I suggest studying "A Regular Expression Matcher" by Rob Pike: https://www.cs.princeton.edu/courses/archive/spr09/cos333/beautiful.html https://www.cs.princeto

I suggest studying "A Regular Expression Matcher" by Rob Pike: https://www.cs.princeton.edu/courses/archive/spr09/cos333/beautiful.html https://www.cs.princeton.edu/courses/archive/spr09/cos333/be...