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That’s just poor software. A poor Rust dev would be one who clones everything.

`.clone()` is visible right in your code, though, unlike the implicit conversion/constructor magic.

But you could write a C++ class with a manual .copy() method and a deleted copy constructor (and other conversion constructors not implemented).

Doing that seems a bit easier than integrating a whole new language into your project (although I know Rust would have other benefits).

You could do that if you are the author of std::string. Unfortunately, very few of us are.