The things you may only fo in "unsafe" code are: - Dereference a raw pointer - Call an extern or unsafe function or method - Access or modify a mutable stati

The things you may only fo in "unsafe" code are: - Dereference a raw pointer - Call an extern or unsafe function or method - Access or modify a mutable static variable - Implement an unsafe trait - Access fields of C unions https://doc.rust-lang.org/book/ch19-01-unsafe-rust.html https://doc.rust-lang.org/book/ch19-01-unsafe-rust.html In C the most basic advanced thing you do is LinkedList. In Rust implementing it with pointers is unsafe and splitting it into two parts is unsafe