On Sun, May 16, 2021 at 8:55 AM Nicolas Goaziou <m...@nicolasgoaziou.fr> wrote:
> Oh my! You're reviving a 6 years old thread[ยน]! 6 years in the TeX world is the blink of an eye! > ... we can put the burden of the user's shoulders. > > So... let's get liberal and say a key must match: > > (rx "@" (one-or-more (any word "-.:?!`'/*@+|()<>&_^$#%&~"))) > > Nothing bad could happen, right? Probably not. As you say, you can put the burden on the user, and can always tighten it later if something comes up. Bruce
