ceph/src/boost/libs/detail/include/boost/detail/is_sorted.hpp

   1 /*==============================================================================
   2     Copyright (c) 2010-2011 Bryce Lelbach
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7
   8 #ifndef BOOST_DETAIL_SORTED_HPP
   9 #define BOOST_DETAIL_SORTED_HPP
  10
  11 #include <boost/detail/iterator.hpp>
  12
  13 #include <functional>
  14
  15 namespace boost {
  16 namespace detail {
  17
  18 template<class Iterator, class Comp>
  19 inline Iterator is_sorted_until (Iterator first, Iterator last, Comp c) {
  20   if (first == last)
  21     return last;
  22
  23   Iterator it = first; ++it;
  24
  25   for (; it != last; first = it, ++it)
  26     if (c(*it, *first))
  27       return it;
  28
  29   return it;
  30 }
  31
  32 template<class Iterator>
  33 inline Iterator is_sorted_until (Iterator first, Iterator last) {
  34   typedef typename boost::detail::iterator_traits<Iterator>::value_type
  35     value_type;
  36
  37   typedef std::less<value_type> c;
  38
  39   return ::boost::detail::is_sorted_until(first, last, c());
  40 }
  41
  42 template<class Iterator, class Comp>
  43 inline bool is_sorted (Iterator first, Iterator last, Comp c) {
  44   return ::boost::detail::is_sorted_until(first, last, c) == last;
  45 }
  46
  47 template<class Iterator>
  48 inline bool is_sorted (Iterator first, Iterator last) {
  49   return ::boost::detail::is_sorted_until(first, last) == last;
  50 }
  51
  52 } // detail
  53 } // boost
  54
  55 #endif // BOOST_DETAIL_SORTED_HPP
  56