AsyncDrop Pattern Guide

The AsyncDrop pattern enables async cleanup for types that hold resources requiring asynchronous teardown (network connections, file handles, background tasks, etc.).

Core Concept

Rust's Drop trait is synchronous, but sometimes cleanup needs to be async. The AsyncDrop pattern solves this by:

1. Wrapping values in AsyncDropGuard<T>
2. Requiring explicit async_drop().await calls
3. Panicking if cleanup is forgotten

Quick Reference

// Creating
let mut guard = AsyncDropGuard::new(my_value);