From: Daniel Berger <djberg96@...>
Date: 2007-06-25T12:08:11+09:00
Subject: Re: alias and subclasses

Tim Clark wrote:
> Hi everyone,
> 
> The quick version:
> Is there a Ruby-ian way to get the alias method to propagate through 
> subclasses?
> 
> The longer one:
> I've got two classes with some simple inheritance:
> 
> class Ticket
>     def unreserve
>         ...
>     end
>     alias unhold unreserve
> end
> 
> class FamilyTicket < Ticket
>     def unreserve
>         ...
>     end
> end
> 
> FamilyTicket adds a bit of functionality to Ticket, and are reserved in 
> different ways, so it's unreserve method overwrites its parent class.  I 
> would still like to use the aliased method name - e.g.
>     ft = FamilyTicket.new
>     ft.unhold
> 
> However, the alias refers to Ticket#unreserve, not 
> FamilyTicket#unreserve.  From the docs I understand that this is by 
> design, so my question is, is there a more Ruby-like way of doing the 
> following?
> class Ticket
>     def unreserve
>         ...
>     end
> 
>     def unhold
>         unreserve
>     end
> end

Alias it again?

I talk about this topic (for monkey patching, but it would apply to 
subclassing as well) at http://djberg96.livejournal.com/97738.html if 
anyone is interested.

Regards,

Dan