boost/range/counting_range.hpp

0001 //  Copyright Neil Groves 2010. Use, modification and
0002 //  distribution is subject to the Boost Software License, Version
0003 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
0004 //  http://www.boost.org/LICENSE_1_0.txt)
0005 //
0006 //
0007 // For more information, see http://www.boost.org/libs/range/
0008 //
0009 #ifndef BOOST_RANGE_COUNTING_RANGE_HPP_INCLUDED
0010 #define BOOST_RANGE_COUNTING_RANGE_HPP_INCLUDED
0011
0012 #include <boost/config.hpp>
0013 #if BOOST_MSVC >= 1400
0014 #pragma warning(push)
0015 #pragma warning(disable : 4244)
0016 #endif
0017
0018 #include <boost/range/iterator_range_core.hpp>
0019 #include <boost/range/value_type.hpp>
0020 #include <boost/range/iterator.hpp>
0021 #include <boost/iterator/counting_iterator.hpp>
0022
0023 namespace boost
0024 {
0025     template<class Value>
0026     inline iterator_range<counting_iterator<Value> >
0027     counting_range(Value first, Value last)
0028     {
0029         typedef counting_iterator<Value> counting_iterator_t;
0030         typedef iterator_range<counting_iterator_t> result_t;
0031         return result_t(counting_iterator_t(first),
0032                         counting_iterator_t(last));
0033     }
0034
0035     template<class Range>
0036     inline iterator_range<
0037         counting_iterator<
0038             BOOST_DEDUCED_TYPENAME range_iterator<const Range>::type
0039         >
0040     >
0041     counting_range(const Range& rng)
0042     {
0043         typedef counting_iterator<
0044             BOOST_DEDUCED_TYPENAME range_iterator<const Range>::type
0045         > counting_iterator_t;
0046
0047         typedef iterator_range<counting_iterator_t> result_t;
0048
0049         return result_t(counting_iterator_t(boost::begin(rng)),
0050                         counting_iterator_t(boost::end(rng)));
0051     }
0052
0053     template<class Range>
0054     inline iterator_range<
0055         counting_iterator<
0056             BOOST_DEDUCED_TYPENAME range_iterator<Range>::type
0057         >
0058     >
0059     counting_range(Range& rng)
0060     {
0061         typedef counting_iterator<
0062             BOOST_DEDUCED_TYPENAME range_iterator<Range>::type
0063         > counting_iterator_t;
0064
0065         typedef iterator_range<counting_iterator_t> result_t;
0066
0067         return result_t(counting_iterator_t(boost::begin(rng)),
0068                         counting_iterator_t(boost::end(rng)));
0069     }
0070 } // namespace boost
0071
0072 #if BOOST_MSVC >= 1400
0073 #pragma warning(pop)
0074 #endif
0075
0076 #endif // include guard