Re: structs in Mutable containers
Re: structs in Mutable containers
- Subject: Re: structs in Mutable containers
- From: "Sean McBride" <email@hidden>
- Date: Tue, 16 Sep 2008 10:49:46 -0400
- Organization: Rogue Research
On 9/16/08 8:24 PM, Graham Cox said:
>CGPoints and NSPoints have the same structure so you can
>cast one to t'other.
You shouldn't really. You should use NSPointFromCGPoint/
NSPointToCGPoint. Their implementation is in NSGeometry.h and is not a
simple cast.
NSPoint and CGPoint may be the same now, but they may not always be.
(Consider that NSAffineTransformStruct and vImage_AffineTransform were
the same, but the former changed from float to CGFloat and the latter
stayed float, even in 64 bit.)
Also, they are separate structs to the compiler, so it is free (though
unlikely) to align and pack them differently.
--
____________________________________________________________
Sean McBride, B. Eng email@hidden
Rogue Research www.rogue-research.com
Mac Software Developer Montréal, Québec, Canada
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