June Clementine Strawberry
a1e1f40ded
Signed-off-by: June Clementine Strawberry <strawberry@puppygock.gay>
35 lines
762 B
Rust
35 lines
762 B
Rust
//! Extended external extensions to futures::FutureExt
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use std::marker::Unpin;
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use futures::{Future, future, future::Select};
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/// This interface is not necessarily complete; feel free to add as-needed.
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pub trait ExtExt<T>
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where
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Self: Future<Output = T> + Send,
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{
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fn until<A, B, F>(self, f: F) -> Select<A, B>
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where
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Self: Sized,
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F: FnOnce() -> B,
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A: Future<Output = T> + From<Self> + Send + Unpin,
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B: Future<Output = ()> + Send + Unpin;
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}
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impl<T, Fut> ExtExt<T> for Fut
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where
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Fut: Future<Output = T> + Send,
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{
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#[inline]
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fn until<A, B, F>(self, f: F) -> Select<A, B>
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where
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Self: Sized,
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F: FnOnce() -> B,
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A: Future<Output = T> + From<Self> + Send + Unpin,
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B: Future<Output = ()> + Send + Unpin,
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{
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future::select(self.into(), f())
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}
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}
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