Incomplete work for using Boost.Polygon to compute medial axis

xs/src/boost/mpl/begin_end.hpp

@@ -0,0 +1,57 @@
+
+#ifndef BOOST_MPL_BEGIN_END_HPP_INCLUDED
+#define BOOST_MPL_BEGIN_END_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2000-2004
+//
+// 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)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Id: begin_end.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
+// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
+// $Revision: 49267 $
+
+#include <boost/mpl/begin_end_fwd.hpp>
+#include <boost/mpl/aux_/begin_end_impl.hpp>
+#include <boost/mpl/sequence_tag.hpp>
+#include <boost/mpl/aux_/na_spec.hpp>
+#include <boost/mpl/aux_/lambda_support.hpp>
+
+namespace boost { namespace mpl {
+
+// agurt, 13/sep/02: switched from inheritance to typedef; MSVC is more
+// happy this way (less ETI-related errors), and it doesn't affect 
+// anything else
+template<
+      typename BOOST_MPL_AUX_NA_PARAM(Sequence)
+    >
+struct begin
+{
+    typedef typename sequence_tag<Sequence>::type tag_;
+    typedef typename begin_impl< tag_ >
+        ::template apply< Sequence >::type type;
+
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(1,begin,(Sequence))
+};
+
+template<
+      typename BOOST_MPL_AUX_NA_PARAM(Sequence)
+    >
+struct end
+{
+    typedef typename sequence_tag<Sequence>::type tag_;
+    typedef typename end_impl< tag_ >
+        ::template apply< Sequence >::type type;
+
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(1,end,(Sequence))
+};
+
+BOOST_MPL_AUX_NA_SPEC(1, begin)
+BOOST_MPL_AUX_NA_SPEC(1, end)
+
+}}
+
+#endif // BOOST_MPL_BEGIN_END_HPP_INCLUDED