rust armanazi trait external implement coherence orphan

Rust Language and Traits

In Rust, a trait is a way to define a set of methods that can be implemented by different types. It allows for code reuse and enables polymorphism. Traits are similar to interfaces in other programming languages.

When implementing a trait for a type that you don't own, you have two options: external and orphan implementations.

• External implementations are used when you want to implement a trait for a type that you don't own, and the trait or the type is defined in an external crate or module. You can use the impl keyword followed by the trait name and the type name to implement the trait for the type.

• Orphan implementations are used when you want to implement a trait for a type that you don't own, and neither the trait nor the type is defined in your crate. In this case, you can create a new module and implement the trait for the type in that module.

The concept of coherence comes into play when there are conflicting implementations of a trait for a type. Rust enforces coherence rules to prevent conflicts and ensure that trait implementations are unambiguous.

I hope this information helps! Let me know if you have any further questions.