On Fri, 29 Oct 2021 at 11:10, Steven D'Aprano <st...@pearwood.info> wrote:
> Obviously you need a way to indicate that a value in __defaults__ should
> be skipped. Here's just a sketch. Given:
>
> def func(a='alpha', b='beta', @c=expression, d=None)
>
> where only c is late bound, you could have:
>
> __defaults__ = ('alpha', 'beta', None, None)
> __late_defaults__ = (None, None, <code for expression>, None)
Why not define an object for that?
__defaults__ = ("alpha", "beta", _delayed, None)
In this example I don't mean a fancy new delayed evaluation type such
as has been discussed elsewhere, but just a sentinel so Python knows
it has to look into __late_defaults__ at all (I'm probably missing
something, and I didn't read all prior emails on this, but why
wouldn't this type contain a reference to the code object directly,
negating the need for __late_defaults__...?).
Regards,
Gerrit.
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