module OperatorLift:sig..end
ustring type.val (!!) : string -> BatPathGen.PathType.ustringustring. May raise some exceptions depending on actual strings implementation.
You might want to open Path.OperatorLift to improve readability of path construction using string literals. Example:
Path.root/:!!"foo"/:!!"bar" = Path.root/:(S.lift "foo")/:(S.lift "bar") (where S.lift converts to ustring type)