Mercurial > hg > CbC > CbC_llvm
view libcxx/include/__algorithm/ranges_min_element.h @ 236:c4bab56944e8 llvm-original
LLVM 16
author | kono |
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date | Wed, 09 Nov 2022 17:45:10 +0900 (2022-11-09) |
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children | 1f2b6ac9f198 |
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//===----------------------------------------------------------------------===// // // 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_MIN_ELEMENT_H #define _LIBCPP___ALGORITHM_RANGES_MIN_ELEMENT_H #include <__config> #include <__functional/identity.h> #include <__functional/invoke.h> #include <__functional/ranges_operations.h> #include <__iterator/concepts.h> #include <__iterator/projected.h> #include <__ranges/access.h> #include <__ranges/concepts.h> #include <__ranges/dangling.h> #include <__utility/forward.h> #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # pragma GCC system_header #endif #if _LIBCPP_STD_VER > 17 _LIBCPP_BEGIN_NAMESPACE_STD namespace ranges { // TODO(ranges): `ranges::min_element` can now simply delegate to `std::__min_element`. template <class _Ip, class _Sp, class _Proj, class _Comp> _LIBCPP_HIDE_FROM_ABI static constexpr _Ip __min_element_impl(_Ip __first, _Sp __last, _Comp& __comp, _Proj& __proj) { if (__first == __last) return __first; _Ip __i = __first; while (++__i != __last) if (std::invoke(__comp, std::invoke(__proj, *__i), std::invoke(__proj, *__first))) __first = __i; return __first; } namespace __min_element { struct __fn { template <forward_iterator _Ip, sentinel_for<_Ip> _Sp, class _Proj = identity, indirect_strict_weak_order<projected<_Ip, _Proj>> _Comp = ranges::less> _LIBCPP_HIDE_FROM_ABI constexpr _Ip operator()(_Ip __first, _Sp __last, _Comp __comp = {}, _Proj __proj = {}) const { return ranges::__min_element_impl(__first, __last, __comp, __proj); } template <forward_range _Rp, class _Proj = identity, indirect_strict_weak_order<projected<iterator_t<_Rp>, _Proj>> _Comp = ranges::less> _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Rp> operator()(_Rp&& __r, _Comp __comp = {}, _Proj __proj = {}) const { return ranges::__min_element_impl(ranges::begin(__r), ranges::end(__r), __comp, __proj); } }; } // namespace __min_element inline namespace __cpo { inline constexpr auto min_element = __min_element::__fn{}; } // namespace __cpo } // namespace ranges _LIBCPP_END_NAMESPACE_STD #endif // _LIBCPP_STD_VER > 17 #endif // _LIBCPP___ALGORITHM_RANGES_MIN_ELEMENT_H