(* $Id$ *)
-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 obj_attrs = [`Class `Coercion; `Generated]
-
-exception UnableToCompose
-
-(* generate_composite_closure (c2 (c1 s)) in the universe graph univ *)
-let generate_composite_closure rt c1 c2 univ =
- let module RT = RefinementTool in
- let c1_ty,univ = CicTypeChecker.type_of_aux' [] [] c1 univ in
- let c2_ty,univ = CicTypeChecker.type_of_aux' [] [] c2 univ in
- let rec mk_implicits n =
- match n with
- | 0 -> []
- | _ -> (Cic.Implicit None) :: mk_implicits (n-1)
- in
- let rec mk_lambda_spline c = function
- | 0 -> c
- | n ->
- Cic.Lambda
- (Cic.Name ("A" ^ string_of_int (n-1)),
- (Cic.Implicit None),
- mk_lambda_spline c (n-1))
- in
- let rec count_saturations_needed n = function
- | Cic.Prod (_,src, ((Cic.Prod _) as t)) -> count_saturations_needed (n+1) t
- | _ -> n
- in
- let compose c1 nc1 c2 nc2 =
- Cic.Lambda
- (Cic.Name "x",
- (Cic.Implicit None),
- Cic.Appl ( c2 :: mk_implicits nc2 @
- [ Cic.Appl ( c1 :: mk_implicits nc1 @ [Cic.Rel 1]) ]))
- in
- let order_metasenv metasenv =
- List.sort
- (fun (_,ctx1,_) (_,ctx2,_) -> List.length ctx1 - List.length ctx2)
- metasenv
- in
- let rec create_subst_from_metas_to_rels n = function
- | [] -> []
- | (metano, ctx, ty)::tl ->
- (metano,(ctx,Cic.Rel (n+1),ty)) ::
- create_subst_from_metas_to_rels (n-1) tl
- in
- let split_metasenv metasenv n =
- List.partition (fun (_,ctx,_) -> List.length ctx > n) metasenv
- in
- let purge_unused_lambdas metasenv t =
- let rec aux = function
- | Cic.Lambda (_, Cic.Meta (i,_), t) when
- List.exists (fun (j,_,_) -> j = i) metasenv ->
- aux (CicSubstitution.subst (Cic.Rel ~-100) t)
- | Cic.Lambda (name, s, t) ->
- Cic.Lambda (name, s, aux t)
- | t -> t
- in
- aux t
- in
- debug_print (lazy ("\nCOMPOSING"));
- debug_print (lazy (" c1= "^CicPp.ppterm c1 ^" : "^ CicPp.ppterm c1_ty));
- debug_print (lazy (" c2= "^CicPp.ppterm c2 ^" : "^ CicPp.ppterm c2_ty));
- let saturations_for_c1 = count_saturations_needed 0 c1_ty in
- let saturations_for_c2 = count_saturations_needed 0 c2_ty in
- let c = compose c1 saturations_for_c1 c2 saturations_for_c2 in
- let spline_len = saturations_for_c1 + saturations_for_c2 in
- let c = mk_lambda_spline c spline_len in
- (* debug_print (lazy ("COMPOSTA: " ^ CicPp.ppterm c)); *)
- let c, univ =
- match rt.RT.type_of_aux' [] [] c univ with
- | RT.Success (term, ty, metasenv, ugraph) ->
- debug_print(lazy("COMPOSED REFINED: "^CicPp.ppterm term));
- let metasenv = order_metasenv metasenv in
- debug_print(lazy("ORDERED MENV: "^rt.RT.ppmetasenv [] metasenv));
- let body_metasenv, lambdas_metasenv =
- split_metasenv metasenv spline_len
- in
- debug_print(lazy("B_MENV: "^rt.RT.ppmetasenv [] body_metasenv));
- debug_print(lazy("L_MENV: "^rt.RT.ppmetasenv [] lambdas_metasenv));
- let subst = create_subst_from_metas_to_rels spline_len body_metasenv in
- debug_print (lazy("SUBST: "^rt.RT.ppsubst subst));
- let term = rt.RT.apply_subst subst term in
- debug_print (lazy ("COMPOSED SUBSTITUTED: " ^ CicPp.ppterm term));
- (match rt.RT.type_of_aux' metasenv [] term ugraph with
- | RT.Success (term, ty, metasenv, ugraph) ->
- let body_metasenv, lambdas_metasenv =
- split_metasenv metasenv spline_len
- in
- let term = purge_unused_lambdas lambdas_metasenv term in
- debug_print (lazy ("COMPOSED: " ^ CicPp.ppterm term));
- term, ugraph
- | RT.Exception s -> debug_print s; raise UnableToCompose)
- | RT.Exception s -> debug_print s; raise UnableToCompose
- in
- let c_ty,univ =
- try
- CicTypeChecker.type_of_aux' [] [] c univ
- with CicTypeChecker.TypeCheckerFailure s ->
- debug_print (lazy (Printf.sprintf "Generated composite coercion:\n%s\n%s"
- (CicPp.ppterm c) (Lazy.force s)));
- raise UnableToCompose
- 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_ref = ref
+ (fun _ _ _ _ _ -> [] :
+ RefinementTool.kit ->
+ CoercDb.coerc_carr -> CoercDb.coerc_carr -> UriManager.uri ->
+ string (* baseuri *) ->
+ (CoercDb.coerc_carr * CoercDb.coerc_carr * UriManager.uri * Cic.obj) list)
;;
-(* 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
+let set_close_coercion_graph f = close_coercion_graph_ref := f;;
-(* given a new coercion uri from src to tgt returns
- * a list of (new coercion uri, coercion obj, universe graph)
- *)
-let close_coercion_graph rt 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 =
- HExtlib.filter_map (
- fun (src, l , tgt) ->
- try
- (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 rt 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
- Some ((src,tgt,c_uri,named_obj)))
- with UnableToCompose -> None
- ) todo_list
- in
- new_coercions
+let close_coercion_graph r c1 c2 u s =
+ !close_coercion_graph_ref r c1 c2 u s
;;
-
projects / helm.git / blobdiff