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min_element.hpp
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1
2// Range v3 library
3//
4// Copyright Eric Niebler 2014-present
5//
6// Use, modification and distribution is subject to the
7// Boost Software License, Version 1.0. (See accompanying
8// file LICENSE_1_0.txt or copy at
9// http://www.boost.org/LICENSE_1_0.txt)
10//
11// Project home: https://github.com/ericniebler/range-v3
12//
13#ifndef RANGES_V3_ALGORITHM_MIN_ELEMENT_HPP
14#define RANGES_V3_ALGORITHM_MIN_ELEMENT_HPP
15
17
28#include <range/v3/utility/static_const.hpp>
29
30#include <range/v3/detail/prologue.hpp>
31
32namespace ranges
33{
36 RANGES_FUNC_BEGIN(min_element)
37
38
39 template(typename I, typename S, typename C = less, typename P = identity)(
40 requires forward_iterator<I> AND sentinel_for<S, I> AND
41 indirect_strict_weak_order<C, projected<I, P>>)
42 constexpr I RANGES_FUNC(min_element)(I first, S last, C pred = C{}, P proj = P{})
43 {
44 if(first != last)
45 for(auto tmp = next(first); tmp != last; ++tmp)
46 if(invoke(pred, invoke(proj, *tmp), invoke(proj, *first)))
47 first = tmp;
48 return first;
49 }
50
52 template(typename Rng, typename C = less, typename P = identity)(
53 requires forward_range<Rng> AND
54 indirect_strict_weak_order<C, projected<iterator_t<Rng>, P>>)
55 constexpr borrowed_iterator_t<Rng> //
56 RANGES_FUNC(min_element)(Rng && rng, C pred = C{}, P proj = P{}) //
57 {
58 return (*this)(begin(rng), end(rng), std::move(pred), std::move(proj));
59 }
60
61 RANGES_FUNC_END(min_element)
62
63 namespace cpp20
64 {
65 using ranges::min_element;
66 }
68} // namespace ranges
69
70#include <range/v3/detail/epilogue.hpp>
71
72#endif
typename Fn::template invoke< Args... > invoke
Evaluate the invocable Fn with the arguments Args.
Definition meta.hpp:541
front< Pair > first
Retrieve the first element of the pair Pair.
Definition meta.hpp:2251
bool_<(T::type::value< U::type::value)> less
A Boolean integral constant wrapper around true if T::type::value is less than U::type::value; false,...
Definition meta.hpp:255