static_bounds.rs

// Accepts any type T as its argument which satisfies 'static lifetime trait bounds.
fn generic<T: 'static>(v: T) {}

// 1. No references.
struct NoReferences(String);

// 2. Includes a 'static lifetime reference.
struct IncludesStaticRef(&'static str);

// 3. Inclues a lifetime reference named 'a
struct IncludesNamedRef<'a>(&'a str);

fn main() {
    generic(NoReferences("abc".to_string())); // -- (1)
    generic(IncludesStaticRef("abc")); // --------- (2)
    generic(IncludesNamedRef("abc")); // ---------- (3)
    {
        let x: String = format!("abc");
        generic(IncludesNamedRef(&x)); // --------- (4)
    }
}