And then there is the always useful (if ever-homely): 
>perl -wMstrict -le
"use constant RX => qr{ [atc]{3} }xms;
 my $s = 'the cat in the hat';
 print qq{found a $1} if $s =~ m{ ( @{[ RX ]} ) }xms;
"
found a cat

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In reply to Re^2: calling subroutines within a regular expression? by AnomalousMonk
in thread calling subroutines within a regular expression? by Anonymous Monk

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