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- // -*- C++ -*-
- //===----------------------------------------------------------------------===//
- //
- // 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 <__concepts/class_or_enum.h>
- #include <__config>
- #include <__iterator/concepts.h>
- #include <__iterator/iterator_traits.h>
- #include <__memory/pointer_traits.h>
- #include <__ranges/access.h>
- #include <__type_traits/decay.h>
- #include <__type_traits/is_object.h>
- #include <__type_traits/is_pointer.h>
- #include <__type_traits/is_reference.h>
- #include <__type_traits/remove_pointer.h>
- #include <__type_traits/remove_reference.h>
- #include <__utility/auto_cast.h>
- #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
- # pragma GCC system_header
- #endif
- _LIBCPP_BEGIN_NAMESPACE_STD
- #if _LIBCPP_STD_VER > 17
- // [range.prim.data]
- namespace ranges {
- 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 =
- __can_borrow<_Tp> &&
- __workaround_52970<_Tp> &&
- requires(_Tp&& __t) {
- { _LIBCPP_AUTO_CAST(__t.data()) } -> __ptr_to_object;
- };
- template <class _Tp>
- concept __ranges_begin_invocable =
- !__member_data<_Tp> &&
- __can_borrow<_Tp> &&
- requires(_Tp&& __t) {
- { ranges::begin(__t) } -> contiguous_iterator;
- };
- struct __fn {
- template <__member_data _Tp>
- _LIBCPP_HIDE_FROM_ABI
- constexpr auto operator()(_Tp&& __t) const
- noexcept(noexcept(__t.data())) {
- return __t.data();
- }
- template<__ranges_begin_invocable _Tp>
- _LIBCPP_HIDE_FROM_ABI
- constexpr auto operator()(_Tp&& __t) const
- noexcept(noexcept(std::to_address(ranges::begin(__t)))) {
- return std::to_address(ranges::begin(__t));
- }
- };
- } // namespace __data
- inline namespace __cpo {
- inline constexpr auto data = __data::__fn{};
- } // namespace __cpo
- } // namespace ranges
- // [range.prim.cdata]
- namespace ranges {
- namespace __cdata {
- struct __fn {
- template <class _Tp>
- requires is_lvalue_reference_v<_Tp&&>
- [[nodiscard]] _LIBCPP_HIDE_FROM_ABI
- constexpr auto operator()(_Tp&& __t) const
- noexcept(noexcept(ranges::data(static_cast<const remove_reference_t<_Tp>&>(__t))))
- -> decltype( ranges::data(static_cast<const remove_reference_t<_Tp>&>(__t)))
- { return ranges::data(static_cast<const remove_reference_t<_Tp>&>(__t)); }
- template <class _Tp>
- requires is_rvalue_reference_v<_Tp&&>
- [[nodiscard]] _LIBCPP_HIDE_FROM_ABI
- constexpr auto operator()(_Tp&& __t) const
- noexcept(noexcept(ranges::data(static_cast<const _Tp&&>(__t))))
- -> decltype( ranges::data(static_cast<const _Tp&&>(__t)))
- { return ranges::data(static_cast<const _Tp&&>(__t)); }
- };
- } // namespace __cdata
- inline namespace __cpo {
- inline constexpr auto cdata = __cdata::__fn{};
- } // namespace __cpo
- } // namespace ranges
- #endif // _LIBCPP_STD_VER > 17
- _LIBCPP_END_NAMESPACE_STD
- #endif // _LIBCPP___RANGES_DATA_H
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