Verbal-Exprejon: Regexes without any regex

The Common Lisp regex library cl-ppcre has had this as a feature for a long time. The library uses a sexp-based format for regexes, but you can also use plain regex if you want. When you pass a plain regex to it, it will always parse it into the sexp form first. This gives you the benefit of both the compact standard regex form as well as the more readable sexp forms at the same time. For example:

    (cl-ppcre:parse-string "(?<!\\w)([*_])(.+?)\\1(?!\\w)")

Gives the following:

    (:SEQUENCE
      (:NEGATIVE-LOOKBEHIND :WORD-CHAR-CLASS)
      (:REGISTER (:CHAR-CLASS #\* #\_))
      (:REGISTER (:NON-GREEDY-REPETITION 1 NIL :EVERYTHING)) 
      (:BACK-REFERENCE 1)
      (:NEGATIVE-LOOKAHEAD :WORD-CHAR-CLASS))

This may look complicated, but it has to be in order to be able to fully cover all features of standard regex. I would like to see how complex regexes like this is represented using Verbal library.

Here's mine in Scala: https://github.com/pathikrit/ScalaVerbalExpressions