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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.
// This file was modified by Oracle on 2020-2021.
// Modifications copyright (c) 2020-2021 Oracle and/or its affiliates.
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// 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 <type_traits>
#include <boost/range/size_type.hpp>
#include <boost/range/value_type.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 std::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 std::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);
}
static inline void apply(typename rvalue_type<Range>::type range,
item_type && item)
{
range.push_back(std::move(item));
}
};
/*!
\brief Traits class to append an element of geometry collection
\ingroup mutable_range
*/
template <typename Range>
struct emplace_back
{
// When specializing it'd be enough to only implement it for one argument
// because we'll use it to pass one object of type potentially different
// than range_value but which range_value can be constructed from.
template <typename ...Args>
static inline void apply(typename rvalue_type<Range>::type range,
Args&&... args)
{
range.emplace_back(std::forward<Args>(args)...);
}
};
/*!
\brief Traits class to append a point to a range (ring, linestring, multi*)
\ingroup mutable_range
*/
template <typename Range>
struct resize
{
using size_type = typename boost::range_size
<
typename std::remove_reference<Range>::type
>::type;
static inline void apply(typename rvalue_type<Range>::type range,
size_type new_size)
{
range.resize(new_size);
}
};
} // namespace traits
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_CORE_MUTABLE_RANGE_HPP
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