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 
24 template <class _OutputIterator, class _Size, class _Tp>
25 inline _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 
32 template <class _OutputIterator, class _Size, class _Tp>
33 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
34 fill_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