dyn - Rust

dyn is a prefix of a trait object’s type. The dyn keyword is used to highlight that calls to methods on the associated Trait are dynamically dispatched. To use the trait this way, it must be dyn compatible1. Unlike generic parameters or impl Trait, the compiler does not know the concrete type that is being passed. That is, the type has been erased. As such, a dyn Trait reference contains two point