Using [[may_alias]] in C23/C++23 on a union works in neither post-"union" position, or at the end of the definition

[Jonathan Wakely]

On Tue, 6 Dec 2022, 18:36 Gavin Ray via Gcc, <gcc@gcc.gnu.org> wrote:

> Oh, D'oh! Thanks Joseph, apologies for the needless email on the list then.
>
> One final question if I could -- does that mean that in order to support
> "may-alias" with the bracket syntax on both Clang and GCC, it would
> require:
>
>  union [[gnu::may_alias]] [[clang::may_alias]] foo {};
>



Probably not. Clang accepts the gnu:: namespace for attributes that
originated with GCC.