Nowhere?

From your description it doesn't sound special :) sounds like 

 while( $$ref =~ m{^(.*$)$}gsm ){
   my $line = $1;
   ...
}

[download]
and IMHO that doesn't need a module

OTOH see See Simple Module Tutorial and Modern Perl and Re^2: Write to existing file with character insert

In reply to Re: Where to put self-made loop logic (separate module)? by Anonymous Monk
in thread Where to put self-made loop logic (separate module)? by basic6

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