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1 //===----------------------------------------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef _LIBCPP___ALGORITHM_RANGES_FILL_H
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10 #define _LIBCPP___ALGORITHM_RANGES_FILL_H
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11
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12 #include <__algorithm/ranges_fill_n.h>
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13 #include <__config>
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14 #include <__iterator/concepts.h>
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15 #include <__ranges/access.h>
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16 #include <__ranges/concepts.h>
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17 #include <__ranges/dangling.h>
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18
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19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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20 # pragma GCC system_header
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21 #endif
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22
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23 #if _LIBCPP_STD_VER > 17
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24
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25 _LIBCPP_BEGIN_NAMESPACE_STD
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26
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27 namespace ranges {
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28 namespace __fill {
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29 struct __fn {
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30 template <class _Type, output_iterator<const _Type&> _Iter, sentinel_for<_Iter> _Sent>
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31 _LIBCPP_HIDE_FROM_ABI constexpr
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32 _Iter operator()(_Iter __first, _Sent __last, const _Type& __value) const {
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33 if constexpr(random_access_iterator<_Iter> && sized_sentinel_for<_Sent, _Iter>) {
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34 return ranges::fill_n(__first, __last - __first, __value);
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35 } else {
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36 for (; __first != __last; ++__first)
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37 *__first = __value;
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38 return __first;
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39 }
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40 }
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41
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42 template <class _Type, output_range<const _Type&> _Range>
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43 _LIBCPP_HIDE_FROM_ABI constexpr
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44 borrowed_iterator_t<_Range> operator()(_Range&& __range, const _Type& __value) const {
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45 return (*this)(ranges::begin(__range), ranges::end(__range), __value);
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46 }
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47 };
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48 } // namespace __fill
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49
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50 inline namespace __cpo {
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51 inline constexpr auto fill = __fill::__fn{};
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52 } // namespace __cpo
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53 } // namespace ranges
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54
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55 _LIBCPP_END_NAMESPACE_STD
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56
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57 #endif // _LIBCPP_STD_VER > 17
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58
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59 #endif // _LIBCPP___ALGORITHM_RANGES_FILL_H
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