| NCicUtils.Meta_not_found _ -> assert false
;;
-let rec flexible_arg subst = function
- | NCic.Meta (i,_) | NCic.Appl (NCic.Meta (i,_) :: _)->
+let rec flexible_arg context subst = function
+ | NCic.Meta (i,_) ->
(try
let _,_,t,_ = List.assoc i subst in
- flexible_arg subst t
+ flexible_arg context subst t
with Not_found -> true)
+ | NCic.Appl (NCic.Meta (i,_) :: args)->
+ (try
+ let _,_,t,_ = List.assoc i subst in
+ flexible_arg context subst
+ (NCicReduction.head_beta_reduce ~delta:max_int
+ (NCic.Appl (t :: args)))
+ with Not_found -> true)
+ (* this is a cheap whd, it only performs zeta-reduction.
+ *
+ * it works when the **omissis** disambiguation algorithm
+ * is run on `let x := K a b in t`, K is substituted for a
+ * ? and thus in t metavariables have a flexible Rel
+ *)
+ | NCic.Rel i ->
+ (try
+ match List.nth context (i-1)
+ with
+ | _,NCic.Def (bo,_) ->
+ flexible_arg context subst
+ (NCicSubstitution.lift i bo)
+ | _ -> false
+ with
+ | Failure _ ->
+ prerr_endline (Printf.sprintf "Rel %d inside context:\n%s" i
+ (NCicPp.ppcontext ~subst ~metasenv:[] context));
+ assert false
+ | Invalid_argument _ -> assert false)
| _ -> false
;;
-let in_scope_tag = "tag:in_scope" ;;
-let out_scope_tag_prefix = "tag:out_scope:"
-let out_scope_tag n = out_scope_tag_prefix ^ string_of_int n ;;
-let is_out_scope_tag tag =
- String.length tag > String.length out_scope_tag_prefix &&
- String.sub tag 0 (String.length out_scope_tag_prefix) = out_scope_tag_prefix
-;;
+let is_out_scope = function `OutScope _ -> true | _ -> false;;
+let is_out_scope_tag = List.exists is_out_scope;;
let int_of_out_scope_tag tag =
- int_of_string
- (String.sub tag (String.length out_scope_tag_prefix)
- (String.length tag - (String.length out_scope_tag_prefix)))
+ match List.filter is_out_scope tag with [`OutScope n] -> n | _ -> assert false
;;
| NCic.Meta (i,_) ->
(try
let tag, _, _, _ = NCicUtils.lookup_subst i subst in
- tag = Some in_scope_tag
+ List.mem `InScope tag
with NCicUtils.Subst_not_found _ -> false)
| _ -> false
in
in
try aux () () t; false with Found -> true
in
- let unify_list ~alpha in_scope =
+ let unify_list in_scope =
match l with
| _, NCic.Irl _ -> fun _ _ _ _ _ -> None
| shift, NCic.Ctx l -> fun metasenv subst context k t ->
- if flexible_arg subst t || contains_in_scope subst t then None else
- let lb = List.map (fun t -> t, flexible_arg subst t) l in
+ if flexible_arg context subst t || contains_in_scope subst t then None else
+ let lb =
+ List.map (fun t ->
+ let t = NCicSubstitution.lift (k+shift) t in
+ t, flexible_arg context subst t)
+ l
+ in
HExtlib.list_findopt
(fun (li,flexible) i ->
if flexible || i < in_scope then None else
- let li = NCicSubstitution.lift (k+shift) li in
- if alpha then
- if NCicReduction.alpha_eq metasenv subst context li t then
- Some ((metasenv,subst), NCic.Rel (i+1+k))
- else
- None
- else
- match unify metasenv subst context li t with
- | Some (metasenv,subst) ->
- Some ((metasenv, subst), NCic.Rel (i+1+k))
- | None -> None)
+ match unify metasenv subst context li t with
+ | Some (metasenv,subst) ->
+ Some ((metasenv, subst), NCic.Rel (i+1+k))
+ | None -> None)
lb
in
let rec aux (context,k,in_scope) (metasenv, subst as ms) t =
- match unify_list ~alpha:true in_scope metasenv subst context k t with
+ match unify_list in_scope metasenv subst context k t with
| Some x -> x
| None ->
- try
match t with
| NCic.Rel n as t when n <= k -> ms, t
| NCic.Rel n ->
(try
- match List.nth context (n-k-1) with
+ match List.nth context (n-1) with
| _,NCic.Def (bo,_) ->
(try ms, NCic.Rel ((position in_scope (n-k) l) + k)
with NotInTheList ->
(try
let tag,c,t,ty = NCicUtils.lookup_subst i subst in
