Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
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+/*=============================================================================
+    Copyright (c) 2001-2011 Joel de Guzman
+    Copyright (c) 2005-2006 Dan Marsden
+
+    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)
+==============================================================================*/
+#if !defined(FUSION_ADVANCE_IMPL_14122005_2015)
+#define FUSION_ADVANCE_IMPL_14122005_2015
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/fusion/iterator/advance.hpp>
+#include <boost/mpl/negate.hpp>
+
+namespace boost { namespace fusion {
+
+    struct reverse_view_iterator_tag;
+
+    template <typename Iterator>
+    struct reverse_view_iterator;
+
+    namespace extension
+    {
+        template<typename Tag>
+        struct advance_impl;
+
+        template<>
+        struct advance_impl<reverse_view_iterator_tag>
+        {
+            template<typename Iterator, typename Dist>
+            struct apply
+            {
+                typedef typename Iterator::first_type first_type;
+                typedef typename mpl::negate<Dist>::type negative_dist;
+                typedef typename result_of::advance<first_type, negative_dist>::type advanced_type;
+                typedef reverse_view_iterator<advanced_type> type;
+
+                BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+                static type
+                call(Iterator const& i)
+                {
+                    return type(boost::fusion::advance<negative_dist>(i.first));
+                }
+            };
+        };
+    }
+}}
+
+#endif