Updated boost to v1.55.0

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

diff --git a/boost/fusion/support/is_sequence.hpp b/boost/fusion/support/is_sequence.hpp
index d57cecb4101dc5ca7c69fa7769b1f5d6d7171fd4..184bbbb6dcc5c0484ba4e0d547b404f8d2119ae0 100644 (file)
--- a/boost/fusion/support/is_sequence.hpp
+++ b/boost/fusion/support/is_sequence.hpp
@@ -1,18 +1,19 @@
 /*=============================================================================
-    Copyright (c) 2001-2006 Joel de Guzman
+    Copyright (c) 2001-2011 Joel de Guzman
 
-    Distributed under the Boost Software License, Version 1.0. (See accompanying 
+    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_SEQUENCE_05052005_1002)
 #define FUSION_IS_SEQUENCE_05052005_1002
 
-#include <boost/type_traits/is_base_of.hpp>
 #include <boost/fusion/support/sequence_base.hpp>
 #include <boost/fusion/support/tag_of.hpp>
 #include <boost/mpl/is_sequence.hpp>
 #include <boost/mpl/or.hpp>
 #include <boost/mpl/bool.hpp>
+#include <boost/type_traits/is_convertible.hpp>
+#include <boost/type_traits/is_same.hpp>
 
 namespace boost { namespace fusion
 {
@@ -29,7 +30,9 @@ namespace boost { namespace fusion
         struct is_sequence_impl
         {
             template <typename Sequence>
-            struct apply : is_base_of<sequence_root, Sequence> {};
+            struct apply
+              : is_convertible<Sequence, detail::from_sequence_convertible_type>
+            {};
         };
 
         template <>
@@ -56,9 +59,16 @@ namespace boost { namespace fusion
     {
         template <typename T>
         struct is_sequence
-          : extension::is_sequence_impl<
+          : mpl::bool_<
+                (bool)extension::is_sequence_impl<
                 typename fusion::detail::tag_of<T>::type
-            >::template apply<T>
+                >::template apply<T>::type::value
+            >
+        {};
+
+        template <typename Sequence, typename Enable = void>
+        struct is_native_fusion_sequence
+          : is_convertible<Sequence, detail::from_sequence_convertible_type>
         {};
     }
 }}