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SubjectRe: Significance of do ... while (0)
>> >>    Can any one explain the importance of do  ... while (0)
>> >It's a standard C programming practice; more info is available from
>> Why? {} would suffice, no need to do{}while(0)
>
>Unless I'm mistaken, it won't work in all cases. Example:
> #define foo(...) { ... /* nefarious macro stuff here */ ... }
> if (some_condition)
> foo();
> else
> // do something nifty
>
>The above would expand to:
>
> if (some_condition) {
> /* nefarious macro stuff here */
> };
> else
> // do something nifty
>
>And that's not quite right.

So it's best to always make some braces around ifs :)
Would be consistent with longer-than-one-statement blocks too.

if(some_cond) {
MY_MACRO
}



Jan Engelhardt
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