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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___ALGORITHM_FILL_H
#define _LIBCPP___ALGORITHM_FILL_H
#include <__algorithm/fill_n.h>
#include <__algorithm/for_each_segment.h>
#include <__config>
#include <__iterator/iterator_traits.h>
#include <__iterator/segmented_iterator.h>
#include <__type_traits/enable_if.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
// fill isn't specialized for std::memset, because the compiler already optimizes the loop to a call to std::memset.
template <class _ForwardIterator, class _Sentinel, class _Tp>
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
__fill(_ForwardIterator __first, _Sentinel __last, const _Tp& __value) {
for (; __first != __last; ++__first)
*__first = __value;
return __first;
}
template <class _RandomAccessIterator,
class _Tp,
__enable_if_t<__has_random_access_iterator_category<_RandomAccessIterator>::value &&
!__is_segmented_iterator_v<_RandomAccessIterator>,
int> = 0>
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _RandomAccessIterator
__fill(_RandomAccessIterator __first, _RandomAccessIterator __last, const _Tp& __value) {
return std::__fill_n(__first, __last - __first, __value);
}
#ifndef _LIBCPP_CXX03_LANG
template <class _SegmentedIterator, class _Tp, __enable_if_t<__is_segmented_iterator_v<_SegmentedIterator>, int> = 0>
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
_SegmentedIterator __fill(_SegmentedIterator __first, _SegmentedIterator __last, const _Tp& __value) {
using __local_iterator_t = typename __segmented_iterator_traits<_SegmentedIterator>::__local_iterator;
std::__for_each_segment(__first, __last, [&](__local_iterator_t __lfirst, __local_iterator_t __llast) {
std::__fill(__lfirst, __llast, __value);
});
return __last;
}
#endif // !_LIBCPP_CXX03_LANG
template <class _ForwardIterator, class _Tp>
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void
fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
std::__fill(__first, __last, __value);
}
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___ALGORITHM_FILL_H
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