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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Undefined-values/OCaml/undefined-values.ocaml Normal file
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(* There is no undefined value in OCaml,
but if you really need this you can use the built-in "option" type.
It is defined like this: type 'a option = None | Some of 'a *)
let inc = function
Some n -> Some (n+1)
| None -> failwith "Undefined argument";;
inc (Some 0);;
(* - : value = Some 1 *)
inc None;;
(* Exception: Failure "Undefined argument". *)