Re: [boost] Re: MultiMethod/Visitor Interest

From: Lassi A.Tuura (lassi.tuura_at_[hidden])
Date: 2004-09-30 03:46:04

> Can a static library do better type checking? In particular can it 
> figure out, at compile time, if there are no applicable methods or no 
> unambiguous method?

That's not meaningful if you want to allow dynamic loading to extend 
the multi-method family.

The dispatch mechanism I used is not as fast as virtual function call 
for a single "virtual" argument, but it is only a (largish) constant 
factor off.  In a compiler implementation that factor could be reduced 
fairly close to one as far as I have planned.  For more than one 
"virtual" argument the dispatch cost increases, but not a lot -- it 
should be linear or close to it for many common usage patterns.

Lassi
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