Added thirdparty: boost library

thirdparty/include/boost/geometry/strategies/distance/comparable.hpp

@@ -0,0 +1,63 @@
+// Boost.Geometry
+
+// Copyright (c) 2021, Oracle and/or its affiliates.
+
+// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
+
+// Licensed under the Boost Software License version 1.0.
+// http://www.boost.org/users/license.html
+
+#ifndef BOOST_GEOMETRY_STRATEGIES_DISTANCE_COMPARABLE_HPP
+#define BOOST_GEOMETRY_STRATEGIES_DISTANCE_COMPARABLE_HPP
+
+
+#include <boost/geometry/core/cs.hpp>
+#include <boost/geometry/core/static_assert.hpp>
+
+#include <boost/geometry/strategies/distance.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+namespace strategies { namespace distance
+{
+
+#ifndef DOXYGEN_NO_DETAIL
+namespace detail
+{
+
+template <typename Strategies>
+struct comparable
+    : public Strategies
+{
+    comparable() = default;
+
+    explicit comparable(Strategies const& strategies)
+        : Strategies(strategies)
+    {}
+
+    template <typename Geometry1, typename Geometry2>
+    auto distance(Geometry1 const& g1, Geometry2 const& g2) const
+    {
+        return strategy::distance::services::get_comparable
+            <
+                decltype(Strategies::distance(g1, g2))
+            >::apply(Strategies::distance(g1, g2));
+    }
+};
+
+template <typename Strategies>
+inline comparable<Strategies> make_comparable(Strategies const& strategies)
+{
+    return comparable<Strategies>(strategies);
+}
+
+} // namespace detail
+#endif // DOXYGEN_NO_DETAIL
+
+}} // namespace strategies::distance
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_STRATEGIES_DISTANCE_COMPARABLE_HPP