#include <iostream>
#include <functional>
#include <string>
 
template <typename T>
class attr
{
    std::function<T()> const get;
    std::function<void(T)> const set;
 
public:
    template <typename Get, typename Set>
    attr(Get get_, Set set_)
      : get(get_),
        set(set_)
    {}
 
    operator T ()
    {
        return get();
    }
 
    template <typename U>
    attr& operator= (U value)
    {
        set(value);
        return *this;
    }
};
 
class person {
    std::string m_name;
    int m_age;
 
public:
    attr<std::string> name {
        [this]() -> std::string
        {
            std::cout << "getting name: " << m_name << std::endl;
            return this->m_name;
        },
        [this](std::string value)
        {
            std::cout << "setting name: " << value << std::endl;
            this->m_name = value;
        }
    };
 
    attr<int> age {
        [this]() -> int
        {
            std::cout << "getting age: " << m_age << std::endl;
            return this->m_age;
        },
        [this](int value)
        {
            std::cout << "setting age: " << value << std::endl;
            this->m_age = value;
        }
    };
};
 
int main()
{
    person someone;
    someone.name = "John Doe";
    someone.age = 42;
 
    std::cout << "Name: " << (std::string)someone.name << std::endl; // Here's a potential issue with the wrapper. Take out the cast, it won't work.
    std::cout << "Age:  " << someone.age << std::endl;
 
    return someone.age;
}
 

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