3 // Copyright Thorsten Ottosen, Neil Groves 2006 - 2008. Use, modification and
4 // distribution is subject to the Boost Software License, Version
5 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt)
8 // For more information, see http://www.boost.org/libs/range/
11 #ifndef BOOST_RANGE_ADAPTOR_INDIRECTED_HPP
12 #define BOOST_RANGE_ADAPTOR_INDIRECTED_HPP
14 #include <boost/range/iterator_range.hpp>
15 #include <boost/range/concepts.hpp>
16 #include <boost/iterator/indirect_iterator.hpp>
20 namespace range_detail
23 struct indirected_range :
24 public boost::iterator_range<
25 boost::indirect_iterator<
26 BOOST_DEDUCED_TYPENAME range_iterator<R>::type
31 typedef boost::iterator_range<
32 boost::indirect_iterator<
33 BOOST_DEDUCED_TYPENAME range_iterator<R>::type
39 explicit indirected_range( R& r )
44 struct indirect_forwarder {};
46 template< class SinglePassRange >
47 inline indirected_range<SinglePassRange>
48 operator|( SinglePassRange& r, indirect_forwarder )
50 BOOST_RANGE_CONCEPT_ASSERT((
51 SinglePassRangeConcept<SinglePassRange>));
53 return indirected_range<SinglePassRange>( r );
56 template< class SinglePassRange >
57 inline indirected_range<const SinglePassRange>
58 operator|( const SinglePassRange& r, indirect_forwarder )
60 BOOST_RANGE_CONCEPT_ASSERT((
61 SinglePassRangeConcept<const SinglePassRange>));
63 return indirected_range<const SinglePassRange>( r );
68 using range_detail::indirected_range;
74 const range_detail::indirect_forwarder indirected =
75 range_detail::indirect_forwarder();
78 template<class SinglePassRange>
79 inline indirected_range<SinglePassRange>
80 indirect(SinglePassRange& rng)
82 BOOST_RANGE_CONCEPT_ASSERT((
83 SinglePassRangeConcept<SinglePassRange>));
84 return indirected_range<SinglePassRange>(rng);
87 template<class SinglePassRange>
88 inline indirected_range<const SinglePassRange>
89 indirect(const SinglePassRange& rng)
91 BOOST_RANGE_CONCEPT_ASSERT((
92 SinglePassRangeConcept<const SinglePassRange>));
94 return indirected_range<const SinglePassRange>(rng);