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algorithm
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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_ALGORITHM
#define _LIBCPP_ALGORITHM
/*
algorithm synopsis
#include <initializer_list>
namespace std
{
namespace ranges {
// [algorithms.results], algorithm result types
template <class I, class F>
struct in_fun_result; // since C++20
template <class I1, class I2>
struct in_in_result; // since C++20
template <class I, class O>
struct in_out_result; // since C++20
template <class I1, class I2, class O>
struct in_in_out_result; // since C++20
template <class I, class O1, class O2>
struct in_out_out_result; // since C++20
template <class I1, class I2>
struct min_max_result; // since C++20
template <class I>
struct in_found_result; // since C++20
template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less> // since C++20
constexpr I min_element(I first, S last, Comp comp = {}, Proj proj = {});
template<forward_range R, class Proj = identity,
indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less> // since C++20
constexpr borrowed_iterator_t<R> min_element(R&& r, Comp comp = {}, Proj proj = {});
template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
constexpr I ranges::max_element(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<forward_range R, class Proj = identity,
indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
constexpr borrowed_iterator_t<R> ranges::max_element(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<class I1, class I2>
using mismatch_result = in_in_result<I1, I2>;
template <input_iterator I1, sentinel_for<_I1> S1, input_iterator I2, sentinel_for<_I2> S2,
class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
constexpr mismatch_result<_I1, _I2> // since C++20
mismatch()(I1 first1, S1 last1, I2 first2, S2 last2, Pred pred = {}, Proj1 proj1 = {}, Proj2 proj2 = {})
template <input_range R1, input_range R2,
class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
constexpr mismatch_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>>
mismatch(R1&& r1, R2&& r2, Pred pred = {}, Proj1 proj1 = {}, Proj2 proj2 = {}) // since C++20
requires indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T*>
constexpr I find(I first, S last, const T& value, Proj proj = {}); // since C++20
template<input_range R, class T, class Proj = identity>
requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<R>, Proj>, const T*>
constexpr borrowed_iterator_t<R>
find(R&& r, const T& value, Proj proj = {}); // since C++20
template<input_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
constexpr I find_if(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
constexpr borrowed_iterator_t<R>
find_if(R&& r, Pred pred, Proj proj = {}); // since C++20
template<input_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
constexpr I find_if_not(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
constexpr borrowed_iterator_t<R>
find_if_not(R&& r, Pred pred, Proj proj = {}); // since C++20
template<class T, class Proj = identity,
indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
constexpr const T& min(const T& a, const T& b, Comp comp = {}, Proj proj = {}); // since C++20
template<copyable T, class Proj = identity,
indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
constexpr T min(initializer_list<T> r, Comp comp = {}, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
requires indirectly_copyable_storable<iterator_t<R>, range_value_t<R>*>
constexpr range_value_t<R>
min(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<class T, class Proj = identity,
indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
constexpr const T& max(const T& a, const T& b, Comp comp = {}, Proj proj = {}); // since C++20
template<copyable T, class Proj = identity,
indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
constexpr T max(initializer_list<T> r, Comp comp = {}, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
requires indirectly_copyable_storable<iterator_t<R>, range_value_t<R>*>
constexpr range_value_t<R>
max(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<class I, class O>
using unary_transform_result = in_out_result<I, O>; // since C++20
template<class I1, class I2, class O>
using binary_transform_result = in_in_out_result<I1, I2, O>; // since C++20
template<input_iterator I, sentinel_for<I> S, weakly_incrementable O,
copy_constructible F, class Proj = identity>
requires indirectly_writable<O, indirect_result_t<F&, projected<I, Proj>>>
constexpr ranges::unary_transform_result<I, O>
transform(I first1, S last1, O result, F op, Proj proj = {}); // since C++20
template<input_range R, weakly_incrementable O, copy_constructible F,
class Proj = identity>
requires indirectly_writable<O, indirect_result_t<F&, projected<iterator_t<R>, Proj>>>
constexpr ranges::unary_transform_result<borrowed_iterator_t<R>, O>
transform(R&& r, O result, F op, Proj proj = {}); // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
