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#!/usr/bin/perl
use strict;
use warnings;
use lib qw<blib/arch blib/lib>;
use Variable::Magic qw<wizard cast dispell>;
sub foo { print STDERR "got ${$_[0]}!\n" }
my $bar = sub { ++${$_[0]}; print STDERR "now set to ${$_[0]}!\n"; };
my $a = 1;
{
my $wiz = wizard get => \&foo,
set => $bar,
free => sub { print STDERR "deleted!\n"; };
cast $a, $wiz, qw<a b c>;
++$a; # "got 1!", "now set to 3!"
dispell $a, $wiz;
cast $a, $wiz;
my $b = 123;
cast $b, $wiz;
} # "deleted!"
my $b = $a; # "got 3!"
$a = 3; # "now set to 4!"
$b = 3; # (nothing)