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      Integrating with patterns that cannot be proved safe by the rust compiler is always going to require unsafe. Instead of attempting to provide a general solution for all data types of interest, perhaps each one should be manually wrapped in a safe interface, when possible? And if a gauranteed safe interface is not possible, then resort to unsafe.

      I would like to see support for safe in-place intialization of heap structures prioritized, though. That is definitely a weakness in the existing Rust language that has bitten me before. Particularly when attempting to keep a very large struct containing multiple arrays contiguous in heap memory, to make memcopy’s cheap.