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Re: NSLog(@"%@",[NSProxy class]);

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Re: NSLog(@"%@",[NSProxy class]);

Subject: Re: NSLog(@"%@",[NSProxy class]);
From: Agent M <email@hidden>
Date: Fri, 17 Mar 2006 21:56:48 -0500

I did some more digging on why a private method is required to be implemented in order for objects to be successfully passed to NSLog (CFLog). Here's the relevant code:

http://cvs.opendarwin.org/cgi-bin/cvsweb.cgi/src/CoreFoundation/ Base.subproj/CFRuntime.c?rev=1.3&content-type=text/x-cvsweb-markup

CFStringRef CFCopyDescription(CFTypeRef cf) {
#if defined(DEBUG)
    if (NULL == cf) HALT;
#endif
    CFTYPE_OBJC_FUNCDISPATCH0(CFStringRef, cf, "_copyDescription");
...

traced from the heavy-duty function __CFParseFormatSpec in: http://cvs.opendarwin.org/cgi-bin/cvsweb.cgi/src/CoreFoundation/ String.subproj/CFString.c?rev=1.5&content-type=text/x-cvsweb-markup

This function is called on every ObjC object passed to NSLog() so root classes that fail to implement it cannot be printed. Anyway, I would like to point to this as a good example of why open source code is good.

rdar://4482973 (expected to be flagged as "Expected Behavior")

¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬
AgentM
email@hidden
¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬ ¬

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  >NSLog(@"%@",[NSProxy class]); (From: Agent M <email@hidden>)




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