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(* TEST_BELOW*)
(* exercise push_defaults *)
let s = 42;;
let f ?(s="hello") = function x when (print_endline s; true) -> x;;
let () = f ();;
let f ?(y = assert false) (lazy e) = () in
try f (lazy (print_endline "hello")) with _ -> print_endline "failed";;
type empty = |;;
let f : empty -> int = function _ -> .;;
let f ?y : empty -> int = function _ -> .;;
let f ?(y=1) : empty -> int = function _ -> .;;
module type E = sig exception Ex end;;
let f ((module M) : (module E)) (M.Ex | _) = "42";;
print_endline (f (module struct exception Ex end) Exit);;
(* push_defaults should push past the module pattern *)
let f ?(x = assert false) ((module M) : (module E)) () = 1;;
(* so partial application of the module doesn't raise *)
let partial = f (module struct exception Ex end);;
(* TEST
*)
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