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This queue is for tickets about the Class-Std CPAN distribution.

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The Basics
Id: 15427
Status: rejected
Priority: 0/
Queue: Class-Std
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Owner: Nobody in particular
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Bug Information
Severity: (no value)
Broken in: (no value)
Fixed in: (no value)

History Show all quoted text
  Mon Oct 31 13:59:34 2005 Guest - Ticket created
Class::Std v0.0.4, upon perl 5.8.4, Linux Sorry, last one (I hope). I'm only reporting this because in the PBP, you talk about building an API that behaves like one would expect. If one uses the "init_arg" tag, that attribute becomes required at instantiation. I would expect it to be optional. If not supplied that attribute is undefined. Instead, I'm forced to do: my %name : ATTR( :init_arg<name> :get<name> :default<undef> ); To make the attribute optional. Thanks Jay
  Tue Nov 01 16:48:33 2005 damian [...] conway.org - Correspondence added
Date: Tue, 01 Nov 2005 11:56:27 -0500
To: bug-Class-Std [...] rt.cpan.org
Subject: Re: [cpan #15427]
From: Damian Conway <thoughtstream [...] gmail.com>
RT-Send-Cc:
Show quoted text
> Sorry, last one (I hope). I'm only reporting this because in the PBP, > you talk about building an API that behaves like one would expect.
Yes, but I also talk about not allowing variables to go uninitialized. Show quoted text
> If one uses the "init_arg" tag, that attribute becomes required at instantiation. > I would expect it to be optional. If not supplied that attribute is undefined.
I consciously chose to make such arguments required, so the user is... Show quoted text
>...forced to do: > > my %name : ATTR( :init_arg<name> :get<name> :default<undef> ); >
In other words if you specify that an attribute can be initialized, I want you to be explicit about what should happen if it isn't. I can certainly see your point about expectations, but that convenience has to be balanced with the desirability of being explicit about default behaviours. I chose to require explicitness (because I believe that improves the robustness of the resulting code). All the best, Damian
  Tue Mar 25 23:11:56 2008 dmuey [...] cpan.org - Subject changed from (no value) to 'closed: init_arg required (by design)'
  Tue Mar 25 23:11:56 2008 dmuey [...] cpan.org - Status changed from 'new' to 'rejected'