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 30 namespace ranges { 31 struct __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 49 inline namespace __cpo { 50 inline 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