Dumping case trees to Main.cases
Main.plus = [{arg:N}, {arg:N}]: (%case !{arg:N} [(%constcase 0 !{arg:N})] Just (%let {e:N} (-Integer [!{arg:N}, 1]) (+Integer [(Main.plus [!{e:N}, !{arg:N}]), 1])))
Main.main = [{ext:N}]: (Main.plus [1, 2])