Copy

fn main() {

    let s1 = 1;

    let s2 = s1;

    println!("s1 is {}", s1);

    println!("s2 is {}", s2);

    //Explained later

    #[derive(Debug, Clone, Copy)]
    struct Rectangle {
        width: u32,
        height: u32,
    };

    let rect1 = Rectangle {
        width: 2,
        height: 3,
    };

    let rect2 = rect1;

    println!("rect1 is {:?}", rect1);
    println!("rect2 is {:?}", rect2);
}

• Copy trait

  • Memory allocated on stack

• Type implementing Drop trait cannot marked as Copy

• Examples of copy:

  • Primitive types
  • Group of copy