How Does Ownership Work with Structs in Rust?

Ownership of a struct is determined by the ownership of its fields: assigning a struct moves ownership of all its fields to the new variable unless the fields implement Copy.

struct Point { x: i32, y: i32 }

let p1 = Point { x: 10, y: 20 };
let p2 = p1; // p1 is moved; p2 owns the data
// println!("{}", p1.x); // Error: borrow of moved value

If a struct contains a non-Copy type like String, the entire struct is moved on assignment, making the original variable unusable.

Ownership in Rust means one variable is responsible for cleaning up the data when it's no longer needed. When you assign a struct to a new variable, the new variable takes full responsibility for that data, and the old variable can no longer use it. Think of it like handing a physical object to someone else; once you give it to them, you no longer have it.