On Jun 27, 2012, at 12:39 PM, Kieron Hardy wrote:
> Thanks Danny, that's a step in the direction I wanted to go.
>
> But on further reflection, I think what I was looking for (i.e. have some
> class that stops it's own instantiation and defers to another class depending
> on some parameter value(s)) doesn't really make sense. Instead I need some
> sort of factory function that contains the conditionals and that returns an
> instance of the right class.
>
> Cheers,
>
> Kieron
That's the correct way to parameterize instantiation, but Danny's conditional
will play a role there:
(define (factory x)
(new (if (is-this-tuesday?) class-for-tuesday class-for-all-other-days)
[time x]))
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