|Don't ask to ask, just ask|
Re: Regexp substitution using variablesby kcott (Bishop)
|on Nov 25, 2020 at 22:11 UTC||Need Help??|
About 15 or 20 years ago, I read a book by Damian Conway called "Object Oriented Perl". In it, he shows the creation of blessed objects using various things including regular expressions: your post reminded me of this.
I don't own the book. If you can get a copy (you possibly already own one) it's certainly worth reading even though it's now quite old. If you follow the link I provided, you'll see a free PDF copy is offered; however, it looks like you need to "add to cart" which probably also means you have to "create an account" — I didn't follow through on this.
Here's a very quick-and-dirty implementation of a class which blesses regular expressions.
If you want to use something like this in production code, it'll need a lot more work. What I've provided is only intended to demonstrate the basic principles involved. The book would probably provide a lot more information; but I don't remember details of something I read about two decades ago.
Here's a test of that module:
Unrelated but important: Please avoid indirect object syntax; e.g. new Regexp($pattern). See "perlobj: Indirect Object Syntax" for a discussion of problems with this syntax. The above example would be much better as Regexp::->new($pattern) — "perlobj: Invoking Class Methods" explains that.
P.S. When checking links prior to posting, I noticed "PDF for FREE" has been replaced with the text, "pBook + PDF". I don't know what that means and whether the PDF is still free or not (there would have only been a matter of minutes between finding the link in the first place and checking I had correctly included it in my post).