Question

Lets start with a simple class in C++ :

class aClass {
        bool b;
        aClass(bool x){b=x;} 
};

Is it possible to typedef 2 new types stateTrue and stateFalse so that if I do:

stateTrue variable;

it would translate to:

aClass  variable(true); 

?

Answer 1

An alternative to inheritance could be to make aClass a template:

template <bool T>
class aClass
{
public:
    bool b;
    aClass(): b(T) {}
};

typedef aClass<true>  stateTrue;
typedef aClass<false> stateFalse;