How do I avoid "cannot move out of static item" when using a lazy_static variable?

Question

I want to initialize a variable globally, so I used a package called lazy_static.

lazy_static::lazy_static! {
    static ref STRING: String = String::from("Hello, World");
}

fn main() {
    STRING;
}

error[E0507]: cannot move out of static item `STRING`
 --> src/main.rs:6:5
  |
6 |     STRING;
  |     ^^^^^^ move occurs because `STRING` has type `STRING`, which does not implement the `Copy` trait

I don't want to implement the Copy trait, I want to use same reference all over the application, like a 'static lifetime.

Aside: do you really want a String here? Perhaps static STRING: &'static str = "Hello, world"; (no need for lazy_static) will suffice? Indeed, in that case, it could even be const. — eggyal
– eggyal, Commented May 26, 2021 at 14:56

Shepmaster · Accepted Answer · 2021-05-26 14:11:22Z

5

Don't try to use the variable by value, use it by reference.

fn main() {
    &STRING;
}

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