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Re: Weird error with structs and @try/@catch
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Re: Weird error with structs and @try/@catch


  • Subject: Re: Weird error with structs and @try/@catch
  • From: Uli Kusterer <email@hidden>
  • Date: Thu, 11 May 2006 12:34:11 +0200


Am 11.05.2006 um 03:47 schrieb Glen Simmons:


On May 10, 2006, at 8:32 PM, Shaun Wexler wrote:

On May 10, 2006, at 6:29 PM, Glen Simmons wrote:

This is a bug, for sure... but for a workaround, can't you just recast it?


[self foo:(NSRect)aRect];

Nope, that recast has no effect. Is there a way to cast away the volatile-ness?

Try this instead:

[self foo:*(NSRect *)&aRect];

Yep, that works. But boy is it ugly. :)

A good idea would be to do a #define for that:

#define CAST_AWAY_VOLATILE(var)	(*(typeof(var) *) &var)

then you can write:

[self foo: CAST_AWAY_VOLATILE(aRect) ];

And you'll actually know what you were doing back then. For the "why", you'd probably want to add a comment mentioning you're working around that particular error message.

Though I feel kinda bad just casting away volatile-ness. Anyone remember what that did and why it's safe to just cast it away?

Cheers,
-- M. Uli Kusterer
http://www.zathras.de


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References: 
 >Weird error with structs and @try/@catch (From: Glen Simmons <email@hidden>)
 >Re: Weird error with structs and @try/@catch (From: Shaun Wexler <email@hidden>)
 >Re: Weird error with structs and @try/@catch (From: Glen Simmons <email@hidden>)
 >Re: Weird error with structs and @try/@catch (From: Shaun Wexler <email@hidden>)
 >Re: Weird error with structs and @try/@catch (From: Glen Simmons <email@hidden>)

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