weakly_incrementable O, copy_constructible F, class Proj1 = identity,
class Proj2 = identity>
requires indirectly_writable<O, indirect_result_t<F&, projected<I1, Proj1>,
projected<I2, Proj2>>>
constexpr ranges::binary_transform_result<I1, I2, O>
transform(I1 first1, S1 last1, I2 first2, S2 last2, O result,
F binary_op, Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_range R1, input_range R2, weakly_incrementable O,
copy_constructible F, class Proj1 = identity, class Proj2 = identity>
requires indirectly_writable<O, indirect_result_t<F&, projected<iterator_t<R1>, Proj1>,
projected<iterator_t<R2>, Proj2>>>
constexpr ranges::binary_transform_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>, O>
transform(R1&& r1, R2&& r2, O result,
F binary_op, Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_iterator I, sentinel_for<I> S, class T, class Proj = identity>
requires indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T*>
constexpr iter_difference_t<I>
count(I first, S last, const T& value, Proj proj = {}); // since C++20
template<input_range R, class T, class Proj = identity>
requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<R>, Proj>, const T*>
constexpr range_difference_t<R>
count(R&& r, const T& value, Proj proj = {}); // since C++20
template<input_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
constexpr iter_difference_t<I>
count_if(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
constexpr range_difference_t<R>
count_if(R&& r, Pred pred, Proj proj = {}); // since C++20
template<class T>
using minmax_result = min_max_result<T>;
template<class T, class Proj = identity,
indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
constexpr ranges::minmax_result<const T&>
minmax(const T& a, const T& b, Comp comp = {}, Proj proj = {}); // since C++20
template<copyable T, class Proj = identity,
indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
constexpr ranges::minmax_result<T>
minmax(initializer_list<T> r, Comp comp = {}, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
requires indirectly_copyable_storable<iterator_t<R>, range_value_t<R>*>
constexpr ranges::minmax_result<range_value_t<R>>
minmax(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<class I>
using minmax_element_result = min_max_result<I>;
template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
constexpr ranges::minmax_element_result<I>
minmax_element(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<forward_range R, class Proj = identity,
indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
constexpr ranges::minmax_element_result<borrowed_iterator_t<R>>
minmax_element(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<class I, class O>
using copy_result = in_out_result<I, O>; // since C++20
template<class I, class O>
using copy_n_result = in_out_result<I, O>; // since C++20
template<class I, class O>
using copy_if_result = in_out_result<I, O>; // since C++20
template<class I1, class I2>
using copy_backward_result = in_out_result<I1, I2>; // since C++20
template<input_iterator I, sentinel_for<I> S, weakly_incrementable O>
requires indirectly_copyable<I, O>
constexpr ranges::copy_result<I, O> ranges::copy(I first, S last, O result); // since C++20
template<input_range R, weakly_incrementable O>
requires indirectly_copyable<iterator_t<R>, O>
constexpr ranges::copy_result<borrowed_iterator_t<R>, O> ranges::copy(R&& r, O result); // since C++20
template<input_iterator I, weakly_incrementable O>
requires indirectly_copyable<I, O>
constexpr ranges::copy_n_result<I, O>
ranges::copy_n(I first, iter_difference_t<I> n, O result); // since C++20
template<input_iterator I, sentinel_for<I> S, weakly_incrementable O, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
requires indirectly_copyable<I, O>
constexpr ranges::copy_if_result<I, O>
ranges::copy_if(I first, S last, O result, Pred pred, Proj proj = {}); // since C++20
template<input_range R, weakly_incrementable O, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
requires indirectly_copyable<iterator_t<R>, O>
constexpr ranges::copy_if_result<borrowed_iterator_t<R>, O>
ranges::copy_if(R&& r, O result, Pred pred, Proj proj = {}); // since C++20
template<bidirectional_iterator I1, sentinel_for<I1> S1, bidirectional_iterator I2>
requires indirectly_copyable<I1, I2>
constexpr ranges::copy_backward_result<I1, I2>
ranges::copy_backward(I1 first, S1 last, I2 result); // since C++20
template<bidirectional_range R, bidirectional_iterator I>
requires indirectly_copyable<iterator_t<R>, I>
constexpr ranges::copy_backward_result<borrowed_iterator_t<R>, I>
ranges::copy_backward(R&& r, I result); // since C++20
template<class I, class F>
using for_each_result = in_fun_result<I, F>; // since C++20
template<input_iterator I, sentinel_for<I> S, class Proj = identity,
indirectly_unary_invocable<projected<I, Proj>> Fun>
constexpr ranges::for_each_result<I, Fun>
ranges::for_each(I first, S last, Fun f, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirectly_unary_invocable<projected<iterator_t<R>, Proj>> Fun>
