1 // Boost.Geometry (aka GGL, Generic Geometry Library)
2 
3 // Copyright (c) 2014, Oracle and/or its affiliates.
4 
5 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
6 
7 // Licensed under the Boost Software License version 1.0.
8 // http://www.boost.org/users/license.html
9 
10 #ifndef BOOST_GEOMETRY_ALGORITHS_DETAIL_DISTANCE_IS_COMPARABLE_HPP
11 #define BOOST_GEOMETRY_ALGORITHS_DETAIL_DISTANCE_IS_COMPARABLE_HPP
12 
13 #include <boost/type_traits/is_same.hpp>
14 
15 #include <boost/geometry/strategies/distance.hpp>
16 
17 
18 namespace boost { namespace geometry
19 {
20 
21 #ifndef DOXYGEN_NO_DETAIL
22 namespace detail { namespace distance
23 {
24 
25 
26 // metafunction to determine is a strategy is comparable or not
27 template <typename Strategy>
28 struct is_comparable
29     : boost::is_same
30         <
31             Strategy,
32             typename strategy::distance::services::comparable_type
33               <
34                   Strategy
35               >::type
36         >
37 {};
38 
39 
40 }} // namespace detail::distance
41 #endif // DOXYGEN_NO_DETAIL
42 
43 }} // namespace boost::geometry
44 
45 #endif // BOOST_GEOMETRY_ALGORITHS_DETAIL_DISTANCE_IS_COMPARABLE_HPP
46