libcxx/include/__cxx03/__algorithm/ranges_all_of.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef _LIBCPP___ALGORITHM_RANGES_ALL_OF_H
  10 #define _LIBCPP___ALGORITHM_RANGES_ALL_OF_H
  11
  12 #include <__cxx03/__config>
  13 #include <__cxx03/__functional/identity.h>
  14 #include <__cxx03/__functional/invoke.h>
  15 #include <__cxx03/__iterator/concepts.h>
  16 #include <__cxx03/__iterator/projected.h>
  17 #include <__cxx03/__ranges/access.h>
  18 #include <__cxx03/__ranges/concepts.h>
  19 #include <__cxx03/__utility/move.h>
  20
  21 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  22 #  pragma GCC system_header
  23 #endif
  24
  25 _LIBCPP_PUSH_MACROS
  26 #include <__cxx03/__undef_macros>
  27
  28 #if _LIBCPP_STD_VER >= 20
  29
  30 _LIBCPP_BEGIN_NAMESPACE_STD
  31
  32 namespace ranges {
  33 namespace __all_of {
  34 struct __fn {
  35   template <class _Iter, class _Sent, class _Proj, class _Pred>
  36   _LIBCPP_HIDE_FROM_ABI constexpr static bool __all_of_impl(_Iter __first, _Sent __last, _Pred& __pred, _Proj& __proj) {
  37     for (; __first != __last; ++__first) {
  38       if (!std::invoke(__pred, std::invoke(__proj, *__first)))
  39         return false;
  40     }
  41     return true;
  42   }
  43
  44   template <input_iterator _Iter,
  45             sentinel_for<_Iter> _Sent,
  46             class _Proj = identity,
  47             indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
  48   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool
  49   operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const {
  50     return __all_of_impl(std::move(__first), std::move(__last), __pred, __proj);
  51   }
  52
  53   template <input_range _Range,
  54             class _Proj = identity,
  55             indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
  56   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool
  57   operator()(_Range&& __range, _Pred __pred, _Proj __proj = {}) const {
  58     return __all_of_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj);
  59   }
  60 };
  61 } // namespace __all_of
  62
  63 inline namespace __cpo {
  64 inline constexpr auto all_of = __all_of::__fn{};
  65 } // namespace __cpo
  66 } // namespace ranges
  67
  68 _LIBCPP_END_NAMESPACE_STD
  69
  70 #endif // _LIBCPP_STD_VER >= 20
  71
  72 _LIBCPP_POP_MACROS
  73
  74 #endif // _LIBCPP___ALGORITHM_RANGES_ALL_OF_H