Updated boost to v1.55.0

[rsem.git] / boost / fusion / view / iterator_range / detail / is_segmented_impl.hpp

diff --git a/boost/fusion/view/iterator_range/detail/is_segmented_impl.hpp b/boost/fusion/view/iterator_range/detail/is_segmented_impl.hpp
new file mode 100644 (file)
index 0000000..032225d
--- /dev/null
+++ b/boost/fusion/view/iterator_range/detail/is_segmented_impl.hpp
@@ -0,0 +1,66 @@
+/*=============================================================================
+    Copyright (c) 2011 Eric Niebler
+
+    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_ITERATOR_RANGE_IS_SEGMENTED_HPP_INCLUDED)
+#define BOOST_FUSION_ITERATOR_RANGE_IS_SEGMENTED_HPP_INCLUDED
+
+#include <boost/mpl/assert.hpp>
+#include <boost/mpl/bool.hpp>
+
+namespace boost { namespace fusion
+{
+    struct iterator_range_tag;
+
+    template <typename Context>
+    struct segmented_iterator;
+
+    namespace extension
+    {
+        template <typename Tag>
+        struct is_segmented_impl;
+
+        // An iterator_range of segmented_iterators is segmented
+        template <>
+        struct is_segmented_impl<iterator_range_tag>
+        {
+        private:
+            template <typename Iterator>
+            struct is_segmented_iterator
+              : mpl::false_
+            {};
+
+            template <typename Iterator>
+            struct is_segmented_iterator<Iterator &>
+              : is_segmented_iterator<Iterator>
+            {};
+
+            template <typename Iterator>
+            struct is_segmented_iterator<Iterator const>
+              : is_segmented_iterator<Iterator>
+            {};
+
+            template <typename Context>
+            struct is_segmented_iterator<segmented_iterator<Context> >
+              : mpl::true_
+            {};
+
+        public:
+            template <typename Sequence>
+            struct apply
+              : is_segmented_iterator<typename Sequence::begin_type>
+            {
+                BOOST_MPL_ASSERT_RELATION(
+                    is_segmented_iterator<typename Sequence::begin_type>::value
+                  , ==
+                  , is_segmented_iterator<typename Sequence::end_type>::value);
+            };
+        };
+    }
+}}
+
+#endif
+
+