>From: "Alsop, Thomas R" <thomas.r.alsop@intel.com> >This is why side-effects doesn't have a meaning for me in this clause. >I understood what you meant by side effects I just didn't see a clear >example nor could I extrapolate one. initial begin int s = 4; unique case (4) (s++)+1: $display("hello"); s: $display("world"); endcase end If you evaluate the second case item expression (s) first, then it will be 4, and will match the case expression. Then you evaluate the first case item expression ((s++)+1) and it is 5, and will not match the case expression. You display "world". If you evaluate the first case item expression ((s++)+1), then it will be 5, and will not match the case expression. As a side-effect, it will increment s, so that s is 5. Then you evaluate the second case item expression (s), which is 5 and will not match the case expression. You do not display anything, but print a warning that none of the cases matched. The incrementing of s is a side-effect of the evaluation of ((s++)+1. Steven Sharp sharp@cadence.com -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.Received on Fri Nov 16 16:08:22 2007
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