Cairo Deref Coercion

Overview

Guide how deref coercion works via Deref and DerefMut, and when it applies.

Quick Use

• Read references/deref-coercion.md before answering.
• Show the Deref trait and a wrapper example.
• Note that DerefMut only applies to mutable variables.

Response Checklist

• Implement Deref<T> with type Target and fn deref(self: T) -> Target.
• Use deref coercion to access fields on the wrapped type.
• Use DerefMut when you need mutable-only coercion; it does not make the target mutable by itself.

Example Requests

• "Why can I access fields on a wrapper type?"
• "How do I implement Deref for a custom type?"
• "Why does DerefMut require a mut variable?"