ceph/src/boost/libs/geometry/include/boost/geometry/index/adaptors/query.hpp

   1 // Boost.Geometry Index
   2 //
   3 // Query range adaptor
   4 //
   5 // Copyright (c) 2011-2013 Adam Wulkiewicz, Lodz, Poland.
   6 //
   7 // Use, modification and distribution is subject to the Boost Software License,
   8 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10
  11 #ifndef BOOST_GEOMETRY_INDEX_ADAPTORS_QUERY_HPP
  12 #define BOOST_GEOMETRY_INDEX_ADAPTORS_QUERY_HPP
  13
  14 /*!
  15 \defgroup adaptors Adaptors (boost::geometry::index::adaptors::)
  16 */
  17
  18 namespace boost { namespace geometry { namespace index {
  19
  20 namespace adaptors {
  21
  22 namespace detail {
  23
  24 template <typename Index>
  25 class query_range
  26 {
  27     BOOST_MPL_ASSERT_MSG(
  28         (false),
  29         NOT_IMPLEMENTED_FOR_THIS_INDEX,
  30         (query_range));
  31
  32     typedef int* iterator;
  33     typedef const int* const_iterator;
  34
  35     template <typename Predicates>
  36     inline query_range(
  37         Index const&,
  38         Predicates const&)
  39     {}
  40
  41     inline iterator begin() { return 0; }
  42     inline iterator end() { return 0; }
  43     inline const_iterator begin() const { return 0; }
  44     inline const_iterator end() const { return 0; }
  45 };
  46
  47 // TODO: awulkiew - consider removing reference from predicates
  48
  49 template<typename Predicates>
  50 struct query
  51 {
  52     inline explicit query(Predicates const& pred)
  53         : predicates(pred)
  54     {}
  55
  56     Predicates const& predicates;
  57 };
  58
  59 template<typename Index, typename Predicates>
  60 index::adaptors::detail::query_range<Index>
  61 operator|(
  62     Index const& si,
  63     index::adaptors::detail::query<Predicates> const& f)
  64 {
  65     return index::adaptors::detail::query_range<Index>(si, f.predicates);
  66 }
  67
  68 } // namespace detail
  69
  70 /*!
  71 \brief The query index adaptor generator.
  72
  73 \ingroup adaptors
  74
  75 \param pred   Predicates.
  76 */
  77 template <typename Predicates>
  78 detail::query<Predicates>
  79 queried(Predicates const& pred)
  80 {
  81     return detail::query<Predicates>(pred);
  82 }
  83
  84 } // namespace adaptors
  85
  86 }}} // namespace boost::geometry::index
  87
  88 #endif // BOOST_GEOMETRY_INDEX_ADAPTORS_QUERY_HPP