/in/foo.cc: In function 'bool cmp(Date, Date)':
/in/foo.cc:39:16: warning: value computed is not used [-Wunused-value]
     d1.toInt() < d2.toInt();
                ^
/in/foo.cc:40:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^