[pypy-dev] Support for __getitem__ in rpython?
p.giarrusso at gmail.com
Sat Dec 27 19:56:51 CET 2008
On 27/12/2008, Armin Rigo <arigo at tunes.org> wrote:
> On Fri, Dec 26, 2008 at 11:31:53AM +0100, Hakan Ardo wrote:
> > But if I replace None with NotImplemented, it does not compile
> > anymore. So, can we get the annotater to treat NotImplemented in a
> > similar manner as it treats None?
> You can try, but it's messy. It's not a problem for the annotator but
> for the later RTyper. None is implemented as a NULL pointer by the
> RTyper; I don't know how you would distinguish between None-as-a-NULL
> and NotImplemented. You could try to go for something like ((TYPE*) 1),
> but this doesn't work on top of ootype, where you really have only one
> NULL value.
I don't know ootype, but why not having a NotImplemented singleton
type, and returning a pointer to its instance? Python has a None
singleton type as well, so it makes sense.
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