let in_scope, clear =
- match tag with
- | Some tag when tag = in_scope_tag -> 0, true
- | Some tag when is_out_scope_tag tag->int_of_out_scope_tag tag,true
- | _ -> in_scope, false
+ if List.mem `InScope tag then 0, true
+ else if is_out_scope_tag tag then int_of_out_scope_tag tag,true
+ else in_scope, false
in
let ms =
if not clear then ms
else
metasenv,
- (i,(None,c,t,ty)) :: List.filter (fun j,_ -> i <> j) subst
+ (i,([],c,t,ty)) :: List.filter (fun j,_ -> i <> j) subst
in
aux (context,k,in_scope) ms (NCicSubstitution.subst_meta l1 t)
with NCicUtils.Subst_not_found _ ->
| t ->
NCicUntrusted.map_term_fold_a
(fun e (c,k,s) -> (e::c,k+1,s)) (context,k,in_scope) aux ms t
- with NotInTheList ->
- match unify_list ~alpha:false in_scope metasenv subst context k t with
- | Some x -> x
- | None -> raise NotInTheList
in
+(*
+ prerr_endline (
+ "DELIFTO " ^ NCicPp.ppterm ~metasenv ~subst ~context t ^ " w.r.t. " ^
+ String.concat ", " (List.map (NCicPp.ppterm ~metasenv ~subst ~context) (
+ let shift, lc = l in
+ (List.map (NCicSubstitution.lift shift)
+ (NCicUtils.expand_local_context lc))
+ )));
+*)
try aux (context,0,0) (metasenv,subst) t
with NotInTheList ->
(* This is the case where we fail even first order unification. *)
let lc = NCicUtils.expand_local_context lc in
let l = List.map (NCicSubstitution.lift shift) lc in
if
- List.exists (fun t-> NCicUntrusted.metas_of_term subst context t = []) l
+ List.exists (fun t-> NCicUntrusted.metas_of_term subst context t <> [])l
then
raise (Uncertain msg)
else
raise (MetaSubstFailure msg)
;;
-let mk_meta ?name metasenv context ty =
- let tyof = function Some s -> Some ("typeof_"^s) | None -> None in
- let rec mk_meta name n metasenv context = function
- | `WithType ty ->
- let len = List.length context in
- let menv_entry = (n, (name, context, ty)) in
- menv_entry :: metasenv, n, NCic.Meta (n, (0,NCic.Irl len)), ty
- | `Sort ->
- let ty = NCic.Implicit (`Typeof n) in
- mk_meta (tyof name) n metasenv [] (`WithType ty)
- | `Type ->
- let metasenv, _, ty, _ =
- mk_meta (tyof name) (newmeta ()) metasenv context `Sort in
- mk_meta name n metasenv context (`WithType ty)
- | `Term ->
- let metasenv, _, ty, _ =
- mk_meta (tyof name) (newmeta ()) metasenv context `Type in
- mk_meta name n metasenv context (`WithType ty)
- in
- mk_meta name (newmeta ()) metasenv context ty
+let mk_meta ?(attrs=[]) metasenv context ?with_type kind =
+ assert(kind <> `IsSort || context = []);
+ let n = newmeta () in
+ let ty= match with_type with None-> NCic.Implicit (`Typeof n)| Some x ->x in
+ let len = List.length context in
+ let attrs = NCicUntrusted.set_kind kind attrs in
+ let menv_entry = (n, (attrs, context, ty)) in
+ menv_entry :: metasenv, n, NCic.Meta (n, (0,NCic.Irl len)), ty
+;;
+
+let extend_meta metasenv n =
+ try
+ let attrs,cc,ty = NCicUtils.lookup_meta n metasenv in
+ (match ty with
+ | NCic.Implicit (`Typeof _) ->
+ let mk_meta context kind =
+ let metasenv, _, ty, _ = mk_meta metasenv context kind in
+ (n, (attrs, cc, ty)) :: List.filter (fun x,_ -> x <> n) metasenv, ty
+ in
+ (match NCicUntrusted.kind_of_meta attrs with
+ | `IsSort
+ | `IsType -> mk_meta [] `IsSort
+ | `IsTerm -> mk_meta cc `IsType)
+ | ty -> metasenv, ty)
+ with NCicUtils.Meta_not_found _ -> assert false
;;
let saturate ?(delta=0) metasenv subst context ty goal_arity =
let rec aux metasenv = function
| NCic.Prod (name,s,t) as ty ->
let metasenv1, _, arg,_ =
- mk_meta ~name:name metasenv context (`WithType s) in
+ mk_meta ~attrs:[`Name name] metasenv context ~with_type:s `IsTerm in
let t, metasenv1, args, pno =
aux metasenv1 (NCicSubstitution.subst arg t)
in
projects / helm.git / blobdiff