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|
(* TEST
expect;
*)
type arg = AString of string | ARest of string | ARest_all of string list
let push acc s =
acc := s :: !acc
let f_str acc s = push acc (AString s)
let f_rest acc s = push acc (ARest s)
let f_rest_all acc ss = push acc (ARest_all ss)
let test args =
let acc = ref [] in
Arg.parse_argv ~current:(ref 0) args Arg.[
"-str", String (f_str acc), "String (1)";
"-rest", Rest (f_rest acc), "Rest (*)";
"-rest-all", Rest_all (f_rest_all acc), "Rest_all (*)";
] failwith "";
List.rev !acc
[%%expect{|
type arg = AString of string | ARest of string | ARest_all of string list
val push : 'a list ref -> 'a -> unit = <fun>
val f_str : arg list ref -> string -> unit = <fun>
val f_rest : arg list ref -> string -> unit = <fun>
val f_rest_all : arg list ref -> string list -> unit = <fun>
val test : string array -> arg list = <fun>
|}];;
let _ = test [|
"prog";
"-str"; "foo";
"-str"; "bar";
"-rest";
"foobar";
"-str"; "foobaz"
|];;
[%%expect{|
- : arg list =
[AString "foo"; AString "bar"; ARest "foobar"; ARest "-str"; ARest "foobaz"]
|}];;
let _ = test [|
"prog";
"-str"; "foo";
"-str"; "bar";
"-rest-all";
"foobar";
"-str"; "foobaz"
|];;
[%%expect{|
- : arg list =
[AString "foo"; AString "bar"; ARest_all ["foobar"; "-str"; "foobaz"]]
|}];;
(* Rest does nothing when there are no following arguments *)
let _ = test [|
"prog";
"-str"; "foo";
"-str"; "bar";
"-rest";
|];;
[%%expect{|
- : arg list = [AString "foo"; AString "bar"]
|}];;
(* Rest_all lets us detect that there were no rest arguments *)
let _ = test [|
"prog";
"-str"; "foo";
"-str"; "bar";
"-rest-all";
|];;
[%%expect{|
- : arg list = [AString "foo"; AString "bar"; ARest_all []]
|}];;
|
