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- // Boost.Geometry Index
- //
- // Query range adaptor
- //
- // Copyright (c) 2011-2013 Adam Wulkiewicz, Lodz, Poland.
- //
- // 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_INDEX_ADAPTORS_QUERY_HPP
- #define BOOST_GEOMETRY_INDEX_ADAPTORS_QUERY_HPP
- /*!
- \defgroup adaptors Adaptors (boost::geometry::index::adaptors::)
- */
- namespace boost { namespace geometry { namespace index {
- namespace adaptors {
- namespace detail {
- template <typename Index>
- class query_range
- {
- BOOST_MPL_ASSERT_MSG(
- (false),
- NOT_IMPLEMENTED_FOR_THIS_INDEX,
- (query_range));
- typedef int* iterator;
- typedef const int* const_iterator;
- template <typename Predicates>
- inline query_range(
- Index const&,
- Predicates const&)
- {}
- inline iterator begin() { return 0; }
- inline iterator end() { return 0; }
- inline const_iterator begin() const { return 0; }
- inline const_iterator end() const { return 0; }
- };
- // TODO: awulkiew - consider removing reference from predicates
- template<typename Predicates>
- struct query
- {
- inline explicit query(Predicates const& pred)
- : predicates(pred)
- {}
- Predicates const& predicates;
- };
- template<typename Index, typename Predicates>
- index::adaptors::detail::query_range<Index>
- operator|(
- Index const& si,
- index::adaptors::detail::query<Predicates> const& f)
- {
- return index::adaptors::detail::query_range<Index>(si, f.predicates);
- }
- } // namespace detail
- /*!
- \brief The query index adaptor generator.
- \ingroup adaptors
- \param pred Predicates.
- */
- template <typename Predicates>
- detail::query<Predicates>
- queried(Predicates const& pred)
- {
- return detail::query<Predicates>(pred);
- }
- } // namespace adaptors
- }}} // namespace boost::geometry::index
- #endif // BOOST_GEOMETRY_INDEX_ADAPTORS_QUERY_HPP
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