Updated boost to v1.55.0

[rsem.git] / boost / fusion / support / is_view.hpp

diff --git a/boost/fusion/support/is_view.hpp b/boost/fusion/support/is_view.hpp
new file mode 100644 (file)
index 0000000..4ec9e06
--- /dev/null
+++ b/boost/fusion/support/is_view.hpp
@@ -0,0 +1,66 @@
+/*=============================================================================
+    Copyright (c) 2001-2011 Joel de Guzman
+
+    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_IS_VIEW_03202006_0015)
+#define FUSION_IS_VIEW_03202006_0015
+
+#include <boost/mpl/bool.hpp>
+#include <boost/fusion/support/detail/is_view.hpp>
+#include <boost/fusion/support/tag_of.hpp>
+
+namespace boost { namespace fusion
+{
+    // Special tags:
+    struct sequence_facade_tag;
+    struct boost_tuple_tag; // boost::tuples::tuple tag
+    struct boost_array_tag; // boost::array tag
+    struct mpl_sequence_tag; // mpl sequence tag
+    struct std_pair_tag; // std::pair tag
+
+    namespace extension
+    {
+        template<typename Tag>
+        struct is_view_impl
+        {
+            template <typename T>
+            struct apply
+                : detail::fusion_is_view<T>
+            {};
+        };
+
+        template <>
+        struct is_view_impl<sequence_facade_tag>
+        {
+            template <typename Sequence>
+            struct apply : Sequence::is_view {};
+        };
+
+        template <>
+        struct is_view_impl<boost_tuple_tag>;
+
+        template <>
+        struct is_view_impl<boost_array_tag>;
+
+        template <>
+        struct is_view_impl<mpl_sequence_tag>;
+
+        template <>
+        struct is_view_impl<std_pair_tag>;
+    }
+
+    namespace traits
+    {
+        template <typename T>
+        struct is_view :
+            mpl::bool_<
+                (bool)extension::is_view_impl<typename fusion::detail::tag_of<T>::type>::
+                    template apply<T>::type::value
+            >
+        {};
+    }
+}}
+
+#endif