This is primarily to allow writing if (options & Option:A) instead of if (options.contains(Option:A)) It is consistent with other OptionSet operators.
Created attachment 339565 [details] patch
Comment on attachment 339565 [details] patch OK.
Comment on attachment 339565 [details] patch Clearing flags on attachment: 339565 Committed r231548: <https://trac.webkit.org/changeset/231548>
All reviewed patches have been landed. Closing bug.
<rdar://problem/40084845>