-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Tuesday 14 July 2009, Frank Mori Hess wrote:
The code is in the file generic_shared.hpp (a fork of shared_ptr.hpp from trunk) which is located in the sandbox directory:
https://svn.boost.org/trac/boost/browser/sandbox/fmhess/boost/smart_ptr
The file can be copied into the main boost tree (I've been testing it with trunk). There is also a shared_ptr.hpp in the same directory, which implements shared_ptr on top of generic_shared. I used that mainly so I could do some testing of generic_shared using the shared_ptr tests unmodified. The tests pass, except for those which use enabled_shared_from_this or weak_ptr. Beyond that, I've played around a little with a few basic tests that use a user-defined pointer type, and also use a list iterator as the pointer type (with a deleter that uses the iterator to erase the element from its list).
So, the current status is: no generic_weak (analogous to weak_ptr) yet, and no shared_from_this support. Also, there is an unresolved issue with respect to casting for non-plain old pointer types. generic_shared tries to apply boost::static/const/dynamic_pointer_cast to its pointer type, but ADL doesn't work for boost::static/const/dynamic_pointer_cast, and specialization won't work either. It seems I'll need to add a ADL hook for casts as suggested at the end of this thread:
http://lists.boost.org/Archives/boost/2006/06/106406.php
so user-defined pointer types can be support casting.
A little status update: I've got generic_weak and enable_generic_shared_from_this done, and now all the smart_ptr library tests pass (with the exception of one test that uses enable_shared_from_this2) using wrappers for shared_ptr/weak_ptr/enable_shared_from_this which are built on top of generic_shared/generic_weak/enable_generic_shared_from_this. Pointer casts for non-plain old pointer types works now also. There's no documentation or tests though (beyond the smart_ptr tests). -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkpmK30ACgkQ5vihyNWuA4VTLwCgkLACR5WGHKnXQQQ8zd+FIGEp wN0AnR3eakDRViY+eOuhyFXer/QxbwAL =M/Hu -----END PGP SIGNATURE-----