Re: what is the regular expression that matches nothing? -- I think it is the null expression. When I do "egrep '' somefile" the result is the same as when I do "cat somefile". The result of "egrep -v '' somefile" is, as expected, nothing. HTH

[Randy Yates]

Then this is the regular expression that matches *everything*. I'm
looking for the opposite. I tried using the complement operator
("[^...]") but it appears to only operate on arguments inside the
brackets.

By the way, a regular expression is a regular expression is a regular
expression. If it works for grep, it should work for xemacs.

--RY

me <me@privacy.net> writes:

> Randy Yates wrote:
>> For use in the xemacs package "efs."
>
> Ah! Sorry, I didn't notice this part.
> I don't know xemacs.
>

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