(* $Id: nCicRefiner.mli 9227 2008-11-21 16:00:06Z tassi $ *)
-module COT : Set.OrderedType with type t = NCic.term =
+let debug s = prerr_endline (Lazy.force s);;
+let debug _ = ();;
+
+module COT : Set.OrderedType with type t = int * NCic.term =
struct
- type t = NCic.term
+ type t = int * NCic.term
let compare = Pervasives.compare
end
module HintSet = Set.Make(COT)
-module DB =
+module HDB =
+ Discrimination_tree.Make(NDiscriminationTree.NCicIndexable)(HintSet)
+
+module EQDB =
Discrimination_tree.Make(NDiscriminationTree.NCicIndexable)(HintSet)
-type db = DB.t
+type db =
+ HDB.t * (* hint database: (dummy A B)[?] |-> \forall X.(summy a b)[X] *)
+ EQDB.t (* eqclass DB: A[?] |-> \forall X.B[X] and viceversa *)
+
+exception HintNotValid
+
+let skel_dummy = NCic.Implicit `Type;;
+
+class type g_status =
+ object
+ method uhint_db: db
+ end
+
+class status =
+ object
+ val db = HDB.empty, EQDB.empty
+ method uhint_db = db
+ method set_uhint_db v = {< db = v >}
+ method set_unifhint_status
+ : 'status. #g_status as 'status -> 'self
+ = fun o -> {< db = o#uhint_db >}
+ end
let dummy = NCic.Const (NReference.reference_of_string "cic:/dummy_conv.dec");;
let pair t1 t2 = (NCic.Appl [dummy;t1;t2]) ;;
-let index_hint hdb context t1 t2 =
+let index_hint hdb context t1 t2 precedence =
assert (
(match t1 with
| NCic.Meta _ | NCic.Appl (NCic.Meta _ :: _) -> false | _ -> true)
(match t2 with
| NCic.Meta _ | NCic.Appl (NCic.Meta _ :: _) -> false | _ -> true)
);
- let pair' = pair t1 t2 in
- let data =
+ (* here we do not use skel_dummy since it could cause an assert false in
+ * the subst function that lives in the kernel *)
+ let hole = NCic.Meta (-1,(0,NCic.Irl 0)) in
+ let t1_skeleton =
+ List.fold_left (fun t _ -> NCicSubstitution.subst hole t) t1 context
+ in
+ let t2_skeleton =
+ List.fold_left (fun t _ -> NCicSubstitution.subst hole t) t2 context
+ in
+ let rec cleanup_skeleton () = function
+ | NCic.Meta _ -> skel_dummy
+ | t -> NCicUtils.map (fun _ () -> ()) () cleanup_skeleton t
+ in
+ let t1_skeleton = cleanup_skeleton () t1_skeleton in
+ let t2_skeleton = cleanup_skeleton () t2_skeleton in
+ let src = pair t1_skeleton t2_skeleton in
+ let ctx2abstractions context t =
List.fold_left
(fun t (n,e) ->
match e with
| NCic.Decl ty -> NCic.Prod (n,ty,t)
- | _ -> assert false)
- pair' context in
- let src =
- List.fold_left
- (fun t (_,e) ->
- match e with
- | NCic.Decl _ ->
- NCicSubstitution.subst (NCic.Meta (-1,(0,NCic.Irl 0))) t
- | _ -> assert false)
- pair' context in
- DB.index hdb src data
+ | NCic.Def (b,ty) -> NCic.LetIn (n,ty,b,t))
+ t context
+ in
+ let data_hint = ctx2abstractions context (pair t1 t2) in
+ let data_t1 = t2_skeleton in
+ let data_t2 = t1_skeleton in
+
+ debug(lazy ("INDEXING: " ^
+ NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] src ^ " |==> " ^
+ NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] data_hint));
+
+ hdb#set_uhint_db (
+ HDB.index (fst (hdb#uhint_db)) src (precedence, data_hint),
+ EQDB.index
+ (EQDB.index (snd (hdb#uhint_db)) t2_skeleton (precedence, data_t2))
+ t1_skeleton (precedence, data_t1))
;;
-let empty_db = DB.empty ;;
+let add_user_provided_hint db t precedence =
+ let c, a, b =
+ let rec aux ctx = function
+ | NCic.Appl l ->
+ (match List.rev l with
+ | b::a::_ ->
+ if
+ let ty_a =
+ NCicTypeChecker.typeof ~metasenv:[] ~subst:[] ctx a
