Does grouping work inside a Perl regex character class?

Question

consider the following code:

perl -wne 'chomp;print if m/[^(?:test)]/'

I was surprised to see that grouping inside a character class works, How does this differ from (?!pattern)?

Answer 1

/[^(?:test)]/

is not grouping within the char class. All the char listed in the [ ] after ^ will be treated literally and this will match any string that contains char other than ( ? : t e s t )