AgentSkillsCN

cairo-deref-coercion

当请求涉及 Cairo 的标量与复合数据类型、字面量、类型转换以及字符串形式时，讲解 Cairo 类型（felt252、整数、布尔值、字符串、元组、数组、unit）、类型注解，以及类型转换错误的处理方法。

SKILL.md
--- frontmatter
name: cairo-deref-coercion
description: Explain Cairo deref coercion with Deref/DerefMut traits and Target associated type; use when a request involves wrapper types, field access through wrappers, or deref behavior in Cairo.

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?"