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Diffstat (limited to '3rdParty/Boost/src/boost/mpl/map/aux_/at_impl.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/mpl/map/aux_/at_impl.hpp | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/mpl/map/aux_/at_impl.hpp b/3rdParty/Boost/src/boost/mpl/map/aux_/at_impl.hpp new file mode 100644 index 0000000..e531a70 --- /dev/null +++ b/3rdParty/Boost/src/boost/mpl/map/aux_/at_impl.hpp @@ -0,0 +1,144 @@ + +#ifndef BOOST_MPL_MAP_AUX_AT_IMPL_HPP_INCLUDED +#define BOOST_MPL_MAP_AUX_AT_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: at_impl.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ +// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $ +// $Revision: 49267 $ + +#include <boost/mpl/at_fwd.hpp> +#include <boost/mpl/long.hpp> +#include <boost/mpl/map/aux_/tag.hpp> +#include <boost/mpl/aux_/order_impl.hpp> +#include <boost/mpl/aux_/overload_names.hpp> +#include <boost/mpl/aux_/type_wrapper.hpp> +#include <boost/mpl/aux_/ptr_to_ref.hpp> +#include <boost/mpl/aux_/static_cast.hpp> +#include <boost/mpl/aux_/config/typeof.hpp> +#include <boost/mpl/aux_/config/ctps.hpp> + +#if !defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES) +# include <boost/mpl/eval_if.hpp> +# include <boost/mpl/pair.hpp> +# include <boost/mpl/void.hpp> +# include <boost/mpl/aux_/config/static_constant.hpp> +#endif + +namespace boost { namespace mpl { + +#if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES) + +template< typename Map, typename Key > +struct m_at +{ + typedef aux::type_wrapper<Key> key_; + typedef __typeof__( BOOST_MPL_AUX_OVERLOAD_CALL_VALUE_BY_KEY( + Map + , BOOST_MPL_AUX_STATIC_CAST(key_*, 0) + ) ) type; +}; + +template<> +struct at_impl< aux::map_tag > +{ + template< typename Map, typename Key > struct apply + : aux::wrapped_type< typename m_at< + Map + , Key + >::type > + { + }; +}; + +// agurt 31/jan/04: two-step implementation for the sake of GCC 3.x +template< typename Map, long order > +struct item_by_order_impl +{ + typedef __typeof__( BOOST_MPL_AUX_OVERLOAD_CALL_ITEM_BY_ORDER( + Map + , BOOST_MPL_AUX_STATIC_CAST(long_<order>*, 0) + ) ) type; +}; + +template< typename Map, long order > +struct item_by_order + : aux::wrapped_type< + typename item_by_order_impl<Map,order>::type + > +{ +}; + +#else // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES + +# if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) + +template< typename Map, long n > struct m_at +{ + typedef void_ type; +}; + +# else + +template< long n > struct m_at_impl +{ + template< typename Map > struct result_ + { + typedef void_ type; + }; +}; + +template< typename Map, long n > struct m_at +{ + typedef typename m_at_impl<n>::result_<Map>::type type; +}; + +# endif + + +template<> +struct at_impl< aux::map_tag > +{ + template< typename Map, typename Key > struct apply + { + typedef typename m_at< Map, (x_order_impl<Map,Key>::value - 2) >::type item_; + typedef typename eval_if< + is_void_<item_> + , void_ + , second<item_> + >::type type; + }; +}; + +template< typename Map, long order > struct is_item_masked +{ + BOOST_STATIC_CONSTANT(bool, value = + sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_IS_MASKED( + Map + , BOOST_MPL_AUX_STATIC_CAST(long_<order>*, 0) + ) ) == sizeof(aux::yes_tag) + ); +}; + +template< typename Map, long order > struct item_by_order +{ + typedef typename eval_if_c< + is_item_masked<Map,order>::value + , void_ + , m_at<Map,(order - 2)> + >::type type; +}; + +#endif + +}} + +#endif // BOOST_MPL_SET_AUX_AT_IMPL_HPP_INCLUDED |