Tacinterp.Valuetype t = Geninterp.Val.tval of_constr : EConstr.constr -> tval to_constr : t -> EConstr.constr optionval of_int : int -> tval to_int : t -> int optionval of_closure : Geninterp.interp_sign -> Tacexpr.glob_tactic_expr -> tval cast : 'a Genarg.typed_abstract_argument_type -> Geninterp.Val.t -> 'aval apply : t -> t list -> unit Proofview.tactic