(* $Id$ *)
-let debug = false
-let debug_print s = if debug then prerr_endline (Lazy.force s) else ()
-
-(* given the new coercion uri from src to tgt returns the list
- * of new coercions to create. hte list elements are
- * (source, list of coercions to follow, target)
- *)
-let get_closure_coercions src tgt uri coercions =
- let eq_carr s t =
- try
- CoercDb.eq_carr s t
- with
- | CoercDb.EqCarrNotImplemented _ | CoercDb.EqCarrOnNonMetaClosed -> false
- in
- match src,tgt with
- | CoercDb.Uri _, CoercDb.Uri _ ->
- let c_from_tgt =
- List.filter (fun (f,_,_) -> eq_carr f tgt) coercions
- in
- let c_to_src =
- List.filter (fun (_,t,_) -> eq_carr t src) coercions
- in
- (List.map (fun (_,t,u) -> src,[uri; u],t) c_from_tgt) @
- (List.map (fun (s,_,u) -> s,[u; uri],tgt) c_to_src) @
- (List.fold_left (
- fun l (s,_,u1) ->
- ((List.map (fun (_,t,u2) ->
- (s,[u1;uri;u2],t)
- )c_from_tgt)@l) )
- [] c_to_src)
- | _ -> [] (* do not close in case source or target is not an indty ?? *)
+let close_coercion_graph_ref = ref
+ (fun _ _ _ _ _ -> [] :
+ CoercDb.coerc_carr -> CoercDb.coerc_carr -> UriManager.uri -> int ->
+ string (* baseuri *) ->
+ (CoercDb.coerc_carr * CoercDb.coerc_carr * UriManager.uri * int * Cic.obj * int) list)
;;
-let obj_attrs = [`Class `Coercion; `Generated]
+let set_close_coercion_graph f = close_coercion_graph_ref := f;;
-(* generate_composite_closure (c2 (c1 s)) in the universe graph univ *)
-let generate_composite_closure c1 c2 univ =
- let c1_ty,univ = CicTypeChecker.type_of_aux' [] [] c1 univ in
- let rec mk_rels n =
- match n with
- | 0 -> []
- | _ -> (Cic.Rel n) :: (mk_rels (n-1))
- in
- let rec compose k =
- function
- | Cic.Prod (name,src,tgt) ->
- let name =
- match name with
- | Cic.Anonymous -> Cic.Name "x"
- | _ -> name
- in
- Cic.Lambda (name,src,compose (k+1) tgt)
- | Cic.Appl (he::tl) ->
- Cic.Appl (c2 :: tl @ [Cic.Appl (c1 :: (mk_rels k)) ])
- | _ -> Cic.Appl (c2 :: [Cic.Appl (c1 :: (mk_rels k)) ])
- in
- let c = compose 0 c1_ty in
- let c_ty,univ =
- try
- CicTypeChecker.type_of_aux' [] [] c univ
- with CicTypeChecker.TypeCheckerFailure s as exn ->
- debug_print (lazy (Printf.sprintf "Generated composite coercion:\n%s\n%s"
- (CicPp.ppterm c) (Lazy.force s)));
- raise exn
- in
- let cleaned_ty =
- FreshNamesGenerator.clean_dummy_dependent_types c_ty
- in
- let obj = Cic.Constant ("xxxx",Some c,cleaned_ty,[],obj_attrs) in
- obj,univ
+let close_coercion_graph c1 c2 u sat s =
+ !close_coercion_graph_ref c1 c2 u sat s
;;
-
-(* removes from l the coercions that are in !coercions *)
-let filter_duplicates l coercions =
- List.filter (
- fun (src,_,tgt) ->
- not (List.exists (fun (s,t,u) ->
- CoercDb.eq_carr s src &&
- CoercDb.eq_carr t tgt)
- coercions))
- l
-
-(* given a new coercion uri from src to tgt returns
- * a list of (new coercion uri, coercion obj, universe graph)
- *)
-let close_coercion_graph src tgt uri =
- (* check if the coercion already exists *)
- let coercions = CoercDb.to_list () in
- let todo_list = get_closure_coercions src tgt uri coercions in
- let todo_list = filter_duplicates todo_list coercions in
- let new_coercions =
- List.map (
- fun (src, l , tgt) ->
- match l with
- | [] -> assert false
- | he :: tl ->
- let first_step =
- Cic.Constant ("",
- Some (CoercDb.term_of_carr (CoercDb.Uri he)),
- Cic.Sort Cic.Prop, [], obj_attrs)
- in
- let o,_ =
- List.fold_left (fun (o,univ) coer ->
- match o with
- | Cic.Constant (_,Some c,_,[],_) ->
- generate_composite_closure c (CoercDb.term_of_carr (CoercDb.Uri
- coer)) univ
- | _ -> assert false
- ) (first_step, CicUniv.empty_ugraph) tl
- in
- let name_src = CoercDb.name_of_carr src in
- let name_tgt = CoercDb.name_of_carr tgt in
- let name = name_tgt ^ "_of_" ^ name_src in
- let buri = UriManager.buri_of_uri uri in
- let c_uri =
- UriManager.uri_of_string (buri ^ "/" ^ name ^ ".con")
- in
- let named_obj =
- match o with
- | Cic.Constant (_,bo,ty,vl,attrs) ->
- Cic.Constant (name,bo,ty,vl,attrs)
- | _ -> assert false
- in
- ((src,tgt,c_uri,named_obj))
- ) todo_list
- in
- new_coercions
-;;
-
projects / helm.git / blobdiff