[Bug c++/56289] New: Bad unused value warning with comma operator

[thomaseding at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56289



             Bug #: 56289

           Summary: Bad unused value warning with comma operator

    Classification: Unclassified

           Product: gcc

           Version: 4.6.3

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: c++

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: thomased...@gmail.com





Compile the following with -Wunused-value:



int main () {

    int x = 0;

    int y = 0;

    (void) x, y; /* warning: right operand of comma operator has no effect

[-Wunused-value] */

    return 0;

}





This is a bad warning, as casting to void should eliminate the warning for both

x and y.