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Auto merge of rust-lang#103714 - matthiaskrgr:rollup-kajt3i8, r=matth…
…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#102961 (Make `CStr::from_ptr` `const`.) - rust-lang#103342 (Add test for issue 98634) - rust-lang#103383 (Note scope of TAIT more accurately) - rust-lang#103656 (Specialize ToString for Symbol) - rust-lang#103663 (rustdoc: remove redundant CSS/DOM `div.search-container`) - rust-lang#103664 (rustdoc-json-types: Improve ItemSummary::path docs) - rust-lang#103704 (Add a test for TAIT used with impl/dyn Trait inside RPIT) Failed merges: - rust-lang#103618 (Rename some `OwnerId` fields.) r? `@ghost` `@rustbot` modify labels: rollup
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| // edition: 2021 | ||
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| use std::{ | ||
| future::Future, | ||
| pin::Pin, | ||
| task::{Context, Poll, Waker}, | ||
| }; | ||
|
|
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| pub struct StructAsync<F: Fn() -> Pin<Box<dyn Future<Output = ()>>>> { | ||
| pub callback: F, | ||
| } | ||
|
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| impl<F> Future for StructAsync<F> | ||
| where | ||
| F: Fn() -> Pin<Box<dyn Future<Output = ()>>>, | ||
| { | ||
| type Output = (); | ||
|
|
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| fn poll(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Self::Output> { | ||
| Poll::Pending | ||
| } | ||
| } | ||
|
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| async fn callback() {} | ||
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| struct Runtime; | ||
|
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| fn waker() -> &'static Waker { | ||
| todo!() | ||
| } | ||
|
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| impl Runtime { | ||
| #[track_caller] | ||
| pub fn block_on<F: Future>(&self, mut future: F) -> F::Output { | ||
| loop { | ||
| unsafe { | ||
| Pin::new_unchecked(&mut future).poll(&mut Context::from_waker(waker())); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| fn main() { | ||
| Runtime.block_on(async { | ||
| StructAsync { callback }.await; | ||
| //~^ ERROR expected `fn() -> impl Future<Output = ()> {callback}` to be a fn item that returns `Pin<Box<(dyn Future<Output = ()> + 'static)>>`, but it returns `impl Future<Output = ()>` | ||
| //~| ERROR expected `fn() -> impl Future<Output = ()> {callback}` to be a fn item that returns `Pin<Box<(dyn Future<Output = ()> + 'static)>>`, but it returns `impl Future<Output = ()>` | ||
| //~| ERROR expected `fn() -> impl Future<Output = ()> {callback}` to be a fn item that returns `Pin<Box<(dyn Future<Output = ()> + 'static)>>`, but it returns `impl Future<Output = ()>` | ||
| }); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| error[E0271]: expected `fn() -> impl Future<Output = ()> {callback}` to be a fn item that returns `Pin<Box<(dyn Future<Output = ()> + 'static)>>`, but it returns `impl Future<Output = ()>` | ||
| --> $DIR/issue-98634.rs:45:23 | ||
| | | ||
| LL | StructAsync { callback }.await; | ||
| | ^^^^^^^^ expected struct `Pin`, found opaque type | ||
| | | ||
| note: while checking the return type of the `async fn` | ||
| --> $DIR/issue-98634.rs:24:21 | ||
| | | ||
| LL | async fn callback() {} | ||
| | ^ checked the `Output` of this `async fn`, found opaque type | ||
| = note: expected struct `Pin<Box<(dyn Future<Output = ()> + 'static)>>` | ||
| found opaque type `impl Future<Output = ()>` | ||
| note: required by a bound in `StructAsync` | ||
| --> $DIR/issue-98634.rs:9:35 | ||
| | | ||
| LL | pub struct StructAsync<F: Fn() -> Pin<Box<dyn Future<Output = ()>>>> { | ||
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `StructAsync` | ||
|
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| error[E0271]: expected `fn() -> impl Future<Output = ()> {callback}` to be a fn item that returns `Pin<Box<(dyn Future<Output = ()> + 'static)>>`, but it returns `impl Future<Output = ()>` | ||
| --> $DIR/issue-98634.rs:45:9 | ||
| | | ||
| LL | StructAsync { callback }.await; | ||
| | ^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `Pin`, found opaque type | ||
| | | ||
| note: while checking the return type of the `async fn` | ||
| --> $DIR/issue-98634.rs:24:21 | ||
| | | ||
| LL | async fn callback() {} | ||
| | ^ checked the `Output` of this `async fn`, found opaque type | ||
| = note: expected struct `Pin<Box<(dyn Future<Output = ()> + 'static)>>` | ||
| found opaque type `impl Future<Output = ()>` | ||
| note: required by a bound in `StructAsync` | ||
| --> $DIR/issue-98634.rs:9:35 | ||
| | | ||
| LL | pub struct StructAsync<F: Fn() -> Pin<Box<dyn Future<Output = ()>>>> { | ||
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `StructAsync` | ||
|
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| error[E0271]: expected `fn() -> impl Future<Output = ()> {callback}` to be a fn item that returns `Pin<Box<(dyn Future<Output = ()> + 'static)>>`, but it returns `impl Future<Output = ()>` | ||
| --> $DIR/issue-98634.rs:45:33 | ||
| | | ||
| LL | StructAsync { callback }.await; | ||
| | ^^^^^^ expected struct `Pin`, found opaque type | ||
| | | ||
| note: while checking the return type of the `async fn` | ||
| --> $DIR/issue-98634.rs:24:21 | ||
| | | ||
| LL | async fn callback() {} | ||
| | ^ checked the `Output` of this `async fn`, found opaque type | ||
| = note: expected struct `Pin<Box<(dyn Future<Output = ()> + 'static)>>` | ||
| found opaque type `impl Future<Output = ()>` | ||
| note: required by a bound in `StructAsync` | ||
| --> $DIR/issue-98634.rs:9:35 | ||
| | | ||
| LL | pub struct StructAsync<F: Fn() -> Pin<Box<dyn Future<Output = ()>>>> { | ||
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `StructAsync` | ||
|
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| error: aborting due to 3 previous errors | ||
|
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| For more information about this error, try `rustc --explain E0271`. |
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