23 lines
470 B
Rust
23 lines
470 B
Rust
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// Issue #72117
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// edition:2018
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use core::future::Future;
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use core::pin::Pin;
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pub type BoxFuture<'a, T> = Pin<Box<dyn Future<Output = T> + Send + 'a>>;
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impl<T: ?Sized> FutureExt for T where T: Future {}
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trait FutureExt: Future {
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fn boxed<'a>(self) -> BoxFuture<'a, Self::Output>
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where
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Self: Sized + Send + 'a,
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{
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Box::pin(self)
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}
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}
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fn main() {
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let _: BoxFuture<'static, bool> = async {}.boxed();
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//~^ ERROR: mismatched types
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}
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