shared_from_this called from constructor

Question

I have to register an object in a container upon its creation. Without smart pointers I\'d use something like this:

a_class::a_class()
{
    register_somewhere(t         


        

Answer 1

Here's my solution:

class MyClass: enable_shared_from_this<MyClass>
{
    public:
        //If you use this, you will die.
        MyClass(bool areYouBeingAnIdiot = true)
        {
            if (areYouBeingAnIdiot)
            {
                throw exception("Don't call this constructor! Use the Create function!");
            }

            //Can't/Don't use this or shared_from_this() here.
        }

        static shared_ptr<MyClass> Create()
        {
            shared_ptr<MyClass> myClass = make_shared<MyClass>(false);

            //Use myClass or myClass.get() here, now that it is created.

            return myClass;
        }
}

//Somewhere.
shared_ptr<MyClass> myClass = MyClass::Create();

(The constructor has to be public to be callable from a static member function, even an internal one...)