Numbers

Int

Int = hexadecimal_number
    | octal_number
    | binary_number
    | decimal_number

hexadecimal_number = "0", ("x" | "X"), hexadecimal_digit+
octal_number       = "0", ("o" | "O"), octal_digit+
binary_number      = "0", ("b" | "B"), binary_digit+
decimal_number     = "1".."9", decimal_digit*

12345
01234   // This is an error, a decimal number cant have
      // leading zeroes
0o755   // This is octal
0b0110
0xff25
0xFfaAthp

TODO: Allow underscores _ between any number: 1_000_000.

Float

Float = decimal_digit+, ".", decimal_digit+, scientific_notation?
      | decimal_digit+, scientific_notation

scientific_notation = "e", ("+" | "-"), decimal_digit+

123.456
123.456e+4
123.456e-2

123e+10
123e-3thp

All floating point numbers must start with at least 1 digit. .5 is not a valid floating point number.

TODO: Allow scientific notation to omit the +/-: 10e4.