[Zope3-dev] Nasty bugs

[Shane Hathaway]

Steve Alexander wrote:
> Guido van Rossum wrote:
> 
>>
>>     (2a) Why would None need to be wrapped?
> 
> 
> This opens up a larger problem, and one which Shane and I have been 
> discussing at some length on IRC.
> 
> If None is wrapped, we can't expect to use Zope3 directly with 
> third-party modules that say:
> 
>   if foo is None:
> 
> ..as, a wrapped None is not None.

Here's a thought.  We need primitives that are mutable to sometimes be 
wrapped, for example to prevent a list, returned from a function unaware 
of security, from being mutated by untrusted code.  But "None", numbers, 
and strings probably shouldn't ever be wrapped.  As for tuples, it's 
hard to say.

Shane