On Jul 2, 2012, at 4:24 AM, Andreas Grosam wrote:

> Anyway, is it preferable to use always Cocoa macros (NSInteger, NSUInteger, 
> etc.) for an Objective-C API - or may/should I use int, unsigned int, or 
> maybe int32_t, uint32_t, etc. when it seems more appropriate?

Sure, use smaller types if it's appropriate. But consider first whether the 
size savings are worthwhile (keeping in mind C's data alignment and struct 
packing rules.)

I'm not a big fan of NSInteger/NSUInteger because they have the very annoying 
property of being different sizes in 32 vs 64 bit builds (one consequence is 
that there is no '%' formatting specifier that works correctly with them.) But 
if your API represents things like collection sizes or array indexes, it's best 
to play along and use those types.

—Jens
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