v1/__algorithm/generate_n.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___ALGORITHM_GENERATE_N_H
0010 #define _LIBCPP___ALGORITHM_GENERATE_N_H
0011
0012 #include <__config>
0013 #include <__utility/convert_to_integral.h>
0014
0015 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0016 #  pragma GCC system_header
0017 #endif
0018
0019 _LIBCPP_BEGIN_NAMESPACE_STD
0020
0021 template <class _OutputIterator, class _Size, class _Generator>
0022 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
0023 generate_n(_OutputIterator __first, _Size __orig_n, _Generator __gen) {
0024   typedef decltype(std::__convert_to_integral(__orig_n)) _IntegralSize;
0025   _IntegralSize __n = __orig_n;
0026   for (; __n > 0; ++__first, (void)--__n)
0027     *__first = __gen();
0028   return __first;
0029 }
0030
0031 _LIBCPP_END_NAMESPACE_STD
0032
0033 #endif // _LIBCPP___ALGORITHM_GENERATE_N_H