Tiny regex-like library, supports basic regex syntax like ^ $ * and +. Also a non-standard negating syntax using the ~ character prefix. Some printf-inspired character classes are also supported, they are:
- %a Alphabetic
- %d Digits
- %f Floating point, 0-9 and period
- %g Graphical
- %n Newlines and carriage returns
- %s Whitespace
- %x Hexadecimal, 0-9 and A-F
- %? Anything