Does C++11 have C#-style properties?

Question

In C#, there is a nice syntax sugar for fields with getter and setter. Moreover, I like the auto-implemented properties which allow me to write

public Foo fo         


        

Answer 1

C++ doesn't have this built in, you can define a template to mimic properties functionality:

template 
class Property {
public:
    virtual ~Property() {}  //C++11: use override and =default;
    virtual T& operator= (const T& f) { return value = f; }
    virtual const T& operator() () const { return value; }
    virtual explicit operator const T& () const { return value; }
    virtual T* operator->() { return &value; }
protected:
    T value;
};

To define a property:

Property x;

To implement a custom getter/setter just inherit:

class : public Property {
    virtual float & operator = (const float &f) { /*custom code*/ return value = f; }
    virtual operator float const & () const { /*custom code*/ return value; }
} y;

To define a read-only property:

template 
class ReadOnlyProperty {
public:
    virtual ~ReadOnlyProperty() {}
    virtual operator T const & () const { return value; }
protected:
    T value;
};

And to use it in class Owner:

class Owner {
public:
    class : public ReadOnlyProperty { friend class Owner; } x;
    Owner() { x.value = 8; }
};

You could define some of the above in macros to make it more concise.