+ YAZ_CHECK(compare(ct, "@or a @and b c", "a or (b and c)"));
+ YAZ_CHECK(compare(ct, "@or @and a b @and c d", "(a and b) or (c and d)"));
+ YAZ_CHECK(compare(ct, "@or @or a b @or c d", "(a or b) or (c or d)"));
+ YAZ_CHECK(compare(ct, "@and @and a b @and c d", "(a and b) and (c and d)"));
+