Add arguments to main.ml
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30
lam.ml
30
lam.ml
@ -8,6 +8,7 @@ type lam =
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| Var of id
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| Exf of lam * Types.ty
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(** alpha renaming in a deterministic way *)
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let alpha_convert (e : lam) : lam =
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let cpt_var = ref 0 in (* id cpt for variables *)
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@ -15,26 +16,23 @@ let alpha_convert (e : lam) : lam =
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let v = "__"^(string_of_int !cpt)
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in incr cpt; v
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in let renamed = ref []
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in let new_ren_var (cpt : int ref) (var : id) : id = (* checks if a variable already has a new id, or generates one *)
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let var' = generator cpt in (
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renamed := (var, var')::!renamed;
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var'
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)
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in let get_ren_var (var : id) : id = (* returns var if not found *)
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match List.assoc_opt var !renamed with
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in let get_ren_var (var : id) (g : (id * id) list): id = (* returns var if not found *)
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match List.assoc_opt var g with
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| Some var' -> var'
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| None -> var
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in let rec alpha_aux (e : lam) : lam = match e with (* actual renaming *)
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Fun ((v, t), e) -> Fun ((new_ren_var cpt_var v, t), alpha_aux e)
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| App (e1, e2) -> App (alpha_aux e1, alpha_aux e2)
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| Var v -> Var (get_ren_var v)
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| Exf (e, t) -> Exf (alpha_aux e, t)
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in alpha_aux e
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in let rec alpha_aux (e : lam) (g : (id * id) list): lam = match e with (* actual renaming *)
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Fun ((v, t), e) ->
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let v' = generator cpt_var in
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Fun ((v', t), alpha_aux e ((v, v')::g))
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| App (e1, e2) -> App (alpha_aux e1 g, alpha_aux e2 g)
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| Var v -> Var (get_ren_var v g)
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| Exf (e, t) -> Exf (alpha_aux e g, t)
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in alpha_aux e []
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(** alpha equivalence *)
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let (=~) (e1 : lam) (e2 : lam) : bool =
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alpha_convert e1 = alpha_convert e2
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(** beta-reduction *)
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57
main.ml
57
main.ml
@ -1,6 +1,11 @@
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open Affichage
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open Typing
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type entry =
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Simple of Lam.lam
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| AlphaEquiv of Lam.lam * Lam.lam
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let interpret e =
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begin
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print_expr e;
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@ -9,12 +14,52 @@ let interpret e =
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print_newline()
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end
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let lexbuf = Lexing.from_channel stdin
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let nom_fichier = ref ""
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let equiv_fichier = ref ""
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let parse () = Parser.main Lexer.token lexbuf
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let parse_channel c =
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let lexbuf = Lexing.from_channel c in
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Parser.main Lexer.token lexbuf
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let calc () =
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let result = parse () in
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interpret result; flush stdout
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let recupere_entree () =
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let optlist = [
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("-alphaequiv", Arg.Set_string equiv_fichier, "Vérifie l'alpha équivalence avec un autre fichier");
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] in
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let usage = "Bienvenue à bord." in (* message d'accueil, option -help *)
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Arg.parse (* ci-dessous les 3 arguments de Arg.parse : *)
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optlist (* la liste des options definie plus haut *)
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(fun s -> nom_fichier := s) (* la fonction a declencher lorsqu'on recupere un string qui n'est pas une option : ici c'est le nom du fichier, et on stocke cette information dans la reference nom_fichier *)
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usage; (* le message d'accueil *)
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let lam1 = try
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let where_from = match !nom_fichier with
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| "" -> stdin
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| s -> open_in s in
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parse_channel where_from
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with e -> (Printf.printf "problème de saisie\n"; raise e)
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in if !equiv_fichier <> "" then
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let lam2 = try parse_channel (open_in !equiv_fichier)
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with e -> (Printf.printf "problème de saisie\n"; raise e)
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in AlphaEquiv (lam1, lam2)
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else Simple lam1
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(* la fonction principale *)
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let run () =
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try
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match recupere_entree () with
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Simple l -> let _ = interpret l in ()
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| AlphaEquiv (l1, l2) -> begin
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if ((Lam.(=~)) l1 l2) then
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print_string "true\n"
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else
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print_string "false\n"
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end;
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flush stdout
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with e -> raise e
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let _ = run ()
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let _ = calc()
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1
tests/alpha_equiv/basic.ml
Normal file
1
tests/alpha_equiv/basic.ml
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@ -0,0 +1 @@
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fun (x:A) => x y z
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1
tests/alpha_equiv/basic_alpha.ml
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1
tests/alpha_equiv/basic_alpha.ml
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@ -0,0 +1 @@
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fun (y:A) => y y z
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1
tests/alpha_equiv/basic_alpha2.ml
Normal file
1
tests/alpha_equiv/basic_alpha2.ml
Normal file
@ -0,0 +1 @@
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fun (a:A) => a y z
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