Michael G Schwern <[EMAIL PROTECTED]> writes:
> On Mon, Dec 17, 2001 at 08:12:43AM +0000, Piers Cawley wrote:
>> >> What's wrong with
>> >>
>> >> ok ( eval { $foo->isa('Foo') } );
>> >>
>> >> or even:
>> >>
>> >> ok (eval { ref($foo) && $foo->isa('Foo') });
>> >
>> > As Kurt already pointed out, you can do:
>> >
>> > ok( UNIVERSAL::isa($foo, 'Foo') );
>> >
>> > but if it fails you have no idea what $foo was.
>>
>> No you can't. Not if you've overridden isa anywhere. (Which is
>> perfectly possible.)
>
> Ooooh, hadn't thought about that. I've done it myself a few times (to
> make a delegation look like inheritance). Now I have to go fix
> Test::More to deal with it. Ya know, I was literally just about to
> release 0.40 and I HAD to go read my email first.
>
> Either way, your above ok() solutions still give you no failure
> diagnostics, which is the whole point.
Well, yes. At least the point about overridden isa didn't get lost...
--
Piers
"It is a truth universally acknowledged that a language in
possession of a rich syntax must be in need of a rewrite."
-- Jane Austen?
