I managed to get the folowing to work ok ...

my $req = bool_to_regexp($ARGV[0]);
print "using '$req' ...\n";

open (FILE, "stuff") || die "$!";
while(<FILE>) {
  if (eval($req)) {
    print $_;
  }
}
close FILE;
[download]

... so ...
    The eval was the right choice, but eval if ($req) runs the code in $req only is it works (which it won't be because it is not run ... vicious cycle)

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_{can't sleep clowns will eat me}
-- MZSanford