let compare = Pervasives.compare
end
module S = Set.Make(Codomain)
-module TI = Discrimination_tree.DiscriminationTreeIndexing(S)
+module TI = Discrimination_tree.Make(Cic_indexable.CicIndexable)(S)
type universe = TI.t
-let empty = TI.empty
+let empty = TI.empty ;;
+
+let iter u f =
+ TI.iter u
+ (fun p s -> f p (S.elements s))
;;
let get_candidates univ ty =
S.elements (TI.retrieve_unifiables univ ty)
;;
+let in_universe univ ty =
+ let candidates = get_candidates univ ty in
+ List.fold_left
+ (fun res cand ->
+ match res with
+ | Some found -> Some found
+ | None ->
+ let candty,_ =
+ CicTypeChecker.type_of_aux' [] [] cand CicUniv.oblivion_ugraph in
+ let same ,_ =
+ CicReduction.are_convertible [] candty ty CicUniv.oblivion_ugraph in
+ if same then Some cand else None
+ ) None candidates
+;;
+
let rec unfold context = function
| Cic.Prod(name,s,t) ->
let t' = unfold ((Some (name,Cic.Decl s))::context) t in
- Cic.Prod(name,s,t')
+ Cic.Prod(name,s,t')
| t -> ProofEngineReduction.unfold context t
let rec collapse_head_metas t =
let rec dummies_of_coercions =
function
- | Cic.Appl (c::l) when CoercDb.is_a_coercion' c ->
- Cic.Meta (-1,[])
+ | Cic.Appl (c::l) when CoercDb.is_a_coercion c <> None ->
+ Cic.Meta (-1,[])
| Cic.Appl l ->
- let l' = List.map dummies_of_coercions l in Cic.Appl l'
+ let l' = List.map dummies_of_coercions l in Cic.Appl l'
| Cic.Lambda(n,s,t) ->
- let s' = dummies_of_coercions s in
- let t' = dummies_of_coercions t in
- Cic.Lambda (n,s',t')
+ let s' = dummies_of_coercions s in
+ let t' = dummies_of_coercions t in
+ Cic.Lambda (n,s',t')
| Cic.Prod(n,s,t) ->
- let s' = dummies_of_coercions s in
- let t' = dummies_of_coercions t in
- Cic.Prod (n,s',t')
- | Cic.LetIn(n,s,t) ->
- let s' = dummies_of_coercions s in
- let t' = dummies_of_coercions t in
- Cic.LetIn (n,s',t')
+ let s' = dummies_of_coercions s in
+ let t' = dummies_of_coercions t in
+ Cic.Prod (n,s',t')
+ | Cic.LetIn(n,s,ty,t) ->
+ let s' = dummies_of_coercions s in
+ let ty' = dummies_of_coercions ty in
+ let t' = dummies_of_coercions t in
+ Cic.LetIn (n,s',ty',t')
| Cic.MutCase _ -> Cic.Meta (-1,[])
| t -> t
;;
+
let rec head remove_coercions t =
let clean_up t =
if remove_coercions then dummies_of_coercions t
[head true ty; head true (unfold context ty)]
with ProofEngineTypes.Fail _ -> [head true ty]
+let key term = head false term;;
+
let index_term_and_unfolded_term univ context t ty =
let key = head true ty in
let univ = index univ key t in
let remove_uri univ uri =
let term = CicUtil.term_of_uri uri in
- let ty,_ = CicTypeChecker.type_of_aux' [] [] term CicUniv.empty_ugraph in
+ let ty,_ = CicTypeChecker.type_of_aux' [] [] term CicUniv.oblivion_ugraph in
remove univ [] term ty