Class doesn't inherit

ido50 has asked for the wisdom of the Perl Monks concerning the following question:

Hi there!
I'm writing a CGI/Perl program, object-oriented style. I have a class, let's say it's called A::B. I also have an A::B::C class. I want A::B::C to inherit from A::B.
The A::B::C class looks like this:

package A::B::C;

use lib "$A::PATH/cgi-bin/A";
use A::B;
@ISA = qw/A::B/;
use strict;

bla bla bla...
[download]

Anyway, the A::B class has a new method, A::B::C doesn't. When I try to invoke the new method using the A::B::C class, I get a message that the new method cannot be located on that class. Why doesn't the A::B::C class inherit from A::B ??
Should mention both classes are modules.

Thanks,
Ido.

-------------------------
Live fat, die young

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Re: Class doesn't inherit by Anomynous Monk (Scribe) on Mar 17, 2004 at 19:48 UTC
Can you show how you are doing the use A::B::C and how you are calling new? And using strict and warnings is always a good thing.	[reply]
Re: Re: Class doesn't inherit by ido50 (Scribe) on Mar 17, 2004 at 19:56 UTC
Well, I got it, I didn't `use` A::B::C before calling the `new` method. Thanks for pointing my attention to it. ------------------------- Live fat, die young	[reply] [d/l] [select]
Re: Class doesn't inherit by etcshadow (Priest) on Mar 17, 2004 at 20:04 UTC
Another thing that may not be causing you trouble right now... but you should wrap your `@ISA` initialization in a `BEGIN` block. Otherwise you could unexpectadly run into trouble later (if you get a convoluted use order). `------------ :Wq Not an editor command: Wq` [download]	[reply] [d/l] [select]
Re: Re: Class doesn't inherit by chip (Curate) on Mar 18, 2004 at 01:47 UTC
insert obligatory reference to "use base" here -- Chip Salzenberg, Free-Floating Agent of Chaos	[reply]
Re: Re: Re: Class doesn't inherit by etcshadow (Priest) on Mar 18, 2004 at 02:22 UTC
Yes, absolutely, "use base" addresses this problem... when it works. Older versions of use base (like the version that come with 5.005_03, which is what I'm still stuck on) do not work properly, unfortunately. Granted, I'm not griping, because it looks like it's since been fixed... but also: `BEGIN { @ISA = qw( Foo Bar ) }` [download] is really not that hard, either. `------------ :Wq Not an editor command: Wq` [download]	[reply] [d/l] [select]
Re: Re: Class doesn't inherit by ido50 (Scribe) on Mar 17, 2004 at 20:24 UTC
Okay thanks. ------------------------- Live fat, die young	[reply]