ihcsim

fn main() {
  let (b, n) = read();
  println!("{} {}", b, n);
}

fn read() -> (String, usize) {
    let s = "some data".to_string();
    (s, s.len())
}

ihcsim

$ cargo run
   Compiling rust-ownership v0.1.0 (/home/isim/rust-ownership)
error[E0382]: borrow of moved value: `svc`
 --> src/main.rs:9:25
  |
2 |     let svc = "nginx.default".to_string();
  |         --- move occurs because `svc` has type `String`, which does not implement the `Copy` trait
...
5 |         println!("svc: {}", fqdn(svc));
  |                                  --- value moved here

ihcsim

fn main() {
    let svc = "nginx.default".to_string();
    let strict = true;
    if strict {
        println!("svc: {}", fqdn(svc));
    } else {
        println!("svc: {}", svc);
    }
}

ihcsim

fn main() {
    let str = "hello".to_string();
    println!("original: {}\nupdated: {}", str, append_suffix(str));
}

fn append_suffix(s: String) -> String {
    s + " world"
}

ihcsim

fn main() {
    let str1 = "Hello world".to_string();
    let str2 = str1;
    println!("{}\n{}", str1, str2);
}

ihcsim

$ cargo run
   Compiling rust-ownership v0.1.0 (/home/isim/rust-ownership)
error[E0382]: borrow of moved value: `svcs`
   --> src/main.rs:22:22
    |
8   |     let svcs = vec![
    |         ---- move occurs because `svcs` has type `Vec<Service>`, which does not implement the `Copy` trait
...
19  |     for svc in svcs {
    |                ----

ihcsim

type Service struct {
	name      string
	namespace string
}

func main() {
	svcs := []Service{
		{
			name:      "nginx",
			namespace: "default",

ihcsim

$ cargo run
   Compiling rust-ownership v0.1.0 (/home/isim/rust-ownership)
error[E0507]: cannot move out of index of `Vec<Service>`
  --> src/main.rs:19:17
   |
19 |     let nginx = svcs[0];
   |                 ^^^^^^^
   |                 |
   |                 move occurs because value has type `Service`, which does not implement the `Copy` trait
   |                 help: consider borrowing here: `&svcs[0]`

ihcsim

type Service struct {
	name      string
	namespace string
}

func main() {
	svcs := []Service{
		{
			name:      "nginx",
			namespace: "default",

ihcsim

$ cargo run
   Compiling rust-ownership v0.1.0 (/home/isim/rust-ownership)
error[E0382]: borrow of partially moved value: `svc1`
  --> src/main.rs:18:28
   |
15 |         namespace: svc1.namespace,
   |                    -------------- value partially moved here
...
18 |     println!("{:?}\n{:?}", svc1, svc2);
   |                            ^^^^ value borrowed here after partial move