I don't want to have to resort to
/([^s][^t][^r][^i][^n][^g])/
though that does work.
Effectively, I need to be able to implement
/(?:(?:regexp1){0}[^-0-9])(regexp2)\D/
to basically match regexp2 as long as it is present and regexp1 is NOT.
So, how to do
/(regexp){0}/
?
You need a zero-width negative look-behind assertion from the extended patterns. Example:
$ cat /tmp/test.txt
This should be matched.
This should not be matched.
$ perl -ne 'print if /(?<!not\s)be/;' /tmp/test.txt
This should be matched.
$
That's what I get for not reading the entire perlre doc. 