Release Cosmopolitan v3.6.0

This release is an atomic upgrade to GCC 14.1.0 with C23 and C++23

third_party/libcxx/__fwd/array.h

@@ -21,6 +21,26 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 template <class _Tp, size_t _Size>
 struct _LIBCPP_TEMPLATE_VIS array;
 
+template <size_t _Ip, class _Tp, size_t _Size>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Tp& get(array<_Tp, _Size>&) _NOEXCEPT;
+
+template <size_t _Ip, class _Tp, size_t _Size>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const _Tp& get(const array<_Tp, _Size>&) _NOEXCEPT;
+
+#ifndef _LIBCPP_CXX03_LANG
+template <size_t _Ip, class _Tp, size_t _Size>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Tp&& get(array<_Tp, _Size>&&) _NOEXCEPT;
+
+template <size_t _Ip, class _Tp, size_t _Size>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const _Tp&& get(const array<_Tp, _Size>&&) _NOEXCEPT;
+#endif
+
+template <class>
+struct __is_std_array : false_type {};
+
+template <class _Tp, size_t _Size>
+struct __is_std_array<array<_Tp, _Size> > : true_type {};
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // _LIBCPP___FWD_ARRAY_H

third_party/libcxx/__fwd/bit_reference.h

@@ -0,0 +1,25 @@
+//===----------------------------------------------------------------------===//
+//
+// 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_BIT_REFERENCE_H
+#define _LIBCPP___FWD_BIT_REFERENCE_H
+
+#include <__config>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _Cp, bool _IsConst, typename _Cp::__storage_type = 0>
+class __bit_iterator;
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___FWD_BIT_REFERENCE_H

third_party/libcxx/__fwd/complex.h

@@ -0,0 +1,42 @@
+//===---------------------------------------------------------------------===//
+//
+// 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_COMPLEX_H
+#define _LIBCPP___FWD_COMPLEX_H
+
+#include <__config>
+#include <cstddef>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _Tp>
+class _LIBCPP_TEMPLATE_VIS complex;
+
+#if _LIBCPP_STD_VER >= 26
+
+template <size_t _Ip, class _Tp>
+_LIBCPP_HIDE_FROM_ABI constexpr _Tp& get(complex<_Tp>&) noexcept;
+
+template <size_t _Ip, class _Tp>
+_LIBCPP_HIDE_FROM_ABI constexpr _Tp&& get(complex<_Tp>&&) noexcept;
+
+template <size_t _Ip, class _Tp>
+_LIBCPP_HIDE_FROM_ABI constexpr const _Tp& get(const complex<_Tp>&) noexcept;
+
+template <size_t _Ip, class _Tp>
+_LIBCPP_HIDE_FROM_ABI constexpr const _Tp&& get(const complex<_Tp>&&) noexcept;
+
+#endif // _LIBCPP_STD_VER >= 26
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___FWD_COMPLEX_H

third_party/libcxx/__fwd/deque.h

@@ -0,0 +1,26 @@
+//===---------------------------------------------------------------------===//
+//
+// 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_DEQUE_H
+#define _LIBCPP___FWD_DEQUE_H
+
+#include <__config>
+#include <__fwd/memory.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _Tp, class _Allocator = allocator<_Tp> >
+class _LIBCPP_TEMPLATE_VIS deque;
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___FWD_DEQUE_H

third_party/libcxx/__fwd/format.h

@@ -0,0 +1,38 @@
+// -*- 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_FORMAT_H
+#define _LIBCPP___FWD_FORMAT_H
+
+#include <__config>
+#include <__iterator/concepts.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if _LIBCPP_STD_VER >= 20
+
+template <class _Context>
+class _LIBCPP_TEMPLATE_VIS basic_format_arg;
+
+template <class _OutIt, class _CharT>
+  requires output_iterator<_OutIt, const _CharT&>
+class _LIBCPP_TEMPLATE_VIS basic_format_context;
+
+template <class _Tp, class _CharT = char>
+struct _LIBCPP_TEMPLATE_VIS formatter;
+
+#endif //_LIBCPP_STD_VER >= 20
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___FWD_FORMAT_H

third_party/libcxx/__fwd/functional.h

@@ -0,0 +1,28 @@
+//===---------------------------------------------------------------------===//
+//
+// 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_FUNCTIONAL_H
+#define _LIBCPP___FWD_FUNCTIONAL_H
+
+#include <__config>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class>
+struct _LIBCPP_TEMPLATE_VIS hash;
+
+template <class>
+class _LIBCPP_TEMPLATE_VIS reference_wrapper;
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___FWD_FUNCTIONAL_H

