pushAnc x = modify $ \(PegState s a w n c b p) -> PegState s a w n c b (x:p)
pushAnc x = modify $ \(PegState s a w n c b p) -> PegState s a w n c b (x:p)
pushAnc x = modify $ \(PegState s a w n c b p) -> PegState s a w n c b (x:p)