Pcoq.Rule
val stop : ('self, Gramlib.Grammar.norec, 'r, 'r) t
val next : ('self, _, 'a, 'r) t -> ('self, _, 'b) Symbol.t -> ('self, Gramlib.Grammar.mayrec, 'b -> 'a, 'r) t
val next_norec : ('self, Gramlib.Grammar.norec, 'a, 'r) t -> ('self, Gramlib.Grammar.norec, 'b) Symbol.t -> ('self, Gramlib.Grammar.norec, 'b -> 'a, 'r) t