On Fri Nov 12, 1999 at 11:38:12AM +0100, Glynn Clements wrote:
>
> > #include <setjmp.h>
> >
> > jmp_buf errorhandler;
> > #define FAIL(why) fprintf(stderr, why); longjmp(errorhandler, 1)
>
> Ouch. If someone decides to write:
>
> if (...)
> FAIL(...);
>
> the result won't be what they expect, and the bug could be fairly hard
> to find. The usual solution is to use something like:
>
> #define FAIL(why) do {fprintf(stderr, why); longjmp(errorhandler, 1);} while (0)
>
> which is a single statement, and so doesn't have this problem.
Good point. I was overly terse.
-Erik
--
Erik B. Andersen Web: http://www.xmission.com/~andersen/
email: [EMAIL PROTECTED]
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