type tactic
val mk_tactic: (status -> proof * goal list) -> tactic
+ (** what, hypothesis patterns, conclusion pattern *)
+type pattern = Cic.term option * (string * Cic.term) list * Cic.term
+
+ (** conclusion_pattern [t] returns the pattern (t,[],%) *)
+val conclusion_pattern : Cic.term option -> pattern
+
(** tactic failure *)
exception Fail of string