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_SAMPLE_H 10*4bdff4beSrobert #define _LIBCPP___ALGORITHM_RANGES_SAMPLE_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__algorithm/iterator_operations.h> 13*4bdff4beSrobert #include <__algorithm/sample.h> 14*4bdff4beSrobert #include <__algorithm/uniform_random_bit_generator_adaptor.h> 15*4bdff4beSrobert #include <__config> 16*4bdff4beSrobert #include <__iterator/concepts.h> 17*4bdff4beSrobert #include <__iterator/incrementable_traits.h> 18*4bdff4beSrobert #include <__iterator/iterator_traits.h> 19*4bdff4beSrobert #include <__random/uniform_random_bit_generator.h> 20*4bdff4beSrobert #include <__ranges/access.h> 21*4bdff4beSrobert #include <__ranges/concepts.h> 22*4bdff4beSrobert #include <__utility/forward.h> 23*4bdff4beSrobert #include <__utility/move.h> 24*4bdff4beSrobert #include <type_traits> 25*4bdff4beSrobert 26*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 27*4bdff4beSrobert # pragma GCC system_header 28*4bdff4beSrobert #endif 29*4bdff4beSrobert 30*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 31*4bdff4beSrobert 32*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 33*4bdff4beSrobert 34*4bdff4beSrobert namespace ranges { 35*4bdff4beSrobert namespace __sample { 36*4bdff4beSrobert 37*4bdff4beSrobert struct __fn { 38*4bdff4beSrobert 39*4bdff4beSrobert template <input_iterator _Iter, sentinel_for<_Iter> _Sent, weakly_incrementable _OutIter, class _Gen> 40*4bdff4beSrobert requires (forward_iterator<_Iter> || random_access_iterator<_OutIter>) && 41*4bdff4beSrobert indirectly_copyable<_Iter, _OutIter> && 42*4bdff4beSrobert uniform_random_bit_generator<remove_reference_t<_Gen>> 43*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI operator__fn44*4bdff4beSrobert _OutIter operator()(_Iter __first, _Sent __last, 45*4bdff4beSrobert _OutIter __out_first, iter_difference_t<_Iter> __n, _Gen&& __gen) const { 46*4bdff4beSrobert _ClassicGenAdaptor<_Gen> __adapted_gen(__gen); 47*4bdff4beSrobert return std::__sample<_RangeAlgPolicy>( 48*4bdff4beSrobert std::move(__first), std::move(__last), std::move(__out_first), __n, __adapted_gen); 49*4bdff4beSrobert } 50*4bdff4beSrobert 51*4bdff4beSrobert template <input_range _Range, weakly_incrementable _OutIter, class _Gen> 52*4bdff4beSrobert requires (forward_range<_Range> || random_access_iterator<_OutIter>) && 53*4bdff4beSrobert indirectly_copyable<iterator_t<_Range>, _OutIter> && 54*4bdff4beSrobert uniform_random_bit_generator<remove_reference_t<_Gen>> 55*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI operator__fn56*4bdff4beSrobert _OutIter operator()(_Range&& __range, _OutIter __out_first, range_difference_t<_Range> __n, _Gen&& __gen) const { 57*4bdff4beSrobert return (*this)(ranges::begin(__range), ranges::end(__range), 58*4bdff4beSrobert std::move(__out_first), __n, std::forward<_Gen>(__gen)); 59*4bdff4beSrobert } 60*4bdff4beSrobert 61*4bdff4beSrobert }; 62*4bdff4beSrobert 63*4bdff4beSrobert } // namespace __sample 64*4bdff4beSrobert 65*4bdff4beSrobert inline namespace __cpo { 66*4bdff4beSrobert inline constexpr auto sample = __sample::__fn{}; 67*4bdff4beSrobert } // namespace __cpo 68*4bdff4beSrobert } // namespace ranges 69*4bdff4beSrobert 70*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 71*4bdff4beSrobert 72*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 73*4bdff4beSrobert 74*4bdff4beSrobert #endif // _LIBCPP___ALGORITHM_RANGES_SAMPLE_H 75