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_FILL_N_H
10#define _LIBCPP___ALGORITHM_FILL_N_H
11
12#include <__config>
13#include <__iterator/iterator_traits.h>
14#include <__utility/convert_to_integral.h>
15
16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17#  pragma GCC system_header
18#endif
19
20_LIBCPP_BEGIN_NAMESPACE_STD
21
22// fill_n isn't specialized for std::memset, because the compiler already optimizes the loop to a call to std::memset.
23
24template <class _OutputIterator, class _Size, class _Tp>
25inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
26__fill_n(_OutputIterator __first, _Size __n, const _Tp& __value) {
27  for (; __n > 0; ++__first, (void)--__n)
28    *__first = __value;
29  return __first;
30}
31
32template <class _OutputIterator, class _Size, class _Tp>
33inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
34fill_n(_OutputIterator __first, _Size __n, const _Tp& __value) {
35  return std::__fill_n(__first, std::__convert_to_integral(__n), __value);
36}
37
38_LIBCPP_END_NAMESPACE_STD
39
40#endif // _LIBCPP___ALGORITHM_FILL_N_H
41