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I don't see the problem in having a separate container that manages ownership and representing links between graph nodes in terms of that. The resulting overhea

• hinkley 3y ago
  To a moderately informed spectator, it does seem like Rust should be able to reasonably handle complex (cyclic) data structures - but only when the design can be expressed as composition. With aggregation you have a gnarly potentially undecidable state tree. I'm pretty sure that at least some instances of aggregation could be expressed as composition if you took a crowbar to the architecture and squinted a little bit. For instance, a child object can survive the death of a parent by being adopted by another.
  • zozbot234 3y ago
    > For instance, a child object can survive the death of a parent by being adopted by another. This is loosely speaking what the qcell crate provides already, via TCell. But the "adoption" protocol involves the use of complex patterns where compile-time "token" types (which one could also see as capabilities for the underlying object) are passed to the relevant code.