ceph/src/boost/libs/range/include/boost/range/algorithm_ext/iota.hpp

   1 // Boost.Range library
   2 //
   3 //  Copyright Neil Groves 2009. 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)
   7 //
   8 // For more information, see http://www.boost.org/libs/range/
   9 //
  10 #ifndef BOOST_RANGE_ALGORITHM_EXT_IOTA_HPP_INCLUDED
  11 #define BOOST_RANGE_ALGORITHM_EXT_IOTA_HPP_INCLUDED
  12
  13 #include <boost/range/config.hpp>
  14 #include <boost/range/concepts.hpp>
  15 #include <boost/range/iterator.hpp>
  16 #include <boost/range/begin.hpp>
  17 #include <boost/range/end.hpp>
  18
  19 namespace boost
  20 {
  21     namespace range
  22     {
  23
  24 template< class ForwardRange, class Value >
  25 inline ForwardRange& iota( ForwardRange& rng, Value x )
  26 {
  27     BOOST_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
  28     typedef BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type iterator_t;
  29
  30     iterator_t last_target = ::boost::end(rng);
  31     for (iterator_t target = ::boost::begin(rng); target != last_target; ++target, ++x)
  32         *target = x;
  33
  34     return rng;
  35 }
  36
  37 template< class ForwardRange, class Value >
  38 inline const ForwardRange& iota( const ForwardRange& rng, Value x )
  39 {
  40     BOOST_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
  41     typedef BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type iterator_t;
  42
  43     iterator_t last_target = ::boost::end(rng);
  44     for (iterator_t target = ::boost::begin(rng); target != last_target; ++target, ++x)
  45         *target = x;
  46
  47     return rng;
  48 }
  49
  50     } // namespace range
  51     using range::iota;
  52 } // namespace boost
  53
  54 #endif // include guard