On Sun, Jun 28, 2015 at 7:16 AM, Juergen Schoenwaelder <
[email protected]> wrote:

> On Wed, Jun 24, 2015 at 12:16:55PM +0200, Martin Bjorklund wrote:
> > Hi,
> >
> > Currently we have an inconsistency in
> > draft-ietf-netmod-rfc6020bis-05.  With Y35, we allow type empty in
> > unions.  But section 7.8.2 says:
> >
> >    A leaf that is part of the key can be of any built-in or derived
> >    type, except it MUST NOT be the built-in type "empty".
> >
> > This means that this is legal:
> >
> >   typedef my-empty {
> >     type union {
> >       type empty;
> >     }
> >   }
> >
> >   list foo {
> >     key id;
> >     leaf id {
> >       type my-empty;
> >     }
> >     ...
> >   }
> >
> > I suggest we allow type empty also in keys:
> >
> > NEW:
> >
> >    A leaf that is part of the key can be of any built-in or derived
> >    type.
>
> And my understanding is that the list foo defined above will never
> have an instance, correct? I assume decent compilers will continue to
> create warnings when they can decide that a list will never have any
> instances. (And yes, there are other ways to construct such lists, so
> I am OK with removing a constraint preventing a specific case of such
> useless lists.)
>
>
I think the list can have 1 instance.


/js
>


Andy


>
> --
> Juergen Schoenwaelder           Jacobs University Bremen gGmbH
> Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
> Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>
>
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