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I've heard this suggestion fairly frequently - that people use Rust as a wrapper over C++ bindings to add in safety to the C++ underneath.

Mostly regarding using BLAS etc in Rust rather than C++. It seems a little pointless as the unsafe nature is within the underlying code, so it only santises input/output.

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For that use case it is more productive to actually use static analysis tooling for C++.

"people use Rust as a wrapper over C++ bindings to add in safety to the C++ underneath."

Adding a thin wrapper over an insecure library won't magically make it secure. That's why pure Rust or pure Swift versions of various algorithms and functionalities are worth so much - guaranteed memory-usage correctness.

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