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_H
10 #define _LIBCPP___ALGORITHM_FILL_H
11
12 #include <__algorithm/fill_n.h>
13 #include <__config>
14 #include <__iterator/iterator_traits.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 isn't specialized for std::memset, because the compiler already optimizes the loop to a call to std::memset.
23
24 template <class _ForwardIterator, class _Tp>
25 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
__fill(_ForwardIterator __first,_ForwardIterator __last,const _Tp & __value,forward_iterator_tag)26 __fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, forward_iterator_tag) {
27 for (; __first != __last; ++__first)
28 *__first = __value;
29 }
30
31 template <class _RandomAccessIterator, class _Tp>
32 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
__fill(_RandomAccessIterator __first,_RandomAccessIterator __last,const _Tp & __value,random_access_iterator_tag)33 __fill(_RandomAccessIterator __first, _RandomAccessIterator __last, const _Tp& __value, random_access_iterator_tag) {
34 std::fill_n(__first, __last - __first, __value);
35 }
36
37 template <class _ForwardIterator, class _Tp>
38 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
fill(_ForwardIterator __first,_ForwardIterator __last,const _Tp & __value)39 fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
40 std::__fill(__first, __last, __value, typename iterator_traits<_ForwardIterator>::iterator_category());
41 }
42
43 _LIBCPP_END_NAMESPACE_STD
44
45 #endif // _LIBCPP___ALGORITHM_FILL_H
46