Re: [Pyobjc-dev] More on integer values

[Ronald O. <ous...@ci...>]

On Monday, Feb 3, 2003, at 04:35 Europe/Amsterdam, bb...@ma... wrote:

> On Sunday, Feb 2, 2003, at 21:08 US/Eastern, David Eppstein wrote:
>> If they're not interchangeable, then maybe it's a bug that calling 
>> into and back from the undo manager is changing my ints into 
>> integers?  The point is, I'm passing it arguments that should work, 
>> and it's giving me back ones that don't work.
>
> The underlying problem is that the bridge has no way of knowing the 
> signature of the method your are invoking upon 
> prepareWithInvocationTarget_() and, as such, assumes everything passed 
> into that method is an int.
is and object [ed.] ;-)

[explanation of how NSUndoManager works removed for brevity]
> At least, I think it does.
Thats right.
>
> Fixing it may be hard.

Not too hard. There are (at least) two possible solutions:

- David could use objc.selector to specify a signature that is more to 
its liking (e.g. one of the
   arguments is an int instead of an object). I don't really like this, 
mostly because of the arcane
   interface of selector()

- We could treat NSNumber like a Python number when translating 
arguments to Objective-C values. Doing
   that would not be too hard. Or we could translate NSNumbers to Python 
numbers when translating from
   Objective-C values to Python values, but I don't think we should do 
that.

Ronald