> From: Andrew Francis
>
> Just be warned that you should only use static values with this macro.
> For instance, MIN(x, somefunction()) would be a bad idea - because if
> somefunction() is lower it would be called twice! And if you had
> min(x++, y++) then the smallest value would increase by two.
>
That's a good warning to consider, but the problem with using a function is
easily solved like this:
y = somefunction();
z = min(x, y);
The incrementing problem is unavoidable with a macro because the compiler
just does a text substitution. So
z = min(x++, y++);
becomes
z = (((x++) < (y++)) ? (x++) : (y++))
and one of the two variables will be incremented twice.
Again, this is easily fixed. Just don't use the increment operator so
casually. e.g.,
z = min(x, y);
x++;
y++;
I think most C programmers know this.
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