95 lines
2.1 KiB
C++
95 lines
2.1 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
|
|
|
|
// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
|
|
// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
|
|
// 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_GEOMETRY_ID_HPP
|
|
#define BOOST_GEOMETRY_CORE_GEOMETRY_ID_HPP
|
|
|
|
|
|
#include <boost/mpl/assert.hpp>
|
|
#include <boost/mpl/int.hpp>
|
|
#include <boost/type_traits.hpp>
|
|
|
|
|
|
#include <boost/geometry/core/tag.hpp>
|
|
#include <boost/geometry/core/tags.hpp>
|
|
|
|
|
|
namespace boost { namespace geometry
|
|
{
|
|
|
|
|
|
#ifndef DOXYGEN_NO_DISPATCH
|
|
namespace core_dispatch
|
|
{
|
|
|
|
template <typename GeometryTag>
|
|
struct geometry_id
|
|
{
|
|
BOOST_MPL_ASSERT_MSG
|
|
(
|
|
false, NOT_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE
|
|
, (types<GeometryTag>)
|
|
);
|
|
};
|
|
|
|
|
|
template <>
|
|
struct geometry_id<point_tag> : boost::mpl::int_<1> {};
|
|
|
|
|
|
template <>
|
|
struct geometry_id<linestring_tag> : boost::mpl::int_<2> {};
|
|
|
|
|
|
template <>
|
|
struct geometry_id<polygon_tag> : boost::mpl::int_<3> {};
|
|
|
|
|
|
template <>
|
|
struct geometry_id<segment_tag> : boost::mpl::int_<92> {};
|
|
|
|
|
|
template <>
|
|
struct geometry_id<ring_tag> : boost::mpl::int_<93> {};
|
|
|
|
|
|
template <>
|
|
struct geometry_id<box_tag> : boost::mpl::int_<94> {};
|
|
|
|
|
|
|
|
} // namespace core_dispatch
|
|
#endif
|
|
|
|
|
|
|
|
/*!
|
|
\brief Meta-function returning the id of a geometry type
|
|
\details The meta-function geometry_id defines a numerical ID (based on
|
|
boost::mpl::int_<...> ) for each geometry concept. A numerical ID is
|
|
sometimes useful, and within Boost.Geometry it is used for the
|
|
reverse_dispatch metafuntion.
|
|
\note Used for e.g. reverse meta-function
|
|
\ingroup core
|
|
*/
|
|
template <typename Geometry>
|
|
struct geometry_id : core_dispatch::geometry_id<typename tag<Geometry>::type>
|
|
{};
|
|
|
|
|
|
}} // namespace boost::geometry
|
|
|
|
|
|
#endif // BOOST_GEOMETRY_CORE_GEOMETRY_ID_HPP
|