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 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 ``` ``````// Boost.Geometry (aka GGL, Generic Geometry Library) // Copyright (c) 2017-2017 Barend Gehrels, Amsterdam, the Netherlands. // Use, modification and distribution is subject to the Boost Software License, // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_IS_SELF_TURN_HPP #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_IS_SELF_TURN_HPP #include namespace boost { namespace geometry { #ifndef DOXYGEN_NO_DETAIL namespace detail { namespace overlay { template struct is_self_turn_check { template static inline bool apply(Turn const& turn) { return turn.operations[0].seg_id.source_index == turn.operations[1].seg_id.source_index; } }; template <> struct is_self_turn_check { template static inline bool apply(Turn const& turn) { return false; } }; template <> struct is_self_turn_check { template static inline bool apply(Turn const& turn) { return false; } }; template <> struct is_self_turn_check { template static inline bool apply(Turn const& turn) { return false; } }; template bool is_self_turn(Turn const& turn) { return is_self_turn_check::apply(turn); } }} // namespace detail::overlay #endif // DOXYGEN_NO_DETAIL }} // namespace boost::geometry #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_IS_SELF_TURN_HPP ``````