property.cpp

#include <functional>

template<typename T>
struct Property
{
    Property(T& value)
    {
        _setter = [&value](T new_value) { value = new_value; }
        _getter = [&value]() { return value; }
    }
    Property(std::function<T()> getter, std::function<void(T)> setter = std::function<void(T)>())
    {
        _setter = setter;
        _getter = getter;
    }

    T operator() { return _getter(); }
    Property& operator=(T value) { _setter(value); }

    std::function<T()> _getter;
    std::function<void(T)> _setter;
};

struct Foo
{
    Property<int> int_prop{ _number };
    Property<int> int_prop2{
        [this]() {
            return _number;
        },
        [this](int value) {
            _number = value;
        }
    };

private:
    int _number;
};