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 #include <type_traits> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 // fill_n isn't specialized for std::memset, because the compiler already optimizes the loop to a call to std::memset. 24 25 template <class _OutputIterator, class _Size, class _Tp> 26 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 27 _OutputIterator 28 __fill_n(_OutputIterator __first, _Size __n, const _Tp& __value) 29 { 30 for (; __n > 0; ++__first, (void) --__n) 31 *__first = __value; 32 return __first; 33 } 34 35 template <class _OutputIterator, class _Size, class _Tp> 36 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 37 _OutputIterator 38 fill_n(_OutputIterator __first, _Size __n, const _Tp& __value) 39 { 40 return _VSTD::__fill_n(__first, _VSTD::__convert_to_integral(__n), __value); 41 } 42 43 _LIBCPP_END_NAMESPACE_STD 44 45 #endif // _LIBCPP___ALGORITHM_FILL_N_H 46