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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2014, Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, 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
{
static inline bool apply(Geometry 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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