projects / ceph.git / blame
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1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
| 2 | ||
| 3 | // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands. | |
| 4 | // Copyright (c) 2008-2012 Bruno Lalande, Paris, France. | |
| 5 | // Copyright (c) 2009-2012 Mateusz Loskot, London, UK. | |
| 6 | ||
| 20effc67 TL |
7 | // This file was modified by Oracle on 2020. |
| 8 | // Modifications copyright (c) 2020 Oracle and/or its affiliates. | |
| 9 | // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle | |
| 10 | ||
| 7c673cae FG |
11 | // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library |
| 12 | // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. | |
| 13 | ||
| 14 | // Use, modification and distribution is subject to the Boost Software License, | |
| 15 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
| 16 | // http://www.boost.org/LICENSE_1_0.txt) | |
| 17 | ||
| 18 | #ifndef BOOST_GEOMETRY_VIEWS_REVERSIBLE_VIEW_HPP | |
| 19 | #define BOOST_GEOMETRY_VIEWS_REVERSIBLE_VIEW_HPP | |
| 20 | ||
| 21 | ||
| 22 | #include <boost/version.hpp> | |
| 7c673cae FG |
23 | #include <boost/range/adaptor/reversed.hpp> |
| 24 | ||
| 25 | #include <boost/geometry/core/ring_type.hpp> | |
| 26 | #include <boost/geometry/core/tag.hpp> | |
| 27 | #include <boost/geometry/core/tags.hpp> | |
| 28 | ||
| 29 | #include <boost/geometry/views/identity_view.hpp> | |
| 30 | ||
| 31 | namespace boost { namespace geometry | |
| 32 | { | |
| 33 | ||
| 34 | /*! | |
| 35 | \brief Flag for iterating a reversible_view in forward or reverse direction | |
| 36 | \ingroup views | |
| 37 | */ | |
| 38 | enum iterate_direction { iterate_forward, iterate_reverse }; | |
| 39 | ||
| 40 | /*! | |
| 41 | \brief View on a range, reversing direction if necessary | |
| 42 | \tparam Range original range | |
| 43 | \tparam Direction direction of iteration | |
| 44 | \ingroup views | |
| 45 | */ | |
| 46 | template <typename Range, iterate_direction Direction> | |
| 47 | struct reversible_view {}; | |
| 48 | ||
| 49 | ||
| 50 | ||
| 51 | #ifndef DOXYGEN_NO_SPECIALIZATIONS | |
| 52 | ||
| 53 | template <typename Range> | |
| 54 | struct reversible_view<Range, iterate_forward> | |
| 55 | { | |
| 56 | typedef identity_view<Range> type; | |
| 57 | }; | |
| 58 | ||
| 59 | ||
| 60 | template <typename Range> | |
| 61 | struct reversible_view<Range, iterate_reverse> | |
| 62 | { | |
| 63 | #if BOOST_VERSION > 104500 | |
| 64 | typedef boost::reversed_range<Range> type; | |
| 65 | #else | |
| 66 | // For older versions of Boost | |
| 67 | typedef boost::range_detail::reverse_range<Range> type; | |
| 68 | #endif | |
| 69 | }; | |
| 70 | ||
| 71 | #endif // DOXYGEN_NO_SPECIALIZATIONS | |
| 72 | ||
| 73 | ||
| 74 | }} // namespace boost::geometry | |
| 75 | ||
| 76 | ||
| 77 | #endif // BOOST_GEOMETRY_VIEWS_REVERSIBLE_VIEW_HPP |