this post was submitted on 24 Jul 2024
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[โ€“] alexandra_kollontai@hexbear.net 4 points 2 months ago (1 children)

you can match regex with regex too

You can't because the regular languages cannot describe properly nested parentheses.

[โ€“] PaX@hexbear.net 2 points 2 months ago* (last edited 2 months ago)

I should not have said that, I'm sorry I was really tired, but I think it's also more complicated than no

Many implementations of "regular expressions" are actually capable of describing more than regular languages

Like Perl/PCRE's regular expression parser (which I used to write the above regexes) is capable of recursive evaluation and backreferences and probably other stuff I don't know about cuz I don't use it very often

I don't actually know if you can or not but yeah

Tbh, you probably know more about formal language theory than me blob-no-thoughts