28   using cf = std::chars_format;  in test()  typedef
29   using ut = std::underlying_type<cf>::type;  in test()
32     cf x = cf::scientific;  in test()
33     x |= cf::fixed;  in test()
34     assert(x == cf::general);  in test()
37     cf x = cf::general;  in test()
38     x &= cf::fixed;  in test()
39     assert(x == cf::fixed);  in test()
42     cf x = cf::general;  in test()
43     x ^= cf::fixed;  in test()
44     assert(x == cf::scientific);  in test()
47   assert(static_cast<ut>(cf::scientific & (cf::fixed | cf::hex)) == 0);  in test()
48   assert(static_cast<ut>(cf::fixed & (cf::scientific | cf::hex)) == 0);  in test()
49   assert(static_cast<ut>(cf::hex & (cf::scientific | cf::fixed)) == 0);  in test()
51   assert((cf::scientific | cf::fixed) == cf::general);  in test()
53   assert(static_cast<ut>(cf::scientific & cf::fixed) == 0);  in test()
55   assert((cf::general ^ cf::fixed) == cf::scientific);  in test()
57   assert((~cf::hex & cf::general) == cf::general);  in test()