Chris@16: // Boost.Geometry (aka GGL, Generic Geometry Library)
Chris@16: 
Chris@16: // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
Chris@16: // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
Chris@16: // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
Chris@16: 
Chris@16: // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
Chris@16: // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
Chris@16: 
Chris@16: // Use, modification and distribution is subject to the Boost Software License,
Chris@16: // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_GEOMETRY_VIEWS_CLOSEABLE_VIEW_HPP
Chris@16: #define BOOST_GEOMETRY_VIEWS_CLOSEABLE_VIEW_HPP
Chris@16: 
Chris@16: 
Chris@16: #include <boost/range.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/core/closure.hpp>
Chris@16: #include <boost/geometry/core/ring_type.hpp>
Chris@16: #include <boost/geometry/core/tag.hpp>
Chris@16: #include <boost/geometry/core/tags.hpp>
Chris@16: #include <boost/geometry/iterators/closing_iterator.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/views/identity_view.hpp>
Chris@16: 
Chris@16: namespace boost { namespace geometry
Chris@16: {
Chris@16: 
Chris@16: // Silence warning C4512: assignment operator could not be generated
Chris@16: #if defined(_MSC_VER)
Chris@101: #pragma warning(push)
Chris@16: #pragma warning(disable : 4512)
Chris@16: #endif
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_DETAIL
Chris@16: 
Chris@16: namespace detail
Chris@16: {
Chris@16: 
Chris@16: template <typename Range>
Chris@16: struct closing_view
Chris@16: {
Chris@16:     // Keep this explicit, important for nested views/ranges
Chris@16:     explicit inline closing_view(Range& r)
Chris@16:         : m_range(r)
Chris@16:     {}
Chris@16: 
Chris@16:     typedef closing_iterator<Range> iterator;
Chris@16:     typedef closing_iterator<Range const> const_iterator;
Chris@16: 
Chris@16:     inline const_iterator begin() const { return const_iterator(m_range); }
Chris@16:     inline const_iterator end() const { return const_iterator(m_range, true); }
Chris@16: 
Chris@16:     inline iterator begin() { return iterator(m_range); }
Chris@16:     inline iterator end() { return iterator(m_range, true); }
Chris@16: private :
Chris@16:     Range& m_range;
Chris@16: };
Chris@16: 
Chris@16: }
Chris@16: 
Chris@16: #endif // DOXYGEN_NO_DETAIL
Chris@16: 
Chris@16: 
Chris@16: /*!
Chris@16: \brief View on a range, either closing it or leaving it as it is
Chris@16: \details The closeable_view is used internally by the library to handle all rings,
Chris@101:     either closed or open, the same way. The default method is closed, all
Chris@16:     algorithms process rings as if they are closed. Therefore, if they are opened,
Chris@16:     a view is created which closes them.
Chris@16:     The closeable_view might be used by library users, but its main purpose is
Chris@16:     internally.
Chris@16: \tparam Range Original range
Chris@16: \tparam Close Specifies if it the range is closed, if so, nothing will happen.
Chris@16:     If it is open, it will iterate the first point after the last point.
Chris@16: \ingroup views
Chris@16: */
Chris@16: template <typename Range, closure_selector Close>
Chris@16: struct closeable_view {};
Chris@16: 
Chris@16: 
Chris@16: #ifndef DOXYGEN_NO_SPECIALIZATIONS
Chris@16: 
Chris@16: template <typename Range>
Chris@16: struct closeable_view<Range, closed>
Chris@16: {
Chris@16:     typedef identity_view<Range> type;
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: template <typename Range>
Chris@16: struct closeable_view<Range, open>
Chris@16: {
Chris@16:     typedef detail::closing_view<Range> type;
Chris@16: };
Chris@16: 
Chris@16: #endif // DOXYGEN_NO_SPECIALIZATIONS
Chris@16: 
Chris@16: 
Chris@16: #if defined(_MSC_VER)
Chris@16: #pragma warning(pop)
Chris@16: #endif
Chris@16: 
Chris@16: }} // namespace boost::geometry
Chris@16: 
Chris@16: 
Chris@16: #endif // BOOST_GEOMETRY_VIEWS_CLOSEABLE_VIEW_HPP