 50 | sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_ORDER_BY_KEY( |
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| 51 | Seq |
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| 52 | , BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*, 0) |
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| 53 | ) ) |
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| 54 | > |
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| 55 | { |
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| 56 | #endif |
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| 57 | }; |
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| 58 | |
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| 59 | template< typename Tag > |
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| 60 | struct order_impl |
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| 61 | { |
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| 62 | template< typename Seq, typename Key > struct apply |
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| 63 | : if_< |
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| 64 | typename has_key_impl<Tag>::template apply<Seq,Key> |
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| 65 | , x_order_impl<Seq,Key> |
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| 66 | , void_ |
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| 67 | >::type |
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| 68 | { |
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| 69 | }; |
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| 70 | }; |
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| 71 | |
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| 72 | BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,order_impl) |
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| 73 | |
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| 74 | }} |
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| 75 | |
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| 76 | #endif // BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED |
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