xref: /freebsd-src/contrib/llvm-project/libcxx/include/__algorithm/ranges_fill_n.h (revision b3edf4467982447620505a28fc82e38a414c07dc)
181ad6265SDimitry Andric //===----------------------------------------------------------------------===//
281ad6265SDimitry Andric //
381ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
481ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
581ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
681ad6265SDimitry Andric //
781ad6265SDimitry Andric //===----------------------------------------------------------------------===//
881ad6265SDimitry Andric 
981ad6265SDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_FILL_N_H
1081ad6265SDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_FILL_N_H
1181ad6265SDimitry Andric 
1281ad6265SDimitry Andric #include <__config>
1381ad6265SDimitry Andric #include <__iterator/concepts.h>
1481ad6265SDimitry Andric #include <__iterator/incrementable_traits.h>
1581ad6265SDimitry Andric 
1681ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
1781ad6265SDimitry Andric #  pragma GCC system_header
1881ad6265SDimitry Andric #endif
1981ad6265SDimitry Andric 
20*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS
21*b3edf446SDimitry Andric #include <__undef_macros>
22*b3edf446SDimitry Andric 
2306c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20
2481ad6265SDimitry Andric 
2581ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
2681ad6265SDimitry Andric 
2781ad6265SDimitry Andric namespace ranges {
2881ad6265SDimitry Andric namespace __fill_n {
2981ad6265SDimitry Andric struct __fn {
3081ad6265SDimitry Andric   template <class _Type, output_iterator<const _Type&> _Iter>
3106c3fb27SDimitry Andric   _LIBCPP_HIDE_FROM_ABI constexpr _Iter
operator__fn3206c3fb27SDimitry Andric   operator()(_Iter __first, iter_difference_t<_Iter> __n, const _Type& __value) const {
3381ad6265SDimitry Andric     for (; __n != 0; --__n) {
3481ad6265SDimitry Andric       *__first = __value;
3581ad6265SDimitry Andric       ++__first;
3681ad6265SDimitry Andric     }
3781ad6265SDimitry Andric     return __first;
3881ad6265SDimitry Andric   }
3981ad6265SDimitry Andric };
4081ad6265SDimitry Andric } // namespace __fill_n
4181ad6265SDimitry Andric 
4281ad6265SDimitry Andric inline namespace __cpo {
4381ad6265SDimitry Andric inline constexpr auto fill_n = __fill_n::__fn{};
4481ad6265SDimitry Andric } // namespace __cpo
4581ad6265SDimitry Andric } // namespace ranges
4681ad6265SDimitry Andric 
4781ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD
4881ad6265SDimitry Andric 
4906c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20
5081ad6265SDimitry Andric 
51*b3edf446SDimitry Andric _LIBCPP_POP_MACROS
52*b3edf446SDimitry Andric 
5381ad6265SDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_FILL_N_H
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