| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___ALGORITHM_RANGES_SAMPLE_H |
| #define _LIBCPP___ALGORITHM_RANGES_SAMPLE_H |
| |
| #include <__algorithm/iterator_operations.h> |
| #include <__algorithm/sample.h> |
| #include <__algorithm/uniform_random_bit_generator_adaptor.h> |
| #include <__config> |
| #include <__iterator/concepts.h> |
| #include <__iterator/incrementable_traits.h> |
| #include <__iterator/iterator_traits.h> |
| #include <__random/uniform_random_bit_generator.h> |
| #include <__ranges/access.h> |
| #include <__ranges/concepts.h> |
| #include <__utility/forward.h> |
| #include <__utility/move.h> |
| #include <type_traits> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if _LIBCPP_STD_VER > 17 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| namespace ranges { |
| namespace __sample { |
| |
| struct __fn { |
| |
| template <input_iterator _Iter, sentinel_for<_Iter> _Sent, weakly_incrementable _OutIter, class _Gen> |
| requires (forward_iterator<_Iter> || random_access_iterator<_OutIter>) && |
| indirectly_copyable<_Iter, _OutIter> && |
| uniform_random_bit_generator<remove_reference_t<_Gen>> |
| _LIBCPP_HIDE_FROM_ABI |
| _OutIter operator()(_Iter __first, _Sent __last, |
| _OutIter __out_first, iter_difference_t<_Iter> __n, _Gen&& __gen) const { |
| _ClassicGenAdaptor<_Gen> __adapted_gen(__gen); |
| return std::__sample<_RangeAlgPolicy>( |
| std::move(__first), std::move(__last), std::move(__out_first), __n, __adapted_gen); |
| } |
| |
| template <input_range _Range, weakly_incrementable _OutIter, class _Gen> |
| requires (forward_range<_Range> || random_access_iterator<_OutIter>) && |
| indirectly_copyable<iterator_t<_Range>, _OutIter> && |
| uniform_random_bit_generator<remove_reference_t<_Gen>> |
| _LIBCPP_HIDE_FROM_ABI |
| _OutIter operator()(_Range&& __range, _OutIter __out_first, range_difference_t<_Range> __n, _Gen&& __gen) const { |
| return (*this)(ranges::begin(__range), ranges::end(__range), |
| std::move(__out_first), __n, std::forward<_Gen>(__gen)); |
| } |
| |
| }; |
| |
| } // namespace __sample |
| |
| inline namespace __cpo { |
| inline constexpr auto sample = __sample::__fn{}; |
| } // namespace __cpo |
| } // namespace ranges |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_STD_VER > 17 |
| |
| #endif // _LIBCPP___ALGORITHM_RANGES_SAMPLE_H |