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lifetime bound

A requirement that a type's references stay valid for at least a given lifetime.

T: 'a requires every reference inside T to outlive 'a; 'b: 'a requires region 'b to outlive 'a.

Examples

  • fn keep<T: 'static>(t: T) accepts String::from("x"), which holds no borrow, but rejects &local for a local String with E0597.

See also

static lifetime trait bound lifetime parameter
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