+ s=yaz_nfa_add_range(n, 0, 'x','x' );
+ yaz_nfa_set_backref_point(n,s,2,1);
+ s1=yaz_nfa_add_sequence(n,s,tst4);
+ yaz_nfa_set_backref_point(n,s1,2,0);
+ yaz_nfa_set_result(n,s1,"xzk");
+
+ /* check return codes before doing any matches */
+ i=yaz_nfa_get_backref(n, 0, &cp1, &cp2 );
+ YAZ_CHECK_EQ(i,1);
+ i=yaz_nfa_get_backref(n, 3, &cp1, &cp2 );
+ YAZ_CHECK_EQ(i,2);
+ i=yaz_nfa_get_backref(n, 1, &cp1, &cp2 );
+ YAZ_CHECK_EQ(i,1);
+
+