mirror of
https://github.com/llvm/llvm-project.git
synced 2025-05-01 14:16:09 +00:00
d6832a611a
Many headers include `<cstddef>` just for size_t, and pulling in additional content (e.g. the traits used for std::byte) is unnecessary. To solve this problem, this patch splits up `<cstddef>` into subcomponents so that headers can include only the parts that they actually require. This has the added benefit of making the modules build a lot stricter with respect to IWYU, and also providing a canonical location where we define `std::size_t` and friends (which were previously defined in multiple headers like `<cstddef>` and `<ctime>`). After this patch, there's still many places in the codebase where we include `<cstddef>` when `<__cstddef/size_t.h>` would be sufficient. This patch focuses on removing `<cstddef>` includes from __type_traits to make these headers non-circular with `<cstddef>`. Additional refactorings can be tackled separately.
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
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___FWD_SUBRANGE_H
|
|
#define _LIBCPP___FWD_SUBRANGE_H
|
|
|
|
#include <__concepts/copyable.h>
|
|
#include <__config>
|
|
#include <__cstddef/size_t.h>
|
|
#include <__iterator/concepts.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
#if _LIBCPP_STD_VER >= 20
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
namespace ranges {
|
|
|
|
enum class subrange_kind : bool { unsized, sized };
|
|
|
|
template <input_or_output_iterator _Iter, sentinel_for<_Iter> _Sent, subrange_kind _Kind>
|
|
requires(_Kind == subrange_kind::sized || !sized_sentinel_for<_Sent, _Iter>)
|
|
class _LIBCPP_TEMPLATE_VIS subrange;
|
|
|
|
template <size_t _Index, class _Iter, class _Sent, subrange_kind _Kind>
|
|
requires((_Index == 0 && copyable<_Iter>) || _Index == 1)
|
|
_LIBCPP_HIDE_FROM_ABI constexpr auto get(const subrange<_Iter, _Sent, _Kind>&);
|
|
|
|
template <size_t _Index, class _Iter, class _Sent, subrange_kind _Kind>
|
|
requires(_Index < 2)
|
|
_LIBCPP_HIDE_FROM_ABI constexpr auto get(subrange<_Iter, _Sent, _Kind>&&);
|
|
|
|
} // namespace ranges
|
|
|
|
using ranges::get;
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_STD_VER >= 20
|
|
|
|
#endif // _LIBCPP___FWD_SUBRANGE_H
|