My only comment is to purvey the methods as functions, which is what I do in most of my tie-related modules: 
package Tie::Array::LastIndex;

# ...

use Carp 'croak';
use Exporter;
@EXPORT = qw( which what );

# ...

sub which (\@) {
  my $aref = shift;
  my $obj = tied @$aref;
  croak "which() only accepts arrays tied to " . __PACKAGE__
    unless $obj and $obj->isa(__PACKAGE__);
  return $obj->{INDEX};
}

sub what (\@) {
  my $aref = shift;
  my $obj = tied @$aref;
  croak "what() only accepts arrays tied to " . __PACKAGE__
    unless $obj and $obj->isa(__PACKAGE__);
  return $obj->{ARRAY}[ $obj->{INDEX} ];
}

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Like so.
_____________________________________________________
Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re: Tied array to track last-accessed element by japhy
in thread Tied array to track last-accessed element by davido

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