TPARM_4
#define TPARM_4(a,b,c,d,e) tparm(a,TPARM_N(b),TPARM_N(c),TPARM_N(d),TPARM_N(e))
#define TPARM_4(a,b,c,d,e) TPARM_5(a,b,c,d,e,0)