[cfe-dev] "expression result unused" in comma expression

Ted Kremenek kremenek at apple.com
Tue Aug 28 10:21:23 PDT 2007

A test case to the frontend generated the following unexpected warning:

   warning: expression result unused
     x = ++x, ++y, y+2;

   int comma_in_assignment(int x, int y) {
     x = ++x, ++y, y+2;
     return x;

Removing the "++x" also generates the same warning.  Any thoughts?  Is  
this desired behavior?

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