Re: Problem with +numberWithBool: ?

[Richard Frith-Macdonald]

On 29 Jan 2004, at 13:46, David Ayers wrote:

> Richard Frith-Macdonald wrote:
>
> > On 29 Jan 2004, at 12:24, Manuel Guesdon wrote:
> >
> > > So as far as I understand [NSNumber numberWIthBool:2] will return  
> > > boolN which is wrong as 2 is TRUE, isn't it ? (Or may
> > > I need some sleep ? :-)
> >
> >
> > I agree it'll return boolN ... but 2 is not YES
> > Booleans in objc can be YES or NO ... this is not the same thing as  
> > true/false in C/ObjC conditionals where 0 is false and anything  
> > non-zero is true.
>
> Checking the online docs:
> http://developer.apple.com/documentation/Cocoa/Reference/Foundation/ 
> ObjC_classic/Classes/NSNumber.html#//apple_ref/doc/initWithBool_
>
> I read:
> boolValue:
> ...
> *Note: *The value returned by this method isn’t guaranteed to be one  
> of |YES| or |NO|. A 0 value always means |NO| or false, but any  
> nonzero value should be interpreted as |YES| or true.

We should go with that then.

I've had problems with inconsistencies in NeXTstep handling YES long it  
the past ... but if the current documentation warns about a particular  
behavior with a method, we should try to duplicate that behavior.