991 #	define	REP(f, t)	((f)*8 + (t))  in repeat()  macro
1000 	switch (REP(MAP(from), MAP(to))) {  in repeat()
1001 	case REP(0, 0):			/* must be user doing this */  in repeat()
1004 	case REP(0, 1):			/* as x{1,1}? */  in repeat()
1005 	case REP(0, N):			/* as x{1,n}? */  in repeat()
1006 	case REP(0, INF):		/* as x{1,}? */  in repeat()
1016 	case REP(1, 1):			/* trivial case */  in repeat()
1019 	case REP(1, N):			/* as x?x{1,n-1} */  in repeat()
1031 	case REP(1, INF):		/* as x+ */  in repeat()
1035 	case REP(N, N):			/* as xx{m-1,n-1} */  in repeat()
1039 	case REP(N, INF):		/* as xx{n-1,INF} */  in repeat()