Front page | perl.perl6.language |
Postings from February 2001
James Mastros <james@rtweb.net> wrote:
> The idea is [for Larry] to declare "no, it isn't". Otherwise, you have to
> do refcounting (or somthing like it) for DESTROY to get called at the right
> time if the class (or any superclass) has an AUTOLOAD, which is expensive.
I'm coming in halfway through a thread, which is always dangerous, but...
the above seems to imply a discussion that you only need to do expensive
ref-counting (or whatever) on objects which have a DESTROY method.
However, since you dont know in advance what class(es), if any, a thinngy
will be blessed as, you always have to ref-count (or whatever technique is
chosen) just to be sure:
my $h = {}; $ref1 = \$h; $ref2= \$h; ...
# we havent been ref-counting because $h is isnt an object.
bless $h, some_class_with_a_destroy_method;
# whoops, $h now needs to be properly managed. Anyone remember
# what's pointed at it ???