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A comment on Zero-cost futures in Rust. Parent comment

Re:Zero-cost futures in Rust by pcwalton on Thursday August 11, 2016 @12:04PM (#12269352)
I think "impl Trait" is unstable.
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Re:Zero-cost futures in Rust by eddyb on Thursday August 11, 2016 @12:09PM (#12269394)
Not even in nightly yet - follow https://github.com/rust-lang/rust/pull/35091 for updates (we're trying to land it this week).
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Re:Zero-cost futures in Rust by steveklabnik on Thursday August 11, 2016 @12:08PM (#12269389)
It is, however, it's not currently actually using that syntax in the code: http://alexcrichton.com/futures-rs/futures/trait.Future.html

So, this will work on stable. It was presented that way to not get into the whole details about the whole impl trait shenanigans in general.

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Re:Zero-cost futures in Rust by pcwalton on Thursday August 11, 2016 @12:10PM (#12269401)
Ah, great news!
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