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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:11:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:11:28 +0000 |
commit | 94a0819fe3a0d679c3042a77bfe6a2afc505daea (patch) | |
tree | 2b827afe6a05f3538db3f7803a88c4587fe85648 /src/test/ui/higher-rank-trait-bounds/issue-95034.rs | |
parent | Adding upstream version 1.64.0+dfsg1. (diff) | |
download | rustc-94a0819fe3a0d679c3042a77bfe6a2afc505daea.tar.xz rustc-94a0819fe3a0d679c3042a77bfe6a2afc505daea.zip |
Adding upstream version 1.66.0+dfsg1.upstream/1.66.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/test/ui/higher-rank-trait-bounds/issue-95034.rs | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/test/ui/higher-rank-trait-bounds/issue-95034.rs b/src/test/ui/higher-rank-trait-bounds/issue-95034.rs new file mode 100644 index 000000000..af4946a18 --- /dev/null +++ b/src/test/ui/higher-rank-trait-bounds/issue-95034.rs @@ -0,0 +1,80 @@ +// check-pass +// compile-flags: --edition=2021 --crate-type=lib + +use std::{ + future::Future, + marker::PhantomData, + pin::Pin, + task::{Context, Poll}, +}; + +mod object { + use super::*; + + pub trait Object<'a> { + type Error; + type Future: Future<Output = Self>; + fn create() -> Self::Future; + } + + impl<'a> Object<'a> for u8 { + type Error = (); + type Future = Pin<Box<dyn Future<Output = Self>>>; + fn create() -> Self::Future { + unimplemented!() + } + } + + impl<'a, E, A: Object<'a, Error = E>> Object<'a> for (A,) { + type Error = (); + type Future = CustomFut<'a, E, A>; + fn create() -> Self::Future { + unimplemented!() + } + } + + pub struct CustomFut<'f, E, A: Object<'f, Error = E>> { + ph: PhantomData<(A::Future,)>, + } + + impl<'f, E, A: Object<'f, Error = E>> Future for CustomFut<'f, E, A> { + type Output = (A,); + fn poll(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> { + unimplemented!() + } + } +} + +mod async_fn { + use super::*; + + pub trait AsyncFn { + type Future: Future<Output = ()>; + fn call(&self) -> Self::Future; + } + + impl<F, Fut> AsyncFn for F + where + F: Fn() -> Fut, + Fut: Future<Output = ()>, + { + type Future = Fut; + fn call(&self) -> Self::Future { + (self)() + } + } +} + +pub async fn test() { + use self::{async_fn::AsyncFn, object::Object}; + + async fn create<T: Object<'static>>() { + T::create().await; + } + + async fn call_async_fn(inner: impl AsyncFn) { + inner.call().await; + } + + call_async_fn(create::<(u8,)>).await; +} |