Rust Tutorial #30: Unsafe Rust — When and How to Use It Safely
In the previous tutorial, we explored WebAssembly. Now we learn unsafe Rust — what it means, when you need it, and how to use it without breaking Rust’s safety guarantees. Rust’s safety system prevents bugs at compile time. But some things are impossible to verify at compile time. Raw pointer operations, FFI calls, and certain data structures need to bypass the borrow checker. That’s what unsafe is for. Important: unsafe doesn’t mean “dangerous” or “bad.” It means “the programmer is responsible for correctness here, not the compiler.” Used correctly, unsafe code is just as safe as safe code. ...