4b3c3ba8b5
Fixing the actual bug : * static_exp should not be created without type after or during the typing pass.
108 lines
3 KiB
OCaml
108 lines
3 KiB
OCaml
(**************************************************************************)
|
|
(* *)
|
|
(* Heptagon *)
|
|
(* *)
|
|
(* Author : Marc Pouzet *)
|
|
(* Organization : Demons, LRI, University of Paris-Sud, Orsay *)
|
|
(* *)
|
|
(**************************************************************************)
|
|
|
|
open Names
|
|
open Idents
|
|
open Types
|
|
|
|
type ct =
|
|
| Ck of ck
|
|
| Cprod of ct list
|
|
|
|
and ck =
|
|
| Cbase
|
|
| Cvar of link ref
|
|
| Con of ck * constructor_name * var_ident
|
|
|
|
and link =
|
|
| Cindex of int
|
|
| Clink of ck
|
|
|
|
|
|
exception Unify
|
|
|
|
|
|
let index = ref 0
|
|
|
|
let gen_index () = (incr index; !index)
|
|
|
|
(** returns a new clock variable *)
|
|
let new_var () = Cvar { contents = Cindex (gen_index ()); }
|
|
|
|
(** returns the canonic (short) representant of a [ck]
|
|
and update it to this value. *)
|
|
let rec ck_repr ck = match ck with
|
|
| Cbase | Con _ | Cvar { contents = Cindex _ } -> ck
|
|
| Cvar (({ contents = Clink ck } as link)) ->
|
|
let ck = ck_repr ck in (link.contents <- Clink ck; ck)
|
|
|
|
|
|
(** verifies that index is fresh in ck. *)
|
|
let rec occur_check index ck =
|
|
let ck = ck_repr ck in
|
|
match ck with
|
|
| Cbase -> ()
|
|
| Cvar { contents = Cindex n } when index <> n -> ()
|
|
| Con (ck, _, _) -> occur_check index ck
|
|
| _ -> raise Unify
|
|
|
|
|
|
let rec unify t1 t2 =
|
|
if t1 == t2
|
|
then ()
|
|
else
|
|
(match (t1, t2) with
|
|
| (Ck ck1, Ck ck2) -> unify_ck ck1 ck2
|
|
| (Cprod ct_list1, Cprod ct_list2) ->
|
|
(try List.iter2 unify ct_list1 ct_list2 with | _ -> raise Unify)
|
|
| _ -> raise Unify)
|
|
|
|
and unify_ck ck1 ck2 =
|
|
let ck1 = ck_repr ck1 in
|
|
let ck2 = ck_repr ck2 in
|
|
if ck1 == ck2
|
|
then ()
|
|
else
|
|
(match (ck1, ck2) with
|
|
| (Cbase, Cbase) -> ()
|
|
| (Cvar { contents = Cindex n1 }, Cvar { contents = Cindex n2 }) when
|
|
n1 = n2 -> ()
|
|
| (Cvar (({ contents = Cindex n1 } as v)), _) ->
|
|
(occur_check n1 ck2; v.contents <- Clink ck2)
|
|
| (_, Cvar (({ contents = Cindex n2 } as v))) ->
|
|
(occur_check n2 ck1; v.contents <- Clink ck1)
|
|
| (Con (ck1, c1, n1), Con (ck2, c2, n2)) when (c1 = c2) & (n1 = n2) ->
|
|
unify_ck ck1 ck2
|
|
| _ -> raise Unify)
|
|
|
|
|
|
let rec unify t1 t2 =
|
|
match (t1, t2) with
|
|
| (Ck ck1, Ck ck2) -> unify_ck ck1 ck2
|
|
| (Cprod t1_list, Cprod t2_list) -> unify_list t1_list t2_list
|
|
| _ -> raise Unify
|
|
|
|
and unify_list t1_list t2_list =
|
|
try List.iter2 unify t1_list t2_list with | _ -> raise Unify
|
|
|
|
let rec skeleton ck = function
|
|
| Tprod ty_list -> Cprod (List.map (skeleton ck) ty_list)
|
|
| Tarray _ | Tid _ -> Ck ck
|
|
|
|
let rec const_skeleton ck se = match se.se_desc with
|
|
| Stuple se_list -> Cprod (List.map (const_skeleton ck) se_list)
|
|
| _ -> Ck ck
|
|
|
|
let ckofct = function | Ck ck -> ck_repr ck | Cprod ct_list -> Cbase
|
|
|
|
|
|
|
|
|
|
|