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_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
26 void
27 __fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, forward_iterator_tag)
28 {
29     for (; __first != __last; ++__first)
30         *__first = __value;
31 }
32 
33 template <class _RandomAccessIterator, class _Tp>
34 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
35 void
36 __fill(_RandomAccessIterator __first, _RandomAccessIterator __last, const _Tp& __value, random_access_iterator_tag)
37 {
38     _VSTD::fill_n(__first, __last - __first, __value);
39 }
40 
41 template <class _ForwardIterator, class _Tp>
42 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
43 void
44 fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value)
45 {
46     _VSTD::__fill(__first, __last, __value, typename iterator_traits<_ForwardIterator>::iterator_category());
47 }
48 
49 _LIBCPP_END_NAMESPACE_STD
50 
51 #endif // _LIBCPP___ALGORITHM_FILL_H
52