rose-filter assumes too much?

[gfredericks]

rose-filter assumes that if a node doesn't pass the predicate, none of its children will.

[reiddraper]

I've tried to fix this a couple of times, but it's non-obvious to me what to do to exclude a node from the tree. Do you just replace the node with all of it's children, and then work recursively?

[gfredericks]

Could you promote the first child to the root and concat its children to the rest of the children?

[reiddraper]

Moved to Jira.