__class_init

Define the attributes required for the class.

Octal escapes consist of one, two, or three octal digits

Hexadecimal escapes consist of an x, followed by any number of hexadecimal digits. However, only the last two are used.

Unicode escapes consist of an u, followed by one to four hexadecimal digits.

interpret

Get the value of the const.

compile

Generate PIR code which can be used to generate our value