third_party/libcxx/__fwd/get.h

@@ -1,115 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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_GET_H
-#define _LIBCPP___FWD_GET_H
-
-#include <__concepts/copyable.h>
-#include <__config>
-#include <__fwd/array.h>
-#include <__fwd/pair.h>
-#include <__fwd/subrange.h>
-#include <__fwd/tuple.h>
-#include <__tuple/tuple_element.h>
-#include <cstddef>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#  pragma GCC system_header
-#endif
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-#ifndef _LIBCPP_CXX03_LANG
-
-template <size_t _Ip, class ..._Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-typename tuple_element<_Ip, tuple<_Tp...> >::type&
-get(tuple<_Tp...>&) _NOEXCEPT;
-
-template <size_t _Ip, class ..._Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-const typename tuple_element<_Ip, tuple<_Tp...> >::type&
-get(const tuple<_Tp...>&) _NOEXCEPT;
-
-template <size_t _Ip, class ..._Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-typename tuple_element<_Ip, tuple<_Tp...> >::type&&
-get(tuple<_Tp...>&&) _NOEXCEPT;
-
-template <size_t _Ip, class ..._Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-const typename tuple_element<_Ip, tuple<_Tp...> >::type&&
-get(const tuple<_Tp...>&&) _NOEXCEPT;
-
-#endif //_LIBCPP_CXX03_LANG
-
-template <size_t _Ip, class _T1, class _T2>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-typename tuple_element<_Ip, pair<_T1, _T2> >::type&
-get(pair<_T1, _T2>&) _NOEXCEPT;
-
-template <size_t _Ip, class _T1, class _T2>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-const typename tuple_element<_Ip, pair<_T1, _T2> >::type&
-get(const pair<_T1, _T2>&) _NOEXCEPT;
-
-#ifndef _LIBCPP_CXX03_LANG
-template <size_t _Ip, class _T1, class _T2>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
-get(pair<_T1, _T2>&&) _NOEXCEPT;
-
-template <size_t _Ip, class _T1, class _T2>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-const typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
-get(const pair<_T1, _T2>&&) _NOEXCEPT;
-#endif
-
-template <size_t _Ip, class _Tp, size_t _Size>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-_Tp&
-get(array<_Tp, _Size>&) _NOEXCEPT;
-
-template <size_t _Ip, class _Tp, size_t _Size>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-const _Tp&
-get(const array<_Tp, _Size>&) _NOEXCEPT;
-
-#ifndef _LIBCPP_CXX03_LANG
-template <size_t _Ip, class _Tp, size_t _Size>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-_Tp&&
-get(array<_Tp, _Size>&&) _NOEXCEPT;
-
-template <size_t _Ip, class _Tp, size_t _Size>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
-const _Tp&&
-get(const array<_Tp, _Size>&&) _NOEXCEPT;
-#endif
-
-#if _LIBCPP_STD_VER >= 20
-
-namespace ranges {
-
-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>& __subrange);
-
-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>&& __subrange);
-
-} // namespace ranges
-
-using ranges::get;
-
-#endif // _LIBCPP_STD_VER >= 20
-
-_LIBCPP_END_NAMESPACE_STD
-
-#endif // _LIBCPP___FWD_GET_H

third_party/libcxx/__fwd/ios.h

@@ -18,6 +18,8 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
+class _LIBCPP_EXPORTED_FROM_ABI ios_base;
+
 template <class _CharT, class _Traits = char_traits<_CharT> >
 class _LIBCPP_TEMPLATE_VIS basic_ios;
 

third_party/libcxx/__fwd/mdspan.h

@@ -0,0 +1,57 @@
+// -*- 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
+//
+//                        Kokkos v. 4.0
+//       Copyright (2022) National Technology & Engineering
+//               Solutions of Sandia, LLC (NTESS).
+//
+// Under the terms of Contract DE-NA0003525 with NTESS,
+// the U.S. Government retains certain rights in this software.
+//
+//===---------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___MDSPAN_LAYOUTS_H
+#define _LIBCPP___MDSPAN_LAYOUTS_H
+
+#include <__config>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if _LIBCPP_STD_VER >= 23
+
+// Layout policy with a mapping which corresponds to FORTRAN-style array layouts
+struct layout_left {
+  template <class _Extents>
+  class mapping;
+};
+
+// Layout policy with a mapping which corresponds to C-style array layouts
+struct layout_right {
+  template <class _Extents>
+  class mapping;
+};
+
+// Layout policy with a unique mapping where strides are arbitrary
+struct layout_stride {
+  template <class _Extents>
+  class mapping;
+};
+
+#endif // _LIBCPP_STD_VER >= 23
+
+_LIBCPP_END_NAMESPACE_STD
+
+_LIBCPP_POP_MACROS
+
+#endif // _LIBCPP___MDSPAN_LAYOUTS_H

third_party/libcxx/__fwd/memory.h

@@ -6,8 +6,8 @@
 //
 //===---------------------------------------------------------------------===//
 
