dyn Trait examples

Here we provide some “recipes” for common dyn Trait implementation patterns.

In the examples, we’ll typically be working with dyn Trait, Box<dyn Trait>, and so on for the sake of brevity. But note that in more practical code, there is a good chance you would also need to provide implementations for Box<dyn Trait + Send + Sync> or other variations across auto-traits. This may be in place of implementations for dyn Trait (if you always need the auto-trait bounds) or in addition to implementations for dyn Trait (to provide maximum flexibility).