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Returning Traits in Rust: Powerful, But With a Catch
- To return traits in Rust, the return values must resolve to the same concrete type.
- Returning a trait object of type `dyn Animal` requires using a pointer type like `Box
`. - Even if multiple types implement the same trait, they cannot be returned directly without boxing.
- The use of `impl Trait` requires returning a single, specific concrete type that implements the trait.
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