-#ifndef _LIBCPP___FWD_HASH_H
-#define _LIBCPP___FWD_HASH_H
+#ifndef _LIBCPP___FWD_MEMORY_H
+#define _LIBCPP___FWD_MEMORY_H
 
 #include <__config>
 
@@ -17,9 +17,9 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template <class>
-struct _LIBCPP_TEMPLATE_VIS hash;
+template <class _Tp>
+class _LIBCPP_TEMPLATE_VIS allocator;
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP___FWD_HASH_H
+#endif // _LIBCPP___FWD_MEMORY_H

third_party/libcxx/__fwd/memory_resource.h

@@ -19,7 +19,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 
 namespace pmr {
 template <class _ValueType>
-class _LIBCPP_TEMPLATE_VIS polymorphic_allocator;
+class _LIBCPP_AVAILABILITY_PMR _LIBCPP_TEMPLATE_VIS polymorphic_allocator;
 } // namespace pmr
 
 _LIBCPP_END_NAMESPACE_STD

third_party/libcxx/__fwd/pair.h

@@ -10,6 +10,8 @@
 #define _LIBCPP___FWD_PAIR_H
 
 #include <__config>
+#include <__fwd/tuple.h>
+#include <cstddef>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -20,6 +22,24 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 template <class, class>
 struct _LIBCPP_TEMPLATE_VIS pair;
 
+template <size_t _Ip, class _T1, class _T2>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, pair<_T1, _T2> >::type&
+get(pair<_T1, _T2>&) _NOEXCEPT;
+
+template <size_t _Ip, class _T1, class _T2>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, pair<_T1, _T2> >::type&
+get(const pair<_T1, _T2>&) _NOEXCEPT;
+
+#ifndef _LIBCPP_CXX03_LANG
+template <size_t _Ip, class _T1, class _T2>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
+get(pair<_T1, _T2>&&) _NOEXCEPT;
+
+template <size_t _Ip, class _T1, class _T2>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
+get(const pair<_T1, _T2>&&) _NOEXCEPT;
+#endif
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // _LIBCPP___FWD_PAIR_H

third_party/libcxx/__fwd/queue.h

@@ -0,0 +1,31 @@
+//===---------------------------------------------------------------------===//
+//
+// 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_QUEUE_H
+#define _LIBCPP___FWD_QUEUE_H
+
+#include <__config>
+#include <__functional/operations.h>
+#include <__fwd/deque.h>
+#include <__fwd/vector.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _Tp, class _Container = deque<_Tp> >
+class _LIBCPP_TEMPLATE_VIS queue;
+
+template <class _Tp, class _Container = vector<_Tp>, class _Compare = less<typename _Container::value_type> >
+class _LIBCPP_TEMPLATE_VIS priority_queue;
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___FWD_QUEUE_H

third_party/libcxx/__fwd/span.h

@@ -26,7 +26,8 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 #if _LIBCPP_STD_VER >= 20
 
 inline constexpr size_t dynamic_extent = numeric_limits<size_t>::max();
-template <typename _Tp, size_t _Extent = dynamic_extent> class span;
+template <typename _Tp, size_t _Extent = dynamic_extent>
+class span;
 
 #endif
 

third_party/libcxx/__fwd/sstream.h

@@ -10,6 +10,7 @@
 #define _LIBCPP___FWD_SSTREAM_H
 
 #include <__config>
+#include <__fwd/memory.h>
 #include <__fwd/string.h>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)

third_party/libcxx/__fwd/stack.h

@@ -0,0 +1,26 @@
+//===---------------------------------------------------------------------===//
+//
+// 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_STACK_H
+#define _LIBCPP___FWD_STACK_H
+
+#include <__config>
+#include <__fwd/deque.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _Tp, class _Container = deque<_Tp> >
+class _LIBCPP_TEMPLATE_VIS stack;
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___FWD_STACK_H

third_party/libcxx/__fwd/string.h

@@ -10,6 +10,7 @@
 #define _LIBCPP___FWD_STRING_H
 
 #include <__config>
+#include <__fwd/memory.h>
 #include <__fwd/memory_resource.h>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -38,9 +39,6 @@ template <>
 struct char_traits<wchar_t>;
 #endif
 
-template <class _Tp>
-class _LIBCPP_TEMPLATE_VIS allocator;
-
 template <class _CharT, class _Traits = char_traits<_CharT>, class _Allocator = allocator<_CharT> >
 class _LIBCPP_TEMPLATE_VIS basic_string;
 
