Il dom 2 feb 2020, 10:22 Kevin Wolf <kwolf@redhat.com> ha scritto:

> Am 31.01.2020 um 13:27 hat Eric Blake geschrieben:
> > On 1/28/20 6:54 AM, Kevin Wolf wrote:
> >
> > > >
> > > > The arguments as dotted keys:
> > > >
> > > >      id=bar,backend.type=file,backend.data.out=/tmp/bar.log
> > > >
> > > > Observe there's quite some of nesting.  While that's somewhat
> cumbersome
> > > > in JSON, it's a lot worse with dotted keys, because there nesting
> means
> > > > repeated key prefixes.  I could give much worse examples, actually.
> > >
> > > This is true, but even without the repeated keys (e.g. in a syntax that
> > > would use brackets), it would still be unnecessarily verbose and
> > > probably hard to remember:
> > >
> > >      id=bar,backend={type=file,data={out=/tmp/bar.log}}
>
> [...] I actually think that a syntax like this might make sense for
> something like qmp-shell. It might even be more convenient on the
> command line than dotted keys if you get a lot of repetition (despite
> the required quoting), but it's strictly speaking incompatible because
> you could use {} in strings today.
>

If you are willing to feed schema info to the parser, in principle you
could keep backwards compatibility. There would be limitations such as
putting the discriminator before the fields, so I am not sure it's a good
idea.

Better QOM introspection would be a requirement, too.

Paolo


> Kevin
>
>