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_H
10#define _LIBCPP___ALGORITHM_RANGES_FILL_H
11
12#include <__algorithm/ranges_fill_n.h>
13#include <__config>
14#include <__iterator/concepts.h>
15#include <__ranges/access.h>
16#include <__ranges/concepts.h>
17#include <__ranges/dangling.h>
18
19#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
20# pragma GCC system_header
21#endif
22
23_LIBCPP_PUSH_MACROS
24#include <__undef_macros>
25
26#if _LIBCPP_STD_VER >= 20
27
28_LIBCPP_BEGIN_NAMESPACE_STD
29
30namespace ranges {
31struct __fill {
32 template <class _Type, output_iterator<const _Type&> _Iter, sentinel_for<_Iter> _Sent>
33 _LIBCPP_HIDE_FROM_ABI constexpr _Iter operator()(_Iter __first, _Sent __last, const _Type& __value) const {
34 if constexpr (random_access_iterator<_Iter> && sized_sentinel_for<_Sent, _Iter>) {
35 return ranges::fill_n(__first, __last - __first, __value);
36 } else {
37 for (; __first != __last; ++__first)
38 *__first = __value;
39 return __first;
40 }
41 }
42
43 template <class _Type, output_range<const _Type&> _Range>
44 _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range> operator()(_Range&& __range, const _Type& __value) const {
45 return (*this)(ranges::begin(__range), ranges::end(__range), __value);
46 }
47};
48
49inline namespace __cpo {
50inline constexpr auto fill = __fill{};
51} // namespace __cpo
52} // namespace ranges
53
54_LIBCPP_END_NAMESPACE_STD
55
56#endif // _LIBCPP_STD_VER >= 20
57
58_LIBCPP_POP_MACROS
59
60#endif // _LIBCPP___ALGORITHM_RANGES_FILL_H
61