> I think they're supposed to be both by perl thingie and by value. So:
>
> my $foo is const = 0 is true;
>
> $foo has the property const, while the value 0 in $foo has
> the property true.
So, if I do
my $foo is constant = new Counter(0);
$foo->increment # OK
my $bar = new Counter(0) is constant;
$bar->increment; #error
However, if I do
%foo is constant = (a=>1, b=>$foo);
are only the keys contant; or both the keys and values.
i.e. which of these is illegal
%foo{c} = 1; # error
%foo{a} = 2; # probably error, but it would be nice
# to have a form of hash-constness that
# locks only the keys
$foo{b}->increment; # OK
Dave.
