Updated boost to v1.55.0

[rsem.git] / boost / fusion / container / list / detail / empty_impl.hpp

diff --git a/boost/fusion/container/list/detail/empty_impl.hpp b/boost/fusion/container/list/detail/empty_impl.hpp
new file mode 100644 (file)
index 0000000..2392dd7
--- /dev/null
+++ b/boost/fusion/container/list/detail/empty_impl.hpp
@@ -0,0 +1,37 @@
+/*=============================================================================
+    Copyright (c) 2007 Tobias Schwinger
+
+    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_SEQUENCE_EMPTY_IMPL_HPP_INCLUDED)
+#define BOOST_FUSION_SEQUENCE_EMPTY_IMPL_HPP_INCLUDED
+
+#include <boost/type_traits/is_convertible.hpp>
+
+namespace boost { namespace fusion
+{
+    struct cons_tag;
+
+    struct nil_;
+
+    template <typename Car, typename Cdr>
+    struct cons;
+
+    namespace extension
+    {
+        template <typename Tag>
+        struct empty_impl;
+
+        template <>
+        struct empty_impl<cons_tag>
+        {
+            template <typename Sequence>
+            struct apply
+                : boost::is_convertible<Sequence, nil_>
+            {};
+        };
+    }
+}}
+
+#endif