Trait Executor

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pub trait Executor: Sized {
    // Required methods
    fn new() -> Result<Self, Error>
       where Self: Sized;
    fn spawn(&self, future: impl Future<Output = ()> + MaybeSend + 'static);

    // Provided method
    fn enter<R>(&self, f: impl FnOnce() -> R) -> R { ... }
}

Expand description

A type that can run futures.

Required Methods§

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fn new() -> Result<Self, Error>
where Self: Sized,

Creates a new Executor.

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fn spawn(&self, future: impl Future<Output = ()> + MaybeSend + 'static)

Spawns a future in the Executor.

Provided Methods§

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fn enter<R>(&self, f: impl FnOnce() -> R) -> R

Runs the given closure inside the Executor.

Some executors, like tokio, require some global state to be in place before creating futures. This method can be leveraged to set up this global state, call a function, restore the state, and obtain the result of the call.