the last chunk isn't read at all

eh? That shouldn't be. Perl returns whatever's after the last $/.

hope that there's a nice and clean way [...] without any ugly corrective code.

I don't know if you'll consider the following "nice and clean", but at least there's no "ugly corrective code" (or any corrective code at all) in the following. It employs a single-line lookahead.

(Update: I've replaced the code I had here originally with a version that hides the guts in an iterator. It's longer, but the usage is much simpler.)

Usage: 

my $rec_reader = make_rec_reader('myrecordsep');
while (my $rec = $rec_reader->($fh)) {
   print("Record\n");
   print("======\n");
   print "$_\n" for @$rec;
   print("\n");
}

[download]

Guts: 

sub make_rec_reader {
   my ($sep) = @_;

   my $first = 1;
   my $line;

   my @rec;

   return sub {
      my ($fh) = @_;

      # Skip what's before first record.
      if ($first) {
         $first = 0;
         for (;;) {
            $line = <$fh>;
            last if not defined $line;
            chomp($line);
            last if $line eq $sep;
         }
      }

      while (defined($line)) {
         my @rec;

         for (;;) {
            push @rec, $line;
            $line = <$fh>;
            last if not defined $line;
            chomp($line);
            last if $line eq $sep;
         }

         return \@rec;
      }
   };
}

[download]

In reply to Re: Change the behavior of Perl's IRS by ikegami
in thread Change the behavior of Perl's IRS by LighthouseJ

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