Here I tie $_ to a Complainer package that can warn/carp/croak any time something tries to assign to it.
#!perl -l
package Complainer;
use Tie::Scalar;
use base Tie::StdScalar;
use Carp;
sub STORE {
# Warn out any status info you want here.
carp "Tried to assign to \$_";
}
sub FETCH { $_ }
package main;
tie $_, Complainer;
$_ = 1;
local $_;
Update: Added the fetch method so that reading $_ actually works. not sure why I have to do that, Tie::StdScalar should handle that for me... but this was written in a hurry.
Ted Young
($$<<$$=>$$<=>$$<=$$>>$$) always returns 1. :-)
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