my $match = "(?<=module )$ARGV[2].*?([\\(;])";
print "$match";

my $filename = $ARGV[0];

open (INFILE, "<", $filename)  or  die "Failed to read file $filename : $! \n";

$string =  <INFILE>;
close INFILE;

$string =~ s/$match/$ARGV[1]$1/sg;
print "$1";