This is very cool.
Thanks...

> 
>  A few days ago I checked in some changes to the way shared_ptrs get
>  converted to Python.  A while back I had added a special shared_ptr
>  deleter which caused all shared_ptr conversions from python to
>  maintain the lifetime of the owning Python object, not of the C++
>  object.  In other words, we'll have this:
> 
>        shared_ptr<T>         T
>       +------+------+     +------+
>       |      |      |     |      |
>       |  *   |   *------->|      |
>       |  ||  |      |     |      |
>       +--||--+------+     +------+
>          ||                  />         \/                  ||
>       +-----------------+    ||
>       |                 |    ||
>       | Python Object *======++
>       |                 |
>       +-----------------+
> 
>  The double lines represent ownership relationships.  Now, when such a
>  shared_ptr is converted back to python, the owned Python object is
>  returned, rather than a new Python object being built around the
>  shared_ptr, sharing ownership of the T object with the Python object
>  above.
> 
>  -Dave
> 
>  --
>  Dave Abrahams
>  Boost Consulting
>  www.boost-consulting.com




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