161cfbce3SDimitry Andric //===----------------------------------------------------------------------===// 261cfbce3SDimitry Andric // 361cfbce3SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 461cfbce3SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 561cfbce3SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 661cfbce3SDimitry Andric // 761cfbce3SDimitry Andric //===----------------------------------------------------------------------===// 861cfbce3SDimitry Andric 961cfbce3SDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_SAMPLE_H 1061cfbce3SDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_SAMPLE_H 1161cfbce3SDimitry Andric 1261cfbce3SDimitry Andric #include <__algorithm/iterator_operations.h> 1361cfbce3SDimitry Andric #include <__algorithm/sample.h> 1461cfbce3SDimitry Andric #include <__algorithm/uniform_random_bit_generator_adaptor.h> 1561cfbce3SDimitry Andric #include <__config> 1661cfbce3SDimitry Andric #include <__iterator/concepts.h> 1761cfbce3SDimitry Andric #include <__iterator/incrementable_traits.h> 1861cfbce3SDimitry Andric #include <__iterator/iterator_traits.h> 1961cfbce3SDimitry Andric #include <__random/uniform_random_bit_generator.h> 2061cfbce3SDimitry Andric #include <__ranges/access.h> 2161cfbce3SDimitry Andric #include <__ranges/concepts.h> 2206c3fb27SDimitry Andric #include <__type_traits/remove_reference.h> 2361cfbce3SDimitry Andric #include <__utility/forward.h> 2461cfbce3SDimitry Andric #include <__utility/move.h> 2561cfbce3SDimitry Andric 2661cfbce3SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 2761cfbce3SDimitry Andric # pragma GCC system_header 2861cfbce3SDimitry Andric #endif 2961cfbce3SDimitry Andric 30*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 31*b3edf446SDimitry Andric #include <__undef_macros> 32*b3edf446SDimitry Andric 3306c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 3461cfbce3SDimitry Andric 3561cfbce3SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 3661cfbce3SDimitry Andric 3761cfbce3SDimitry Andric namespace ranges { 3861cfbce3SDimitry Andric namespace __sample { 3961cfbce3SDimitry Andric 4061cfbce3SDimitry Andric struct __fn { 4161cfbce3SDimitry Andric template <input_iterator _Iter, sentinel_for<_Iter> _Sent, weakly_incrementable _OutIter, class _Gen> 4206c3fb27SDimitry Andric requires(forward_iterator<_Iter> || random_access_iterator<_OutIter>) && indirectly_copyable<_Iter, _OutIter> && 4361cfbce3SDimitry Andric uniform_random_bit_generator<remove_reference_t<_Gen>> 4406c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI _OutIter 4506c3fb27SDimitry Andric operator()(_Iter __first, _Sent __last, _OutIter __out_first, iter_difference_t<_Iter> __n, _Gen&& __gen) const { 4661cfbce3SDimitry Andric _ClassicGenAdaptor<_Gen> __adapted_gen(__gen); 4761cfbce3SDimitry Andric return std::__sample<_RangeAlgPolicy>( 4861cfbce3SDimitry Andric std::move(__first), std::move(__last), std::move(__out_first), __n, __adapted_gen); 4961cfbce3SDimitry Andric } 5061cfbce3SDimitry Andric 5161cfbce3SDimitry Andric template <input_range _Range, weakly_incrementable _OutIter, class _Gen> 5261cfbce3SDimitry Andric requires(forward_range<_Range> || random_access_iterator<_OutIter>) && 5306c3fb27SDimitry Andric indirectly_copyable<iterator_t<_Range>, _OutIter> && uniform_random_bit_generator<remove_reference_t<_Gen>> 5406c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI _OutIter 5506c3fb27SDimitry Andric operator()(_Range&& __range, _OutIter __out_first, range_difference_t<_Range> __n, _Gen&& __gen) const { 5606c3fb27SDimitry Andric return (*this)( 5706c3fb27SDimitry Andric ranges::begin(__range), ranges::end(__range), std::move(__out_first), __n, std::forward<_Gen>(__gen)); 5861cfbce3SDimitry Andric } 5961cfbce3SDimitry Andric }; 6061cfbce3SDimitry Andric 6161cfbce3SDimitry Andric } // namespace __sample 6261cfbce3SDimitry Andric 6361cfbce3SDimitry Andric inline namespace __cpo { 6461cfbce3SDimitry Andric inline constexpr auto sample = __sample::__fn{}; 6561cfbce3SDimitry Andric } // namespace __cpo 6661cfbce3SDimitry Andric } // namespace ranges 6761cfbce3SDimitry Andric 6861cfbce3SDimitry Andric _LIBCPP_END_NAMESPACE_STD 6961cfbce3SDimitry Andric 7006c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 7161cfbce3SDimitry Andric 72*b3edf446SDimitry Andric _LIBCPP_POP_MACROS 73*b3edf446SDimitry Andric 7461cfbce3SDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_SAMPLE_H 75