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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
// Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
// (geolib/GGL), copyright (c) 1995-2010 Geodan, 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_CORE_COORDINATE_DIMENSION_HPP
#define BOOST_GEOMETRY_CORE_COORDINATE_DIMENSION_HPP
#include <cstddef>
#include <boost/mpl/assert.hpp>
#include <boost/mpl/equal_to.hpp>
#include <boost/static_assert.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/geometry/core/point_type.hpp>
namespace boost { namespace geometry
{
namespace traits
{
/*!
\brief Traits class indicating the number of dimensions of a point
\par Geometries:
- point
\par Specializations should provide:
- value (should be derived from boost::mpl::int_<D>
\ingroup traits
*/
template <typename Point, typename Enable = void>
struct dimension
{
BOOST_MPL_ASSERT_MSG
(
false, NOT_IMPLEMENTED_FOR_THIS_POINT_TYPE, (types<Point>)
);
};
} // namespace traits
#ifndef DOXYGEN_NO_DISPATCH
namespace core_dispatch
{
// Base class derive from its own specialization of point-tag
template <typename T, typename G>
struct dimension : dimension<point_tag, typename point_type<T, G>::type> {};
template <typename P>
struct dimension<point_tag, P> : traits::dimension<P> {};
} // namespace core_dispatch
#endif
/*!
\brief \brief_meta{value, number of coordinates (the number of axes of any geometry), \meta_point_type}
\tparam Geometry \tparam_geometry
\ingroup core
\qbk{[include reference/core/coordinate_dimension.qbk]}
*/
template <typename Geometry>
struct dimension
: core_dispatch::dimension
<
typename tag<Geometry>::type,
typename boost::remove_const<Geometry>::type
>
{};
/*!
\brief assert_dimension, enables compile-time checking if coordinate dimensions are as expected
\ingroup utility
*/
template <typename Geometry, int Dimensions>
inline void assert_dimension()
{
BOOST_STATIC_ASSERT((
boost::mpl::equal_to
<
geometry::dimension<Geometry>,
boost::mpl::int_<Dimensions>
>::type::value
));
}
/*!
\brief assert_dimension, enables compile-time checking if coordinate dimensions are as expected
\ingroup utility
*/
template <typename Geometry, int Dimensions>
inline void assert_dimension_less_equal()
{
BOOST_STATIC_ASSERT(( dimension<Geometry>::type::value <= Dimensions ));
}
template <typename Geometry, int Dimensions>
inline void assert_dimension_greater_equal()
{
BOOST_STATIC_ASSERT(( dimension<Geometry>::type::value >= Dimensions ));
}
/*!
\brief assert_dimension_equal, enables compile-time checking if coordinate dimensions of two geometries are equal
\ingroup utility
*/
template <typename G1, typename G2>
inline void assert_dimension_equal()
{
BOOST_STATIC_ASSERT(( dimension<G1>::type::value == dimension<G2>::type::value ));
}
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_CORE_COORDINATE_DIMENSION_HPP
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