ceph/src/boost/libs/range/include/boost/range/algorithm/max_element.hpp

   1 //  Copyright Neil Groves 2009. 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_ALGORITHM_MAX_ELEMENT_HPP_INCLUDED
  10 #define BOOST_RANGE_ALGORITHM_MAX_ELEMENT_HPP_INCLUDED
  11
  12 #include <boost/concept_check.hpp>
  13 #include <boost/range/begin.hpp>
  14 #include <boost/range/end.hpp>
  15 #include <boost/range/concepts.hpp>
  16 #include <boost/range/detail/range_return.hpp>
  17 #include <algorithm>
  18
  19 namespace boost
  20 {
  21     namespace range
  22     {
  23
  24 /// \brief template function max_element
  25 ///
  26 /// range-based version of the max_element std algorithm
  27 ///
  28 /// \pre ForwardRange is a model of the ForwardRangeConcept
  29 /// \pre BinaryPredicate is a model of the BinaryPredicateConcept
  30 template<class ForwardRange>
  31 inline BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type
  32 max_element(ForwardRange& rng)
  33 {
  34     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
  35     return std::max_element(boost::begin(rng), boost::end(rng));
  36 }
  37
  38 /// \overload
  39 template<class ForwardRange>
  40 inline BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type
  41 max_element(const ForwardRange& rng)
  42 {
  43     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
  44     return std::max_element(boost::begin(rng), boost::end(rng));
  45 }
  46
  47 /// \overload
  48 template<class ForwardRange, class BinaryPredicate>
  49 inline BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type
  50 max_element(ForwardRange& rng, BinaryPredicate pred)
  51 {
  52     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
  53     return std::max_element(boost::begin(rng), boost::end(rng), pred);
  54 }
  55
  56 /// \overload
  57 template<class ForwardRange, class BinaryPredicate>
  58 inline BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type
  59 max_element(const ForwardRange& rng, BinaryPredicate pred)
  60 {
  61     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
  62     return std::max_element(boost::begin(rng), boost::end(rng), pred);
  63 }
  64
  65 // range_return overloads
  66
  67 /// \overload
  68 template<range_return_value re, class ForwardRange>
  69 inline BOOST_DEDUCED_TYPENAME range_return<ForwardRange,re>::type
  70 max_element(ForwardRange& rng)
  71 {
  72     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
  73     return range_return<ForwardRange,re>::pack(
  74         std::max_element(boost::begin(rng), boost::end(rng)),
  75         rng);
  76 }
  77
  78 /// \overload
  79 template<range_return_value re, class ForwardRange>
  80 inline BOOST_DEDUCED_TYPENAME range_return<const ForwardRange,re>::type
  81 max_element(const ForwardRange& rng)
  82 {
  83     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
  84     return range_return<const ForwardRange,re>::pack(
  85         std::max_element(boost::begin(rng), boost::end(rng)),
  86         rng);
  87 }
  88
  89 /// \overload
  90 template<range_return_value re, class ForwardRange, class BinaryPredicate>
  91 inline BOOST_DEDUCED_TYPENAME range_return<ForwardRange,re>::type
  92 max_element(ForwardRange& rng, BinaryPredicate pred)
  93 {
  94     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
  95     return range_return<ForwardRange,re>::pack(
  96         std::max_element(boost::begin(rng), boost::end(rng), pred),
  97         rng);
  98 }
  99
 100 /// \overload
 101 template<range_return_value re, class ForwardRange, class BinaryPredicate>
 102 inline BOOST_DEDUCED_TYPENAME range_return<const ForwardRange,re>::type
 103 max_element(const ForwardRange& rng, BinaryPredicate pred)
 104 {
 105     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
 106     return range_return<const ForwardRange,re>::pack(
 107         std::max_element(boost::begin(rng), boost::end(rng), pred),
 108         rng);
 109 }
 110
 111     } // namespace range
 112     using range::max_element;
 113 } // namespace boost
 114
 115 #endif // include guard