There's at least a potential hazard in this approach: what if your parent constructor does parameter checking, and is more restrictive than your subclass? Then the above would be dangerous -- you'd lose the values in %params -- and you'd want to do something like:
my ($class, $whatever) = @_;
my %params = (); # new params to use instead of parent's params
my $this = new base_class; # create a new parent, and
# let it set its own defaults
# clobber the base_class' defaults:
while (my ($k,$v) = each %params) {
$this->{$k} = $v;
}
bless($this, $class); # re-bless into the current package
Ugly and hypothetical, but something to be aware of.
On second thought, better still: always make any parameter checking in the constructors throw
a fatal error. Note such errors in development and change the parent's constructor to play nice.
-- Frag.
--
"It's beat time, it's hop time, it's monk time!"
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