forked from OSchip/llvm-project
107 lines
3.0 KiB
C++
107 lines
3.0 KiB
C++
// -*- 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 <__utility/auto_cast.h>
|
|
#include <type_traits>
|
|
|
|
#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
|