[PATCH] D23146: [ADT] Migrate DepthFirstIterator to use NodeRef

[David Blaikie via llvm-commits]

dblaikie accepted this revision.
dblaikie added a comment.
This revision is now accepted and ready to land.

Looks good, thanks! (I realize we've got to wait to finalize the Optional stuff first, of course)


https://reviews.llvm.org/D23146