This article explains the purpose and mechanics of std::pin::Pin in Rust, focusing on how it prevents memory moves for self-referential types. It highlights the critical role of pinning in the async/await ecosystem to ensure the stability of internal pointers within generated state machines.
Background
Self-referential structures are difficult to manage safely in Rust due to its strict memory movement guarantees. Pinning was introduced to allow specific use cases, particularly in asynchronous programming, where moving data would invalidate internal references.
- Source
- Lobsters
- Published
- Jun 30, 2026 at 12:37 AM
- Score
- 5.0 / 10