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by remexre 2099 days ago
I think you can do "real" ownership in ATS; or check ownership with a static analysis tool in many languages, including C; and you should be able make a hacky version as a library that dies at runtime in any language with parametric polymorphism and modules. "Modern C++" too, ish.

Which Lisps are you thinking of? CL and Scheme both allow having multiple copies of mutable objects.