The easiest way to get around precedence-issues is to define precedence yourself by using (a lot of) brackets. So 

unless (! $args =~ /\-rs(\s+)(\S+)/ && ! $args =~ /\-p(\s+)(\S+)/ && !
+ $args =~ /\-P(\s+)(\S+)/) {

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will become 
unless ((!($args =~ /\-rs(\s+)(\S+)/)) && (!($args =~ /\-p(\s+)(\S+)/)
+) && (!($args =~ /\-P(\s+)(\S+)/))) {

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I agree it looks a bit confusing, but modern editors help you by showing the matching bracket. And you don't have to think about rules (which might be counter-intuitive (like ! vs =~) or different in other programming languages).

HTH, Rata

In reply to Re^2: regex return true instead of false (precedence) by Ratazong
in thread regex return true instead of false by ovedpo15

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