On Sat, 18 Mar 2023, 08:32 Raiki Tamura via Gcc, <gcc@gcc.gnu.org> wrote:

> Thank you everyone for your advice.
> Some kinds of names are restricted to unicode alphabetic/numeric in Rust.
>

Doesn't it use the same rules as C++, based on XID_Start and XID_Continue?
That should already be supported.