🚀 go-pugleaf

Jason Merrill wrote:
> 
> >>>>> Joe Buck <jbuck@Synopsys.COM> writes:
> 
> > Stroustrup proposes that operator. only forward to the resulting class
> > for a.m if the object itself doesn't have a member m. 

	He did?

	Stroustrup actually proposed -- AND implemented and tested:

	struct X : *Y { .. };

which looked good to me. He said that programmers found it
hard to use, however, and dropped it.

> I think a more natural way to achieve the delegation semantics proposed by
> Stroustrup would be to extend 'using' along these lines:
> 
> struct A {
>   void f  ();
> };
> 
> struct ARef {
>   A* a;
>   using *a;
> };

	I believe _I_ first proposed that. Again,
it looks good on the surface but until precise details
are given it isn't easy to see exactly what the
consequences will be. As with deriving from 
an expression (Bjarne's idea) it may just turn out
to be to hard to use -- even if it works.
-- 
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81 Glebe Point Rd              fax:   61-2-660-0850
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