Re: NS_INLINE and obj = nil;?
Re: NS_INLINE and obj = nil;?
- Subject: Re: NS_INLINE and obj = nil;?
- From: Dave G <email@hidden>
- Date: Mon, 4 Jan 2010 08:56:19 +1100
2010/1/4 Greg Parker <email@hidden>:
> On Jan 2, 2010, at 9:30 AM, Alexander Spohr wrote:
>> I put a , not a ; between the statements. So at least my last example would work - had I just left the last ; out of it:
>>
>> #define GDRelease(x) [(x) release], (x) = nil
>> expands to:
>> if(x)
>> [(x) release], (x) = nil;
>> else
>> foo(x);
>>
>> But the while(0) looks not as fragile.
>
> The do..while form also prevents errors like this:
>
> if (GDRelease(x)) { ... }
> // this is nonsense
>
> if ( do { [(x) release]; (x) = nil; } while (0) ) { ... }
> // this expansion is a compile error: good
>
> if ( [(x) release], (x) = nil ) { ... }
> // but this expansion compiles successfully: bad
>
Easily fixed:
#define GDRelease(x) [(x) release], (x) = nil, (void)0
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden