diff options
Diffstat (limited to 'contrib/llvm-project/libcxx/include/__ranges/data.h')
-rw-r--r-- | contrib/llvm-project/libcxx/include/__ranges/data.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__ranges/data.h b/contrib/llvm-project/libcxx/include/__ranges/data.h new file mode 100644 index 000000000000..dae30984d3f9 --- /dev/null +++ b/contrib/llvm-project/libcxx/include/__ranges/data.h @@ -0,0 +1,86 @@ +// -*- C++ -*- +//===------------------------ __ranges/data.h ------------------------------===// +// +// 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___RANGES_DATA_H +#define _LIBCPP___RANGES_DATA_H + +#include <__config> +#include <__iterator/concepts.h> +#include <__iterator/iterator_traits.h> +#include <__memory/pointer_traits.h> +#include <__ranges/access.h> +#include <__utility/forward.h> +#include <concepts> +#include <type_traits> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +#if !defined(_LIBCPP_HAS_NO_RANGES) + +// clang-format off +namespace ranges { +// [range.prim.data] +namespace __data { + template <class _Tp> + concept __ptr_to_object = is_pointer_v<_Tp> && is_object_v<remove_pointer_t<_Tp>>; + + template <class _Tp> + concept __member_data = + requires(_Tp&& __t) { + { _VSTD::forward<_Tp>(__t) } -> __can_borrow; + { __t.data() } -> __ptr_to_object; + }; + + template <class _Tp> + concept __ranges_begin_invocable = + !__member_data<_Tp> && + requires(_Tp&& __t) { + { _VSTD::forward<_Tp>(__t) } -> __can_borrow; + { ranges::begin(_VSTD::forward<_Tp>(__t)) } -> contiguous_iterator; + }; + + struct __fn { + template <__member_data _Tp> + requires __can_borrow<_Tp> + _LIBCPP_HIDE_FROM_ABI + constexpr __ptr_to_object auto operator()(_Tp&& __t) const + noexcept(noexcept(__t.data())) { + return __t.data(); + } + + template<__ranges_begin_invocable _Tp> + requires __can_borrow<_Tp> + _LIBCPP_HIDE_FROM_ABI + constexpr __ptr_to_object auto operator()(_Tp&& __t) const + noexcept(noexcept(_VSTD::to_address(ranges::begin(_VSTD::forward<_Tp>(__t))))) { + return _VSTD::to_address(ranges::begin(_VSTD::forward<_Tp>(__t))); + } + }; +} // end namespace __data + +inline namespace __cpo { + inline constexpr const auto data = __data::__fn{}; +} // namespace __cpo +} // namespace ranges + +// clang-format off + +#endif // !defined(_LIBCPP_HAS_NO_RANGES) + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +#endif // _LIBCPP___RANGES_DATA_H |