@@ -61,21 +59,20 @@ using u32string = basic_string<char32_t>;
 
 namespace pmr {
 template <class _CharT, class _Traits = char_traits<_CharT>>
-using basic_string = std::basic_string<_CharT, _Traits, polymorphic_allocator<_CharT>>;
+using basic_string _LIBCPP_AVAILABILITY_PMR = std::basic_string<_CharT, _Traits, polymorphic_allocator<_CharT>>;
 
-using string = basic_string<char>;
+using string _LIBCPP_AVAILABILITY_PMR = basic_string<char>;
 
 #  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
-using wstring = basic_string<wchar_t>;
+using wstring _LIBCPP_AVAILABILITY_PMR = basic_string<wchar_t>;
 #  endif
 
 #  ifndef _LIBCPP_HAS_NO_CHAR8_T
-using u8string = basic_string<char8_t>;
+using u8string _LIBCPP_AVAILABILITY_PMR = basic_string<char8_t>;
 #  endif
 
-using u16string = basic_string<char16_t>;
-using u32string = basic_string<char32_t>;
-
+using u16string _LIBCPP_AVAILABILITY_PMR = basic_string<char16_t>;
+using u32string _LIBCPP_AVAILABILITY_PMR = basic_string<char32_t>;
 } // namespace pmr
 
 #endif // _LIBCPP_STD_VER >= 17

third_party/libcxx/__fwd/string_view.h

@@ -11,7 +11,7 @@
 #define _LIBCPP___FWD_STRING_VIEW_H
 
 #include <__config>
-#include <iosfwd> // char_traits
+#include <__fwd/string.h>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -19,17 +19,17 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template<class _CharT, class _Traits = char_traits<_CharT> >
+template <class _CharT, class _Traits = char_traits<_CharT> >
 class _LIBCPP_TEMPLATE_VIS basic_string_view;
 
-typedef basic_string_view<char>     string_view;
+typedef basic_string_view<char> string_view;
 #ifndef _LIBCPP_HAS_NO_CHAR8_T
-typedef basic_string_view<char8_t>  u8string_view;
+typedef basic_string_view<char8_t> u8string_view;
 #endif
 typedef basic_string_view<char16_t> u16string_view;
 typedef basic_string_view<char32_t> u32string_view;
 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
-typedef basic_string_view<wchar_t>  wstring_view;
+typedef basic_string_view<wchar_t> wstring_view;
 #endif
 
 // clang-format off

third_party/libcxx/__fwd/subrange.h

@@ -9,7 +9,10 @@
 #ifndef _LIBCPP___FWD_SUBRANGE_H
 #define _LIBCPP___FWD_SUBRANGE_H
 
+#include <__concepts/copyable.h>
 #include <__config>
+#include <__iterator/concepts.h>
+#include <cstddef>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -17,20 +20,28 @@
 
 #if _LIBCPP_STD_VER >= 20
 
-#include <__iterator/concepts.h>
-
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 namespace ranges {
 
-enum class _LIBCPP_ENUM_VIS subrange_kind : bool { unsized, sized };
+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

third_party/libcxx/__fwd/tuple.h

@@ -10,6 +10,7 @@
 #define _LIBCPP___FWD_TUPLE_H
 
 #include <__config>
+#include <cstddef>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
@@ -17,11 +18,33 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
+template <size_t, class>
+struct _LIBCPP_TEMPLATE_VIS tuple_element;
+
 #ifndef _LIBCPP_CXX03_LANG
 
 template <class...>
 class _LIBCPP_TEMPLATE_VIS tuple;
 
+template <class>
+struct _LIBCPP_TEMPLATE_VIS tuple_size;
+
+template <size_t _Ip, class... _Tp>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, tuple<_Tp...> >::type&
+get(tuple<_Tp...>&) _NOEXCEPT;
+
+template <size_t _Ip, class... _Tp>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, tuple<_Tp...> >::type&
+get(const tuple<_Tp...>&) _NOEXCEPT;
+
+template <size_t _Ip, class... _Tp>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, tuple<_Tp...> >::type&&
+get(tuple<_Tp...>&&) _NOEXCEPT;
+
+template <size_t _Ip, class... _Tp>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, tuple<_Tp...> >::type&&
+get(const tuple<_Tp...>&&) _NOEXCEPT;
+
 #endif // _LIBCPP_CXX03_LANG
 
 _LIBCPP_END_NAMESPACE_STD

third_party/libcxx/__fwd/vector.h

@@ -0,0 +1,26 @@
+//===---------------------------------------------------------------------===//
+//
+// 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_VECTOR_H
+#define _LIBCPP___FWD_VECTOR_H
+
+#include <__config>
+#include <__fwd/memory.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _Tp, class _Alloc = allocator<_Tp> >
+class _LIBCPP_TEMPLATE_VIS vector;
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___FWD_VECTOR_H