# futures_util::future::join4 - Rust
API documentation for the Rust `join4` fn in crate `futures_util`.
Keywords: rust, rustlang, rust-lang, join4

# Function futures_util::future::join4 [−] [src]

###

    pub fn join4<Fut1, Fut2, Fut3, Fut4>(
        future1: Fut1,
        future2: Fut2,
        future3: Fut3,
        future4: Fut4
    ) -> Join4<Fut1, Fut2, Fut3, Fut4>ⓘNotable traits for Join4<Fut1, Fut2, Fut3, Fut4>impl<Fut1: Future, Fut2: Future, Fut3: Future, Fut4: Future> Future for Join4<Fut1, Fut2, Fut3, Fut4>    type Output = (Fut1::Output, Fut2::Output, Fut3::Output, Fut4::Output); where
        Fut1: Future,
        Fut2: Future,
        Fut3: Future,
        Fut4: Future,

Same as `join`, but with more futures.

# Examples

    use futures::future;

    let a = async { 1 };
    let b = async { 2 };
    let c = async { 3 };
    let d = async { 4 };
    let tuple = future::join4(a, b, c, d);

    assert_eq!(tuple.await, (1, 2, 3, 4));