[fpc-pascal] Re: double dispatch

Marco van de Voort marcov at stack.nl
Sat Mar 19 16:17:06 CET 2011

In our previous episode, leledumbo said:
> > No, because overloading works the same as in C++ (determined statically at
> compile time).
> Are you sure, Jonas? Because I've been able to implement visitor pattern
> which is a kind of double dispatch. Of course it's not implemented like the
> example posted by the OP, but more like a simulation explained in 
> http://en.wikipedia.org/wiki/Double_dispatch wikipedia .

That is purely statically typed based overloading as far as I can see, and
doesn't switch methods at runtime.

The only escape that I know to statically typed calling in FPC is IDispatch.

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