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Update RELEASES.md 

Co-Authored-By: Jonas Schievink <jonasschievink@gmail.com>
Co-Authored-By: Mazdak Farrokhzad <twingoow@gmail.com>
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RELEASES.md
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@ -3,9 +3,6 @@ Version 1.42.0 (2020-03-12)
Language
--------
- [You can now use `#[repr(transparent)]` on univariant `enum`s.][68122] Meaning
that you can create an enum that has the exact layout and ABI of the type
it contains.
- [You can now use the slice pattern syntax with subslices.][67712] e.g.
```rust
fn foo(words: &[&str]) {
@ -16,18 +13,34 @@ Language
}
}
```
<!-- TODO -->
- [Merge `TraitItem` & `ImplItem into `AssocItem`][67131]
- [You can now use `#[repr(transparent)]` on univariant `enum`s.][68122] Meaning
that you can create an enum that has the exact layout and ABI of the type
it contains.
- [There are some *syntax-only* changes:][67131]
- `default` is syntactically allowed before items in `trait` definitions.
- Items in `impl`s (i.e. `const`s, `type`s, and `fn`s) may syntactically
leave out their bodies in favor of `;`.
- Bounds on associated types in `impl`s are now syntactically allowed
(e.g. `type Foo: Ord;`).
- `...` (the C-variadic type) may occur syntactically directly as the type of
any function parameter.
These are still rejected *semantically*, so you will likely receive an error
but these changes can be seen and parsed by procedural macros and
conditional compilation.
Compiler
--------
- [Added tier 3\* support for `armv7a-none-eabi`.][68253]
- [Added tier 3 support for `riscv64gc-unknown-linux-gnu`.][68037]
- [Added tier 2\* support for `armv7a-none-eabi`.][68253]
- [Added tier 2 support for `riscv64gc-unknown-linux-gnu`.][68339]
- [`Option::{expect,unwrap}` and
`Result::{expect, expect_err, unwrap, unwrap_err}` now produce panic messages
pointing to the location where they were called, rather than
`core`'s internals. ][67887]
\* Refer to Rust's [platform support page][forge-platform-support] for more
information on Rust's tiered platform support.
Libraries
---------
- [`iter::Empty<T>` now implements `Send` and `Sync` for any `T`.][68348]
@ -40,14 +53,14 @@ Libraries
Stabilized APIs
---------------
- [`CondVar::wait_while`]
- [`CondVar::wait_timeout_while`]
- [`DebugMap::key`]
- [`DebugMap::value`]
- [`ManuallyDrop::take`]
- [`matches!`]
- [`ptr::slice_from_raw_parts_mut`]
- [`ptr::slice_from_raw_parts`]
- [`wait_timeout_while`]
- [`wait_while`]
Cargo
-----
@ -62,7 +75,7 @@ Compatibility Notes
[68253]: https://github.com/rust-lang/rust/pull/68253/
[68348]: https://github.com/rust-lang/rust/pull/68348/
[67935]: https://github.com/rust-lang/rust/pull/67935/
[68037]: https://github.com/rust-lang/rust/pull/68037/
[68339]: https://github.com/rust-lang/rust/pull/68339/
[68122]: https://github.com/rust-lang/rust/pull/68122/
[67712]: https://github.com/rust-lang/rust/pull/67712/
[67887]: https://github.com/rust-lang/rust/pull/67887/
@ -78,7 +91,8 @@ Compatibility Notes
[`matches!`]: https://doc.rust-lang.org/stable/std/macro.matches.html
[`ptr::slice_from_raw_parts_mut`]: https://doc.rust-lang.org/stable/std/ptr/fn.slice_from_raw_parts_mut.html
[`ptr::slice_from_raw_parts`]: https://doc.rust-lang.org/stable/std/ptr/fn.slice_from_raw_parts.html
[`wait_while`]: https://doc.rust-lang.org/stable/std/sync/struct.Condvar.html#method.wait_while
[`CondVar::wait_while`]: https://doc.rust-lang.org/stable/std/sync/struct.Condvar.html#method.wait_while
[`CondVar::wait_timeout_while`]: https://doc.rust-lang.org/stable/std/sync/struct.Condvar.html#method.wait_timeout_while
Version 1.41.0 (2020-01-30)