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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 |