next does not a loop make.

The error is pretty clear, I think. You don't have a loop, so you can't next. You need to create a loop, like below. Note that you didn't have any checking for odd conditions, such as $key and $self->{FIRSTKEY} never matching. Thus, you could have run off the end of @KEYS (which I assume you define elsewhere), creating an infinite loop and lots of warnings about undefined values. 

sub NEXTKEY {
  my $self    = shift;
  #my $lastkey = shift;  # Do you need this?  If not, don't bother shi
+fting it

  until($self->{FIRSTKEY} eq $KEYS[$self->{INDEX}]) {
    ++$self->{INDEX};
    last if $self->{INDEX} >= $#KEYS;  # Quit if we run out of @KEYS
  }

  return($KEYS[$self->{INDEX}]);
}

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PS, you should probably wrap any code you post here in <CODE> </CODE> tags, so that any special characters, like <, >, [, and ] are properly escaped.

bbfu
Black flowers blossum
Fearless on my breath

In reply to (bbfu) Re: Can't "next" outside a loop block by bbfu
in thread Can't "next" outside a loop block by hbradshaw

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