Re: [Module::Build] version.pm and version number comparison problem

[Chris D. <ch...@cl...>]

On Feb 2, 2006, at 10:26 PM, Ken Williams wrote:

> On Feb 2, 2006, at 10:18 PM, Chris Dolan wrote:
>> Well, if it throws an exception, it's probably not a version  
>> instance, right?
>
> Why not?  It could be a version instance that overloads isa() for  
> whatever satanic purpose it wants to, and throws an exception,  
> because it's evil and it can.

I don't think version.pm is actually in league with the devil. :-)   
Presumably, version would only override isa() if it really, really  
needed to be overridden.  Why should we ignore that decision that was  
probably made with great care?

> What I really want to know, and what UNIVERSAL::isa() tells me, is  
> whether there's an @ISA-chain up to 'version'.

No, that's not right.  What you want to know is if the $version is  
not a plain scalar and therefore whether it needs to be numify()ed.   
isa('version') is a close proxy for that decision.

Sorry to drag this out -- I know you already abstained, Ken -- but it  
took *me* a long time to grasp this through a series of emails with  
nothingmuch, so I felt that I should share.

Chris
-- 
Chris Dolan, Software Developer, Clotho Advanced Media Inc.
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