import Lean
def main : IO Unit := pure () /- -- TODO: remove after stage0 update

open Lean

def main : IO UInt32 := do
let e := mkAppN (mkConst `f) #[mkConst `a, mkConst `b]
IO.println e
IO.println s!"hash: {e.hash}"
IO.println e.getAppArgs
pure 0
-/
