Macro scoped_static 

macro_rules! scoped_static {
    ($ref_value:expr) => { ... };
}

A safe way to create a ScopedRefGuard.

use scoped_static::scoped_static;

#[tokio::main]
async fn main() {
    let concrete_value = Box::new(1.0);
    let ref_value = &concrete_value;
    let guard = scoped_static!(ref_value);
    let lifted = guard.lift();
    tokio::spawn(async move {
        // Lifted is 'static so it can be moved into this closure that needs 'static
        let value = **lifted + 1.0;
        assert_eq!(value, 2.0);
        // `lifted` is dropped here
    })
    .await
    .unwrap();
   // `guard` is dropped here
}