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{
  "type": "json",
  "example": {
    "query": {
      "q": "rust async trait",
      "tagged": "rust",
      "accepted": true
    },
    "source": "https://api.stackexchange.com/2.3/search/advanced",
    "checkedAt": "2026-10-14T07:00:58.241Z",
    "questions": [
      {
        "link": "https://stackoverflow.com/questions/66859270/can-a-rust-async-function-work-without-importing-the-future-trait",
        "tags": [
          "rust",
          "future"
        ],
        "score": -1,
        "title": "Can a Rust async function work without importing the Future trait?",
        "answers": 1,
        "license": "CC BY-SA 4.0, Stack Overflow",
        "accepted": true,
        "acceptedAnswer": "How can this desugar be done if no Future trait is imported? \n \n The compiler desugars to the fully-qualified path: core::future::Future . \n \n why is the Future trait not defined in Rust itself, but instead is in a crate? \n \n It is in the standard library: std::future::Future . The Rust API documentation has a search function; I encourage you to become familiar with it. \n The Future trait was defined in the futures crate before it was added to the standard library, much like the Stream trait. Those both exist in the standard library now."
      },
      {
        "link": "https://stackoverflow.com/questions/70995999/generic-async-trait-that-returns-the-implemented-struct",
        "tags": [
          "rust"
        ],
        "score": 0,
        "title": "Generic async trait that returns the implemented Struct",
        "answers": 1,
        "license": "CC BY-SA 4.0, Stack Overflow",
        "accepted": true,
        "acceptedAnswer": "You've declared init to take 2 generic parameters: T and E . \n This means that the code that calls init has to provide the concrete types to fill in those parameters. For example, if someone was using your library, it would be totally feasible for them to write init::<i64, ()>() , and your code should deal with that. \n Because of that, when you define your impl DB for FavouritesDB , you write this: \n\nasync fn init<FavoritesDB, FavoritesError>() -> Result<FavoritesDB, FavoritesError>\n\n This is no different to writing: \n\nasync fn init<T, E>() -> Result<T, E>\n\n you've just given the type paramete"
      }
    ]
  }
}