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Stabilize the re_rebalance_coherence
feature
#65879
Stabilize the re_rebalance_coherence
feature
#65879
Conversation
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☔ The latest upstream changes (presumably #65188) made this pull request unmergeable. Please resolve the merge conflicts. |
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Apparently the example used in the documentation for the This is the expected behavior (and one of the RFC's stated goals), but I don't know what to do with it (remove the example? change it to say that |
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amusing |
I wonder if this means that whole section can be removed, and we can just advice to always implement |
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This looks great! I left one suggestion for how to approach the docs -- I think we could be a bit more forceful -- but I'm also relatively happy as is.
@@ -220,21 +220,20 @@ pub trait AsMut<T: ?Sized> { | |||
/// | |||
/// # Implementing [`Into`] for conversions to external types | |||
/// | |||
/// If the destination type is not part of the current crate | |||
/// then you can't implement [`From`] directly. | |||
/// Prior to Rust 1.40, if the destination type was not part of the current crate |
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I think we should strengthen this -- unless we have a good example of when you do need to implement Into
, we should probably start by telling people to avoid implementing Into
directly, and then continue with this content?
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This should say 1.41 instead?
As far as I can tell, there is no reason to implement (I went to |
@nikomatsakis I changed the docs like you suggested! Let me know if there's anything else to do 😁 |
☔ The latest upstream changes (presumably #63803) made this pull request unmergeable. Please resolve the merge conflicts. |
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Co-Authored-By: Mazdak Farrokhzad <twingoow@gmail.com>
@bors r+ |
📌 Commit 3e0759d has been approved by |
@bors rollup=never p=3 |
…nikomatsakis Stabilize the `re_rebalance_coherence` feature This PR stabilizes [RFC 2451](https://rust-lang.github.io/rfcs/2451-re-rebalancing-coherence.html), re-rebalance coherence. Changes include removing the attribute from tests which tested both the old and new behavior, moving the feature to `accepted` and removing the old logic. I'll also open a [PR](rust-lang/reference#703) against the reference, updating it with the content of the RFC. Closes #63599 r? @nikomatsakis
☀️ Test successful - checks-azure |
Version 1.41.0 (2020-01-30) =========================== Language -------- - [You can now pass type parameters to foreign items when implementing traits.][65879] E.g. You can now write `impl<T> From<Foo> for Vec<T> {}`. - [You can now arbitrarily nest receiver types in the `self` position.][64325] E.g. you can now write `fn foo(self: Box<Box<Self>>) {}`. Previously only `Self`, `&Self`, `&mut Self`, `Arc<Self>`, `Rc<Self>`, and `Box<Self>` were allowed. - [You can now use any valid identifier in a `format_args` macro.][66847] Previously identifiers starting with an underscore were not allowed. - [Visibility modifiers (e.g. `pub`) are now syntactically allowed on trait items and enum variants.][66183] These are still rejected semantically, but can be seen and parsed by procedural macros and conditional compilation. Compiler -------- - [Rustc will now warn if you have unused loop `'label`s.][66325] - [Removed support for the `i686-unknown-dragonfly` target.][67255] - [Added tier 3 support\* for the `riscv64gc-unknown-linux-gnu` target.][66661] - [You can now pass an arguments file passing the `@path` syntax to rustc.][66172] Note that the format differs somewhat from what is found in other tooling; please see [the documentation][argfile-docs] for more information. - [You can now provide `--extern` flag without a path, indicating that it is available from the search path or specified with an `-L` flag.][64882] \* Refer to Rust's [platform support page][forge-platform-support] for more information on Rust's tiered platform support. [argfile-docs]: https://doc.rust-lang.org/nightly/rustc/command-line-arguments.html#path-load-command-line-flags-from-a-path Libraries --------- - [The `core::panic` module is now stable.][66771] It was already stable through `std`. - [`NonZero*` numerics now implement `From<NonZero*>` if it's a smaller integer width.][66277] E.g. `NonZeroU16` now implements `From<NonZeroU8>`. - [`MaybeUninit<T>` now implements `fmt::Debug`.][65013] Stabilized APIs --------------- - [`Result::map_or`] - [`Result::map_or_else`] - [`std::rc::Weak::weak_count`] - [`std::rc::Weak::strong_count`] - [`std::sync::Weak::weak_count`] - [`std::sync::Weak::strong_count`] Cargo ----- - [Cargo will now document all the private items for binary crates by default.][cargo/7593] - [`cargo-install` will now reinstall the package if it detects that it is out of date.][cargo/7560] - [Cargo.lock now uses a more git friendly format that should help to reduce merge conflicts.][cargo/7579] - [You can now override specific dependencies's build settings][cargo/7591] E.g. `[profile.dev.overrides.image] opt-level = 2` sets the `image` crate's optimisation level to `2` for debug builds. You can also use `[profile.<profile>.build_overrides]` to override build scripts and their dependencies. Misc ---- - [You can now specify `edition` in documentation code blocks to compile the block for that edition.][66238] E.g. `edition2018` tells rustdoc that the code sample should be compiled the 2018 edition of Rust. - [You can now provide custom themes to rustdoc with `--theme`, and check the current theme with `--check-theme`.][54733] - [You can use `#[cfg(doc)]` to compile an item when building documentation.][61351] Compatibility Notes ------------------- - [As previously announced 1.41.0 will be the last tier 1 release for 32-bit Apple targets.][apple-32bit-drop] This means that the source code is still available to build, but the targets are no longer being tested and release binaries for those platforms will no longer be distributed by the Rust project. Please refer to the linked blog post for more information. [54733]: rust-lang/rust#54733 [61351]: rust-lang/rust#61351 [67255]: rust-lang/rust#67255 [66661]: rust-lang/rust#66661 [66771]: rust-lang/rust#66771 [66847]: rust-lang/rust#66847 [66238]: rust-lang/rust#66238 [66277]: rust-lang/rust#66277 [66325]: rust-lang/rust#66325 [66172]: rust-lang/rust#66172 [66183]: rust-lang/rust#66183 [65879]: rust-lang/rust#65879 [65013]: rust-lang/rust#65013 [64882]: rust-lang/rust#64882 [64325]: rust-lang/rust#64325 [cargo/7560]: rust-lang/cargo#7560 [cargo/7579]: rust-lang/cargo#7579 [cargo/7591]: rust-lang/cargo#7591 [cargo/7593]: rust-lang/cargo#7593 [`Result::map_or_else`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.map_or_else [`Result::map_or`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.map_or [`std::rc::Weak::weak_count`]: https://doc.rust-lang.org/std/rc/struct.Weak.html#method.weak_count [`std::rc::Weak::strong_count`]: https://doc.rust-lang.org/std/rc/struct.Weak.html#method.strong_count [`std::sync::Weak::weak_count`]: https://doc.rust-lang.org/std/sync/struct.Weak.html#method.weak_count [`std::sync::Weak::strong_count`]: https://doc.rust-lang.org/std/sync/struct.Weak.html#method.strong_count [apple-32bit-drop]: https://blog.rust-lang.org/2020/01/03/reducing-support-for-32-bit-apple-targets.html
This PR stabilizes RFC 2451, re-rebalance coherence.
Changes include removing the attribute from tests which tested both the old and new behavior, moving the feature to
accepted
and removing the old logic.I'll also open a PR against the reference, updating it with the content of the RFC.
Closes #63599
r? @nikomatsakis