-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wednesday 18 February 2009, Nat Goodspeed wrote:
Frank Mori Hess wrote:
But if you mean the general feature of searching for some base class during connect and automatically tracking those objects, that might get added in the future. I would do it strictly as an optional extension though, in separate headers and only using the library's existing public interfaces. It would add a free function findable by ADL that would look for the trackable base class when connecting, something like:
class shared_trackable: public enable_shared_from_this<shared_trackable> {};
If I understand correctly, we expect the coder to pass to boost::bind() a plain pointer, a reference or a weak_ptr to a shared_trackable subclass instance. None of those will artificially prolong the life of that instance. However, using enable_shared_from_this lets your visitor obtain a shared_ptr to pass to slot_type::track(). Yes?
Yes
It's still the case that if the coder passes to boost::bind() an actual shared_ptr to the shared_trackable subclass instance, the slot_type::track() mechanism becomes irrelevant because the object won't die. That might warrant a note in the documentation for this feature.
Yes, that's why I suggested you could have the visitor give a compile error on finding a shared_ptr<shared_trackable> in the bind functor. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkmdcTUACgkQ5vihyNWuA4WD6wCgn9OC6qi4QLLfGPa2xSArHzTf NmsAniN+eywOOJvKvyumqj7b3z1Wj2VJ =G27o -----END PGP SIGNATURE-----