...
And so, sp_collector suffers the same problem as shared_cyclic_ptr, and requires the same remedy: that is, it is necessary to be able to "tag" a container as being one which might hold "internal" shared_ptr's.
Any interest in modifying shared_ptr to support something like this?
Yes, but I haven't had time since my cyclic_ptr work.
It seems that rather than take the route of modifying all the standard containers one might as well just provide a special operator new(gc) and gc_allocator that can track all the memory blocks on the heap that might contain a shared_ptr. Then one can either replace global operator new with the special one, or use new(gc) or gc_allocator wherever needed.
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