132     check("0x0", 0x0, Hexadecimal, "0", None);  in parse_hexadecimal()
133     check("0x1", 0x1, Hexadecimal, "1", None);  in parse_hexadecimal()
134     check("0x9", 0x9, Hexadecimal, "9", None);  in parse_hexadecimal()
136     check("0xa", 0xa, Hexadecimal, "a", None);  in parse_hexadecimal()
137     check("0xf", 0xf, Hexadecimal, "f", None);  in parse_hexadecimal()
138     check("0x17", 0x17, Hexadecimal, "17", None);  in parse_hexadecimal()
139     check("0x1b", 0x1b, Hexadecimal, "1b", None);  in parse_hexadecimal()
140     check("0x123", 0x123, Hexadecimal, "123", None);  in parse_hexadecimal()
141     check("0xace", 0xace, Hexadecimal, "ace", None);  in parse_hexadecimal()
142     check("0xfdb971", 0xfdb971, Hexadecimal, "fdb971", None);  in parse_hexadecimal()
143     check("0xa_54_f", 0xa_54_f, Hexadecimal, "a_54_f", None);  in parse_hexadecimal()
144     check("0x6d_", 0x6d_, Hexadecimal, "6d_", None);  in parse_hexadecimal()
146     check("0xA", 0xA, Hexadecimal, "A", None);  in parse_hexadecimal()
147     check("0xF", 0xF, Hexadecimal, "F", None);  in parse_hexadecimal()
148     check("0x17", 0x17, Hexadecimal, "17", None);  in parse_hexadecimal()
149     check("0x1B", 0x1B, Hexadecimal, "1B", None);  in parse_hexadecimal()
150     check("0x123", 0x123, Hexadecimal, "123", None);  in parse_hexadecimal()
151     check("0xACE", 0xACE, Hexadecimal, "ACE", None);  in parse_hexadecimal()
152     check("0xFDB971", 0xFDB971, Hexadecimal, "FDB971", None);  in parse_hexadecimal()
153     check("0xA_54_F", 0xA_54_F, Hexadecimal, "A_54_F", None);  in parse_hexadecimal()
154     check("0x6D_", 0x6D_, Hexadecimal, "6D_", None);  in parse_hexadecimal()
156     check("0xFdB97a1", 0xFdB97a1, Hexadecimal, "FdB97a1", None);  in parse_hexadecimal()
157     check("0xfdB97A1", 0xfdB97A1, Hexadecimal, "fdB97A1", None);  in parse_hexadecimal()
159     check("0x40u16", 0x40u16, Hexadecimal, "40", Some(Ty::U16));  in parse_hexadecimal()
160     check("0xffi128", 0xffi128, Hexadecimal, "ff", Some(Ty::I128));  in parse_hexadecimal()
171     check("0x_c", 0xc, Hexadecimal, "_c", None);  in starting_underscore()
172     check("0x_cf3i8", 0x_cf3, Hexadecimal, "_cf3", Some(Ty::I8));  in starting_underscore()