How can I match anything-except-a-regex inside a Perl regular expression?
The short answer is that negated regular expressions are not directly supported in Perl, and adding them would be a hard problem. If we take the string “bar” as an example then the negated regex will look something like “[^b]|b[^a]|ba[^r]”, and so it isn’t supported. One option to workaround this problem is to make a smart use of the !~ operator, by matching a string and then using this operator to check if it doesn’t match a regular expression.
