Incomplete work for using Boost.Polygon to compute medial axis

xs/src/boost/range/size.hpp

@@ -0,0 +1,52 @@
+// Boost.Range library
+//
+//  Copyright Thorsten Ottosen 2003-2004. Use, modification and
+//  distribution is subject to 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)
+//
+// For more information, see http://www.boost.org/libs/range/
+//
+
+#ifndef BOOST_RANGE_SIZE_HPP
+#define BOOST_RANGE_SIZE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif
+
+#include <boost/range/config.hpp>
+#include <boost/range/begin.hpp>
+#include <boost/range/end.hpp>
+#include <boost/range/size_type.hpp>
+#include <boost/assert.hpp>
+
+namespace boost
+{
+    namespace range_detail
+    {
+        template<class SinglePassRange>
+        inline BOOST_DEDUCED_TYPENAME range_size<const SinglePassRange>::type
+        range_calculate_size(const SinglePassRange& rng)
+        {
+            BOOST_ASSERT( (boost::end(rng) - boost::begin(rng)) >= 0 &&
+                          "reachability invariant broken!" );
+            return boost::end(rng) - boost::begin(rng);
+        }
+    }
+
+    template<class SinglePassRange>
+    inline BOOST_DEDUCED_TYPENAME range_size<const SinglePassRange>::type
+    size(const SinglePassRange& rng)
+    {
+#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
+    !BOOST_WORKAROUND(__GNUC__, < 3) \
+    /**/
+        using namespace range_detail;
+#endif
+        return range_calculate_size(rng);
+    }
+
+} // namespace 'boost'
+
+#endif