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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.
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
//===---------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===---------------------------------------------------------------------===//
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#ifndef _LIBCPP___FWD_TUPLE_H
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#define _LIBCPP___FWD_TUPLE_H
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#include <__config>
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#include <__cstddef/size_t.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <size_t, class>
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struct _LIBCPP_TEMPLATE_VIS tuple_element;
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#ifndef _LIBCPP_CXX03_LANG
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template <class...>
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class _LIBCPP_TEMPLATE_VIS tuple;
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template <class>
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struct _LIBCPP_TEMPLATE_VIS tuple_size;
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template <size_t _Ip, class... _Tp>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, tuple<_Tp...> >::type&
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get(tuple<_Tp...>&) _NOEXCEPT;
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template <size_t _Ip, class... _Tp>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, tuple<_Tp...> >::type&
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get(const tuple<_Tp...>&) _NOEXCEPT;
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template <size_t _Ip, class... _Tp>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, tuple<_Tp...> >::type&&
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get(tuple<_Tp...>&&) _NOEXCEPT;
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template <size_t _Ip, class... _Tp>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, tuple<_Tp...> >::type&&
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get(const tuple<_Tp...>&&) _NOEXCEPT;
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#endif // _LIBCPP_CXX03_LANG
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___FWD_TUPLE_H
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