Re: warning: unused value: $3

[Joel E. Denny]

On Wed, 25 Oct 2006, Hans Aberg wrote:

> > > be guaranteed, in view of that Bison is switching to other types of
> > > containers than an underlying array.
> > but should the container still support the $0 notation ?
> 
> My memory is hazy, so you will have to wait for the developers with the full
> story. I think this feature may never have been official, but only something
> people used, in view of that there was an array used for parser stack. But
> when switching to C++ containers, such as std::deque, it may not hold up
> anymore.

I don't know the plans for the C++ skeletons.  However, the Open Group 
specifies that $0 and $-n should be supported by Yacc, so this should not 
go away for the C skeletons at least.