[Mono-list] Re: Is Objective-C support possible?
18 Feb 2002 22:18:44 +0000
> Just to clarify. The CLR does NOT dissallow multiple inheritance. It
> just doesn't provide explicit support for it. There is a big difference.
> Eiffell for .Net has multiple inheritance. John Gough's book "Compiling
> for the CLR" has a section on implementing MI on top of the CLR. to quote
> "The CLR does not provide facilities for the direct implementation of
> multiple inheritance. In particular, the CLR mechanisms for virtual
> method dispatch and object layout are inherently tied to an execution
> model with single inheritance and multiple interfaces. Nevertheless, as
> the Microsoft managed c++ compiler shows, it is possible to implement MI
> all the same. The fundamental idea behind such an implementation is to
> ignore the CLR facilities for method dispatch and instead layout the
> v-table explicitly" he then goes on to discuss several possible ways of
> implementing this.
To be honest, I'm not sure that's a clarification. How can code be
managed if it bypasses the CLR virtual execution system? And, what about
IL's explicit support of single inheritance?