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Rollup merge of #88694 - Mark-Simulacrum:relnotes, r=Mark-Simulacrum

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Drop 1.56 stabilizations from 1.55 release notes

r? `@Mark-Simulacrum`
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Jack Huey 2021-09-08 12:24:20 -04:00 • committed by GitHub
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RELEASES.md
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@ -10,8 +10,7 @@ Language
Compiler Compiler
-------- --------
- [Added tier 3\* support for `powerpc-unknown-freebsd`.][87370] - [Added tier 3\* support for `powerpc64le-unknown-freebsd`.][83572]
- [Added tier 3 support for `powerpc64le-unknown-freebsd`.][83572]
\* Refer to Rust's [platform support page][platform-support-doc] for more \* Refer to Rust's [platform support page][platform-support-doc] for more
information on Rust's tiered platform support. information on Rust's tiered platform support.
@ -24,17 +23,6 @@ Libraries
no longer reject certain valid floating point values, and reduce no longer reject certain valid floating point values, and reduce
the produced code size for non-stripped artifacts. the produced code size for non-stripped artifacts.
- [`string::Drain` now implements `AsRef<str>` and `AsRef<[u8]>`.][86858] - [`string::Drain` now implements `AsRef<str>` and `AsRef<[u8]>`.][86858]
- [`collections::{BinaryHeap, BTreeSet, HashSet, LinkedList, VecDeque}` now
implement `From<[T; N]>`.][84111]
- [`collections::{BTreeMap, HashMap}` now implement `From<[(K, V); N]>`.][84111]
This allows you to write the following;
```rust
let highscores = std::collections::HashMap::from([
("Alice", 9000u32),
("Bob", 7250),
("Charlie", 5500),
]);
```
Stabilised APIs Stabilised APIs
--------------- ---------------
@ -60,7 +48,6 @@ Stabilised APIs
The following previously stable functions are now `const`. The following previously stable functions are now `const`.
- [`str::from_utf8_unchecked`] - [`str::from_utf8_unchecked`]
- [`mem::transmute`]
Cargo Cargo
@ -131,7 +118,6 @@ Compatibility Notes
[`MaybeUninit::assume_init_ref`]: https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#method.assume_init_ref [`MaybeUninit::assume_init_ref`]: https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#method.assume_init_ref
[`MaybeUninit::write`]: https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#method.write [`MaybeUninit::write`]: https://doc.rust-lang.org/stable/std/mem/union.MaybeUninit.html#method.write
[`Seek::rewind`]: https://doc.rust-lang.org/stable/std/io/trait.Seek.html#method.rewind [`Seek::rewind`]: https://doc.rust-lang.org/stable/std/io/trait.Seek.html#method.rewind
[`mem::transmute`]: https://doc.rust-lang.org/stable/std/mem/fn.transmute.html
[`ops::ControlFlow`]: https://doc.rust-lang.org/stable/std/ops/enum.ControlFlow.html [`ops::ControlFlow`]: https://doc.rust-lang.org/stable/std/ops/enum.ControlFlow.html
[`str::from_utf8_unchecked`]: https://doc.rust-lang.org/stable/std/str/fn.from_utf8_unchecked.html [`str::from_utf8_unchecked`]: https://doc.rust-lang.org/stable/std/str/fn.from_utf8_unchecked.html
[`x86::_bittest`]: https://doc.rust-lang.org/stable/core/arch/x86/fn._bittest.html [`x86::_bittest`]: https://doc.rust-lang.org/stable/core/arch/x86/fn._bittest.html