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_FILL_N_H 10 #define _LIBCPP___ALGORITHM_FILL_N_H 11 12 #include <__config> 13 #include <__iterator/iterator_traits.h> 14 #include <__utility/convert_to_integral.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 # pragma GCC system_header 18 #endif 19 20 _LIBCPP_BEGIN_NAMESPACE_STD 21 22 // fill_n isn't specialized for std::memset, because the compiler already optimizes the loop to a call to std::memset. 23 24 template <class _OutputIterator, class _Size, class _Tp> 25 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator 26 __fill_n(_OutputIterator __first, _Size __n, const _Tp& __value) { 27 for (; __n > 0; ++__first, (void)--__n) 28 *__first = __value; 29 return __first; 30 } 31 32 template <class _OutputIterator, class _Size, class _Tp> 33 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator 34 fill_n(_OutputIterator __first, _Size __n, const _Tp& __value) { 35 return std::__fill_n(__first, std::__convert_to_integral(__n), __value); 36 } 37 38 _LIBCPP_END_NAMESPACE_STD 39 40 #endif // _LIBCPP___ALGORITHM_FILL_N_H 41