# Function futures::future::join_all
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[src]

`pub fn join_all<I>(i: I) -> JoinAll<I> where I: IntoIterator, I::Item: IntoFuture`

Creates a future which represents a collection of the results of the futures given.

The returned future will drive execution for all of its underlying futures,
collecting the results into a destination `Vec<T>`

. If any future returns
an error then all other futures will be canceled and an error will be
returned immediately. If all futures complete successfully, however, then
the returned future will succeed with a `Vec`

of all the successful results.

# Examples

use futures::future::*; let f = join_all(vec![ ok::<u32, u32>(1), ok::<u32, u32>(2), ok::<u32, u32>(3), ]); let f = f.map(|x| { assert_eq!(x, [1, 2, 3]); }); let f = join_all(vec![ ok::<u32, u32>(1).boxed(), err::<u32, u32>(2).boxed(), ok::<u32, u32>(3).boxed(), ]); let f = f.then(|x| { assert_eq!(x, Err(2)); x });