Danny Tuppeny
026043d9ed
In the new interactive forms, some of the enums can be combined (eg. `FileExistence.New | FileExisting.Existing`). This adds a flag that produces some helper functions for `hasFlag()` and `combine()`. These helpers are not used outside of tests in this CL but will be used in a future CL (which I'm trying to avoid getting too big to simplify reviewing). Change-Id: I1b5f06f05d96781c4bc6a246a0a9309a786c1987 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/505320 Reviewed-by: Keerti Parthasarathy <keertip@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Commit-Queue: Keerti Parthasarathy <keertip@google.com>