(* $Id$ *)
+module C = NCic
+module Ref = NReference
+
exception CircularDependency of string Lazy.t;;
exception ObjectNotFound of string Lazy.t;;
-exception BadDependency of string Lazy.t;;
+exception BadDependency of string Lazy.t * exn;;
+exception BadConstraint of string Lazy.t;;
+exception AlreadyDefined of string Lazy.t;;
-let type0 = [false, NUri.uri_of_string ("cic:/matita/pts/Type.univ")]
+let cache = NUri.UriHash.create 313;;
+let history = ref [];;
+let frozen_list = ref [];;
-let u_eq (a1,a2) (b1,b2) = a1=b1 && NUri.eq a2 b2
+let get_obj = ref (fun _ -> assert false);;
+let set_get_obj f = get_obj := f;;
-let u_lt a b =
- match a,b with
- | (false,a2), (true,b2) -> NUri.eq a2 b2
- | _ -> false
+let type0 = []
+
+let max l1 l2 =
+ HExtlib.list_uniq ~eq:(fun (b1,u1) (b2,u2) -> b1=b2 && NUri.eq u1 u2)
+ (List.sort (fun (b1,u1) (b2,u2) ->
+ let res = compare b1 b2 in if res = 0 then NUri.compare u1 u2 else res)
+ (l1 @ l2))
+
+let le_constraints = ref [] (* strict,a,b *)
+
+let rec le_path_uri avoid strict a b =
+ (not strict && NUri.eq a b) ||
+ List.exists
+ (fun (strict',x,y) ->
+ NUri.eq y b && not (List.exists (NUri.eq x) avoid) &&
+ le_path_uri (x::avoid) (strict && not strict') a x
+ ) !le_constraints
;;
-
-let leq_constraints = ref []
-let rec path a b =
- List.exists (fun (x,y) -> u_eq y b && (u_eq a x || u_lt a x || path a x))
- !leq_constraints
+let leq_path a b = le_path_uri [b] (fst a) (snd a) b;;
let universe_leq a b =
match a, b with
- | a,[b] -> List.for_all (fun a -> path a b) a
- | _ -> assert false
+ | a,[(false,b)] -> List.for_all (fun a -> leq_path a b) a
+ | _,_ ->
+ raise (BadConstraint
+ (lazy "trying to check if a universe is less or equal than an inferred universe"))
-let universe_eq a b = universe_leq b a || universe_leq a b
+let universe_eq a b =
+ match a,b with
+ | [(false,_)], [(false,_)] -> universe_leq b a && universe_leq a b
+ | _, [(false,_)]
+ | [(false,_)],_ -> false
+ | _ ->
+ raise (BadConstraint
+ (lazy "trying to check if two inferred universes are equal"))
+;;
-let add_lt_constraint a b =
- match a,b with
- | [false,a2 as a],[false,_ as b] ->
- if path b a then (raise (Failure "universe inconsistency"));
- leq_constraints := ((true,a2),b) :: !leq_constraints
+let pp_constraint b x y =
+ NUri.name_of_uri x ^ (if b then " < " else " <= ") ^ NUri.name_of_uri y
+;;
+
+let pp_constraints () =
+ String.concat "\n" (List.map (fun (b,x,y) -> pp_constraint b x y) !le_constraints)
+;;
+
+let universes = ref [];;
+
+let get_universes () = List.map (fun x -> [false,x]) !universes;;
+
+let is_declared u =
+ match u with
+ [false,x] -> List.exists (fun y -> NUri.eq x y) !universes
| _ -> assert false
;;
-let add_leq_constraint a b =
+let add_constraint strict a b =
match a,b with
- | [false,_ as a],[false,b2 as b] ->
- if path (true,b2) a then (raise (Failure "universe inconsistency"));
- leq_constraints := (a,b) :: !leq_constraints
- | _ -> assert false
+ | [false,a2],[false,b2] ->
+ if not (le_path_uri [] strict a2 b2) then (
+ if le_path_uri [] (not strict) b2 a2 then
+ (raise(BadConstraint(lazy("universe inconsistency adding "^pp_constraint strict a2 b2
+ ^ " to:\n" ^ pp_constraints ()))));
+ universes := a2 :: b2 ::
+ List.filter (fun x -> not (NUri.eq x a2 || NUri.eq x b2)) !universes;
+ le_constraints := (strict,a2,b2) :: !le_constraints);
+ history := (`Constr (strict,a,b))::!history;
+ | _ -> raise (BadConstraint
+ (lazy "trying to add a constraint on an inferred universe"))
+;;
+
+let sup l =
+ match l with
+ | [false,_] -> Some l
+ | l ->
