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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_INTERFACE_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_INTERFACE_HPP
#include <boost/variant/apply_visitor.hpp>
#include <boost/variant/static_visitor.hpp>
#include <boost/variant/variant_fwd.hpp>
#include <boost/geometry/geometries/concepts/check.hpp>
#include <boost/geometry/algorithms/dispatch/is_simple.hpp>
#include <boost/geometry/core/cs.hpp>
#include <boost/geometry/strategies/default_strategy.hpp>
#include <boost/geometry/strategies/intersection.hpp>
namespace boost { namespace geometry
{
namespace resolve_strategy
{
struct is_simple
{
template <typename Geometry, typename Strategy>
static inline bool apply(Geometry const& geometry,
Strategy const& strategy)
{
return dispatch::is_simple<Geometry>::apply(geometry, strategy);
}
template <typename Geometry>
static inline bool apply(Geometry const& geometry,
default_strategy)
{
// NOTE: Currently the strategy is only used for Linear geometries
typedef typename strategy::intersection::services::default_strategy
<
typename cs_tag<Geometry>::type
>::type strategy_type;
return dispatch::is_simple<Geometry>::apply(geometry, strategy_type());
}
};
} // namespace resolve_strategy
namespace resolve_variant
{
template <typename Geometry>
struct is_simple
{
template <typename Strategy>
static inline bool apply(Geometry const& geometry, Strategy const& strategy)
{
concepts::check<Geometry const>();
return resolve_strategy::is_simple::apply(geometry, strategy);
}
};
template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
struct is_simple<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
{
template <typename Strategy>
struct visitor : boost::static_visitor<bool>
{
Strategy const& m_strategy;
visitor(Strategy const& strategy)
: m_strategy(strategy)
{}
template <typename Geometry>
bool operator()(Geometry const& geometry) const
{
return is_simple<Geometry>::apply(geometry, m_strategy);
}
};
template <typename Strategy>
static inline bool
apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry,
Strategy const& strategy)
{
return boost::apply_visitor(visitor<Strategy>(strategy), geometry);
}
};
} // namespace resolve_variant
/*!
\brief \brief_check{is simple}
\ingroup is_simple
\tparam Geometry \tparam_geometry
\tparam Strategy \tparam_strategy{Is_simple}
\param geometry \param_geometry
\param strategy \param_strategy{is_simple}
\return \return_check{is simple}
\qbk{distinguish,with strategy}
\qbk{[include reference/algorithms/is_simple.qbk]}
*/
template <typename Geometry, typename Strategy>
inline bool is_simple(Geometry const& geometry, Strategy const& strategy)
{
return resolve_variant::is_simple<Geometry>::apply(geometry, strategy);
}
/*!
\brief \brief_check{is simple}
\ingroup is_simple
\tparam Geometry \tparam_geometry
\param geometry \param_geometry
\return \return_check{is simple}
\qbk{[include reference/algorithms/is_simple.qbk]}
*/
template <typename Geometry>
inline bool is_simple(Geometry const& geometry)
{
return resolve_variant::is_simple<Geometry>::apply(geometry, default_strategy());
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_INTERFACE_HPP
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