From: Bob Gustafson <bobgus@...>
Date: 2001-11-11T15:43:50+09:00
Subject: [ruby-talk:24860] Re: Help needed on subclassing

>Its late here in Sweden (actually early, but anyway... ;-)) and I cant
>find an elegant way to from class M subclass class T so that in
>the subclass some (but not all) of the arguments for T.new are specified.
>
>Example:
> T is class with T.new(a,b,c)
> M.[] needs to return a subclass of T (lets call it S) so that calls
>       S.new(c) are translated to T.new(am,bm,c).
>
>Ok, you can use evals but I'd call that cheating.
>
>Please help me; my brain and screen are hazy! ;-)
>
>/Robert

Why not do

def T.new(a=defaulta,b=defaultb,c=defaultc)

Except that you probably need to put the c first

def T.new(c=defaultc, a=defaulta,b=defaultb)

I haven't tried it. Late here in Chicago now too..

BobG