v1/__algorithm/ranges_lower_bound.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___ALGORITHM_RANGES_LOWER_BOUND_H
0010 #define _LIBCPP___ALGORITHM_RANGES_LOWER_BOUND_H
0011
0012 #include <__algorithm/iterator_operations.h>
0013 #include <__algorithm/lower_bound.h>
0014 #include <__config>
0015 #include <__functional/identity.h>
0016 #include <__functional/invoke.h>
0017 #include <__functional/ranges_operations.h>
0018 #include <__iterator/advance.h>
0019 #include <__iterator/concepts.h>
0020 #include <__iterator/iterator_traits.h>
0021 #include <__iterator/projected.h>
0022 #include <__ranges/access.h>
0023 #include <__ranges/concepts.h>
0024 #include <__ranges/dangling.h>
0025
0026 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0027 #  pragma GCC system_header
0028 #endif
0029
0030 _LIBCPP_PUSH_MACROS
0031 #include <__undef_macros>
0032
0033 #if _LIBCPP_STD_VER >= 20
0034
0035 _LIBCPP_BEGIN_NAMESPACE_STD
0036
0037 namespace ranges {
0038
0039 struct __lower_bound {
0040   template <forward_iterator _Iter,
0041             sentinel_for<_Iter> _Sent,
0042             class _Type,
0043             class _Proj                                                             = identity,
0044             indirect_strict_weak_order<const _Type*, projected<_Iter, _Proj>> _Comp = ranges::less>
0045   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Iter
0046   operator()(_Iter __first, _Sent __last, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const {
0047     return std::__lower_bound<_RangeAlgPolicy>(__first, __last, __value, __comp, __proj);
0048   }
0049
0050   template <forward_range _Range,
0051             class _Type,
0052             class _Proj                                                                          = identity,
0053             indirect_strict_weak_order<const _Type*, projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less>
0054   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range>
0055   operator()(_Range&& __r, const _Type& __value, _Comp __comp = {}, _Proj __proj = {}) const {
0056     return std::__lower_bound<_RangeAlgPolicy>(ranges::begin(__r), ranges::end(__r), __value, __comp, __proj);
0057   }
0058 };
0059
0060 inline namespace __cpo {
0061 inline constexpr auto lower_bound = __lower_bound{};
0062 } // namespace __cpo
0063 } // namespace ranges
0064
0065 _LIBCPP_END_NAMESPACE_STD
0066
0067 #endif // _LIBCPP_STD_VER >= 20
0068
0069 _LIBCPP_POP_MACROS
0070
0071 #endif // _LIBCPP___ALGORITHM_RANGES_LOWER_BOUND_H