Hi Monks

It is difficult to explain in words (I do not know English very well),
here is the code: 
open (my $file, '<', 'data.bin');
binmode $file;
my $binary_data = <$file>;
$binary_data =~ /(.)(.){$1}/; # how can I do something like that?
#or better yet
$binary_data =~ /(.)(.){(?{unpack 'H*', $1})}/; # ?
# or may be
/(.)(?{unpack 'H*', $1})(.){$^R}/; # ???

[download]
I would like to perform such a trick in regular expression. Possible?

Update

There is a solution (help my friend): 
/(.)((??{'.' x $1}))/;

[download]
but, how I can in this example, assign values to three different groups? 
$_ = "3aaaa\nbbbb\nccccc\nddddd";
/(\d)((??{'.*?\n' x $1}))/;
print $2; # aaaa\nbbbb\nccccc\n
# how to assign a value aaaa\n of $3, bbbb\n -> $4 etc ?

[download]
There are other solutions?

In reply to Regular expressions: interpolate the variable in the value of the number of repetitions for the group by 0day

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