It seems to do both: https://hkalbasi.github.io/zngur/tutorial.html#calling-c-from-rust https://hkalbasi.github.io/zngur/tutorial.html#calling-c-fro... It sou

It seems to do both: https://hkalbasi.github.io/zngur/tutorial.html#calling-c-from-rust https://hkalbasi.github.io/zngur/tutorial.html#calling-c-fro... It sound like your quoted text is just saying that it’s not as ergonomic, you cannot use arbitrary C++ types directly in Rust, but you can use arbitrary Rust types in C++.