116     check("0o0", 0o0, Octal, "0", None);  in parse_octal()
117     check("0o1", 0o1, Octal, "1", None);  in parse_octal()
118     check("0o6", 0o6, Octal, "6", None);  in parse_octal()
119     check("0o7", 0o7, Octal, "7", None);  in parse_octal()
120     check("0o17", 0o17, Octal, "17", None);  in parse_octal()
121     check("0o123", 0o123, Octal, "123", None);  in parse_octal()
122     check("0o7654321", 0o7654321, Octal, "7654321", None);  in parse_octal()
123     check("0o7_53_1", 0o7_53_1, Octal, "7_53_1", None);  in parse_octal()
124     check("0o66_", 0o66_, Octal, "66_", None);  in parse_octal()
126     check("0o755u16", 0o755u16, Octal, "755", Some(Ty::U16));  in parse_octal()
127     check("0o755i128", 0o755i128, Octal, "755", Some(Ty::I128));  in parse_octal()
168     check("0o_5", 5, Octal, "_5", None);  in starting_underscore()
169     check("0o_750u128", 0o_750u128, Octal, "_750", Some(Ty::U128));  in starting_underscore()