;;
let rec flexible_arg context subst = function
- | NCic.Meta (i,_) | NCic.Appl (NCic.Meta (i,_) :: _)->
+ | NCic.Meta (i,_) ->
(try
let _,_,t,_ = List.assoc i subst in
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
raise (MetaSubstFailure msg)
;;
-let mk_meta ?(attrs=[]) metasenv context ty =
- let tyof = List.map (function `Name s -> `Name ("typeof_"^s) | x -> x) in
- let rec mk_meta attrs n metasenv context = function
- | `WithType ty ->
- let len = List.length context in
- let menv_entry = (n, (attrs, 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 attrs) n metasenv [] (`WithType ty)
- | `Type ->
- let metasenv, _, ty, _ =
- mk_meta (tyof attrs) (newmeta ()) metasenv context `Sort in
- mk_meta attrs n metasenv context (`WithType ty)
- | `Term ->
- let metasenv, _, ty, _ =
- mk_meta (tyof attrs) (newmeta ()) metasenv context `Type in
- mk_meta attrs n metasenv context (`WithType ty)
- in
- mk_meta attrs (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 ~attrs:[`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