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Re:Show HN: Regular expression compilation visualized by abecedarius on Tuesday March 23, 2021 @01:13PM (#26557400)
Intersection and complement are both expressible in regular expressions (in the CS sense). Is that not what you mean by impossible to support?

(I'm too lazy to look up what the other listed notations mean.)

Re:Show HN: Regular expression compilation visualized by bmn__ on Tuesday March 23, 2021 @04:22PM (#26559939)
> Is that not what you mean

no, I mean generic line boundary