constexpr ranges::for_each_result<borrowed_iterator_t<R>, Fun>
ranges::for_each(R&& r, Fun f, Proj proj = {}); // since C++20
template<input_iterator I, class Proj = identity,
indirectly_unary_invocable<projected<I, Proj>> Fun>
constexpr ranges::for_each_n_result<I, Fun>
ranges::for_each_n(I first, iter_difference_t<I> n, Fun f, Proj proj = {}); // since C++20
template<input_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
constexpr bool ranges::is_partitioned(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
constexpr bool ranges::is_partitioned(R&& r, Pred pred, Proj proj = {}); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
class Proj = identity>
requires sortable<I, Comp, Proj>
constexpr I
ranges::push_heap(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_range R, class Comp = ranges::less, class Proj = identity>
requires sortable<iterator_t<R>, Comp, Proj>
constexpr borrowed_iterator_t<R>
ranges::push_heap(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
class Proj = identity>
requires sortable<I, Comp, Proj>
constexpr I
ranges::pop_heap(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_range R, class Comp = ranges::less, class Proj = identity>
requires sortable<iterator_t<R>, Comp, Proj>
constexpr borrowed_iterator_t<R>
ranges::pop_heap(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
class Proj = identity>
requires sortable<I, Comp, Proj>
constexpr I
ranges::make_heap(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_range R, class Comp = ranges::less, class Proj = identity>
requires sortable<iterator_t<R>, Comp, Proj>
constexpr borrowed_iterator_t<R>
ranges::make_heap(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
class Proj = identity>
requires sortable<I, Comp, Proj>
constexpr I
ranges::sort_heap(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_range R, class Comp = ranges::less, class Proj = identity>
requires sortable<iterator_t<R>, Comp, Proj>
constexpr borrowed_iterator_t<R>
ranges::sort_heap(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
constexpr bool is_heap(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_range R, class Proj = identity,
indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
constexpr bool is_heap(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
constexpr I is_heap_until(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_range R, class Proj = identity,
indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
constexpr borrowed_iterator_t<R>
is_heap_until(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<bidirectional_iterator I, sentinel_for<I> S>
requires permutable<I>
constexpr I ranges::reverse(I first, S last); // since C++20
template<bidirectional_range R>
requires permutable<iterator_t<R>>
constexpr borrowed_iterator_t<R> ranges::reverse(R&& r); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
class Proj = identity>
requires sortable<I, Comp, Proj>
constexpr I
ranges::sort(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_range R, class Comp = ranges::less, class Proj = identity>
requires sortable<iterator_t<R>, Comp, Proj>
constexpr borrowed_iterator_t<R>
ranges::sort(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
class Proj = identity>
requires sortable<I, Comp, Proj>
I ranges::stable_sort(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_range R, class Comp = ranges::less, class Proj = identity>
requires sortable<iterator_t<R>, Comp, Proj>
borrowed_iterator_t<R>
ranges::stable_sort(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
class Proj = identity>
requires sortable<I, Comp, Proj>
constexpr I
ranges::partial_sort(I first, I middle, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_range R, class Comp = ranges::less, class Proj = identity>
requires sortable<iterator_t<R>, Comp, Proj>
constexpr borrowed_iterator_t<R>
ranges::partial_sort(R&& r, iterator_t<R> middle, Comp comp = {}, Proj proj = {}); // since C++20
template<class T, output_iterator<const T&> O, sentinel_for<O> S>
constexpr O ranges::fill(O first, S last, const T& value); // since C++20
template<class T, output_range<const T&> R>
constexpr borrowed_iterator_t<R> ranges::fill(R&& r, const T& value); // since C++20
template<class T, output_iterator<const T&> O>
constexpr O ranges::fill_n(O first, iter_difference_t<O> n, const T& value); // since C++20
template<input_or_output_iterator O, sentinel_for<O> S, copy_constructible F>
requires invocable<F&> && indirectly_writable<O, invoke_result_t<F&>>
constexpr O generate(O first, S last, F gen); // since C++20
template<class ExecutionPolicy, class ForwardIterator, class Generator>
void generate(ExecutionPolicy&& exec,
ForwardIterator first, ForwardIterator last,
Generator gen); // since C++17
template<class R, copy_constructible F>
requires invocable<F&> && output_range<R, invoke_result_t<F&>>
constexpr borrowed_iterator_t<R> generate(R&& r, F gen); // since C++20
template<input_or_output_iterator O, copy_constructible F>
requires invocable<F&> && indirectly_writable<O, invoke_result_t<F&>>
