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156ab87500
See: * https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319 * https://discourse.llvm.org/t/rfc-project-hand-in-hand-llvm-libc-libc-code-sharing/77701 We're dropping support for C++03 for Zig due to the first change; it would be insane to ship 1018 duplicate header files just for this outdated use case. As a result of the second change, I had to bring in a subset of the headers from llvm-libc since libc++ now depends on these. Hopefully we can continue to get away with not copying the entirety of llvm-libc.
70 lines
2.5 KiB
C++
Vendored
70 lines
2.5 KiB
C++
Vendored
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_RANGES_SAMPLE_H
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#define _LIBCPP___ALGORITHM_RANGES_SAMPLE_H
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#include <__algorithm/iterator_operations.h>
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#include <__algorithm/sample.h>
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#include <__algorithm/uniform_random_bit_generator_adaptor.h>
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#include <__config>
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#include <__iterator/concepts.h>
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#include <__iterator/incrementable_traits.h>
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#include <__iterator/iterator_traits.h>
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#include <__random/uniform_random_bit_generator.h>
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#include <__ranges/access.h>
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#include <__ranges/concepts.h>
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#include <__type_traits/remove_reference.h>
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#include <__utility/forward.h>
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#include <__utility/move.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_PUSH_MACROS
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#include <__undef_macros>
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#if _LIBCPP_STD_VER >= 20
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace ranges {
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struct __sample {
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template <input_iterator _Iter, sentinel_for<_Iter> _Sent, weakly_incrementable _OutIter, class _Gen>
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requires(forward_iterator<_Iter> || random_access_iterator<_OutIter>) && indirectly_copyable<_Iter, _OutIter> &&
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uniform_random_bit_generator<remove_reference_t<_Gen>>
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_LIBCPP_HIDE_FROM_ABI _OutIter
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operator()(_Iter __first, _Sent __last, _OutIter __out_first, iter_difference_t<_Iter> __n, _Gen&& __gen) const {
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_ClassicGenAdaptor<_Gen> __adapted_gen(__gen);
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return std::__sample<_RangeAlgPolicy>(
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std::move(__first), std::move(__last), std::move(__out_first), __n, __adapted_gen);
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}
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template <input_range _Range, weakly_incrementable _OutIter, class _Gen>
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requires(forward_range<_Range> || random_access_iterator<_OutIter>) &&
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indirectly_copyable<iterator_t<_Range>, _OutIter> && uniform_random_bit_generator<remove_reference_t<_Gen>>
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_LIBCPP_HIDE_FROM_ABI _OutIter
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operator()(_Range&& __range, _OutIter __out_first, range_difference_t<_Range> __n, _Gen&& __gen) const {
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return (*this)(
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ranges::begin(__range), ranges::end(__range), std::move(__out_first), __n, std::forward<_Gen>(__gen));
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}
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};
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inline namespace __cpo {
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inline constexpr auto sample = __sample{};
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} // namespace __cpo
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} // namespace ranges
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_RANGES_SAMPLE_H
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