Re^3: Reverse engineering regular expressions

[CountZero]

This is a duplicate of my answer to Parse::RandGen::Regexp

As the qr// method runs in interpolative context one can do

use strict;
my $match='test';
my $regex_match=qr/$match/i;
my $test_value='This is a Test';
print 'It matches' if $test_value=~m/$regex_match/;