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 #include <type_traits>
16 
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18 #  pragma GCC system_header
19 #endif
20 
21 _LIBCPP_BEGIN_NAMESPACE_STD
22 
23 // fill_n isn't specialized for std::memset, because the compiler already optimizes the loop to a call to std::memset.
24 
25 template <class _OutputIterator, class _Size, class _Tp>
26 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
27 _OutputIterator
28 __fill_n(_OutputIterator __first, _Size __n, const _Tp& __value)
29 {
30     for (; __n > 0; ++__first, (void) --__n)
31         *__first = __value;
32     return __first;
33 }
34 
35 template <class _OutputIterator, class _Size, class _Tp>
36 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
37 _OutputIterator
38 fill_n(_OutputIterator __first, _Size __n, const _Tp& __value)
39 {
40    return _VSTD::__fill_n(__first, _VSTD::__convert_to_integral(__n), __value);
41 }
42 
43 _LIBCPP_END_NAMESPACE_STD
44 
45 #endif // _LIBCPP___ALGORITHM_FILL_N_H
46