p4raw-id: //depot/perl@24723
#define POPs (*sp--)
#define POPp (SvPVx(POPs, PL_na)) /* deprecated */
#define POPpx (SvPVx(POPs, n_a))
+#define POPpconstx (SvPVx_const(POPs, n_a))
#define POPpbytex (SvPVbytex(POPs, n_a))
#define POPn (SvNVx(POPs))
#define POPi ((IV)SvIVx(POPs))