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Rollup merge of #115210 - DogPawHat:std-agnostic-rustc_on_unimplemented-for-alloc-rc, r=WaffleLapkin

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Make `rustc_on_unimplemented` std-agnostic for `alloc::rc`

See https://github.com/rust-lang/rust/issues/112923

Just a few lines related to `alloc:rc` for `Send` and `Sync`.

That seems to be all of the `... = "std::..."` issues found, but there a few notes with `std::` inside them still.

r? `@WaffleLapkin`
This commit is contained in:
Matthias Krüger 2023-08-26 13:08:34 +02:00 committed by GitHub
commit c3668d3d7c
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library/core/src/marker.rs
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@ -77,6 +77,7 @@ macro marker_impls {
#[cfg_attr(not(test), rustc_diagnostic_item = "Send")]
#[rustc_on_unimplemented(
on(_Self = "std::rc::Rc<T, A>", note = "use `std::sync::Arc` instead of `std::rc::Rc`"),
on(_Self = "alloc::rc::Rc<T, A>", note = "use `alloc::sync::Arc` instead of `alloc::rc::Rc`"),
message = "`{Self}` cannot be sent between threads safely",
label = "`{Self}` cannot be sent between threads safely",
note = "consider using `std::sync::Arc<{Self}>`; for more information visit \
@ -632,6 +633,7 @@ impl<T: ?Sized> Copy for &T {}
note = "if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead",
),
on(_Self = "std::rc::Rc<T, A>", note = "use `std::sync::Arc` instead of `std::rc::Rc`"),
on(_Self = "alloc::rc::Rc<T, A>", note = "use `alloc::sync::Arc` instead of `alloc::rc::Rc`"),
message = "`{Self}` cannot be shared between threads safely",
label = "`{Self}` cannot be shared between threads safely",
note = "consider using `std::sync::Arc<{Self}>`; for more information visit \