constexpr O generate_n(O first, iter_difference_t<O> n, F gen); // since C++20
template<class ExecutionPolicy, class ForwardIterator, class Size, class Generator>
ForwardIterator generate_n(ExecutionPolicy&& exec,
ForwardIterator first, Size n, Generator gen); // since C++17
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
constexpr bool ranges::equal(I1 first1, S1 last1, I2 first2, S2 last2,
Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_range R1, input_range R2, class Pred = ranges::equal_to,
class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
constexpr bool ranges::equal(R1&& r1, R2&& r2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
constexpr bool ranges::all_of(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
constexpr bool ranges::all_of(R&& r, Pred pred, Proj proj = {}); // since C++20
template<input_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
constexpr bool ranges::any_of(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
constexpr bool ranges::any_of(R&& r, Pred pred, Proj proj = {}); // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
requires (forward_iterator<I1> || sized_sentinel_for<S1, I1>) &&
(forward_iterator<I2> || sized_sentinel_for<S2, I2>) &&
indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
constexpr bool ranges::ends_with(I1 first1, S1 last1, I2 first2, S2 last2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++23
template<input_range R1, input_range R2, class Pred = ranges::equal_to, class Proj1 = identity,
class Proj2 = identity>
requires (forward_range<R1> || sized_range<R1>) &&
(forward_range<R2> || sized_range<R2>) &&
indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
constexpr bool ranges::ends_with(R1&& r1, R2&& r2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++23
template<input_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
constexpr bool ranges::none_of(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<input_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
constexpr bool ranges::none_of(R&& r, Pred pred, Proj proj = {}); // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
constexpr bool ranges::starts_with(I1 first1, S1 last1, I2 first2, S2 last2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++23
template<input_range R1, input_range R2, class Pred = ranges::equal_to, class Proj1 = identity,
class Proj2 = identity>
requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
constexpr bool ranges::starts_with(R1&& r1, R2&& r2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++23
template<input_iterator I1, sentinel_for<I1> S1,
random_access_iterator I2, sentinel_for<I2> S2,
class Comp = ranges::less, class Proj1 = identity, class Proj2 = identity>
requires indirectly_copyable<I1, I2> && sortable<I2, Comp, Proj2> &&
indirect_strict_weak_order<Comp, projected<I1, Proj1>, projected<I2, Proj2>>
constexpr partial_sort_copy_result<I1, I2>
partial_sort_copy(I1 first, S1 last, I2 result_first, S2 result_last,
Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_range R1, random_access_range R2, class Comp = ranges::less,
class Proj1 = identity, class Proj2 = identity>
requires indirectly_copyable<iterator_t<R1>, iterator_t<R2>> &&
sortable<iterator_t<R2>, Comp, Proj2> &&
indirect_strict_weak_order<Comp, projected<iterator_t<R1>, Proj1>,
projected<iterator_t<R2>, Proj2>>
constexpr partial_sort_copy_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>>
partial_sort_copy(R1&& r, R2&& result_r, Comp comp = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
constexpr bool ranges::is_sorted(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<forward_range R, class Proj = identity,
indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
constexpr bool ranges::is_sorted(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
constexpr I ranges::is_sorted_until(I first, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<forward_range R, class Proj = identity,
indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
constexpr borrowed_iterator_t<R>
ranges::is_sorted_until(R&& r, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
class Proj = identity>
requires sortable<I, Comp, Proj>
constexpr I
ranges::nth_element(I first, I nth, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<random_access_range R, class Comp = ranges::less, class Proj = identity>
requires sortable<iterator_t<R>, Comp, Proj>
constexpr borrowed_iterator_t<R>
ranges::nth_element(R&& r, iterator_t<R> nth, Comp comp = {}, Proj proj = {}); // since C++20
template<forward_iterator I, sentinel_for<I> S, class T, class Proj = identity,
indirect_strict_weak_order<const T*, projected<I, Proj>> Comp = ranges::less> // since C++20
constexpr I upper_bound(I first, S last, const T& value, Comp comp = {}, Proj proj = {});
template<forward_range R, class T, class Proj = identity,
indirect_strict_weak_order<const T*, projected<iterator_t<R>, Proj>> Comp =
ranges::less>
constexpr borrowed_iterator_t<R>
upper_bound(R&& r, const T& value, Comp comp = {}, Proj proj = {}); // since C++20
