id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2179	add support for weak_ptr	pwinston@…	Dave Abrahams	"Today shared_ptr works very well, but it makes it difficult for the C++ application to retain control over the lifetime of its objects. Variables in the interpreter which are hard to clear can prevent an object from being deleting.

weak_ptr support would be the ideal solution. A application could hand out only weak_ptrs to Python.  The object could then be deleted as normal.  

Attempting to use a weak_ptr in Python if the object has been released should throw.  Python code which knows its objects might be deleted out from under it can catch this exception.

See thread w/ Dave Abrahams titled ""application exit and shared_ptr"" in C++-sig."	Bugs	new	Boost 1.36.0	python USE GITHUB	Boost 1.35.0	Problem