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_FILL_N_H
10#define _LIBCPP___ALGORITHM_RANGES_FILL_N_H
11
12#include <__config>
13#include <__iterator/concepts.h>
14#include <__iterator/incrementable_traits.h>
15
16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17#  pragma GCC system_header
18#endif
19
20_LIBCPP_PUSH_MACROS
21#include <__undef_macros>
22
23#if _LIBCPP_STD_VER >= 20
24
25_LIBCPP_BEGIN_NAMESPACE_STD
26
27namespace ranges {
28namespace __fill_n {
29struct __fn {
30  template <class _Type, output_iterator<const _Type&> _Iter>
31  _LIBCPP_HIDE_FROM_ABI constexpr _Iter
32  operator()(_Iter __first, iter_difference_t<_Iter> __n, const _Type& __value) const {
33    for (; __n != 0; --__n) {
34      *__first = __value;
35      ++__first;
36    }
37    return __first;
38  }
39};
40} // namespace __fill_n
41
42inline namespace __cpo {
43inline constexpr auto fill_n = __fill_n::__fn{};
44} // namespace __cpo
45} // namespace ranges
46
47_LIBCPP_END_NAMESPACE_STD
48
49#endif // _LIBCPP_STD_VER >= 20
50
51_LIBCPP_POP_MACROS
52
53#endif // _LIBCPP___ALGORITHM_RANGES_FILL_N_H
54