Re: Re: Re: Re: Instance field access from private methods

I think you have shown me what I'm doing wrong here. Inside of your printGoodBye method, you call printWorld() w/ $self as the invocant whereas I had always been calling that method without any invocant at all. Heh, java rears it's ugly head :)

This must be what robartes meant when he wrote: "...it is a good idea that even your private methods use the class' public accessor methods to get at private instance attributes."

Excellent, excellent.

Now, I'm still not too sure about a subroutine being required to recieve a copy of the invocant in order for it to be classified as a method and thus inheritable. You are right that printGoodBye() recieves the invocant, but printWorld() does not (or else there would be a HASH=... after "World" in the output). However, printWorld is still inherited from C1 by C2.

So, chances are, I'm thinking about this in java-world and being stupid again. But, my original question has been answered, so thanks, guha.

Mark

Comment on Re: Re: Re: Re: Instance field access from private methods

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Re: Re: Re: Re: Re: Instance field access from private methods by perrin (Chancellor) on Oct 23, 2002 at 21:31 UTC
The reason printWorld is not printing "HASH=" is that you are calling it incorrectly. You're invoking it as a subroutine, not as a method, so it is not inherited at all; it just happens to be in the same package as printGoodBye. The correct way to call it is to use the version of printGoodBye in guha's post, which uses `$self->printWorld()` instead.	[reply] [d/l]
Re: ^5 Instance field access from private methods by guha (Priest) on Oct 23, 2002 at 21:39 UTC
Well I think the thing is that you invoke printGoodBye as subroutine with no argument, so in your example nothing should be printed If you would for some reason put `printGoodBye(@_); # instead` [download] you would see the HASH-stuff However I think that in order for inheritance to work, the "hash" or instance or ... needs to be BLESSED to some package The reason it seems to work is that printWorld and printGoodBye are defined in the same package.	[reply] [d/l]