RE: do { } while (0) question

[Peter Zijlstra]

On Tue, 2006-08-01 at 02:03 -0700, Hua Zhong wrote:
> > #if KILLER == 1
> > #define MACRO
> > #else
> > #define MACRO do { } while (0)
> > #endif
> > 
> > {
> > 	if (some_condition)
> > 		MACRO
> > 
> > 	if_this_is_not_called_you_loose_your_data();
> > }
> > 
> > How do you want to define KILLER, 0 or 1? I personally choose 0.
> 
> Really? Does it compile?

No, and that is the whole point.

The empty 'do {} while (0)' makes the missing semicolon a syntax error.


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