1*4bdff4beSrobert //===----------------------------------------------------------------------===// 2*4bdff4beSrobert // 3*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 5*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*4bdff4beSrobert // 7*4bdff4beSrobert //===----------------------------------------------------------------------===// 8*4bdff4beSrobert 9*4bdff4beSrobert #ifndef _LIBCPP___ALGORITHM_RANGES_GENERATE_N_H 10*4bdff4beSrobert #define _LIBCPP___ALGORITHM_RANGES_GENERATE_N_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__concepts/constructible.h> 13*4bdff4beSrobert #include <__concepts/invocable.h> 14*4bdff4beSrobert #include <__config> 15*4bdff4beSrobert #include <__functional/identity.h> 16*4bdff4beSrobert #include <__functional/invoke.h> 17*4bdff4beSrobert #include <__iterator/concepts.h> 18*4bdff4beSrobert #include <__iterator/incrementable_traits.h> 19*4bdff4beSrobert #include <__iterator/iterator_traits.h> 20*4bdff4beSrobert #include <__ranges/access.h> 21*4bdff4beSrobert #include <__ranges/concepts.h> 22*4bdff4beSrobert #include <__utility/move.h> 23*4bdff4beSrobert 24*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 25*4bdff4beSrobert # pragma GCC system_header 26*4bdff4beSrobert #endif 27*4bdff4beSrobert 28*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 29*4bdff4beSrobert 30*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 31*4bdff4beSrobert 32*4bdff4beSrobert namespace ranges { 33*4bdff4beSrobert namespace __generate_n { 34*4bdff4beSrobert 35*4bdff4beSrobert struct __fn { 36*4bdff4beSrobert 37*4bdff4beSrobert template <input_or_output_iterator _OutIter, copy_constructible _Func> 38*4bdff4beSrobert requires invocable<_Func&> && indirectly_writable<_OutIter, invoke_result_t<_Func&>> 39*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr operator__fn40*4bdff4beSrobert _OutIter operator()(_OutIter __first, iter_difference_t<_OutIter> __n, _Func __gen) const { 41*4bdff4beSrobert for (; __n > 0; --__n) { 42*4bdff4beSrobert *__first = __gen(); 43*4bdff4beSrobert ++__first; 44*4bdff4beSrobert } 45*4bdff4beSrobert 46*4bdff4beSrobert return __first; 47*4bdff4beSrobert } 48*4bdff4beSrobert 49*4bdff4beSrobert }; 50*4bdff4beSrobert 51*4bdff4beSrobert } // namespace __generate_n 52*4bdff4beSrobert 53*4bdff4beSrobert inline namespace __cpo { 54*4bdff4beSrobert inline constexpr auto generate_n = __generate_n::__fn{}; 55*4bdff4beSrobert } // namespace __cpo 56*4bdff4beSrobert } // namespace ranges 57*4bdff4beSrobert 58*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 59*4bdff4beSrobert 60*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 61*4bdff4beSrobert 62*4bdff4beSrobert #endif // _LIBCPP___ALGORITHM_RANGES_GENERATE_N_H 63