[tpm] Modification of a read-only value

[Shaun Fryer]

I'm curious why a scalar reference is considered a read-only value?

$ perl -le 'my $x = \"0"; $$x++; print $$x'
Modification of a read-only value attempted at -e line 1.

$ perl -le 'my $x = {x=> 0}; $x->{x}++; print $x->{x}'
1

Is there an easy way to update a simple scalar ref without having to
use an array or hash ref instead?

Fyi... This is perl, v5.10.0 built for i486-linux-gnu-thread-multi
--
Shaun Fryer