Re: Re^2: subclass discovery at runtime

Very true; in fact I've had very little success while experimenting with my own suggestion!

It seems that UNIVERSAL::isa is not doing at all what I'm expecting it to do...

print UNIVERSAL::isa('SubClass','SuperClass') ? 'true' : 'false';

package SuperClass;
package SubClass;
use vars qw(@ISA);
@ISA=qw(SuperClass);
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Seems to print false! Does this mean 'isa' only works on objects? Not on class-names?

I feel like a noob... I'd consider doing a '--' on my own original post, if I could...

Update: Aristotle got me on track again... Temporary insanity resolved

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Re^4: subclass discovery at runtime by Aristotle (Chancellor) on Jan 27, 2003 at 17:40 UTC
Are you doing it in that order? Because the `@ISA = qw(SuperClass);` only happens at runtime, and by the time the print executes you haven't yet arrived at it. Wrap it in `BEGIN {}` and it will work. Makeshifts last the longest.	[reply]
Re: Re^4: subclass discovery at runtime by Gilimanjaro (Hermit) on Jan 27, 2003 at 18:11 UTC
Yep... You're right... I just figured that out... Discovered an issue with recursing thru the namespace too; seems there's a 'main::main::' entry, which causes infinite recursion, so you'd need to keep track of what namespaces you've checked...	[reply]
Re^6: subclass discovery at runtime by Aristotle (Chancellor) on Jan 27, 2003 at 23:00 UTC
Sort of. There's a `main::` in every package; just skip that entry and you'll be fine. Makeshifts last the longest.	[reply]
Re: Re^6: subclass discovery at runtime by Gilimanjaro (Hermit) on Jan 27, 2003 at 23:31 UTC