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Re: The orca, GNUstep's mascot


From: Graham J Lee
Subject: Re: The orca, GNUstep's mascot
Date: Tue, 29 Apr 2008 07:39:35 +0100


Hi Gregory,

On 28 Apr 2008, at 22:52, Gregory John Casamento wrote:
Damn... yes, I was thinking of TEST_RELEASE.
[...]

Gregory John Casamento wrote:
RELEASE is a #define which does the standard checking that needs to
be done when doing a release.

In what way needs to be done? The scenarios for sending [obj release] are:
1. obj is nil; nothing happens.
2. obj is not an id; crash (if you're lucky).
3. obj is an id which does not respond to @selector(release), and has no forwarding mechanism; runtime exception. 4. obj is an id which responds to @selector(release) or consumes it in some other way; it does its stuff.

Case 1 is a special example of case 4, so case 2 needs to be tested for and some might argue case 3. But the macro is defined as:

#define TEST_RELEASE(object)     ({ if (object) [object release]; })

which doesn't provide that.

Thanks,
Graham.




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