> (famously) there is no regex to detect balanced parentheses God, I remember running into this wall with an in-company domain-specific language that used rege

> (famously) there is no regex to detect balanced parentheses God, I remember running into this wall with an in-company domain-specific language that used regex as its tokenizer/parser. Adding support for nested structures required us to untangle the whole thing and rewrite the regex into explicit algorithms. Fortunately the regex was only a few pages long.. In short, I agree with you that regex cannot parse regular expressions completely. Would be happy to be proven wrong, though!