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cad76bf9a0
Do not store pointers to ranges in iterators and views. Implement copy ctors in iterators allowing to convert compatible iterators. In copy ctors use enable_if instead of static_assert.
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
// 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 2020-2021.
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// Modifications copyright (c) 2020-2021 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_VIEWS_IDENTITY_VIEW_HPP
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#define BOOST_GEOMETRY_VIEWS_IDENTITY_VIEW_HPP
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#include <boost/range/iterator_range.hpp>
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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namespace boost { namespace geometry
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{
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// Silence warning C4512: assignment operator could not be generated
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#if defined(_MSC_VER)
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#pragma warning(push)
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#pragma warning(disable : 4512)
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#endif
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/*!
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\brief View on a range, not modifying anything
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\tparam Range original range
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\ingroup views
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*/
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template <typename Range>
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struct identity_view
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{
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using const_iterator = typename boost::range_iterator<Range const>::type;
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using iterator = typename boost::range_iterator<Range>::type;
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explicit inline identity_view(Range& r)
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: m_begin(boost::begin(r))
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, m_end(boost::end(r))
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{}
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inline const_iterator begin() const { return m_begin; }
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inline const_iterator end() const { return m_end; }
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inline iterator begin() { return m_begin; }
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inline iterator end() { return m_end; }
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private:
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iterator m_begin;
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iterator m_end;
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};
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#if defined(_MSC_VER)
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#pragma warning(pop)
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#endif
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_VIEWS_IDENTITY_VIEW_HPP
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