Ace the Rust Interview

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async fn in traits Send bound

async-trait-01Related book chapters: 13 (optional — this page is complete on its own)async-fn-trait

Slug: async-trait-01 · Paired reading: Chapter 13

Prompt

RPITIT style (avoid async_fn_in_trait lint): trait KeyValue { fn get(&self, key: &str) -> impl Future<Output = Option<String>> + Send; } with MemStore impl. Test with block_on; assert the future is Send.