Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
14352 changed files with 3176737 additions and 0 deletions
@@ -0,0 +1,84 @@
+/*=============================================================================
+    Copyright (c) 2001-2011 Joel de Guzman
+    Copyright (c) 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_DISTANCE_IMPL_20060124_2033)
+#define FUSION_DISTANCE_IMPL_20060124_2033
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/mpl/eval_if.hpp>
+#include <boost/mpl/placeholders.hpp>
+#include <boost/mpl/assert.hpp>
+#include <boost/fusion/iterator/distance.hpp>
+#include <boost/fusion/support/category_of.hpp>
+#include <boost/fusion/algorithm/query/find_if.hpp>
+#include <boost/fusion/sequence/intrinsic/end.hpp>
+#include <boost/fusion/sequence/intrinsic/value_at.hpp>
+#include <boost/type_traits/is_same.hpp>
+
+namespace boost { namespace fusion {
+
+    struct zip_view_iterator_tag;
+
+    struct random_access_iterator_tag;
+
+    namespace detail
+    {
+        template<typename FoundIt, typename SearchIt>
+        struct best_distance
+        {
+            typedef typename result_of::find_if<
+                typename SearchIt::iterators, is_same<traits::category_of<mpl::_>, random_access_iterator_tag> > finder;
+
+            BOOST_MPL_ASSERT_NOT((is_same<typename finder::type, result_of::end<typename SearchIt::iterators> >));
+
+            typedef typename result_of::distance<FoundIt, typename finder::type>::type type;
+        };
+
+        template<typename It1, typename It2>
+        struct default_distance
+            : result_of::distance<
+            typename result_of::value_at_c<typename It1::iterators, 0>::type,
+            typename result_of::value_at_c<typename It2::iterators, 0>::type>
+        {};
+
+        template<typename It1, typename It2>
+        struct zip_view_iterator_distance
+        {
+            typedef typename result_of::find_if<
+                typename It1::iterators, is_same<traits::category_of<mpl::_>, random_access_iterator_tag> > finder;
+                
+            typedef typename mpl::eval_if<
+                is_same<typename finder::type, typename result_of::end<typename It1::iterators>::type>,
+                detail::default_distance<It1, It2> ,
+                detail::best_distance<typename finder::type, It2> >::type type;               
+        };
+    }
+
+    namespace extension
+    {
+        template<typename Tag>
+        struct distance_impl;
+
+        template<>
+        struct distance_impl<zip_view_iterator_tag>
+        {
+            template<typename It1, typename It2>
+            struct apply
+                : detail::zip_view_iterator_distance<It1, It2>::type
+            {
+                BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+                static typename detail::zip_view_iterator_distance<It1, It2>::type
+                call(It1 const& /*it1*/, It2 const& /*it2*/)
+                {
+                    return typename detail::zip_view_iterator_distance<It1, It2>::type();
+                }                
+            };
+        };
+    }
+}}
+
+#endif