Incomplete work for using Boost.Polygon to compute medial axis

xs/src/boost/mpl/aux_/comparison_op.hpp

@@ -0,0 +1,83 @@
+
+// NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION
+
+// 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: comparison_op.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
+// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
+// $Revision: 49267 $
+
+#if !defined(BOOST_MPL_PREPROCESSING_MODE)
+#   include <boost/mpl/bool.hpp>
+#   include <boost/mpl/aux_/value_wknd.hpp>
+#endif
+
+#if !defined(AUX778076_OP_PREFIX)
+#   define AUX778076_OP_PREFIX AUX778076_OP_NAME
+#endif
+
+#define AUX778076_OP_ARITY 2
+
+#include <boost/mpl/aux_/numeric_op.hpp>
+#include <boost/mpl/aux_/config/static_constant.hpp>
+#include <boost/mpl/aux_/config/use_preprocessed.hpp>
+
+#if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
+    && !defined(BOOST_MPL_PREPROCESSING_MODE)
+
+#   define BOOST_MPL_PREPROCESSED_HEADER AUX778076_OP_PREFIX.hpp
+#   include <boost/mpl/aux_/include_preprocessed.hpp>
+
+#else
+
+#   include <boost/mpl/aux_/config/integral.hpp>
+#   include <boost/preprocessor/cat.hpp>
+
+namespace boost { namespace mpl {
+
+// MSVC workaround: implement less in terms of greater
+#if 0 AUX778076_OP_TOKEN 1 && !(1 AUX778076_OP_TOKEN 0) && !(0 AUX778076_OP_TOKEN 0)
+#   define AUX778076_OP(N1, N2) \
+    ( BOOST_MPL_AUX_VALUE_WKND(N2)::value > BOOST_MPL_AUX_VALUE_WKND(N1)::value ) \
+/**/
+#else
+#   define AUX778076_OP(N1, N2) \
+    ( BOOST_MPL_AUX_VALUE_WKND(N1)::value \
+          AUX778076_OP_TOKEN BOOST_MPL_AUX_VALUE_WKND(N2)::value \
+        ) \
+/**/
+#endif
+
+template<>
+struct AUX778076_OP_IMPL_NAME<integral_c_tag,integral_c_tag>
+{
+    template< typename N1, typename N2 > struct apply
+#if !defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC)
+        : bool_< AUX778076_OP(N1, N2) >
+    {
+#else
+    {
+        BOOST_STATIC_CONSTANT(bool, value = AUX778076_OP(N1, N2));
+        typedef bool_<value> type;
+#endif
+    };
+};
+
+#undef AUX778076_OP
+
+}}
+
+#endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
+
+#undef AUX778076_OP_TAG_NAME
+#undef AUX778076_OP_IMPL_NAME
+#undef AUX778076_OP_ARITY
+#undef AUX778076_OP_PREFIX
+#undef AUX778076_OP_NAME
+#undef AUX778076_OP_TOKEN