template<forward_iterator I, sentinel_for<I> S, class T, class Proj = identity,
indirect_strict_weak_order<const T*, projected<I, Proj>> Comp = ranges::less>
constexpr I lower_bound(I first, S last, const T& value, Comp comp = {},
Proj proj = {}); // since C++20
template<forward_range R, class T, class Proj = identity,
indirect_strict_weak_order<const T*, projected<iterator_t<R>, Proj>> Comp =
ranges::less>
constexpr borrowed_iterator_t<R>
lower_bound(R&& r, const T& value, Comp comp = {}, Proj proj = {}); // since C++20
template<forward_iterator I, sentinel_for<I> S, class T, class Proj = identity,
indirect_strict_weak_order<const T*, projected<I, Proj>> Comp = ranges::less>
constexpr bool binary_search(I first, S last, const T& value, Comp comp = {},
Proj proj = {}); // since C++20
template<forward_range R, class T, class Proj = identity,
indirect_strict_weak_order<const T*, projected<iterator_t<R>, Proj>> Comp =
ranges::less>
constexpr bool binary_search(R&& r, const T& value, Comp comp = {},
Proj proj = {}); // since C++20
template<permutable I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
constexpr subrange<I>
partition(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<forward_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
requires permutable<iterator_t<R>>
constexpr borrowed_subrange_t<R>
partition(R&& r, Pred pred, Proj proj = {}); // since C++20
template<bidirectional_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
requires permutable<I>
subrange<I> stable_partition(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<bidirectional_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
requires permutable<iterator_t<R>>
borrowed_subrange_t<R> stable_partition(R&& r, Pred pred, Proj proj = {}); // since C++20
template<input_iterator I1, sentinel_for<I1> S1, forward_iterator I2, sentinel_for<I2> S2,
class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
constexpr I1 ranges::find_first_of(I1 first1, S1 last1, I2 first2, S2 last2,
Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_range R1, forward_range R2,
class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
constexpr borrowed_iterator_t<R1>
ranges::find_first_of(R1&& r1, R2&& r2,
Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_binary_predicate<projected<I, Proj>,
projected<I, Proj>> Pred = ranges::equal_to>
constexpr I ranges::adjacent_find(I first, S last, Pred pred = {}, Proj proj = {}); // since C++20
template<forward_range R, class Proj = identity,
indirect_binary_predicate<projected<iterator_t<R>, Proj>,
projected<iterator_t<R>, Proj>> Pred = ranges::equal_to>
constexpr borrowed_iterator_t<R> ranges::adjacent_find(R&& r, Pred pred = {}, Proj proj = {}); // since C++20
template<input_iterator I, sentinel_for<I> S, class T1, class T2, class Proj = identity>
requires indirectly_writable<I, const T2&> &&
indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T1*>
constexpr I
ranges::replace(I first, S last, const T1& old_value, const T2& new_value, Proj proj = {}); // since C++20
template<input_range R, class T1, class T2, class Proj = identity>
requires indirectly_writable<iterator_t<R>, const T2&> &&
indirect_binary_predicate<ranges::equal_to, projected<iterator_t<R>, Proj>, const T1*>
constexpr borrowed_iterator_t<R>
ranges::replace(R&& r, const T1& old_value, const T2& new_value, Proj proj = {}); // since C++20
template<input_iterator I, sentinel_for<I> S, class T, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
requires indirectly_writable<I, const T&>
constexpr I ranges::replace_if(I first, S last, Pred pred, const T& new_value, Proj proj = {}); // since C++20
template<input_range R, class T, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
requires indirectly_writable<iterator_t<R>, const T&>
constexpr borrowed_iterator_t<R>
ranges::replace_if(R&& r, Pred pred, const T& new_value, Proj proj = {}); // since C++20
template<class T, class Proj = identity,
indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
constexpr const T&
ranges::clamp(const T& v, const T& lo, const T& hi, Comp comp = {}, Proj proj = {}); // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
class Proj1 = identity, class Proj2 = identity,
indirect_strict_weak_order<projected<I1, Proj1>,
projected<I2, Proj2>> Comp = ranges::less>
constexpr bool
ranges::lexicographical_compare(I1 first1, S1 last1, I2 first2, S2 last2,
Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_range R1, input_range R2, class Proj1 = identity,
class Proj2 = identity,
indirect_strict_weak_order<projected<iterator_t<R1>, Proj1>,
projected<iterator_t<R2>, Proj2>> Comp = ranges::less>
constexpr bool
ranges::lexicographical_compare(R1&& r1, R2&& r2, Comp comp = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<bidirectional_iterator I1, sentinel_for<I1> S1, bidirectional_iterator I2>
requires indirectly_movable<I1, I2>
constexpr ranges::move_backward_result<I1, I2>
ranges::move_backward(I1 first, S1 last, I2 result); // since C++20
