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[algorithms][is_simple] add variant support

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Menelaos Karavelas
2014-06-18 12:54:09 +03:00
parent b0a5adc503
commit c94ecdbb4d
1 changed files with 40 additions and 1 deletions
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41
include/boost/geometry/algorithms/is_simple.hpp
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@@ -10,6 +10,10 @@
#ifndef BOOST_GEOMETRY_ALGORITHMS_IS_SIMPLE_HPP
#define BOOST_GEOMETRY_ALGORITHMS_IS_SIMPLE_HPP
#include <boost/variant/static_visitor.hpp>
#include <boost/variant/apply_visitor.hpp>
#include <boost/variant/variant_fwd.hpp>
#include <boost/geometry/algorithms/detail/is_simple/always_simple.hpp>
#include <boost/geometry/algorithms/detail/is_simple/areal.hpp>
#include <boost/geometry/algorithms/detail/is_simple/linear.hpp>
@@ -22,10 +26,45 @@ namespace boost { namespace geometry
{
namespace resolve_variant {
template <typename Geometry>
struct is_simple
{
static inline bool apply(Geometry const& geometry)
{
concept::check<Geometry const>();
return dispatch::is_simple<Geometry>::apply(geometry);
}
};
template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
struct is_simple<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
{
struct visitor : boost::static_visitor<bool>
{
template <typename Geometry>
bool operator()(Geometry const& geometry) const
{
return is_simple<Geometry>::apply(geometry);
}
};
static inline bool
apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry)
{
return boost::apply_visitor(visitor(), geometry);
}
};
} // namespace resolve_variant
template <typename Geometry>
inline bool is_simple(Geometry const& g)
{
return dispatch::is_simple<Geometry>::apply(g);
return resolve_variant::is_simple<Geometry>::apply(g);
}