| Newsgroups |
gmane.editors.sed.user |
| Message-ID |
<[email protected]> |
On Thu, 14 Aug 2014 23:01:57 +0200, "[email protected] [sed-users]"
<[email protected]> wrote:
> Hello,
>
> I've read a difficult problem:
> a RegEx, that matches a string, which doesn't include a 2nd string.
> foo-xxx--bar -> no match
> foo-xyx--bar -> match
> It should match, if "foo.+?bar" doesn't contain "xx", something like
> "foo.+(?!xx)bar", but that matches always.
The best you can do in sed is to check that there is a match for (as an
example) foo-...-bar and if so, check that there is no match for whatever
you want to exclude.
ISTR that some there are plans to add PCRE support to GNU sed, so at some
point you may be able to do it with a single regex in sed too.
But for the time being, use perl. Seriously.
--
D.