Re: Re: ++ BUG?? (fwd)

At 21:45 26/11/2000, Ignacio Vazquez-Abrams wrote:

On Sun, 26 Nov 2000, Stanislav Malyshev wrote: IV>> are happening at the wrong time. They seem to be happening before the IV>> assignment instead of after the whole statement. Pre operations work as I do not get this. Why should ++ operator happen _after_ the assignment? Expression is evaluated as expression, and it does not know anything on the following assignment. $idx = ($idx++)%2 should leave $idx as 0. The PHP manual states "C-style ... operators". C only does the post(inc|dec) at the end of the statement, not after the expression.

Which C is that? :) That's wrong. ++ and -- are operators. Operators obey to precedence rules inside expressions. Pretty much nothing in C is done on a per-statement basis. As a small proof of concept, what do you think the result of the following file would be: void quiz(int foo, int bar) {

        printf("%d", foo+bar);

} void main() {

        int i=0;

        quiz(i++, i++);

} Zeev Hint: If you came up with any numerical answer, you're wrong. -- Zeev Suraski <zeev@zend.com> CTO, Zend Technologies Ltd. http://www.zend.com/