127 lines
3.4 KiB
C++
127 lines
3.4 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
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// Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_CORE_COORDINATE_DIMENSION_HPP
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#define BOOST_GEOMETRY_CORE_COORDINATE_DIMENSION_HPP
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#include <cstddef>
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#include <boost/mpl/assert.hpp>
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#include <boost/mpl/equal_to.hpp>
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#include <boost/static_assert.hpp>
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#include <boost/geometry/core/point_type.hpp>
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#include <boost/geometry/util/bare_type.hpp>
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namespace boost { namespace geometry
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{
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namespace traits
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{
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/*!
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\brief Traits class indicating the number of dimensions of a point
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\par Geometries:
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- point
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\par Specializations should provide:
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- value (should be derived from boost::mpl::int_<D>
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\ingroup traits
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*/
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template <typename Point, typename Enable = void>
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struct dimension
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{
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BOOST_MPL_ASSERT_MSG
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(
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false, NOT_IMPLEMENTED_FOR_THIS_POINT_TYPE, (types<Point>)
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);
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};
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} // namespace traits
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#ifndef DOXYGEN_NO_DISPATCH
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namespace core_dispatch
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{
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// Base class derive from its own specialization of point-tag
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template <typename T, typename G>
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struct dimension : dimension<point_tag, typename point_type<T, G>::type> {};
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template <typename P>
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struct dimension<point_tag, P> : traits::dimension<typename geometry::util::bare_type<P>::type> {};
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} // namespace core_dispatch
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#endif
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/*!
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\brief \brief_meta{value, number of coordinates (the number of axes of any geometry), \meta_point_type}
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\tparam Geometry \tparam_geometry
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\ingroup core
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\qbk{[include reference/core/coordinate_dimension.qbk]}
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*/
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template <typename Geometry>
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struct dimension
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: core_dispatch::dimension
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<
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typename tag<Geometry>::type,
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typename geometry::util::bare_type<Geometry>::type
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>
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{};
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/*!
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\brief assert_dimension, enables compile-time checking if coordinate dimensions are as expected
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\ingroup utility
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*/
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template <typename Geometry, int Dimensions>
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inline void assert_dimension()
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{
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BOOST_STATIC_ASSERT((
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boost::mpl::equal_to
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<
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geometry::dimension<Geometry>,
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boost::mpl::int_<Dimensions>
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>::type::value
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));
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}
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/*!
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\brief assert_dimension, enables compile-time checking if coordinate dimensions are as expected
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\ingroup utility
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*/
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template <typename Geometry, int Dimensions>
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inline void assert_dimension_less_equal()
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{
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BOOST_STATIC_ASSERT(( dimension<Geometry>::type::value <= Dimensions ));
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}
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template <typename Geometry, int Dimensions>
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inline void assert_dimension_greater_equal()
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{
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BOOST_STATIC_ASSERT(( dimension<Geometry>::type::value >= Dimensions ));
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}
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/*!
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\brief assert_dimension_equal, enables compile-time checking if coordinate dimensions of two geometries are equal
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\ingroup utility
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*/
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template <typename G1, typename G2>
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inline void assert_dimension_equal()
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{
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BOOST_STATIC_ASSERT(( dimension<G1>::type::value == dimension<G2>::type::value ));
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_CORE_COORDINATE_DIMENSION_HPP
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