110 lines
2.8 KiB
C++
110 lines
2.8 KiB
C++
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// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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// This file was modified by Oracle on 2020.
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// Modifications copyright (c) 2020 Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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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_GEOMETRY_ID_HPP
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#define BOOST_GEOMETRY_CORE_GEOMETRY_ID_HPP
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#include <type_traits>
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#include <boost/geometry/core/static_assert.hpp>
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#include <boost/geometry/core/tag.hpp>
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#include <boost/geometry/core/tags.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DISPATCH
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namespace core_dispatch
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{
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template <typename GeometryTag>
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struct geometry_id
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{
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BOOST_GEOMETRY_STATIC_ASSERT_FALSE(
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"Not implemented for this Geometry type.",
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GeometryTag);
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};
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template <>
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struct geometry_id<point_tag> : std::integral_constant<int, 1> {};
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template <>
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struct geometry_id<linestring_tag> : std::integral_constant<int, 2> {};
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template <>
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struct geometry_id<polygon_tag> : std::integral_constant<int, 3> {};
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template <>
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struct geometry_id<multi_point_tag> : std::integral_constant<int, 4> {};
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template <>
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struct geometry_id<multi_linestring_tag> : std::integral_constant<int, 5> {};
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template <>
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struct geometry_id<multi_polygon_tag> : std::integral_constant<int, 6> {};
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template <>
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struct geometry_id<geometry_collection_tag> : std::integral_constant<int, 7> {};
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template <>
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struct geometry_id<segment_tag> : std::integral_constant<int, 92> {};
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template <>
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struct geometry_id<ring_tag> : std::integral_constant<int, 93> {};
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template <>
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struct geometry_id<box_tag> : std::integral_constant<int, 94> {};
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} // namespace core_dispatch
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#endif
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/*!
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\brief Meta-function returning the id of a geometry type
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\details The meta-function geometry_id defines a numerical ID (based on
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std::integral_constant<int, ...> ) for each geometry concept. A numerical ID is
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sometimes useful, and within Boost.Geometry it is used for the
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reverse_dispatch metafuntion.
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\note Used for e.g. reverse meta-function
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\ingroup core
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*/
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template <typename Geometry>
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struct geometry_id : core_dispatch::geometry_id<typename tag<Geometry>::type>
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{};
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_CORE_GEOMETRY_ID_HPP
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