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- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // Copyright (c) 2014-2017, Oracle and/or its affiliates.
- // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
- // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
- // Licensed under the Boost Software License version 1.0.
- // http://www.boost.org/users/license.html
- #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_ALWAYS_SIMPLE_HPP
- #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_ALWAYS_SIMPLE_HPP
- #include <boost/geometry/core/tags.hpp>
- #include <boost/geometry/algorithms/dispatch/is_simple.hpp>
- namespace boost { namespace geometry
- {
- #ifndef DOXYGEN_NO_DETAIL
- namespace detail { namespace is_simple
- {
- template <typename Geometry>
- struct always_simple
- {
- template <typename Strategy>
- static inline bool apply(Geometry const&, Strategy const&)
- {
- return true;
- }
- };
- }} // namespace detail::is_simple
- #endif // DOXYGEN_NO_DETAIL
- #ifndef DOXYGEN_NO_DISPATCH
- namespace dispatch
- {
- // A point is always simple
- template <typename Point>
- struct is_simple<Point, point_tag>
- : detail::is_simple::always_simple<Point>
- {};
- // A valid segment is always simple.
- // A segment is a curve.
- // A curve is simple if it does not pass through the same point twice,
- // with the possible exception of its two endpoints
- //
- // Reference: OGC 06-103r4 (6.1.6.1)
- template <typename Segment>
- struct is_simple<Segment, segment_tag>
- : detail::is_simple::always_simple<Segment>
- {};
- // A valid box is always simple
- // A box is a Polygon, and it satisfies the conditions for Polygon validity.
- //
- // Reference (for polygon validity): OGC 06-103r4 (6.1.11.1)
- template <typename Box>
- struct is_simple<Box, box_tag>
- : detail::is_simple::always_simple<Box>
- {};
- } // namespace dispatch
- #endif // DOXYGEN_NO_DISPATCH
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_ALWAYS_SIMPLE_HPP
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