Re: FYI: default %printer/%destructor

[Hans Aberg]

On 19 Nov 2006, at 23:36, Joel E. Denny wrote:

> > > > The %destructor is only needed with output language C.
> > >
> > > Currently, it's also useful for C++.
> >
> > You mean, of one writes code in the common C/C++ subset. :-)
>
> I think you, Akim, and I have all agreed that semantic types cannot  
> have
> C++ destructors given Bison's current C++ skeletons.  You need % 
> destructor
> instead.  That's what I'm referring to.

Not anymore:

I think that the %define tweak that enables one to include code  
enables me to use my polymorphic C++ type, which I have used for  
several years my own Bison tweaks. I am looking at this around these  
days, though reality prevents me to do much work on it. I still need  
a tweaked skeleton file, but it need just some code placement macros.  
This is for untyped .y Bison; to type it, I need another tweak.  
Basically, a way to trigger the Bison type system, plus a macro to  
select the correct type in the runtime object.

  Hans Aberg