git.sesse.net Git - casparcg/blob - dependencies/boost/boost/range/counting_range.hpp

   1 //  Copyright Neil Groves 2010. Use, modification and
   2 //  distribution is subject to the Boost Software License, Version
   3 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5 //
   6 //
   7 // For more information, see http://www.boost.org/libs/range/
   8 //
   9 #ifndef BOOST_RANGE_COUNTING_RANGE_HPP_INCLUDED
  10 #define BOOST_RANGE_COUNTING_RANGE_HPP_INCLUDED
  11
  12 #include <boost/config.hpp>
  13 #if BOOST_MSVC >= 1400
  14 #pragma warning(push)
  15 #pragma warning(disable : 4244)
  16 #endif
  17
  18 #include <boost/range/iterator_range_core.hpp>
  19 #include <boost/range/value_type.hpp>
  20 #include <boost/iterator/counting_iterator.hpp>
  21 #include <boost/utility.hpp>
  22
  23 namespace boost
  24 {
  25
  26     template<class Value>
  27     inline iterator_range<counting_iterator<Value> >
  28     counting_range(Value first, Value last)
  29     {
  30         typedef counting_iterator<Value> counting_iterator_t;
  31         typedef iterator_range<counting_iterator_t> result_t;
  32         return result_t(counting_iterator_t(first),
  33                         counting_iterator_t(last));
  34     }
  35
  36     template<class Range>
  37     inline iterator_range<counting_iterator<BOOST_DEDUCED_TYPENAME range_value<const Range>::type> >
  38     counting_range(const Range& rng)
  39     {
  40         typedef counting_iterator<BOOST_DEDUCED_TYPENAME range_value<const Range>::type> counting_iterator_t;
  41         typedef iterator_range<counting_iterator_t> result_t;
  42         return boost::empty(rng)
  43             ? result_t()
  44             : result_t(
  45                 counting_iterator_t(*boost::begin(rng)),
  46                 counting_iterator_t(*boost::prior(boost::end(rng))));
  47     }
  48
  49     template<class Range>
  50     inline iterator_range<counting_iterator<BOOST_DEDUCED_TYPENAME range_value<Range>::type> >
  51     counting_range(Range& rng)
  52     {
  53         typedef counting_iterator<BOOST_DEDUCED_TYPENAME range_value<Range>::type> counting_iterator_t;
  54         typedef iterator_range<counting_iterator_t> result_t;
  55         return boost::empty(rng)
  56             ? result_t()
  57             : result_t(
  58                 counting_iterator_t(*boost::begin(rng)),
  59                 counting_iterator_t(*boost::prior(boost::end(rng))));
  60     }
  61 } // namespace boost
  62
  63 #if BOOST_MSVC >= 1400
  64 #pragma warning(pop)
  65 #endif
  66
  67 #endif // include guard