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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2011-2012 Akira Takahashi
// Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_GEOMETRY_GEOMETRIES_ADAPTED_FUSION_HPP
#define BOOST_GEOMETRY_GEOMETRIES_ADAPTED_FUSION_HPP
#include <cstddef>
#include <boost/fusion/include/is_sequence.hpp>
#include <boost/fusion/include/size.hpp>
#include <boost/fusion/include/tag_of.hpp>
#include <boost/fusion/include/front.hpp>
#include <boost/fusion/include/at.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/fusion/mpl.hpp>
#include <boost/mpl/front.hpp>
#include <boost/mpl/count_if.hpp>
#include <boost/mpl/pop_front.hpp>
#include <boost/mpl/size.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/remove_reference.hpp>
#include <boost/mpl/placeholders.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/front.hpp>
#include <boost/geometry/core/access.hpp>
#include <boost/geometry/core/coordinate_dimension.hpp>
#include <boost/geometry/core/coordinate_system.hpp>
#include <boost/geometry/core/coordinate_type.hpp>
#include <boost/geometry/core/point_type.hpp>
#include <boost/geometry/core/tags.hpp>
namespace boost { namespace geometry
{
namespace fusion_adapt_detail
{
template <class Sequence>
struct all_same :
boost::mpl::bool_<
boost::mpl::count_if<
Sequence,
boost::is_same<
typename boost::mpl::front<Sequence>::type,
boost::mpl::_
>
>::value == boost::mpl::size<Sequence>::value
>
{};
template <class Sequence>
struct is_coordinate_size : boost::mpl::bool_<
boost::fusion::result_of::size<Sequence>::value == 2 ||
boost::fusion::result_of::size<Sequence>::value == 3> {};
template<typename Sequence>
struct is_fusion_sequence
: mpl::and_<boost::fusion::traits::is_sequence<Sequence>,
fusion_adapt_detail::is_coordinate_size<Sequence>,
fusion_adapt_detail::all_same<Sequence> >
{};
} // namespace fusion_adapt_detail
#ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
namespace traits
{
// Boost Fusion Sequence, 2D or 3D
template <typename Sequence>
struct coordinate_type
<
Sequence,
typename boost::enable_if
<
fusion_adapt_detail::is_fusion_sequence<Sequence>
>::type
>
{
typedef typename boost::mpl::front<Sequence>::type type;
};
template <typename Sequence>
struct dimension
<
Sequence,
typename boost::enable_if
<
fusion_adapt_detail::is_fusion_sequence<Sequence>
>::type
> : boost::mpl::size<Sequence>
{};
template <typename Sequence, std::size_t Dimension>
struct access
<
Sequence,
Dimension,
typename boost::enable_if
<
fusion_adapt_detail::is_fusion_sequence<Sequence>
>::type
>
{
typedef typename coordinate_type<Sequence>::type ctype;
static inline ctype get(Sequence const& point)
{
return boost::fusion::at_c<Dimension>(point);
}
template <class CoordinateType>
static inline void set(Sequence& point, CoordinateType const& value)
{
boost::fusion::at_c<Dimension>(point) = value;
}
};
template <typename Sequence>
struct tag
<
Sequence,
typename boost::enable_if
<
fusion_adapt_detail::is_fusion_sequence<Sequence>
>::type
>
{
typedef point_tag type;
};
} // namespace traits
#endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
}} // namespace boost::geometry
// Convenience registration macro to bind a Fusion sequence to a CS
#define BOOST_GEOMETRY_REGISTER_BOOST_FUSION_CS(CoordinateSystem) \
namespace boost { namespace geometry { namespace traits { \
template <typename Sequence> \
struct coordinate_system \
< \
Sequence, \
typename boost::enable_if \
< \
fusion_adapt_detail::is_fusion_sequence<Sequence> \
>::type \
> \
{ typedef CoordinateSystem type; }; \
}}}
#endif // BOOST_GEOMETRY_GEOMETRIES_ADAPTED_FUSION_HPP
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