[libcxx] Use of std::aligned_storage deprecated in C++23 #62844
Description
Building libcxx with C++23 emits a bunch of deprecation warnings due to the use of std::aligned_storage in a few libcxx sources.
This seems to be the only kind of warning triggered by C++23 though. (supported) Tests seem to pass as well 😊
/home/aaron/aaronmondal/llvm-project/libcxx/src/include/sso_allocator.h:37:14: warning: 'aligned_storage<240>' is deprecated [-Wdeprecated-declarations]
typename aligned_storage<sizeof(_Tp) * _Np>::type buf_;
^
/home/aaron/aaronmondal/llvm-project/build/include/c++/v1/__memory/allocator_traits.h:238:33: note: in instantiation of template class 'std::__sso_allocator<std::locale::facet *, 30>' requested here
using value_type = typename allocator_type::value_type;
^
/home/aaron/aaronmondal/llvm-project/build/include/c++/v1/vector:390:22: note: in instantiation of template class 'std::allocator_traits<std::__sso_allocator<std::locale::facet *, 30>>' requested here
typedef typename __alloc_traits::size_type size_type;
^
/home/aaron/aaronmondal/llvm-project/libcxx/src/locale.cpp:138:49: note: in instantiation of template class 'std::vector<std::locale::facet *, std::__sso_allocator<std::locale::facet *, 30>>' requested here
vector<facet*, __sso_allocator<facet*, N> > facets_;
^
/home/aaron/aaronmondal/llvm-project/build/include/c++/v1/__type_traits/aligned_storage.h:86:8: note: 'aligned_storage<240>' has been explicitly marked deprecated here
struct _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_TEMPLATE_VIS aligned_storage
^
/home/aaron/aaronmondal/llvm-project/build/include/c++/v1/__config:814:39: note: expanded from macro '_LIBCPP_DEPRECATED_IN_CXX23'
# define _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_DEPRECATED
^
/home/aaron/aaronmondal/llvm-project/build/include/c++/v1/__config:775:49: note: expanded from macro '_LIBCPP_DEPRECATED'
# define _LIBCPP_DEPRECATED __attribute__((__deprecated__))
^