mcarton / cxx-python-like-property

cxx-python-like-property

This an useless project to show that we can have python-like properties in C++ (this requires C++11, clang 3.1 and g++ 4.7.2 compile it fine).

For example this python code:

class C:
    def __init__(self):
        self._x = 0

    def getx(self):
        return self._x

    def setx(self, value):
        if value > 0:
            self._x = value

    def delx(self):
        del self._x

    x = property(getx, setx)

Is equivalent to this C++ code:

class C {
    int m_x = 0;

public:
    int get_x() const {
        return m_x;
    }

    void set_x(int value) {
        if(value > 0) {
            m_x = value;
        }
    }

    make_property(int, x, get_x, set_x, C);
};

And then you can use x as if it was a public int member of the class C, but you will use transparently get_x and set_x.

C c;
std::cout << c.x << std::endl; // this prints "0"
c.x = 42;
std::cout << c.x << std::endl; // this prints "42"
c.x = -12;
std::cout << c.x << std::endl; // this prints "42"