add boost on mac

macx64/include/boost/fusion/view/nview/detail/begin_impl.hpp

@@ -0,0 +1,49 @@
+/*=============================================================================
+    Copyright (c) 2009 Hartmut Kaiser
+
+    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(BOOST_FUSION_NVIEW_BEGIN_IMPL_SEP_23_2009_1036PM)
+#define BOOST_FUSION_NVIEW_BEGIN_IMPL_SEP_23_2009_1036PM
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/fusion/sequence/intrinsic/begin.hpp>
+
+namespace boost { namespace fusion
+{
+    struct nview_tag;
+
+    template <typename Sequence, typename Pos>
+    struct nview_iterator;
+
+    namespace extension
+    {
+        template<typename Tag>
+        struct begin_impl;
+
+        template<>
+        struct begin_impl<nview_tag>
+        {
+            template<typename Sequence>
+            struct apply
+            {
+                typedef typename Sequence::index_type index_type;
+
+                typedef nview_iterator<Sequence,
+                    typename result_of::begin<index_type>::type> type;
+
+                BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+                static type call(Sequence& s)
+                {
+                    return type(s);
+                }
+            };
+        };
+    }
+
+}}
+
+#endif
+