Move strings

We can assign a variable that contains a "mutable string" to another variable
But this is called a "move" as we move the ownership of the data to the new variable.
After that we cannot use the old variable any more.
This will be fun when would like to change one of the variables or if we pass it to a function.

The variable "owns" the data.
If we assign the variable to another variable, we pass (move) the ownership.

examples/ownership/move-string/src/main.rs

fn main() {
    let name = String::from("Foo");
    println!("{name}");

    let other = name;
    println!("{other}");

    // println!("{name}"); // value borrowed here after move
}

Foo
Foo

error[E0382]: borrow of moved value: `name`
 --> examples/ownership/move_string.rs:8:15
  |
2 |     let name = String::from("Foo");
  |         ---- move occurs because `name` has type `String`, which does not implement the `Copy` trait
...
5 |     let other = name;
  |                 ---- value moved here
...
8 |     println!("{name}"); // value borrowed here after move
  |               ^^^^^^ value borrowed here after move
  |
  = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider cloning the value if the performance cost is acceptable
  |
5 |     let other = name.clone();
  |                     ++++++++

error: aborting due to previous error

For more information about this error, try `rustc --explain E0382`.