projects / ceph.git / blame
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|---|---|---|
| 7c673cae FG |
1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
| 2 | ||
| 3 | // Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands. | |
| 4 | // Copyright (c) 2008-2014 Bruno Lalande, Paris, France. | |
| 5 | // Copyright (c) 2009-2014 Mateusz Loskot, London, UK. | |
| 6 | ||
| 7 | // This file was modified by Oracle on 2014. | |
| 8 | // Modifications copyright (c) 2014, Oracle and/or its affiliates. | |
| 9 | ||
| 10 | // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle | |
| 11 | ||
| 12 | // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library | |
| 13 | // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. | |
| 14 | ||
| 15 | // Use, modification and distribution is subject to the Boost Software License, | |
| 16 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
| 17 | // http://www.boost.org/LICENSE_1_0.txt) | |
| 18 | ||
| 19 | #ifndef BOOST_GEOMETRY_STRATEGIES_DEFAULT_LENGTH_RESULT_HPP | |
| 20 | #define BOOST_GEOMETRY_STRATEGIES_DEFAULT_LENGTH_RESULT_HPP | |
| 21 | ||
| 22 | #include <boost/variant/variant_fwd.hpp> | |
| 23 | ||
| 24 | #include <boost/geometry/core/coordinate_type.hpp> | |
| 25 | ||
| 26 | #include <boost/geometry/util/compress_variant.hpp> | |
| 27 | #include <boost/geometry/util/select_most_precise.hpp> | |
| 28 | #include <boost/geometry/util/transform_variant.hpp> | |
| 29 | ||
| 30 | ||
| 31 | namespace boost { namespace geometry | |
| 32 | { | |
| 33 | ||
| 34 | ||
| 35 | namespace resolve_strategy | |
| 36 | { | |
| 37 | ||
| 38 | template <typename Geometry> | |
| 39 | struct default_length_result | |
| 40 | { | |
| 41 | typedef typename select_most_precise | |
| 42 | < | |
| 43 | typename coordinate_type<Geometry>::type, | |
| 44 | long double | |
| 45 | >::type type; | |
| 46 | }; | |
| 47 | ||
| 48 | } // namespace resolve_strategy | |
| 49 | ||
| 50 | ||
| 51 | namespace resolve_variant | |
| 52 | { | |
| 53 | ||
| 54 | template <typename Geometry> | |
| 55 | struct default_length_result | |
| 56 | : resolve_strategy::default_length_result<Geometry> | |
| 57 | {}; | |
| 58 | ||
| 59 | template <BOOST_VARIANT_ENUM_PARAMS(typename T)> | |
| 60 | struct default_length_result<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> > | |
| 61 | { | |
| 62 | typedef typename compress_variant< | |
| 63 | typename transform_variant< | |
| 64 | boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>, | |
| 65 | resolve_strategy::default_length_result<boost::mpl::placeholders::_> | |
| 66 | >::type | |
| 67 | >::type type; | |
| 68 | }; | |
| 69 | ||
| 70 | } // namespace resolve_variant | |
| 71 | ||
| 72 | ||
| 73 | /*! | |
| 74 | \brief Meta-function defining return type of length function | |
| 75 | \ingroup length | |
| 76 | \note Length of a line of integer coordinates can be double. | |
| 77 | So we take at least a double. If Big Number types are used, | |
| 78 | we take that type. | |
| 79 | ||
| 80 | */ | |
| 81 | template <typename Geometry> | |
| 82 | struct default_length_result | |
| 83 | : resolve_variant::default_length_result<Geometry> | |
| 84 | {}; | |
| 85 | ||
| 86 | ||
| 87 | }} // namespace boost::geometry | |
| 88 | ||
| 89 | #endif // BOOST_GEOMETRY_STRATEGIES_DEFAULT_LENGTH_RESULT_HPP |