[libc++] Undeprecate the std::allocator<void> specialization
While the std::allocator<void> specialization was deprecated by
https://wg21.link/p0174#2.2, the *use* of std::allocator<void> by users
was not. The intent was that std::allocator<void> could still be used
in C++17 and C++20, but starting with C++20 (with the removal of the
specialization), std::allocator<void> would use the primary template.
That intent was called out in wg21.link/p0619r4#3.9.
As a result of this patch, _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS
will also not control whether the explicit specialization is provided or
not. It shouldn't matter, since in C++20, one can simply use the primary
template.
Fixes http://llvm.org/PR50299
Differential Revision: https://reviews.llvm.org/D104323
NOKEYCHECK=True
GitOrigin-RevId: 87784cc6fb3453a17e0e7826b943a1d93cbfeccf
diff --git a/include/memory b/include/memory
index c748070..62dd992 100644
--- a/include/memory
+++ b/include/memory
@@ -99,7 +99,7 @@
};
template <>
-class allocator<void> // deprecated in C++17, removed in C++20
+class allocator<void> // removed in C++20
{
public:
typedef void* pointer;