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_H 10*4bdff4beSrobert #define _LIBCPP___ALGORITHM_RANGES_GENERATE_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__concepts/constructible.h> 13*4bdff4beSrobert #include <__concepts/invocable.h> 14*4bdff4beSrobert #include <__config> 15*4bdff4beSrobert #include <__functional/invoke.h> 16*4bdff4beSrobert #include <__iterator/concepts.h> 17*4bdff4beSrobert #include <__iterator/iterator_traits.h> 18*4bdff4beSrobert #include <__ranges/access.h> 19*4bdff4beSrobert #include <__ranges/concepts.h> 20*4bdff4beSrobert #include <__ranges/dangling.h> 21*4bdff4beSrobert #include <__utility/move.h> 22*4bdff4beSrobert 23*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 24*4bdff4beSrobert # pragma GCC system_header 25*4bdff4beSrobert #endif 26*4bdff4beSrobert 27*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 28*4bdff4beSrobert 29*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 30*4bdff4beSrobert 31*4bdff4beSrobert namespace ranges { 32*4bdff4beSrobert namespace __generate { 33*4bdff4beSrobert 34*4bdff4beSrobert struct __fn { 35*4bdff4beSrobert 36*4bdff4beSrobert template <class _OutIter, class _Sent, class _Func> 37*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr __generate_fn_impl__fn38*4bdff4beSrobert static _OutIter __generate_fn_impl(_OutIter __first, _Sent __last, _Func& __gen) { 39*4bdff4beSrobert for (; __first != __last; ++__first) { 40*4bdff4beSrobert *__first = __gen(); 41*4bdff4beSrobert } 42*4bdff4beSrobert 43*4bdff4beSrobert return __first; 44*4bdff4beSrobert } 45*4bdff4beSrobert 46*4bdff4beSrobert template <input_or_output_iterator _OutIter, sentinel_for<_OutIter> _Sent, copy_constructible _Func> 47*4bdff4beSrobert requires invocable<_Func&> && indirectly_writable<_OutIter, invoke_result_t<_Func&>> 48*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr operator__fn49*4bdff4beSrobert _OutIter operator()(_OutIter __first, _Sent __last, _Func __gen) const { 50*4bdff4beSrobert return __generate_fn_impl(std::move(__first), std::move(__last), __gen); 51*4bdff4beSrobert } 52*4bdff4beSrobert 53*4bdff4beSrobert template <class _Range, copy_constructible _Func> 54*4bdff4beSrobert requires invocable<_Func&> && output_range<_Range, invoke_result_t<_Func&>> 55*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr operator__fn56*4bdff4beSrobert borrowed_iterator_t<_Range> operator()(_Range&& __range, _Func __gen) const { 57*4bdff4beSrobert return __generate_fn_impl(ranges::begin(__range), ranges::end(__range), __gen); 58*4bdff4beSrobert } 59*4bdff4beSrobert 60*4bdff4beSrobert }; 61*4bdff4beSrobert 62*4bdff4beSrobert } // namespace __generate 63*4bdff4beSrobert 64*4bdff4beSrobert inline namespace __cpo { 65*4bdff4beSrobert inline constexpr auto generate = __generate::__fn{}; 66*4bdff4beSrobert } // namespace __cpo 67*4bdff4beSrobert } // namespace ranges 68*4bdff4beSrobert 69*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 70*4bdff4beSrobert 71*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 72*4bdff4beSrobert 73*4bdff4beSrobert #endif // _LIBCPP___ALGORITHM_RANGES_GENERATE_H 74