comparison DEPENDENCIES/generic/include/boost/mpl/map/aux_/at_impl.hpp @ 16:2665513ce2d3

Add boost headers

+
+#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