Re: [External] : Use the characters "+" and "-" in regular expressions

[tomas]

On Thu, May 20, 2021 at 11:42:58AM +0200, steve-humphreys@gmx.com wrote:
> I have now used ";; [;+-.]+" to match some specific lines.
> 
> (string-match ";; [;+-.]+" s")
                       ^ NOOOO!

This is a dash in the middle, indicating a range (i.e. "match all
characters in the range "+" to "."). In ASCII (and by extension,
in UTF-8), these are "+", ",", "-" and ".".

So this will match...

  (string-match "[+-.]" "Folks, let's go!")
  => 5

... the comma!

This is the whole discussion we've had just yesterday and today.
I'm a bit confused: you seem to have ignored it totally.

> How could I negate the regexp that I have defined?

I don't even know what you mean by "negating a regexp".

Cheers
 - t

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