ceph/src/boost/boost/geometry/iterators/detail/iterator_base.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
   6
   7 // This file was modified by Oracle on 2020-2021.
   8 // Modifications copyright (c) 2020-2021 Oracle and/or its affiliates.
   9 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  10
  11 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  12 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  13
  14 // Use, modification and distribution is subject to the Boost Software License,
  15 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  16 // http://www.boost.org/LICENSE_1_0.txt)
  17
  18 #ifndef BOOST_GEOMETRY_ITERATORS_DETAIL_ITERATOR_BASE_HPP
  19 #define BOOST_GEOMETRY_ITERATORS_DETAIL_ITERATOR_BASE_HPP
  20
  21 #include <type_traits>
  22
  23 #include <boost/iterator/iterator_adaptor.hpp>
  24 #include <boost/iterator/iterator_categories.hpp>
  25
  26 #ifndef DOXYGEN_NO_DETAIL
  27 namespace boost { namespace geometry { namespace detail { namespace iterators
  28 {
  29
  30 template
  31 <
  32     typename DerivedClass,
  33     typename Iterator,
  34     typename TraversalFlag = boost::bidirectional_traversal_tag
  35 >
  36 struct iterator_base
  37     : public boost::iterator_adaptor
  38     <
  39         DerivedClass,
  40         Iterator,
  41         boost::use_default,
  42         std::conditional_t
  43         <
  44             std::is_convertible
  45             <
  46                 typename boost::iterator_traversal<Iterator>::type,
  47                 boost::random_access_traversal_tag
  48             >::value,
  49             TraversalFlag,
  50             boost::use_default
  51         >
  52     >
  53 {
  54     // Define operator cast to Iterator to be able to write things like Iterator it = myit++
  55     inline operator Iterator() const
  56     {
  57         return this->base();
  58     }
  59
  60     /*inline bool operator==(Iterator const& other) const
  61     {
  62         return this->base() == other;
  63     }
  64     inline bool operator!=(Iterator const& other) const
  65     {
  66         return ! operator==(other);
  67     }*/
  68 };
  69
  70 }}}} // namespace boost::geometry::detail::iterators
  71 #endif
  72
  73
  74 #endif // BOOST_GEOMETRY_ITERATORS_DETAIL_ITERATOR_BASE_HPP