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adjacent_find.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_ADJACENT_FIND_HPP
14#define RANGES_V3_ALGORITHM_ADJACENT_FIND_HPP
15
17
26#include <range/v3/utility/static_const.hpp>
27
28#include <range/v3/detail/prologue.hpp>
29
30namespace ranges
31{
34 RANGES_FUNC_BEGIN(adjacent_find)
41 template(typename I, typename S, typename C = equal_to, typename P = identity)(
42 requires forward_iterator<I> AND sentinel_for<S, I> AND
43 indirect_relation<C, projected<I, P>>)
44 constexpr I RANGES_FUNC(adjacent_find)(I first, S last, C pred = C{}, P proj = P{})
45 {
46 if(first == last)
47 return first;
48 auto inext = first;
49 for(; ++inext != last; first = inext)
50 if(invoke(pred, invoke(proj, *first), invoke(proj, *inext)))
51 return first;
52 return inext;
53 }
54
56 template(typename Rng, typename C = equal_to, typename P = identity)(
57 requires forward_range<Rng> AND
58 indirect_relation<C, projected<iterator_t<Rng>, P>>)
59 constexpr borrowed_iterator_t<Rng> //
60 RANGES_FUNC(adjacent_find)(Rng && rng, C pred = C{}, P proj = P{}) //
61 {
62 return (*this)(begin(rng), end(rng), std::move(pred), std::move(proj));
63 }
64 RANGES_FUNC_END(adjacent_find)
65
66 namespace cpp20
67 {
68 using ranges::adjacent_find;
69 }
71} // namespace ranges
72
73#include <range/v3/detail/epilogue.hpp>
74
75#endif // RANGE_ALGORITHM_ADJACENT_FIND_HPP
The forward_iterator concept.
The forward_range concept.
The indirect_relation concept.
The sentinel_for concept.
decltype(begin(declval(Rng &))) iterator_t
Definition access.hpp:698
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
Definition comparisons.hpp:28
Definition identity.hpp:25