Re: [RFA]: BOOL coding standards (Was: Problemwith+numberWithBool:?)

[Nicola Pero]

> > IOW: C "truths" (i.e. C truth semantice) aren't implicitly converted to 
> > BOOL YES/NO.  The conversion must be made explict.
> 
> But who in his sane mind would write:
> 
> > >> [NSNumber numberWithBool: (i=256)]; => NO
> 
> instead of:
> 
>      [NSNumber numberWithBool: (i=256)!=0]; => YES
> 
> ?

It's easy to build more convincing examples.

If you follow the "BOOLs are the same as C truth values" philosophy
without thinking too much, then you could end up writing stuff like

- (BOOL) isNonEmpty
{
  return count;
}

where count is an int counting the number of items in an array.

You could think that since BOOLs work as C truth values, if count is > 0,
this is YES, if it's 0, it's NO (I'm sure you've seen enough C coders to
know they love being "clever" in that way with C truth values), so the
code should work, but unfortunately it doesn't.