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