Should 'obj?.#prop' be allowed?

[strager]

From my understanding of the current proposal, obj?.#prop is not allowed. The OptionalChain syntax rule allows ?. followed by IdentifierName, but does not allow ?. followed by PrivateIdentifier. Is this intentional or an oversight?

[ljharb]

I’d check tc39/ecma262#1668. Since optional chaining landed before this proposal, I’d indeed expect it to be supported. If not, that PR is the place to comment.

[JLHwung]

obj?.#prop is allowed: https://tc39.es/proposal-class-fields/#prod-OptionalChain

[caiolima]

For history, this was also discussed on plenary last year. tc39/proposal-class-fields#301 documents it.