One reason (maybe the only reason) that the stringization of a  qr// object comes wrapped in its own little non-capturing group is so that the further interpolation of something like 

my $rx = qr{ ... }xms;
my $ry = qr{ ... }xms;
my $rz = qr{ ... }xms;

if ($string =~ m{ \A $rx* $ry+ $rz{2,5} \z }xms) {
    ...
    }

[download]
can work intuitively — even the  $rz{2,5} bit, surprisingly, although you can only push that one so far.

This node notwithstanding, what would one gain in the long run from a "simplified" form for the example given? How often does one build a regex in this way and then try to read it?

Give a man a fish:  <%-{-{-{-<

In reply to Re: Tidying and simplifying a regular expression by AnomalousMonk
in thread Tidying and simplifying a regular expression by Dallaylaen

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