Ace the Rust Interview

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The curriculum, drills, tutor, and interviewer mode are for readers of Ace the Rust Interview. The code is printed in the Preface (Companion site access).

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beginner · order 44

Typestate for a connection

enum-typestate-01Related book chapters: 2, 7 (optional — this page is complete on its own)typestate

Slug: enum-typestate-01 · Paired reading: Chapters 2 and 7

Prompt

struct Conn<S>(PhantomData<S>) with zero-sized Disconnected / Connected markers. fn open() -> Conn<Disconnected>, fn connect(self) -> Conn<Connected>, fn send(self: &Conn<Connected>, msg: &str) -> String (e.g. prefix sent:).