update ceph source to reef 18.1.2

[ceph.git] / ceph / src / boost / boost / geometry / iterators / detail / iterator_base.hpp

diff --git a/ceph/src/boost/boost/geometry/iterators/detail/iterator_base.hpp b/ceph/src/boost/boost/geometry/iterators/detail/iterator_base.hpp
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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_ITERATORS_DETAIL_ITERATOR_BASE_HPP
+#define BOOST_GEOMETRY_ITERATORS_DETAIL_ITERATOR_BASE_HPP
+
+#include <type_traits>
+
+#include <boost/iterator/iterator_adaptor.hpp>
+#include <boost/iterator/iterator_categories.hpp>
+
+#ifndef DOXYGEN_NO_DETAIL
+namespace boost { namespace geometry { namespace detail { namespace iterators
+{
+
+template
+<
+    typename DerivedClass,
+    typename Iterator,
+    typename TraversalFlag = boost::bidirectional_traversal_tag
+>
+struct iterator_base
+    : public boost::iterator_adaptor
+    <
+        DerivedClass,
+        Iterator,
+        boost::use_default,
+        std::conditional_t
+        <
+            std::is_convertible
+            <
+                typename boost::iterator_traversal<Iterator>::type,
+                boost::random_access_traversal_tag
+            >::value,
+            TraversalFlag,
+            boost::use_default
+        >
+    >
+{
+    // Define operator cast to Iterator to be able to write things like Iterator it = myit++
+    inline operator Iterator() const
+    {
+        return this->base();
+    }
+
+    /*inline bool operator==(Iterator const& other) const
+    {
+        return this->base() == other;
+    }
+    inline bool operator!=(Iterator const& other) const
+    {
+        return ! operator==(other);
+    }*/
+};
+
+}}}} // namespace boost::geometry::detail::iterators
+#endif
+
+
+#endif // BOOST_GEOMETRY_ITERATORS_DETAIL_ITERATOR_BASE_HPP