Cumulative
Nick Sabalausky
SeeWebsiteToContactMe at semitwist.com
Mon Feb 24 16:01:25 PST 2014
On 2/24/2014 3:41 AM, Steve Teale wrote:
>
> extend void foo() // Declared in base class as cumulative void foo()
> {
> (cast(BaseClass) this).foo(); // Compiler does this for you
> // similar to changing a light bulb ;=)
>
> // the extra stuff
> }
>
> I think also that it might be necessary for the base class function to
> return on behalf of the derived method as opposed to to it.
>
> Does this make any sense?
>
I've often wished for something like that when working on OO-heavy
stuff. Some virtual funcs are intended to always be called by all
overriding functions, but without a way to enforce that, it becomes a
scary error-prone choice of API design. And trying to design your way
around that limitation can be a pain.
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