AsyncFn in std::ops - Rust (original) (raw)

Trait AsyncFn

1.85.0 · Source

pub trait AsyncFn<Args>: AsyncFnMut<Args>

where
    Args: Tuple,

{
    // Required method
    extern "rust-call" fn async_call(
        &self,
        args: Args,
    ) -> Self::CallRefFuture<'_>;
}

Expand description

An async-aware version of the Fn trait.

All async fn and functions returning futures implement this trait.

Source

🔬This is a nightly-only experimental API. (async_fn_traits)

Call the AsyncFn, returning a future which may borrow from the called closure.

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.