What does the Unpin trait signify?

Unpin is an auto-implemented marker trait for types that are safe to move even after being pinned. Most standard types in Rust are Unpin; types like Futures generated by async blocks are usually !Unpin.

When should I use Box::pin instead of stack pinning?

Use Box::pin when you need to pin a value on the heap, which is the most common and easiest way to handle pinning for owned values and trait objects like 'dyn Future' that need to live beyond the current scope.

Why is Pin necessary in Rust?

Pin is required for types that must not be moved in memory after being created, such as self-referential structs or async state machines, to prevent pointers from becoming invalid and causing undefined behavior.

How do I handle Pin projection safely?

Safe projection can be done if the inner type is Unpin. For types that are !Unpin, you must use unsafe code or specialized crates like 'pin-project' to ensure that pinning invariants are maintained across fields.

Rust Pin & Memory Stability Expert

Name: Rust Pin & Memory Stability Expert
Author: huiali

byhuiali

•

開発者ツール

Masters memory stability and self-referential types in Rust by implementing Pin, Unpin, and custom Future polling patterns.

This skill provides deep expertise in Rust's pinning system, which is essential for building safe async state machines and self-referential data structures. It guides developers through the complexities of the Pin wrapper, managing the Unpin marker trait, and implementing safe pin projections to ensure memory stability. Whether you are manually polling futures or architecting complex memory layouts that involve internal pointers, this skill provides the patterns and safety checklists necessary to prevent undefined behavior and move-related compilation errors.

主な機能

01Provides automated safety documentation and verification checklists

02Diagnoses and resolves common pinning pitfalls and move-related errors

03Optimizes custom Future implementations and async state machines

0420 GitHub stars

05Implements safe and unsafe Pin projection patterns for complex structs

06Architects memory-safe self-referential data structures

ユースケース

01Designing data structures that contain internal pointers to their own fields

02Building high-performance custom async runtimes or specialized Future implementations

03Refactoring legacy async code to ensure memory safety and stability guarantees

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add huiali/rust-skills rust-pin

For use in Claude.ai and ChatGPT

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