From: Claudio Sacerdoti Coen Date: Tue, 4 Sep 2007 09:39:56 +0000 (+0000) Subject: 1. composition of coercions with saturations > 0 is now implemented X-Git-Tag: make_still_working~6079 X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=1f6aab137983a515b3ba4bb1d1efe0c9e22e889e;p=helm.git 1. composition of coercions with saturations > 0 is now implemented 2. as a side effect, there is no longer any difference between composition of coercions and the compose tactic TODO: composition of coercions having arity > 0 is not implemented yet --- diff --git a/helm/software/components/tactics/closeCoercionGraph.ml b/helm/software/components/tactics/closeCoercionGraph.ml index 0ab937ace..68e4e7cb2 100644 --- a/helm/software/components/tactics/closeCoercionGraph.ml +++ b/helm/software/components/tactics/closeCoercionGraph.ml @@ -29,13 +29,13 @@ 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 + * of new coercions to create. the list elements are * (source, list of coercions to follow, target) *) let get_closure_coercions src tgt uri coercions = - let eq_carr s t = + let eq_carr ?exact s t = try - CoercDb.eq_carr s t + CoercDb.eq_carr ?exact s t with | CoercDb.EqCarrNotImplemented _ | CoercDb.EqCarrOnNonMetaClosed -> false in @@ -53,11 +53,11 @@ let get_closure_coercions src tgt uri coercions = in (HExtlib.flatten_map (fun (_,t,ul) -> - if CoercDb.eq_carr ~exact:true src t then [] else + if eq_carr ~exact:true src t then [] else List.map (fun u -> src,[uri; u],t) ul) c_from_tgt) @ (HExtlib.flatten_map (fun (s,_,ul) -> - if CoercDb.eq_carr ~exact:true s tgt then [] else + if eq_carr ~exact:true s tgt then [] else List.map (fun u -> s,[u; uri],tgt) ul) c_to_src) @ (HExtlib.flatten_map (fun (s,_,u1l) -> @@ -65,7 +65,10 @@ let get_closure_coercions src tgt uri coercions = (fun (_,t,u2l) -> HExtlib.flatten_map (fun u1 -> - if CoercDb.eq_carr ~exact:true s t then [] else + if eq_carr ~exact:true s t + || eq_carr ~exact:true s tgt + || eq_carr ~exact:true src t + then [] else List.map (fun u2 -> (s,[u1;uri;u2],t)) u2l) @@ -81,12 +84,7 @@ exception UnableToCompose (* generate_composite (c2 (c1 s)) in the universe graph univ * both living in the same context and metasenv *) -let generate_composite' (c1,sat1) (c2,sat2) context metasenv univ arity - last_lam_with_inn_arg -= -assert (sat1 = 0); -assert (sat2 = 0); -let saturationsres = 0 in +let generate_composite' (c1,sat1) (c2,sat2) context metasenv univ arity = let original_metasenv = metasenv in let c1_ty,univ = CicTypeChecker.type_of_aux' metasenv context c1 univ in let c2_ty,univ = CicTypeChecker.type_of_aux' metasenv context c2 univ in @@ -101,10 +99,9 @@ let saturationsres = 0 in (Cic.Implicit None), mk_lambda_spine (CicSubstitution.lift 1 c) namer (n-1)) in - let count_saturations_needed t arity = + let count_pis t arity = let rec aux acc n = function - | Cic.Prod (name,src, ((Cic.Prod _) as t)) -> - aux (acc@[name]) (n+1) t + | Cic.Prod (name,src,tgt) -> aux (acc@[name]) (n+1) tgt | _ -> n,acc in let len,names = aux [] 0 t in @@ -114,36 +111,18 @@ let saturationsres = 0 in names in let compose c1 nc1 c2 nc2 = - Cic.Lambda - (Cic.Name "x", (Cic.Implicit (Some `Type)), - (Cic.Appl ( CicSubstitution.lift 1 c2 :: mk_implicits nc2 @ - [ Cic.Appl ( CicSubstitution.lift 1 c1 :: mk_implicits nc1 @ - [if last_lam_with_inn_arg then Cic.Rel 1 else Cic.Implicit None]) - ]))) + Cic.Appl (CicSubstitution.lift 1 c2 :: mk_implicits (nc2 - sat2 - 1) @ + Cic.Appl (CicSubstitution.lift 1 c1 :: mk_implicits nc1 ) :: + mk_implicits sat2) in -(* - let order_metasenv metasenv = - let module OT = struct type t = int let compare = Pervasives.compare end in - let module S = HTopoSort.Make (OT) in - let dep i = - let _,_,ty = List.find (fun (j,_,_) -> j=i) metasenv in - let metas = List.map fst (CicUtil.metas_of_term ty) in - HExtlib.list_uniq (List.sort Pervasives.compare metas) - in - let om = - S.topological_sort (List.map (fun (i,_,_) -> i) metasenv) dep - in - List.map (fun i -> List.find (fun (j,_,_) -> i=j) metasenv) om - in -*) let rec create_subst_from_metas_to_rels n = function | [] -> [] | (metano, ctx, ty)::tl -> - (metano,(ctx,Cic.Rel (n+1),ty)) :: + (metano,(ctx,Cic.Rel n,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 + List.partition (fun (_,ctx,_) -> List.length ctx >= n) metasenv in let purge_unused_lambdas metasenv t = let rec aux = function @@ -156,7 +135,7 @@ let saturationsres = 0 in in aux t in - let order_body_menv term body_metasenv = + let order_body_menv term body_metasenv c1_pis c2_pis = let rec purge_lambdas = function | Cic.Lambda (_,_,t) -> purge_lambdas t | t -> t @@ -168,27 +147,52 @@ let saturationsres = 0 in let metas = CicUtil.metas_of_term t in let metas = List.map fst metas in let metas = - List.filter - (fun i -> List.for_all (fun (j,_) -> j<>i) acc) - metas - in + List.filter (fun i -> List.for_all (fun (j,_) -> j<>i) acc) metas in let metas = List.map (fun i -> i,n) metas in metas @ acc, n+1) ([],0) l in let l_c2 = skip_appl (purge_lambdas term) in - let l_c1 = - match HExtlib.list_last l_c2 with - | Cic.Appl l -> List.tl l - | _ -> assert false + let l_c2_b,l_c2_a = + try + HExtlib.split_nth (c2_pis - sat2 - 1) l_c2 + with + Failure _ -> assert false in + let l_c1,l_c2_a = + match l_c2_a with + Cic.Appl (_::l_c1)::tl -> l_c1,tl + | _ -> assert false in + let meta_to_be_coerced = + try + match List.nth l_c1 (c1_pis - sat1 - 1) with + | Cic.Meta (i,_) -> i + | _ -> assert false + with + Failure _ -> assert false in - (* i should cut off the last elem of l_c2 *) - let meta2no = fst (metas_that_saturate (l_c1 @ l_c2)) in - List.sort + let meta2no = fst (metas_that_saturate (l_c2_b @ l_c1 @ l_c2_a)) in + let sorted = + List.sort (fun (i,ctx1,ty1) (j,ctx1,ty1) -> try List.assoc i meta2no - List.assoc j meta2no with Not_found -> assert false) body_metasenv + in + let rec position_of n acc = + function + [] -> assert false + | (i,_,_)::_ when i = n -> acc + | _::tl -> position_of n (acc + 1) tl + in + debug_print + (lazy ("META_TO_BE_COERCED: " ^ string_of_int meta_to_be_coerced)); + let position_of_meta_to_be_coerced = + position_of meta_to_be_coerced 0 sorted in + debug_print (lazy ("POSITION_OF_META_TO_BE_COERCED: " ^ + string_of_int position_of_meta_to_be_coerced)); + debug_print (lazy ("SATURATIONS: " ^ + string_of_int (List.length sorted - position_of_meta_to_be_coerced - 1))); + sorted, List.length sorted - position_of_meta_to_be_coerced - 1 in let namer l n = let l = List.map (function Cic.Name s -> s | _ -> "A") l in @@ -206,14 +210,14 @@ let saturationsres = 0 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, names_c1 = count_saturations_needed c1_ty 0 in - let saturations_for_c2, names_c2 = count_saturations_needed c2_ty arity in - let c = compose c1 saturations_for_c1 c2 saturations_for_c2 in - let spine_len = saturations_for_c1 + saturations_for_c2 in + let c1_pis, names_c1 = count_pis c1_ty 0 in + let c2_pis, names_c2 = count_pis c2_ty arity in + let c = compose c1 c1_pis c2 c2_pis in + let spine_len = c1_pis + c2_pis in let c = mk_lambda_spine c (namer (names_c1 @ names_c2)) spine_len in debug_print (lazy ("COMPOSTA: " ^ CicPp.ppterm c)); let old_insert_coercions = !CicRefine.insert_coercions in - let c, metasenv, univ = + let c, metasenv, univ, saturationsres = try CicRefine.insert_coercions := false; let term, ty, metasenv, ugraph = @@ -227,7 +231,9 @@ let saturationsres = 0 in in debug_print(lazy("B_MENV: "^CicMetaSubst.ppmetasenv [] body_metasenv)); debug_print(lazy("L_MENV: "^CicMetaSubst.ppmetasenv [] lambdas_metasenv)); - let body_metasenv = order_body_menv term body_metasenv in + let body_metasenv, saturationsres = + order_body_menv term body_metasenv c1_pis c2_pis + in debug_print(lazy("ORDERED_B_MENV: "^CicMetaSubst.ppmetasenv [] body_metasenv)); let subst = create_subst_from_metas_to_rels spine_len body_metasenv in debug_print (lazy("SUBST: "^CicMetaSubst.ppsubst body_metasenv subst)); @@ -256,10 +262,13 @@ let saturationsres = 0 in lambdas_metasenv) metasenv in + debug_print (lazy ("####################")); debug_print (lazy ("COMPOSED: " ^ CicPp.ppterm term)); - debug_print(lazy("MENV: "^CicMetaSubst.ppmetasenv [] metasenv)); + debug_print (lazy ("SATURATIONS: " ^ string_of_int saturationsres)); + debug_print (lazy ("MENV: "^CicMetaSubst.ppmetasenv [] metasenv)); + debug_print (lazy ("####################")); CicRefine.insert_coercions := old_insert_coercions; - term, metasenv, ugraph + term, metasenv, ugraph, saturationsres with | CicRefine.RefineFailure s | CicRefine.Uncertain s -> debug_print s; @@ -268,7 +277,7 @@ let saturationsres = 0 in | exn -> CicRefine.insert_coercions := old_insert_coercions; raise exn - in + in c, metasenv, univ, saturationsres ;; @@ -371,8 +380,7 @@ let close_coercion_graph src tgt uri saturations baseuri = let t, menv, univ, saturationsres = generate_composite' (u,saturations1) (CoercDb.term_of_carr (CoercDb.Uri coer), - saturations) - [] [] univ arity true + saturations) [] [] univ arity in if (menv = []) then HLog.warn "MENV non empty after composing coercions"; @@ -407,9 +415,9 @@ CicCoercion.set_close_coercion_graph close_coercion_graph;; (* generate_composite (c2 (c1 s)) in the universe graph univ * both living in the same context and metasenv *) -let generate_composite c1 c2 context metasenv univ arity b = +let generate_composite c1 c2 context metasenv univ arity = let a,b,c,_ = - generate_composite' (c1,0) (c2,0) context metasenv univ arity b + generate_composite' (c1,0) (c2,0) context metasenv univ arity in a,b,c ;; diff --git a/helm/software/components/tactics/closeCoercionGraph.mli b/helm/software/components/tactics/closeCoercionGraph.mli index 1acea0eeb..baf926ff1 100644 --- a/helm/software/components/tactics/closeCoercionGraph.mli +++ b/helm/software/components/tactics/closeCoercionGraph.mli @@ -36,5 +36,4 @@ exception UnableToCompose val generate_composite: Cic.term -> Cic.term -> Cic.context -> Cic.metasenv -> CicUniv.universe_graph -> int (* arity *) -> - bool (* last lambda goes with innermost arg *) -> Cic.term * Cic.metasenv * CicUniv.universe_graph diff --git a/helm/software/components/tactics/compose.ml b/helm/software/components/tactics/compose.ml index 137e919b0..cd355dc27 100644 --- a/helm/software/components/tactics/compose.ml +++ b/helm/software/components/tactics/compose.ml @@ -79,7 +79,7 @@ let compose_core t2 t1 (proof, goal) = try let t, menv1, _ = CloseCoercionGraph.generate_composite t2 t1 context menv - CicUniv.oblivion_ugraph arity false + CicUniv.oblivion_ugraph arity in assert (List.length menv1 = List.length menv); generate tl menv (t::acc)