template<bidirectional_range R, bidirectional_iterator I>
requires indirectly_movable<iterator_t<R>, I>
constexpr ranges::move_backward_result<borrowed_iterator_t<R>, I>
ranges::move_backward(R&& r, I result); // since C++20
template<input_iterator I, sentinel_for<I> S, weakly_incrementable O>
requires indirectly_movable<I, O>
constexpr ranges::move_result<I, O>
ranges::move(I first, S last, O result); // since C++20
template<input_range R, weakly_incrementable O>
requires indirectly_movable<iterator_t<R>, O>
constexpr ranges::move_result<borrowed_iterator_t<R>, O>
ranges::move(R&& r, O result); // since C++20
template<class I, class O1, class O2>
using partition_copy_result = in_out_out_result<I, O1, O2>; // since C++20
template<input_iterator I, sentinel_for<I> S,
weakly_incrementable O1, weakly_incrementable O2,
class Proj = identity, indirect_unary_predicate<projected<I, Proj>> Pred>
requires indirectly_copyable<I, O1> && indirectly_copyable<I, O2>
constexpr partition_copy_result<I, O1, O2>
partition_copy(I first, S last, O1 out_true, O2 out_false, Pred pred,
Proj proj = {}); // since C++20
template<input_range R, weakly_incrementable O1, weakly_incrementable O2,
class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
requires indirectly_copyable<iterator_t<R>, O1> &&
indirectly_copyable<iterator_t<R>, O2>
constexpr partition_copy_result<borrowed_iterator_t<R>, O1, O2>
partition_copy(R&& r, O1 out_true, O2 out_false, Pred pred, Proj proj = {}); // since C++20
template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
constexpr I partition_point(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<forward_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
constexpr borrowed_iterator_t<R>
partition_point(R&& r, Pred pred, Proj proj = {}); // since C++20
template<class I1, class I2, class O>
using merge_result = in_in_out_result<I1, I2, O>; // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
weakly_incrementable O, class Comp = ranges::less, class Proj1 = identity,
class Proj2 = identity>
requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
constexpr merge_result<I1, I2, O>
merge(I1 first1, S1 last1, I2 first2, S2 last2, O result,
Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_range R1, input_range R2, weakly_incrementable O, class Comp = ranges::less,
class Proj1 = identity, class Proj2 = identity>
requires mergeable<iterator_t<R1>, iterator_t<R2>, O, Comp, Proj1, Proj2>
constexpr merge_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>, O>
merge(R1&& r1, R2&& r2, O result,
Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<permutable I, sentinel_for<I> S, class T, class Proj = identity>
requires indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T*>
constexpr subrange<I> ranges::remove(I first, S last, const T& value, Proj proj = {}); // since C++20
template<forward_range R, class T, class Proj = identity>
requires permutable<iterator_t<R>> &&
indirect_binary_predicate<ranges::equal_to, projected<iterator_t<R>, Proj>, const T*>
constexpr borrowed_subrange_t<R>
ranges::remove(R&& r, const T& value, Proj proj = {}); // since C++20
template<permutable I, sentinel_for<I> S, class Proj = identity,
indirect_unary_predicate<projected<I, Proj>> Pred>
constexpr subrange<I> ranges::remove_if(I first, S last, Pred pred, Proj proj = {}); // since C++20
template<forward_range R, class Proj = identity,
indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
requires permutable<iterator_t<R>>
constexpr borrowed_subrange_t<R>
ranges::remove_if(R&& r, Pred pred, Proj proj = {}); // since C++20
template<class I, class O>
using set_difference_result = in_out_result<I, O>; // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
weakly_incrementable O, class Comp = ranges::less,
class Proj1 = identity, class Proj2 = identity>
requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
constexpr set_difference_result<I1, O>
set_difference(I1 first1, S1 last1, I2 first2, S2 last2, O result,
Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_range R1, input_range R2, weakly_incrementable O,
class Comp = ranges::less, class Proj1 = identity, class Proj2 = identity>
requires mergeable<iterator_t<R1>, iterator_t<R2>, O, Comp, Proj1, Proj2>
constexpr set_difference_result<borrowed_iterator_t<R1>, O>
set_difference(R1&& r1, R2&& r2, O result,
Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<class I1, class I2, class O>
using set_intersection_result = in_in_out_result<I1, I2, O>; // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
weakly_incrementable O, class Comp = ranges::less,
class Proj1 = identity, class Proj2 = identity>
requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
constexpr set_intersection_result<I1, I2, O>
set_intersection(I1 first1, S1 last1, I2 first2, S2 last2, O result,
Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
weakly_incrementable O, class Comp = ranges::less,
class Proj1 = identity, class Proj2 = identity>
requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
