Chris@16: // Boost.Geometry Index
Chris@16: //
Chris@16: // Copyright (c) 2011-2013 Adam Wulkiewicz, Lodz, Poland.
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_INDEX_DETAIL_TRANSLATOR_HPP
Chris@16: #define BOOST_GEOMETRY_INDEX_DETAIL_TRANSLATOR_HPP
Chris@16: 
Chris@16: namespace boost { namespace geometry { namespace index {
Chris@16: 
Chris@16: namespace detail {
Chris@16: 
Chris@16: template <typename IndexableGetter, typename EqualTo>
Chris@16: struct translator
Chris@16:     : public IndexableGetter
Chris@16:     , public EqualTo
Chris@16: {
Chris@16:     typedef typename IndexableGetter::result_type result_type;
Chris@16: 
Chris@16:     translator(IndexableGetter const& i, EqualTo const& e)
Chris@16:         : IndexableGetter(i), EqualTo(e)
Chris@16:     {}
Chris@16: 
Chris@16:     template <typename Value>
Chris@16:     result_type operator()(Value const& value) const
Chris@16:     {
Chris@16:         return IndexableGetter::operator()(value);
Chris@16:     }
Chris@16: 
Chris@16:     template <typename Value>
Chris@16:     bool equals(Value const& v1, Value const& v2) const
Chris@16:     {
Chris@16:         return EqualTo::operator()(v1, v2);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template <typename IndexableGetter>
Chris@16: struct result_type
Chris@16: {
Chris@16:     typedef typename IndexableGetter::result_type type;
Chris@16: };
Chris@16: 
Chris@16: template <typename IndexableGetter>
Chris@16: struct indexable_type
Chris@16: {
Chris@16:     typedef typename boost::remove_const<
Chris@16:         typename boost::remove_reference<
Chris@16:             typename result_type<IndexableGetter>::type
Chris@16:         >::type
Chris@16:     >::type type;
Chris@16: };
Chris@16: 
Chris@16: } // namespace detail
Chris@16: 
Chris@16: }}} // namespace boost::geometry::index
Chris@16: 
Chris@16: #endif // BOOST_GEOMETRY_INDEX_DETAIL_TRANSLATOR_HPP