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Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
Co-authored-by: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
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13
RELEASES.md
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@ -4,10 +4,10 @@ Version 1.49.0 (2020-11-19)
Language
-----------------------
- [Unions now implement `Drop`, and you can now have a field in a union
- [Unions can now implement `Drop`, and you can now have a field in a union
with `ManuallyDrop<T>`.][77547]
- [You can now cast zero sized enums (0 or 1 variants) integers.][76199]
- [You can now take bind by reference and by move in patterns.][76119] This
- [You can now cast zero sized enums (0 or 1 variants) to integers.][76199]
- [You can now bind by reference and by move in patterns.][76119] This
allows you to selectively borrow individual components of a type. E.g.
```rust
#[derive(Debug)]
@ -25,7 +25,7 @@ Language
let Person { name, ref age } = person;
println!("{} {}", name, age);
```
- [Macros that end with a semi-colon are now treated as statements.][78376]
- [Macros that end with a semi-colon are now treated as statements even if they expand to nothing.][78376]
Compiler
-----------------------
@ -74,7 +74,8 @@ Compatibility Notes
-------------------
- [Demoted `i686-unknown-freebsd` to tier 2 support.][78746]
- [Rustc will now check for the validity of attributes on enum variants.][77015]
- [Rustc will now check for the validity of some built-in attributes on enum variants.][77015]
Previously such invalid or unused attributes could be ignored.
Previously invalid or unused attributes were ignored.
Internal Only
@ -83,7 +84,7 @@ These changes provide no direct user facing benefits, but represent significant
improvements to the internals and overall performance of rustc and
related tools.
- [rustc's internal crates are now compiled the `initial-exec` Thread
- [rustc's internal crates are now compiled using the `initial-exec` Thread
Local Storage model.][78201]
- [Calculate visibilities once in resolve.][78077]
- [Added `system` to the `llvm-libunwind` bootstrap config option.][77703]