constexpr set_intersection_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>, O>
set_intersection(R1&& r1, R2&& r2, O result,
Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template <class _InIter, class _OutIter>
using reverse_copy_result = in_out_result<_InIter, _OutIter>; // since C++20
template<bidirectional_iterator I, sentinel_for<I> S, weakly_incrementable O>
requires indirectly_copyable<I, O>
constexpr ranges::reverse_copy_result<I, O>
ranges::reverse_copy(I first, S last, O result); // since C++20
template<bidirectional_range R, weakly_incrementable O>
requires indirectly_copyable<iterator_t<R>, O>
constexpr ranges::reverse_copy_result<borrowed_iterator_t<R>, O>
ranges::reverse_copy(R&& r, O result); // since C++20
template<permutable I, sentinel_for<I> S>
constexpr subrange<I> rotate(I first, I middle, S last); // since C++20
template<forward_range R>
requires permutable<iterator_t<R>>
constexpr borrowed_subrange_t<R> rotate(R&& r, iterator_t<R> middle); // since C++20
template <class _InIter, class _OutIter>
using rotate_copy_result = in_out_result<_InIter, _OutIter>; // since C++20
template<forward_iterator I, sentinel_for<I> S, weakly_incrementable O>
requires indirectly_copyable<I, O>
constexpr ranges::rotate_copy_result<I, O>
ranges::rotate_copy(I first, I middle, S last, O result); // since C++20
template<forward_range R, weakly_incrementable O>
requires indirectly_copyable<iterator_t<R>, O>
constexpr ranges::rotate_copy_result<borrowed_iterator_t<R>, O>
ranges::rotate_copy(R&& r, iterator_t<R> middle, O result); // since C++20
template<input_iterator I, sentinel_for<I> S, weakly_incrementable O, class Gen>
requires (forward_iterator<I> || random_access_iterator<O>) &&
indirectly_copyable<I, O> &&
uniform_random_bit_generator<remove_reference_t<Gen>>
O sample(I first, S last, O out, iter_difference_t<I> n, Gen&& g); // since C++20
template<input_range R, weakly_incrementable O, class Gen>
requires (forward_range<R> || random_access_iterator<O>) &&
indirectly_copyable<iterator_t<R>, O> &&
uniform_random_bit_generator<remove_reference_t<Gen>>
O sample(R&& r, O out, range_difference_t<R> n, Gen&& g); // since C++20
template<random_access_iterator I, sentinel_for<I> S, class Gen>
requires permutable<I> &&
uniform_random_bit_generator<remove_reference_t<Gen>>
I shuffle(I first, S last, Gen&& g); // since C++20
template<random_access_range R, class Gen>
requires permutable<iterator_t<R>> &&
uniform_random_bit_generator<remove_reference_t<Gen>>
borrowed_iterator_t<R> shuffle(R&& r, Gen&& g); // since C++20
template<forward_iterator I1, sentinel_for<I1> S1, forward_iterator I2,
sentinel_for<I2> S2, class Proj1 = identity, class Proj2 = identity,
indirect_equivalence_relation<projected<I1, Proj1>,
projected<I2, Proj2>> Pred = ranges::equal_to>
constexpr bool ranges::is_permutation(I1 first1, S1 last1, I2 first2, S2 last2,
Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<forward_range R1, forward_range R2,
class Proj1 = identity, class Proj2 = identity,
indirect_equivalence_relation<projected<iterator_t<R1>, Proj1>,
projected<iterator_t<R2>, Proj2>> Pred = ranges::equal_to>
constexpr bool ranges::is_permutation(R1&& r1, R2&& r2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<forward_iterator I1, sentinel_for<I1> S1, forward_iterator I2,
sentinel_for<I2> S2, class Pred = ranges::equal_to,
class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
constexpr subrange<I1>
ranges::search(I1 first1, S1 last1, I2 first2, S2 last2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<forward_range R1, forward_range R2, class Pred = ranges::equal_to,
class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
constexpr borrowed_subrange_t<R1>
ranges::search(R1&& r1, R2&& r2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<forward_iterator I, sentinel_for<I> S, class T,
class Pred = ranges::equal_to, class Proj = identity>
requires indirectly_comparable<I, const T*, Pred, Proj>
constexpr subrange<I>
ranges::search_n(I first, S last, iter_difference_t<I> count,
const T& value, Pred pred = {}, Proj proj = {}); // since C++20
template<forward_range R, class T, class Pred = ranges::equal_to,
class Proj = identity>
requires indirectly_comparable<iterator_t<R>, const T*, Pred, Proj>
constexpr borrowed_subrange_t<R>
ranges::search_n(R&& r, range_difference_t<R> count,
const T& value, Pred pred = {}, Proj proj = {}); // since C++20
template<forward_iterator I1, sentinel_for<I1> S1, forward_iterator I2, sentinel_for<I2> S2,
class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
constexpr subrange<I1>
ranges::find_end(I1 first1, S1 last1, I2 first2, S2 last2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<forward_range R1, forward_range R2,
class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
constexpr borrowed_subrange_t<R1>
ranges::find_end(R1&& r1, R2&& r2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<class I1, class I2, class O>
using set_symmetric_difference_result = in_in_out_result<I1, I2, O>; // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
