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- // 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_MUTABLE_RANGE_HPP
- #define BOOST_GEOMETRY_CORE_MUTABLE_RANGE_HPP
- #include <cstddef>
- #include <boost/range/value_type.hpp>
- #include <boost/type_traits/remove_reference.hpp>
- namespace boost { namespace geometry
- {
- namespace traits
- {
- /*!
- \brief Metafunction to define the argument passed to the three
- traits classes clear, push_back and resize
- \ingroup mutable_range
- */
- template <typename Range>
- struct rvalue_type
- {
- typedef typename boost::remove_reference<Range>::type& type;
- };
- /*!
- \brief Traits class to clear a geometry
- \ingroup mutable_range
- */
- template <typename Range>
- struct clear
- {
- static inline void apply(typename rvalue_type<Range>::type range)
- {
- range.clear();
- }
- };
- /*!
- \brief Traits class to append a point to a range (ring, linestring, multi*)
- \ingroup mutable_range
- */
- template <typename Range>
- struct push_back
- {
- typedef typename boost::range_value
- <
- typename boost::remove_reference<Range>::type
- >::type item_type;
- static inline void apply(typename rvalue_type<Range>::type range,
- item_type const& item)
- {
- range.push_back(item);
- }
- };
- /*!
- \brief Traits class to append a point to a range (ring, linestring, multi*)
- \ingroup mutable_range
- */
- template <typename Range>
- struct resize
- {
- static inline void apply(typename rvalue_type<Range>::type range,
- std::size_t new_size)
- {
- range.resize(new_size);
- }
- };
- } // namespace traits
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_CORE_MUTABLE_RANGE_HPP
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