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Postings from January 2000
Re: On Pseudohashes
From:
Tim Bunce
Date:
January 17, 2000 05:46
Subject:
Re: On Pseudohashes
Message ID:
20000117134432.I12453@ig.co.uk
On Mon, Jan 17, 2000 at 06:30:46AM -0700, Tom Christiansen wrote:
>
> I'm not sure, but I think I was just worried about figuring out
> whether a particular assignment was legal:
>
> my Dog $spot = frobnicate();
>
> But that doesn't matter. All you care about is whether the methods
> invoked against whatever happens at run time to have taken up
> residence in the $spot variable. So long as that class's @ISA and
> package symbol table are populated at compile-time with the same
> data as they'll ever hold at run-time, you could do the check.
> Likewise recursively for parent classes.
>
> The presence of an AUTOLOAD anywhere in the graph seems to make
> compile-time validation pointless.
It's always been advisable for classes to pre-declare all their methods
if using AUTOLOAD.
Tim.