+ let bigger_than acc (s1,n1) = List.filter (le_path_uri [] s1 n1) acc in
+ let solutions = List.fold_left bigger_than !universes l in
+ let rec aux = function
+ | [] -> None
+ | u :: tl ->
+ if List.exists (fun x -> le_path_uri [] true x u) solutions then aux tl
+ else Some [false,u]
+ in
+ aux solutions
;;
end
;;
-let cache = NUri.UriHash.create 313;;
-let frozen_list = ref [];;
+let invalidate_item item =
+ let item_eq a b =
+ match a, b with
+ | `Obj (u1,_), `Obj (u2,_) -> NUri.eq u1 u2
+ | `Constr _, `Constr _ -> a=b (* MAKE EFFICIENT *)
+ | _ -> false
+ in
+ let rec aux to_be_deleted =
+ function
+ [] -> assert false
+ | item'::tl when item_eq item item' -> item'::to_be_deleted,tl
+ | item'::tl -> aux (item'::to_be_deleted) tl
+ in
+ let to_be_deleted,h = aux [] !history in
+ history := h;
+ List.iter
+ (function
+ | `Obj (uri,_) -> NUri.UriHash.remove cache uri
+ | `Constr (strict,[_,u1],[_,u2]) as c ->
+ let w = strict,u1,u2 in
+ if not(List.mem c !history) then
+ le_constraints := List.filter ((<>) w) !le_constraints;
+ | `Constr _ -> assert false
+ ) to_be_deleted
+;;
exception Propagate of NUri.uri * exn;;
+let to_exn f x =
+ match f x with
+ `WellTyped o -> o
+ | `Exn e -> raise e
+;;
+
+let check_and_add_obj ((u,_,_,_,_) as obj) =
+ let saved_frozen_list = !frozen_list in
+ try
+ frozen_list := (u,obj)::saved_frozen_list;
+ !typecheck_obj obj;
+ frozen_list := saved_frozen_list;
+ let obj' = `WellTyped obj in
+ NUri.UriHash.add cache u obj';
+ history := (`Obj (u,obj))::!history;
+ obj'
+ with
+ Sys.Break as e ->
+ frozen_list := saved_frozen_list;
+ raise e
+ | Propagate (u',old_exn) as e' ->
+ frozen_list := saved_frozen_list;
+ let exn = `Exn (BadDependency (lazy (NUri.string_of_uri u ^
+ " depends (recursively) on " ^ NUri.string_of_uri u' ^
+ " which is not well-typed"),
+ match old_exn with BadDependency (_,e) -> e | _ -> old_exn)) in
+ NUri.UriHash.add cache u exn;
+ history := (`Obj (u,obj))::!history;
+ if saved_frozen_list = [] then
+ exn
+ else
+ raise e'
+ | e ->
+ frozen_list := saved_frozen_list;
+ let exn = `Exn e in
+ NUri.UriHash.add cache u exn;
+ history := (`Obj (u,obj))::!history;
+ if saved_frozen_list = [] then
+ exn
+ else
+ raise (Propagate (u,e))
+;;
+
let get_checked_obj u =
if List.exists (fun (k,_) -> NUri.eq u k) !frozen_list
then
raise (CircularDependency (lazy (NUri.string_of_uri u)))
else
- let obj =
- try NUri.UriHash.find cache u
- with
- Not_found ->
- let saved_frozen_list = !frozen_list in
- try
- let obj =
- try NCicLibrary.get_obj u
- with
- NCicLibrary.ObjectNotFound m -> raise (ObjectNotFound m)
- in
- frozen_list := (u,obj)::saved_frozen_list;
- !typecheck_obj obj;
- frozen_list := saved_frozen_list;
- let obj = `WellTyped obj in
- NUri.UriHash.add cache u obj;
- obj
- with
- Sys.Break as e ->
- frozen_list := saved_frozen_list;
- raise e
- | Propagate (u',_) as e' ->
- frozen_list := saved_frozen_list;
- let exn = `Exn (BadDependency (lazy (NUri.string_of_uri u ^
- " depends (recursively) on " ^ NUri.string_of_uri u' ^
- " which is not well-typed"))) in
- NUri.UriHash.add cache u exn;
- if saved_frozen_list = [] then
- exn
- else
- raise e'
- | e ->
- frozen_list := saved_frozen_list;
- let exn = `Exn e in
- NUri.UriHash.add cache u exn;
- if saved_frozen_list = [] then
- exn
- else
- raise (Propagate (u,e))
- in
- match obj with
- `WellTyped o -> o
- | `Exn e -> raise e
+ try NUri.UriHash.find cache u
+ with Not_found -> check_and_add_obj (!get_obj u)
+;;
+
+let get_checked_obj u = to_exn get_checked_obj u;;
+
+let check_and_add_obj ((u,_,_,_,_) as obj) =
+ if NUri.UriHash.mem cache u then
