hex_bytenum = ('0x' | '0X') hexdigit+ 'u8';
bin_bytenum = ('0b' | '0B') bindigit+ 'u8';
oct_bytenum = ('0o' | '0O') octdigit+ 'u8';
hex_bytenum = ('0x' | '0X') hexdigit+ 'u8';
bin_bytenum = ('0b' | '0B') bindigit+ 'u8';
oct_bytenum = ('0o' | '0O') octdigit+ 'u8';