Re: regexp NOT matching an extension

[Oliver Scholz]

"Leo" <leo.broska@NOSPAM.isys.com.au> writes:

> hi there
>
> in dired-omit-files i need a regexp matching all files without the extension
> '.pem'.
>
> i tried
>     [^.][^p][^e][^m]$
> but it doesn't work. however a one-char-negation like
>     [^m]$
> works.
>
> any idea?
>
> thanks, leo

"\\(?:[^.]...\\|\\.[^p]..\\|\\.p[^e].\\|\\.pe[^m]\\)$"


[as an aside note to a recent related thread: I think this is still
not what Perl users would expect according to
<84isogutgt.fsf@slowfox.is.informatik.uni-duisburg.de>, since it
simply matches any four character sequence not identical to
".pem". However, I start to wonder whether x\\(!:top\\)y is actually
still a _regular_ and not rather a _context free_ expression.]

    Oliver
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