+let fail_tac =
+ let fail_tac (proof,goal) =
+ let _, metasenv, _, _ = proof in
+ let _, _, _ = CicUtil.lookup_meta goal metasenv in
+ raise (Fail "fail tactical")
+ in
+ mk_tactic fail_tac
+
+module type Status =
+ sig
+ type input_status
+ type output_status
+ type tactic
+ val id_tac : tactic
+ val mk_tactic : (input_status -> output_status) -> tactic
+ val apply_tactic : tactic -> input_status -> output_status
+ val goals : output_status -> ProofEngineTypes.goal list
+ val set_goals: output_status -> ProofEngineTypes.goal list -> output_status
+ val focus : output_status -> ProofEngineTypes.goal -> input_status
+ end
+
+module type T =
+ sig
+ type tactic
+
+ val first: tactics: (string * tactic) list -> tactic
+
+ val thens: start: tactic -> continuations: tactic list -> tactic
+
+ val then_: start: tactic -> continuation: tactic -> tactic
+
+ (** "folding" of then_ *)
+ val seq: tactics: tactic list -> tactic
+
+ val repeat_tactic: tactic: tactic -> tactic
+
+ val do_tactic: n: int -> tactic: tactic -> tactic
+
+ val try_tactic: tactic: tactic -> tactic
+
+ val solve_tactics: tactics: (string * tactic) list -> tactic
+ end
+
+module Make (S:Status) : T with type tactic = S.tactic =
+struct
+type tactic = S.tactic
+