Re: Returning a nil float?
Re: Returning a nil float?
- Subject: Re: Returning a nil float?
- From: Andrew Merenbach <email@hidden>
- Date: Fri, 29 Jan 2010 16:49:06 -0800
On Jan 29, 2010, at 4:44 PM, Chunk 1978 wrote:
> i'm almost 100% sure it's not possible to return a nil on basic data
> types, but just incase i'll post the question.
>
> ------------------------------------------------------
> - (float)panForSoundWithName:(NSString *)soundName
> {
> OpenALSound *sound = [soundDictionary objectForKey:soundName];
> if (!sound) return 0.0f;
> return sound.pan;
> }
> ------------------------------------------------------
>
> so above i'd like to write "if (!sound) return nil;". my reasoning is
> because some attributes to a sound object (like pan) are created only
> when the sound is initialized. if there is no sound object than there
> should also be no pan value to return. unfortunately, the float
> default 0.0f is also the default value for pan (range from -1.0 to
> 1.0).
If you look at the definition for nil, it's typedef'd to NULL and cast as (void *)0 in stddef.h. Thus you'd be returning the middle of your range regardless. You'll probably have to refactor your code somehow.
Best,
Andrew_______________________________________________
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