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 #if _LIBCPP_STD_VER >= 20
21 
22 _LIBCPP_BEGIN_NAMESPACE_STD
23 
24 namespace ranges {
25 namespace __fill_n {
26 struct __fn {
27   template <class _Type, output_iterator<const _Type&> _Iter>
28   _LIBCPP_HIDE_FROM_ABI constexpr _Iter
29   operator()(_Iter __first, iter_difference_t<_Iter> __n, const _Type& __value) const {
30     for (; __n != 0; --__n) {
31       *__first = __value;
32       ++__first;
33     }
34     return __first;
35   }
36 };
37 } // namespace __fill_n
38 
39 inline namespace __cpo {
40 inline constexpr auto fill_n = __fill_n::__fn{};
41 } // namespace __cpo
42 } // namespace ranges
43 
44 _LIBCPP_END_NAMESPACE_STD
45 
46 #endif // _LIBCPP_STD_VER >= 20
47 
48 #endif // _LIBCPP___ALGORITHM_RANGES_FILL_N_H
49