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Diffstat (limited to 'contrib/llvm-project/libcxx/include/__algorithm/ranges_partial_sort.h')
-rw-r--r-- | contrib/llvm-project/libcxx/include/__algorithm/ranges_partial_sort.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__algorithm/ranges_partial_sort.h b/contrib/llvm-project/libcxx/include/__algorithm/ranges_partial_sort.h new file mode 100644 index 000000000000..5e82bc6fcc32 --- /dev/null +++ b/contrib/llvm-project/libcxx/include/__algorithm/ranges_partial_sort.h @@ -0,0 +1,77 @@ +//===----------------------------------------------------------------------===// +// +// 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_PARTIAL_SORT_H +#define _LIBCPP___ALGORITHM_RANGES_PARTIAL_SORT_H + +#include <__algorithm/iterator_operations.h> +#include <__algorithm/make_projected.h> +#include <__algorithm/partial_sort.h> +#include <__concepts/same_as.h> +#include <__config> +#include <__functional/identity.h> +#include <__functional/invoke.h> +#include <__functional/ranges_operations.h> +#include <__iterator/concepts.h> +#include <__iterator/iterator_traits.h> +#include <__iterator/next.h> +#include <__iterator/projected.h> +#include <__iterator/sortable.h> +#include <__ranges/access.h> +#include <__ranges/concepts.h> +#include <__ranges/dangling.h> +#include <__utility/forward.h> +#include <__utility/move.h> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +# pragma GCC system_header +#endif + +#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) + +_LIBCPP_BEGIN_NAMESPACE_STD + +namespace ranges { +namespace __partial_sort { + +struct __fn { + template <class _Iter, class _Sent, class _Comp, class _Proj> + _LIBCPP_HIDE_FROM_ABI constexpr static + _Iter __partial_sort_fn_impl(_Iter __first, _Iter __middle, _Sent __last, _Comp& __comp, _Proj& __proj) { + auto&& __projected_comp = ranges::__make_projected_comp(__comp, __proj); + return std::__partial_sort<_RangeAlgPolicy>(std::move(__first), std::move(__middle), __last, __projected_comp); + } + + template <random_access_iterator _Iter, sentinel_for<_Iter> _Sent, class _Comp = ranges::less, class _Proj = identity> + requires sortable<_Iter, _Comp, _Proj> + _LIBCPP_HIDE_FROM_ABI constexpr + _Iter operator()(_Iter __first, _Iter __middle, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const { + return __partial_sort_fn_impl(std::move(__first), std::move(__middle), std::move(__last), __comp, __proj); + } + + template <random_access_range _Range, class _Comp = ranges::less, class _Proj = identity> + requires sortable<iterator_t<_Range>, _Comp, _Proj> + _LIBCPP_HIDE_FROM_ABI constexpr + borrowed_iterator_t<_Range> operator()(_Range&& __r, iterator_t<_Range> __middle, _Comp __comp = {}, + _Proj __proj = {}) const { + return __partial_sort_fn_impl(ranges::begin(__r), std::move(__middle), ranges::end(__r), __comp, __proj); + } +}; + +} // namespace __partial_sort + +inline namespace __cpo { + inline constexpr auto partial_sort = __partial_sort::__fn{}; +} // namespace __cpo +} // namespace ranges + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) + +#endif // _LIBCPP___ALGORITHM_RANGES_PARTIAL_SORT_H |