Error code E0508

A value was moved out of a non-copy fixed-size array.

Erroneous code example:

struct NonCopy;

fn main() {
    let array = [NonCopy; 1];
    let _value = array[0]; // error: cannot move out of type `[NonCopy; 1]`,
                           //        a non-copy fixed-size array
}

Run

The first element was moved out of the array, but this is not possible because NonCopy does not implement the Copy trait.

Consider borrowing the element instead of moving it:

struct NonCopy;

fn main() {
    let array = [NonCopy; 1];
    let _value = &array[0]; // Borrowing is allowed, unlike moving.
}

Run

Alternatively, if your type implements Clone and you need to own the value, consider borrowing and then cloning:

#[derive(Clone)]
struct NonCopy;

fn main() {
    let array = [NonCopy; 1];
    // Now you can clone the array element.
    let _value = array[0].clone();
}

Run

If you really want to move the value out, you can use a destructuring array pattern to move it:

struct NonCopy;

fn main() {
    let array = [NonCopy; 1];
    // Destructuring the array
    let [_value] = array;
}

Run

Back to list of error codes