Rust Async State Machine, Unmasked: How Future, poll, and Waker Really Work
Your Rust async code is a “liar”—and I’m going to strip its state machine down to the bones. Have you ever written an async function, happily called it, and then… the program just ended with nothing happening? You stare at the screen: Where did my code go? Where’s my println!? Did I just run emptiness? Don’t panic. You’re not alone. Welcome to the world of Rust async, where the first rule is: what you see isn’t necessarily what’s happening. ...