+ raise (AlreadyDefined (lazy (NUri.string_of_uri u)))
+ else
+ ignore (to_exn check_and_add_obj obj)
;;
let get_checked_decl = function
- | NReference.Ref (uri, NReference.Decl) ->
+ | Ref.Ref (uri, Ref.Decl) ->
(match get_checked_obj uri with
- | _,height,_,_, NCic.Constant (rlv,name,None,ty,att) ->
+ | _,height,_,_, C.Constant (rlv,name,None,ty,att) ->
rlv,name,ty,att,height
- | _,_,_,_, NCic.Constant (_,_,Some _,_,_) ->
+ | _,_,_,_, C.Constant (_,_,Some _,_,_) ->
prerr_endline "get_checked_decl on a definition"; assert false
| _ -> prerr_endline "get_checked_decl on a non decl 2"; assert false)
| _ -> prerr_endline "get_checked_decl on a non decl"; assert false
;;
let get_checked_def = function
- | NReference.Ref (uri, NReference.Def _) ->
+ | Ref.Ref (uri, Ref.Def _) ->
(match get_checked_obj uri with
- | _,height,_,_, NCic.Constant (rlv,name,Some bo,ty,att) ->
+ | _,height,_,_, C.Constant (rlv,name,Some bo,ty,att) ->
rlv,name,bo,ty,att,height
- | _,_,_,_, NCic.Constant (_,_,None,_,_) ->
+ | _,_,_,_, C.Constant (_,_,None,_,_) ->
prerr_endline "get_checked_def on an axiom"; assert false
| _ -> prerr_endline "get_checked_def on a non def 2"; assert false)
| _ -> prerr_endline "get_checked_def on a non def"; assert false
;;
let get_checked_indtys = function
- | NReference.Ref (uri, (NReference.Ind (_,n)|NReference.Con (n,_))) ->
+ | Ref.Ref (uri, (Ref.Ind (_,n,_)|Ref.Con (n,_,_))) ->
(match get_checked_obj uri with
- | _,_,_,_, NCic.Inductive (inductive,leftno,tys,att) ->
+ | _,_,_,_, C.Inductive (inductive,leftno,tys,att) ->
inductive,leftno,tys,att,n
| _ -> prerr_endline "get_checked_indtys on a non ind 2"; assert false)
| _ -> prerr_endline "get_checked_indtys on a non ind"; assert false
;;
let get_checked_fixes_or_cofixes = function
- | NReference.Ref (uri, (NReference.Fix (fixno,_,_)|NReference.CoFix fixno))->
+ | Ref.Ref (uri, (Ref.Fix _|Ref.CoFix _))->
(match get_checked_obj uri with
- | _,height,_,_, NCic.Fixpoint (_,funcs,att) ->
+ | _,height,_,_, C.Fixpoint (_,funcs,att) ->
funcs, att, height
| _ ->prerr_endline "get_checked_(co)fix on a non (co)fix 2";assert false)
- | r -> prerr_endline ("get_checked_(co)fix on " ^ NReference.string_of_reference r); assert false
-;;
-
-let get_indty_leftno = function
- | NReference.Ref (uri, NReference.Ind _)
- | NReference.Ref (uri, NReference.Con _) ->
- (match get_checked_obj uri with
- | _,_,_,_, NCic.Inductive (_,left,_,_) -> left
- | _ ->prerr_endline "get_indty_leftno called on a non ind 2";assert false)
- | _ -> prerr_endline "get_indty_leftno called on a non indty";assert false
+ | _ -> prerr_endline "get_checked_(co)fix on a non (co)fix"; assert false
;;
-let get_relevance (NReference.Ref (_, infos) as r) =
+let get_relevance (Ref.Ref (_, infos) as r) =
match infos with
- NReference.Def _ -> let res,_,_,_,_,_ = get_checked_def r in res
- | NReference.Decl -> let res,_,_,_,_ = get_checked_decl r in res
- | NReference.Ind _ ->
+ Ref.Def _ -> let res,_,_,_,_,_ = get_checked_def r in res
+ | Ref.Decl -> let res,_,_,_,_ = get_checked_decl r in res
+ | Ref.Ind _ ->
let _,_,tl,_,n = get_checked_indtys r in
let res,_,_,_ = List.nth tl n in
res
- | NReference.Con (_,i) ->
+ | Ref.Con (_,i,_) ->
let _,_,tl,_,n = get_checked_indtys r in
let _,_,_,cl = List.nth tl n in
let res,_,_ = List.nth cl (i - 1) in
res
- | NReference.Fix (fixno,_,_)
- | NReference.CoFix fixno ->
+ | Ref.Fix (fixno,_,_)
+ | Ref.CoFix fixno ->
let fl,_,_ = get_checked_fixes_or_cofixes r in
let res,_,_,_,_ = List.nth fl fixno in
res
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