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_N_H 10 #define _LIBCPP___ALGORITHM_RANGES_FILL_N_H 11 12 #include <__config> 13 #include <__iterator/concepts.h> 14 #include <__iterator/incrementable_traits.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 # pragma GCC system_header 18 #endif 19 20 _LIBCPP_PUSH_MACROS 21 #include <__undef_macros> 22 23 #if _LIBCPP_STD_VER >= 20 24 25 _LIBCPP_BEGIN_NAMESPACE_STD 26 27 namespace ranges { 28 namespace __fill_n { 29 struct __fn { 30 template <class _Type, output_iterator<const _Type&> _Iter> 31 _LIBCPP_HIDE_FROM_ABI constexpr _Iter 32 operator()(_Iter __first, iter_difference_t<_Iter> __n, const _Type& __value) const { 33 for (; __n != 0; --__n) { 34 *__first = __value; 35 ++__first; 36 } 37 return __first; 38 } 39 }; 40 } // namespace __fill_n 41 42 inline namespace __cpo { 43 inline constexpr auto fill_n = __fill_n::__fn{}; 44 } // namespace __cpo 45 } // namespace ranges 46 47 _LIBCPP_END_NAMESPACE_STD 48 49 #endif // _LIBCPP_STD_VER >= 20 50 51 _LIBCPP_POP_MACROS 52 53 #endif // _LIBCPP___ALGORITHM_RANGES_FILL_N_H 54