mirror of
https://github.com/jart/cosmopolitan.git
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80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
//===----------------------------------------------------------------------===//
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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_FIND_H
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#define _LIBCPP___ALGORITHM_RANGES_FIND_H
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#include <__algorithm/find.h>
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#include <__algorithm/ranges_find_if.h>
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#include <__algorithm/unwrap_range.h>
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#include <__config>
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#include <__functional/identity.h>
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#include <__functional/invoke.h>
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#include <__functional/ranges_operations.h>
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#include <__iterator/concepts.h>
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#include <__iterator/projected.h>
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#include <__ranges/access.h>
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#include <__ranges/concepts.h>
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#include <__ranges/dangling.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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namespace __find {
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struct __fn {
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template <class _Iter, class _Sent, class _Tp, class _Proj>
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_LIBCPP_HIDE_FROM_ABI static constexpr _Iter
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__find_unwrap(_Iter __first, _Sent __last, const _Tp& __value, _Proj& __proj) {
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if constexpr (forward_iterator<_Iter>) {
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auto [__first_un, __last_un] = std::__unwrap_range(__first, std::move(__last));
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return std::__rewrap_range<_Sent>(
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std::move(__first), std::__find(std::move(__first_un), std::move(__last_un), __value, __proj));
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} else {
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return std::__find(std::move(__first), std::move(__last), __value, __proj);
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}
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}
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template <input_iterator _Ip, sentinel_for<_Ip> _Sp, class _Tp, class _Proj = identity>
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requires indirect_binary_predicate<ranges::equal_to, projected<_Ip, _Proj>, const _Tp*>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Ip
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operator()(_Ip __first, _Sp __last, const _Tp& __value, _Proj __proj = {}) const {
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return __find_unwrap(std::move(__first), std::move(__last), __value, __proj);
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}
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template <input_range _Rp, class _Tp, class _Proj = identity>
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requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Rp>, _Proj>, const _Tp*>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Rp>
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operator()(_Rp&& __r, const _Tp& __value, _Proj __proj = {}) const {
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return __find_unwrap(ranges::begin(__r), ranges::end(__r), __value, __proj);
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}
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};
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} // namespace __find
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inline namespace __cpo {
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inline constexpr auto find = __find::__fn{};
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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_FIND_H
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