1 files changed, 48 insertions, 0 deletions
diff --git a/boost/metaparse/v1/middle_of.hpp b/boost/metaparse/v1/middle_of.hpp
new file mode 100644
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+++ b/boost/metaparse/v1/middle_of.hpp
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+#ifndef BOOST_METAPARSE_V1_KEEP_MIDDLE_HPP
+#define BOOST_METAPARSE_V1_KEEP_MIDDLE_HPP
+
+// Copyright Abel Sinkovics (abel@sinkovics.hu)  2009 - 2010.
+// 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)
+
+#include <boost/metaparse/v1/nth_of.hpp>
+#include <boost/metaparse/v1/transform_error_message.hpp>
+#include <boost/metaparse/v1/get_col.hpp>
+#include <boost/metaparse/v1/get_line.hpp>
+
+#include <boost/metaparse/v1/error/unpaired.hpp>
+
+namespace boost
+{
+  namespace metaparse
+  {
+    namespace v1
+    {
+      template <class P1, class P2, class P3>
+      struct middle_of
+      {
+        typedef middle_of type;
+
+        template <class S, class Pos>
+        struct apply :
+          nth_of_c<
+            1,
+            P1,
+            P2,
+            transform_error_message<
+              P3,
+              error::unpaired<
+                get_line<Pos>::type::value,
+                get_col<Pos>::type::value
+              >
+            >
+          >::template apply<S, Pos>
+        {};
+      };
+    }
+  }
+}
+
+#endif
+