+ in
+ let ty_b =
+ NCicTypeChecker.typeof ~metasenv:[] ~subst:[] ctx b
+ in
+ NCicReduction.are_convertible
+ ~metasenv:[] ~subst:[] ctx ty_a ty_b
+ &&
+ NCicReduction.are_convertible
+ ~metasenv:[] ~subst:[] ctx a b
+ then ctx, a, b
+ else raise HintNotValid
+ | _ -> assert false)
+ | NCic.Prod (n,s,t) -> aux ((n, NCic.Decl s) :: ctx) t
+ | NCic.LetIn (n,ty,t,b) -> aux ((n, NCic.Def (t,ty)) :: ctx) b
+ | _ -> assert false
+ in
+ aux [] t
+ in
+ index_hint db c a b precedence
+;;
let db () =
- let _,_,_,x,_,_ = NCicEnvironment.get_checked_def
- (NReference.reference_of_string "cic:/matita/tests/pullback/xxx.def(0)")
+ let combine f l =
+ List.flatten
+ (let rec aux = function
+ | u1 :: tl -> List.map (f u1) tl :: aux tl
+ | [] -> []
+ in aux l)
in
- let rec decontextualize ctx = function
- | NCic.Prod (n,s,t) -> decontextualize ((n,NCic.Decl s)::ctx) t
- | t -> ctx, t
+ let mk_hint (u1,_,_) (u2,_,_) =
+ let l = OCic2NCic.convert_obj u1
+ (fst (CicEnvironment.get_obj CicUniv.oblivion_ugraph u1)) in
+ let r = OCic2NCic.convert_obj u2
+ (fst (CicEnvironment.get_obj CicUniv.oblivion_ugraph u2)) in
+ match List.hd l,List.hd r with
+ | (_,h1,_,_,NCic.Constant (_,_,Some l,_,_)),
+ (_,h2,_,_,NCic.Constant (_,_,Some r,_,_)) ->
+ let rec aux ctx t1 t2 =
+ match t1, t2 with
+ | NCic.Lambda (n1,s1,b1), NCic.Lambda(_,s2,b2) ->
+ if NCicReduction.are_convertible ~subst:[] ~metasenv:[] ctx s1 s2
+ then aux ((n1, NCic.Decl s1) :: ctx) b1 b2
+ else []
+ | b1,b2 ->
+ if NCicReduction.are_convertible ~subst:[] ~metasenv:[] ctx b1 b2
+ then begin
+ let rec mk_rels =
+ function 0 -> [] | n -> NCic.Rel n :: mk_rels (n-1)
+ in
+ let n1 =
+ NCic.Appl (NCic.Const(OCic2NCic.reference_of_ouri
+ u1 (NReference.Def h1)) :: mk_rels (List.length ctx))
+ in
+ let n2 =
+ NCic.Appl (NCic.Const(OCic2NCic.reference_of_ouri
+ u2 (NReference.Def h2)) :: mk_rels (List.length ctx))
+ in
+ [ctx,b1,b2; ctx,b1,n2; ctx,n1,b2; ctx,n1,n2]
+ end else []
+ in
+ aux [] l r
+ | _ -> []
+ in
+ let _hints =
+ List.fold_left
+ (fun acc (_,_,l) ->
+ acc @
+ if List.length l > 1 then
+ combine mk_hint l
+ else [])
+ [] (CoercDb.to_list (CoercDb.dump ()))
in
- match (decontextualize [] x) with
- | ctx, NCic.Appl [_;_;a;b] -> index_hint empty_db ctx a b
- | _ -> assert false
+ prerr_endline "MISTERO";
+ assert false (* ERA
+ List.fold_left
+ (fun db -> function
+ | (ctx,b1,b2) -> index_hint db ctx b1 b2 0)
+ !user_db (List.flatten hints)
+*)
;;
+let saturate ?(delta=0) metasenv subst context ty goal_arity =
+ assert (goal_arity >= 0);
+ let rec aux metasenv = function
+ | NCic.Prod (name,s,t) as ty ->
+ let metasenv1, _, arg,_ =
+ NCicMetaSubst.mk_meta ~name:name metasenv context (`WithType s) in
+ let t, metasenv1, args, pno =
+ aux metasenv1 (NCicSubstitution.subst arg t)
+ in
+ if pno + 1 = goal_arity then
+ ty, metasenv, [], goal_arity+1
+ else
+ t, metasenv1, arg::args, pno+1
+ | ty ->
+ match NCicReduction.whd ~subst context ty ~delta with
+ | NCic.Prod _ as ty -> aux metasenv ty
+ | _ -> ty, metasenv, [], 0 (* differs from the other impl in this line*)
+ in
+ let res, newmetasenv, arguments, _ = aux metasenv ty in
+ res, newmetasenv, arguments
+;;
+
+let eq_class_of hdb t1 =
+ let eq_class =
+ if NDiscriminationTree.NCicIndexable.path_string_of t1 =
+ [Discrimination_tree.Variable]
+ then
+ [] (* if the trie is unable to handle the key, we skip the query since
