Re: attr initializers (Class::MOP and Moose)

Ricardo,

On Feb 6, 2008, at 4:00 PM, Ricardo SIGNES wrote:
> * Stevan Little <[email protected]> [2008-02-06T15:34:54]
>> On Feb 6, 2008, at 12:18 PM, Ricardo SIGNES wrote:
>>> The initializer may be a coderef or a method name (referring to a  
>>> method
>>> on the
>>> instance.)  It's called like this:
>>>
>>>   $instance->$initializer($value, $name, $callback);
>>
>> What is $name for again?
>
> It's the attribute name.  This lets you have one initializer for  
> multiple
> attributes.  If my contrived example in tests wasn't so contrived  
> I'd say you
> could use it and do this:
>
>   my %mult_for = (foo => 2, bar => 3);
>   my $multer = sub { $_[3]->($value * $mult_for{$_[2]} };
>   has foo => (initializer => $multer);
>   has bar => (initializer => $multer);
>
> I am not strongly attached to passing that in.

I can see some use for it, but not that much. Perhaps it should be  
($value, $callback, $attribute_meta_object) ? This would allow for  
all sorts of advanced usage, but it could also be safely ignored by  
those who dont want/need it.

- Stevan