weakly_incrementable O, class Comp = ranges::less,
class Proj1 = identity, class Proj2 = identity>
requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
constexpr set_symmetric_difference_result<I1, I2, O>
set_symmetric_difference(I1 first1, S1 last1, I2 first2, S2 last2, O result,
Comp comp = {}, Proj1 proj1 = {},
Proj2 proj2 = {}); // since C++20
template<input_range R1, input_range R2, weakly_incrementable O,
class Comp = ranges::less, class Proj1 = identity, class Proj2 = identity>
requires mergeable<iterator_t<R1>, iterator_t<R2>, O, Comp, Proj1, Proj2>
constexpr set_symmetric_difference_result<borrowed_iterator_t<R1>,
borrowed_iterator_t<R2>, O>
set_symmetric_difference(R1&& r1, R2&& r2, O result, Comp comp = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<forward_iterator I, sentinel_for<I> S, class T, class Proj = identity,
indirect_strict_weak_order<const T*, projected<I, Proj>> Comp = ranges::less>
constexpr subrange<I>
equal_range(I first, S last, const T& value, Comp comp = {}, Proj proj = {}); // since C++20
template<forward_range R, class T, class Proj = identity,
indirect_strict_weak_order<const T*, projected<iterator_t<R>, Proj>> Comp =
ranges::less>
constexpr borrowed_subrange_t<R>
equal_range(R&& r, const T& value, Comp comp = {}, Proj proj = {}); // since C++20
template<class I1, class I2, class O>
using set_union_result = in_in_out_result<I1, I2, O>; // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
weakly_incrementable O, class Comp = ranges::less,
class Proj1 = identity, class Proj2 = identity>
requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
constexpr set_union_result<I1, I2, O>
set_union(I1 first1, S1 last1, I2 first2, S2 last2, O result, Comp comp = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_range R1, input_range R2, weakly_incrementable O,
class Comp = ranges::less, class Proj1 = identity, class Proj2 = identity>
requires mergeable<iterator_t<R1>, iterator_t<R2>, O, Comp, Proj1, Proj2>
constexpr set_union_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>, O>
set_union(R1&& r1, R2&& r2, O result, Comp comp = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
class Proj1 = identity, class Proj2 = identity,
indirect_strict_weak_order<projected<I1, Proj1>, projected<I2, Proj2>> Comp =
ranges::less>
constexpr bool includes(I1 first1, S1 last1, I2 first2, S2 last2, Comp comp = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<input_range R1, input_range R2, class Proj1 = identity,
class Proj2 = identity,
indirect_strict_weak_order<projected<iterator_t<R1>, Proj1>,
projected<iterator_t<R2>, Proj2>> Comp = ranges::less>
constexpr bool includes(R1&& r1, R2&& r2, Comp comp = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
template<bidirectional_iterator I, sentinel_for<I> S, class Comp = ranges::less,
class Proj = identity>
requires sortable<I, Comp, Proj>
I inplace_merge(I first, I middle, S last, Comp comp = {}, Proj proj = {}); // since C++20
template<bidirectional_range R, class Comp = ranges::less, class Proj = identity>
requires sortable<iterator_t<R>, Comp, Proj>
borrowed_iterator_t<R>
inplace_merge(R&& r, iterator_t<R> middle, Comp comp = {},
Proj proj = {}); // since C++20
template<permutable I, sentinel_for<I> S, class Proj = identity,
indirect_equivalence_relation<projected<I, Proj>> C = ranges::equal_to>
constexpr subrange<I> unique(I first, S last, C comp = {}, Proj proj = {}); // since C++20
template<forward_range R, class Proj = identity,
indirect_equivalence_relation<projected<iterator_t<R>, Proj>> C = ranges::equal_to>
requires permutable<iterator_t<R>>
constexpr borrowed_subrange_t<R>
unique(R&& r, C comp = {}, Proj proj = {}); // since C++20
template<input_iterator I, sentinel_for<I> S, weakly_incrementable O, class Proj = identity,
indirect_equivalence_relation<projected<I, Proj>> C = ranges::equal_to>
requires indirectly_copyable<I, O> &&
(forward_iterator<I> ||
(input_iterator<O> && same_as<iter_value_t<I>, iter_value_t<O>>) ||
indirectly_copyable_storable<I, O>)
constexpr unique_copy_result<I, O>
unique_copy(I first, S last, O result, C comp = {}, Proj proj = {}); // since C++20
template<input_range R, weakly_incrementable O, class Proj = identity,
indirect_equivalence_relation<projected<iterator_t<R>, Proj>> C = ranges::equal_to>
requires indirectly_copyable<iterator_t<R>, O> &&
(forward_iterator<iterator_t<R>> ||
(input_iterator<O> && same_as<range_value_t<R>, iter_value_t<O>>) ||
indirectly_copyable_storable<iterator_t<R>, O>)
constexpr unique_copy_result<borrowed_iterator_t<R>, O>
unique_copy(R&& r, O result, C comp = {}, Proj proj = {}); // since C++20
template<class I, class O>
using remove_copy_result = in_out_result<I, O>; // since C++20
template<input_iterator I, sentinel_for<I> S, weakly_incrementable O, class T,
class Proj = identity>
indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T*>
constexpr remove_copy_result<I, O>
remove_copy(I first, S last, O result, const T& value, Proj proj = {}); // since C++20