+ it sould retulr the whole content of the trie *)
+ else
+ let candidates = EQDB.retrieve_unifiables (snd hdb#uhint_db) t1 in
+ let candidates = HintSet.elements candidates in
+ let candidates = List.sort (fun (x,_) (y,_) -> compare x y) candidates in
+ List.map snd candidates
+ in
+ debug(lazy("eq_class of: " ^ NCicPp.ppterm ~metasenv:[] ~context:[] ~subst:[]
+ t1 ^ " is\n" ^ String.concat "\n"
+ (List.map (NCicPp.ppterm ~subst:[] ~metasenv:[] ~context:[]) eq_class)));
+ eq_class
+;;
let look_for_hint hdb metasenv subst context t1 t2 =
+ debug(lazy ("KEY1: "^NCicPp.ppterm ~metasenv ~subst ~context t1));
+ debug(lazy ("KEY2: "^NCicPp.ppterm ~metasenv ~subst ~context t2));
(*
- prerr_endline ("KEY1: "^NCicPp.ppterm ~metasenv ~subst ~context (pair t1 t2));
- prerr_endline ("KEY2: "^NCicPp.ppterm ~metasenv ~subst ~context (pair t2 t1));
- DB.iter hdb
+ HDB.iter hdb
(fun p ds ->
prerr_endline ("ENTRY: " ^
NDiscriminationTree.NCicIndexable.string_of_path p ^ " |--> " ^
String.concat "|" (List.map (NCicPp.ppterm ~metasenv:[] ~subst:[]
~context:[]) (HintSet.elements ds))));
*)
- let candidates1 = DB.retrieve_unifiables hdb (pair t1 t2) in
- let candidates2 = DB.retrieve_unifiables hdb (pair t2 t1) in
+ let candidates1 = HDB.retrieve_unifiables (fst hdb#uhint_db) (pair t1 t2) in
+ let candidates2 = HDB.retrieve_unifiables (fst hdb#uhint_db) (pair t2 t1) in
let candidates1 =
- List.map (fun ty ->
- true,NCicMetaSubst.saturate ~delta:max_int metasenv subst context ty 0)
+ List.map (fun (prec,ty) ->
+ prec,true,saturate ~delta:max_int metasenv subst context ty 0)
(HintSet.elements candidates1)
in
let candidates2 =
- List.map (fun ty ->
- false,NCicMetaSubst.saturate ~delta:max_int metasenv subst context ty 0)
+ List.map (fun (prec,ty) ->
+ prec,false,saturate ~delta:max_int metasenv subst context ty 0)
(HintSet.elements candidates2)
in
+ let rc =
+ List.map
+ (fun (p,b,(t,m,_)) ->
+ let rec aux () (m,l as acc) = function
+ | NCic.Meta _ as t -> acc, t
+ | NCic.LetIn (name,ty,bo,t) ->
+ let m,_,i,_=
+ NCicMetaSubst.mk_meta ~name m context (`WithType ty)in
+ let t = NCicSubstitution.subst i t in
+ aux () (m, (i,bo)::l) t
+ | t -> NCicUntrusted.map_term_fold_a (fun _ () -> ()) () aux acc t
+ in
+ let (m,l), t = aux () (m,[]) t in
+ p,b,(t,m,l))
+ (candidates1 @ candidates2)
+ in
+ let rc =
List.map
(function
- | (true,(NCic.Appl [_; t1; t2],metasenv,_)) -> metasenv, t1, t2
- | (false,(NCic.Appl [_; t1; t2],metasenv,_)) -> metasenv, t2, t1
+ | (prec,true,(NCic.Appl [_; t1; t2],metasenv,l))-> prec,metasenv,(t1,t2),l
+ | (prec,false,(NCic.Appl [_; t1; t2],metasenv,l))-> prec,metasenv,(t2,t1),l
| _ -> assert false)
- (candidates1 @ candidates2)
+ rc
+ in
+ let rc =
+ List.sort (fun (x,_,_,_) (y,_,_,_) -> Pervasives.compare x y) rc
+ in
+ let rc = List.map (fun (_,x,y,z) -> x,y,z) rc in
+
+ debug(lazy ("Hints:"^
+ String.concat "\n" (List.map
+ (fun (metasenv, (t1, t2), premises) ->
+ ("\t" ^ String.concat "; "
+ (List.map (fun (a,b) ->
+ NCicPp.ppterm ~margin:max_int ~metasenv ~subst ~context a ^
+ " =?= "^
+ NCicPp.ppterm ~margin:max_int ~metasenv ~subst ~context b)
+ premises) ^
+ " ==> "^
+ NCicPp.ppterm ~margin:max_int ~metasenv ~subst ~context t1 ^
+ " = "^NCicPp.ppterm ~margin:max_int ~metasenv ~subst ~context t2))
+ rc)));
+
+ rc
;;
projects / helm.git / blobdiff