libcxx: update to LLVM 18

release/18.x branch, commit 78b99c73ee4b96fe9ce0e294d4632326afb2db42

This adds the flag `-D_LIBCPP_HARDENING_MODE` which is determined based
on the Zig optimization mode.

This commit also fixes libunwind, libcxx, and libcxxabi to properly
report sub compilation errors.

1 files changed, 29 insertions, 35 deletions

diff --git a/lib/libcxx/include/__tuple/tuple_element.h b/lib/libcxx/include/__tuple/tuple_element.h
index 478dd089d4..2b9ac6696c 100644
--- a/lib/libcxx/include/__tuple/tuple_element.h
+++ b/lib/libcxx/include/__tuple/tuple_element.h
@@ -23,68 +23,62 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template <size_t _Ip, class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_element;
+template <size_t _Ip, class _Tp>
+struct _LIBCPP_TEMPLATE_VIS tuple_element;
 
 template <size_t _Ip, class _Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const _Tp>
-{
-    typedef _LIBCPP_NODEBUG typename add_const<typename tuple_element<_Ip, _Tp>::type>::type type;
+struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const _Tp> {
+  typedef _LIBCPP_NODEBUG typename add_const<typename tuple_element<_Ip, _Tp>::type>::type type;
 };
 
 template <size_t _Ip, class _Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, volatile _Tp>
-{
-    typedef _LIBCPP_NODEBUG typename add_volatile<typename tuple_element<_Ip, _Tp>::type>::type type;
+struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, volatile _Tp> {
+  typedef _LIBCPP_NODEBUG typename add_volatile<typename tuple_element<_Ip, _Tp>::type>::type type;
 };
 
 template <size_t _Ip, class _Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const volatile _Tp>
-{
-    typedef _LIBCPP_NODEBUG typename add_cv<typename tuple_element<_Ip, _Tp>::type>::type type;
+struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const volatile _Tp> {
+  typedef _LIBCPP_NODEBUG typename add_cv<typename tuple_element<_Ip, _Tp>::type>::type type;
 };
 
 #ifndef _LIBCPP_CXX03_LANG
 
-#if !__has_builtin(__type_pack_element)
+#  if !__has_builtin(__type_pack_element)
 
 namespace __indexer_detail {
 
 template <size_t _Idx, class _Tp>
-struct __indexed { using type _LIBCPP_NODEBUG = _Tp; };
+struct __indexed {
+  using type _LIBCPP_NODEBUG = _Tp;
+};
 
-template <class _Types, class _Indexes> struct __indexer;
+template <class _Types, class _Indexes>
+struct __indexer;
 
-template <class ..._Types, size_t ..._Idx>
-struct __indexer<__tuple_types<_Types...>, __tuple_indices<_Idx...>>
-    : __indexed<_Idx, _Types>...
-{};
+template <class... _Types, size_t... _Idx>
+struct __indexer<__tuple_types<_Types...>, __tuple_indices<_Idx...>> : __indexed<_Idx, _Types>... {};
 
 template <size_t _Idx, class _Tp>
 __indexed<_Idx, _Tp> __at_index(__indexed<_Idx, _Tp> const&);
 
 } // namespace __indexer_detail
 
-template <size_t _Idx, class ..._Types>
-using __type_pack_element _LIBCPP_NODEBUG = typename decltype(
-    __indexer_detail::__at_index<_Idx>(
-        __indexer_detail::__indexer<
-            __tuple_types<_Types...>,
-            typename __make_tuple_indices<sizeof...(_Types)>::type
-        >{})
-  )::type;
-#endif
+template <size_t _Idx, class... _Types>
+using __type_pack_element _LIBCPP_NODEBUG = typename decltype(__indexer_detail::__at_index<_Idx>(
+    __indexer_detail::__indexer< __tuple_types<_Types...>,
+                                 typename __make_tuple_indices<sizeof...(_Types)>::type >{}))::type;
+#  endif
 
-template <size_t _Ip, class ..._Types>
-struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, __tuple_types<_Types...> >
-{
-    static_assert(_Ip < sizeof...(_Types), "tuple_element index out of range");
-    typedef _LIBCPP_NODEBUG __type_pack_element<_Ip, _Types...> type;
+template <size_t _Ip, class... _Types>
+struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, __tuple_types<_Types...> > {
+  static_assert(_Ip < sizeof...(_Types), "tuple_element index out of range");
+  typedef _LIBCPP_NODEBUG __type_pack_element<_Ip, _Types...> type;
 };
 
-#if _LIBCPP_STD_VER >= 14
-template <size_t _Ip, class ..._Tp>
-using tuple_element_t _LIBCPP_NODEBUG = typename tuple_element <_Ip, _Tp...>::type;
-#endif
+#  if _LIBCPP_STD_VER >= 14
+template <size_t _Ip, class... _Tp>
+using tuple_element_t _LIBCPP_NODEBUG = typename tuple_element<_Ip, _Tp...>::type;
+#  endif
 
 #endif // _LIBCPP_CXX03_LANG