1119 #	define	REP(f, t)	((f)*8 + (t))  in repeat()  macro
1128 	switch (REP(MAP(from), MAP(to))) {  in repeat()
1129 	case REP(0, 0):			/* must be user doing this */  in repeat()
1132 	case REP(0, 1):			/* as x{1,1}? */  in repeat()
1133 	case REP(0, N):			/* as x{1,n}? */  in repeat()
1134 	case REP(0, INF):		/* as x{1,}? */  in repeat()
1144 	case REP(1, 1):			/* trivial case */  in repeat()
1147 	case REP(1, N):			/* as x?x{1,n-1} */  in repeat()
1159 	case REP(1, INF):		/* as x+ */  in repeat()
1163 	case REP(N, N):			/* as xx{m-1,n-1} */  in repeat()
1167 	case REP(N, INF):		/* as xx{n-1,INF} */  in repeat()