(**
current proof (proof uri * metas * (in)complete proof * term to be prooved)
*)
-type proof = UriManager.uri * Cic.metasenv * Cic.term * Cic.term
+type proof = UriManager.uri option * Cic.metasenv * Cic.term * Cic.term
(** current goal, integer index *)
type goal = int
type status = proof * goal
+
(**
a tactic: make a transition from one status to another one or, usually,
raise a "Fail" (@see Fail) exception in case of failure
*)
(** an unfinished proof with the optional current goal *)
-type tactic = status:status -> proof * goal list
+type tactic = status -> proof * goal list
(** tactic failure *)
exception Fail of string