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1 // Copyright Neil Groves 2009. Use, modification and
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2 // distribution is subject to the Boost Software License, Version
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3 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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4 // http://www.boost.org/LICENSE_1_0.txt)
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5 //
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6 //
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7 // For more information, see http://www.boost.org/libs/range/
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8 //
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9 #ifndef BOOST_RANGE_ALGORITHM_MIN_ELEMENT_HPP_INCLUDED
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10 #define BOOST_RANGE_ALGORITHM_MIN_ELEMENT_HPP_INCLUDED
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11
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12 #include <boost/concept_check.hpp>
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13 #include <boost/range/begin.hpp>
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14 #include <boost/range/end.hpp>
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15 #include <boost/range/concepts.hpp>
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16 #include <boost/range/detail/range_return.hpp>
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17 #include <algorithm>
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18
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19 namespace boost
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20 {
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21 namespace range
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22 {
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23
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24 /// \brief template function min_element
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25 ///
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26 /// range-based version of the min_element std algorithm
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27 ///
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28 /// \pre ForwardRange is a model of the ForwardRangeConcept
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29 /// \pre BinaryPredicate is a model of the BinaryPredicateConcept
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30 template<class ForwardRange>
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31 inline BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type
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32 min_element(ForwardRange& rng)
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33 {
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34 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
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35 return std::min_element(boost::begin(rng), boost::end(rng));
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36 }
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37
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38 /// \overload
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39 template<class ForwardRange>
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40 inline BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type
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41 min_element(const ForwardRange& rng)
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42 {
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43 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
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44 return std::min_element(boost::begin(rng), boost::end(rng));
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45 }
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46
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47 /// \overload
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48 template<class ForwardRange, class BinaryPredicate>
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49 inline BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type
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50 min_element(ForwardRange& rng, BinaryPredicate pred)
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51 {
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52 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
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53 return std::min_element(boost::begin(rng), boost::end(rng), pred);
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54 }
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55
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56 /// \overload
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57 template<class ForwardRange, class BinaryPredicate>
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58 inline BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type
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59 min_element(const ForwardRange& rng, BinaryPredicate pred)
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60 {
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61 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
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62 return std::min_element(boost::begin(rng), boost::end(rng), pred);
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63 }
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64
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65 // range_return overloads
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66
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67 /// \overload
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68 template<range_return_value re, class ForwardRange>
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69 inline BOOST_DEDUCED_TYPENAME range_return<ForwardRange,re>::type
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70 min_element(ForwardRange& rng)
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71 {
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72 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
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73 return range_return<ForwardRange,re>::pack(
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74 std::min_element(boost::begin(rng), boost::end(rng)),
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75 rng);
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76 }
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77
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78 /// \overload
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79 template<range_return_value re, class ForwardRange>
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80 inline BOOST_DEDUCED_TYPENAME range_return<const ForwardRange,re>::type
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81 min_element(const ForwardRange& rng)
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82 {
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83 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
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84 return range_return<const ForwardRange,re>::pack(
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85 std::min_element(boost::begin(rng), boost::end(rng)),
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86 rng);
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87 }
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88
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89 /// \overload
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90 template<range_return_value re, class ForwardRange, class BinaryPredicate>
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91 inline BOOST_DEDUCED_TYPENAME range_return<ForwardRange,re>::type
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92 min_element(ForwardRange& rng, BinaryPredicate pred)
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93 {
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94 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
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95 return range_return<ForwardRange,re>::pack(
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96 std::min_element(boost::begin(rng), boost::end(rng), pred),
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97 rng);
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98 }
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99
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100 /// \overload
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101 template<range_return_value re, class ForwardRange, class BinaryPredicate>
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102 inline BOOST_DEDUCED_TYPENAME range_return<const ForwardRange,re>::type
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103 min_element(const ForwardRange& rng, BinaryPredicate pred)
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104 {
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105 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
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106 return range_return<const ForwardRange,re>::pack(
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107 std::min_element(boost::begin(rng), boost::end(rng), pred),
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108 rng);
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109 }
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110
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111 } // namespace range
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112 using range::min_element;
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113 } // namespace boost
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114
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115 #endif // include guard
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