Messages in this thread | | | Subject | RE: do { } while (0) question | From | Peter Zijlstra <> | Date | Tue, 01 Aug 2006 11:39:31 +0200 |
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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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