=?ISO-8859-1?Q?Re =3A_Force_creation_of_objects_with_new_operator?=

"Leo \"Equinox\" Gaspard" <ekinox1995@gmail.com>
Fri, 1 Jul 2011 05:12:11 -0700 (PDT)
Maybe some idea could be to use in the class a pointer to a shared_ptr to i=
tself, and expose read-only access to it, or return it in the factory.
Then, as you use commit_suicide_when_done (or whatever you called it), you =
could just delete the pointer to shared_ptr, and then it means "I'm ready t=
o be deleted". So, as soon as the user allows deletion of the object by del=
eting the last copy of the shared_ptr he created, the object will be delete=
d by the shared_ptr destructor.

I mean :

class Suicide
  std::shared_ptr<Suicide> * myself_;
  Suicide() : myself(this) { }
  std::shared_ptr<Suicide> myself() { return *myself_; }
  void commit_suicide_when_done() { delete myself_; }

Then, using it as :

Suicide * s = SomeFactory::createSuicide();
// I want to use s after its deletion, I *don't* want it to be deleted
std::shared_ptr<Suicide> o = s->myself();
// And, now, I *do* agree it to be deleted, as I used it some times
delete o;

I'm not sure whether my implementation is correct, but I think it could be =
an idea.


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