Add style script rule to check for uses of std::optional<>.
Created attachment 357814 [details] Patch
Created attachment 357818 [details] Patch
Created attachment 357838 [details] Patch
Comment on attachment 357838 [details] Patch Clearing flags on attachment: 357838 Committed r239476: <https://trac.webkit.org/changeset/239476>
All reviewed patches have been landed. Closing bug.
<rdar://problem/46887645>