Warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning)

Question

I have this problem in my code:

bool CBase::isNumber() { return (id & MID_NUMBER); }  bool CBase::isVar() { return (id & MID_VARIABLE); }  bool CBase::isSymbol() { return (id & MID_SYMBOL); } 

Answer 1

FYI: Casts won't hide the warning by design.

Something like

return (id & MID_NUMBER) != 0; 

should clearly state "I want to check whether this value is zero or not" and let the compiler be happy