95 lines
2.6 KiB
C++
95 lines
2.6 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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// 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_UTIL_FOR_EACH_COORDINATE_HPP
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#define BOOST_GEOMETRY_UTIL_FOR_EACH_COORDINATE_HPP
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#include <boost/concept/requires.hpp>
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#include <boost/geometry/geometries/concepts/point_concept.hpp>
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#include <boost/geometry/util/add_const_if_c.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail
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{
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template <typename Point, int Dimension, int DimensionCount, bool IsConst>
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struct coordinates_scanner
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{
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template <typename Op>
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static inline Op apply(typename add_const_if_c
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<
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IsConst,
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Point
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>::type& point, Op operation)
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{
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operation.template apply<Point, Dimension>(point);
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return coordinates_scanner
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<
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Point,
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Dimension+1,
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DimensionCount,
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IsConst
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>::apply(point, operation);
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}
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};
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template <typename Point, int DimensionCount, bool IsConst>
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struct coordinates_scanner<Point, DimensionCount, DimensionCount, IsConst>
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{
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template <typename Op>
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static inline Op apply(typename add_const_if_c
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<
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IsConst,
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Point
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>::type& , Op operation)
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{
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return operation;
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}
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};
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} // namespace detail
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#endif // DOXYGEN_NO_DETAIL
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template <typename Point, typename Op>
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inline void for_each_coordinate(Point& point, Op operation)
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{
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BOOST_CONCEPT_ASSERT( (concept::Point<Point>) );
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typedef typename detail::coordinates_scanner
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<
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Point, 0, dimension<Point>::type::value, false
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> scanner;
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scanner::apply(point, operation);
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}
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template <typename Point, typename Op>
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inline Op for_each_coordinate(Point const& point, Op operation)
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{
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BOOST_CONCEPT_ASSERT( (concept::ConstPoint<Point>) );
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typedef typename detail::coordinates_scanner
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<
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Point, 0, dimension<Point>::type::value, true
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> scanner;
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return scanner::apply(point, operation);
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_UTIL_FOR_EACH_COORDINATE_HPP
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