1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef _LIBCPP___ALGORITHM_RANGES_GENERATE_N_H
10#define _LIBCPP___ALGORITHM_RANGES_GENERATE_N_H
11
12#include <__algorithm/generate_n.h>
13#include <__concepts/constructible.h>
14#include <__concepts/invocable.h>
15#include <__config>
16#include <__functional/identity.h>
17#include <__iterator/concepts.h>
18#include <__iterator/incrementable_traits.h>
19#include <__iterator/iterator_traits.h>
20#include <__ranges/access.h>
21#include <__ranges/concepts.h>
22#include <__type_traits/invoke.h>
23#include <__utility/move.h>
24
25#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
26# pragma GCC system_header
27#endif
28
29_LIBCPP_PUSH_MACROS
30#include <__undef_macros>
31
32#if _LIBCPP_STD_VER >= 20
33
34_LIBCPP_BEGIN_NAMESPACE_STD
35
36namespace ranges {
37struct __generate_n {
38 template <input_or_output_iterator _OutIter, copy_constructible _Func>
39 requires invocable<_Func&> && indirectly_writable<_OutIter, invoke_result_t<_Func&>>
40 _LIBCPP_HIDE_FROM_ABI constexpr _OutIter
41 operator()(_OutIter __first, iter_difference_t<_OutIter> __n, _Func __gen) const {
42 return std::__generate_n(std::move(__first), __n, __gen);
43 }
44};
45
46inline namespace __cpo {
47inline constexpr auto generate_n = __generate_n{};
48} // namespace __cpo
49} // namespace ranges
50
51_LIBCPP_END_NAMESPACE_STD
52
53#endif // _LIBCPP_STD_VER >= 20
54
55_LIBCPP_POP_MACROS
56
57#endif // _LIBCPP___ALGORITHM_RANGES_GENERATE_N_H
58