[C++-sig] using shared_ptrs with the vector_indexing_suite

[Greg Landrum]

I'm attempting to get shared_ptrs working in combination with the
vector_indexing_suite in order to make it easy to return std::vectors
of shared_ptrs from our code.

I feel like I've got a reasonable grasp of what's required to return
shared_ptrs (given how easy that is now, this isn't much of an
accomplishment), and I've even managed to get them working with the
iterator interface, but the combination with vector_indexing_suite
eludes me.

The attached module and testing code demonstrate the problem.  When I
build this module and run the test (linux, python 2.3.4, g++ 3.2,
boost 1.32), all the tests pass except for test5 and test5b, which use
std::vectors of shared_ptrs. Both of those tests fail with the error:

TypeError: No Python class registered for C++ class boost::shared_ptr<DemoKlass>

Because the basic shared_ptr operations and the more complicated
iterator stuff work, I'm guessing this has something to do with the
vector_indexing_suite itself.

Thanks in advance for any help,
-greg
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