__cxx03/__algorithm/ranges_any_of.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___CXX03___ALGORITHM_RANGES_ANY_OF_H
0010 #define _LIBCPP___CXX03___ALGORITHM_RANGES_ANY_OF_H
0011
0012 #include <__cxx03/__config>
0013 #include <__cxx03/__functional/identity.h>
0014 #include <__cxx03/__functional/invoke.h>
0015 #include <__cxx03/__iterator/concepts.h>
0016 #include <__cxx03/__iterator/projected.h>
0017 #include <__cxx03/__ranges/access.h>
0018 #include <__cxx03/__ranges/concepts.h>
0019 #include <__cxx03/__utility/move.h>
0020
0021 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0022 #  pragma GCC system_header
0023 #endif
0024
0025 _LIBCPP_PUSH_MACROS
0026 #include <__cxx03/__undef_macros>
0027
0028 #if _LIBCPP_STD_VER >= 20
0029
0030 _LIBCPP_BEGIN_NAMESPACE_STD
0031
0032 namespace ranges {
0033 namespace __any_of {
0034 struct __fn {
0035   template <class _Iter, class _Sent, class _Proj, class _Pred>
0036   _LIBCPP_HIDE_FROM_ABI constexpr static bool __any_of_impl(_Iter __first, _Sent __last, _Pred& __pred, _Proj& __proj) {
0037     for (; __first != __last; ++__first) {
0038       if (std::invoke(__pred, std::invoke(__proj, *__first)))
0039         return true;
0040     }
0041     return false;
0042   }
0043
0044   template <input_iterator _Iter,
0045             sentinel_for<_Iter> _Sent,
0046             class _Proj = identity,
0047             indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
0048   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool
0049   operator()(_Iter __first, _Sent __last, _Pred __pred = {}, _Proj __proj = {}) const {
0050     return __any_of_impl(std::move(__first), std::move(__last), __pred, __proj);
0051   }
0052
0053   template <input_range _Range,
0054             class _Proj = identity,
0055             indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
0056   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool
0057   operator()(_Range&& __range, _Pred __pred, _Proj __proj = {}) const {
0058     return __any_of_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj);
0059   }
0060 };
0061 } // namespace __any_of
0062
0063 inline namespace __cpo {
0064 inline constexpr auto any_of = __any_of::__fn{};
0065 } // namespace __cpo
0066 } // namespace ranges
0067
0068 _LIBCPP_END_NAMESPACE_STD
0069
0070 #endif // _LIBCPP_STD_VER >= 20
0071
0072 _LIBCPP_POP_MACROS
0073
0074 #endif // _LIBCPP___CXX03___ALGORITHM_RANGES_ANY_OF_H