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This stabilises RFC 2086 (https://github.com/rust-lang/rust/issues/44495).
Co-Authored-By: Sebastian Malton <sebastian@malton.name>
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Fix repeated word typos
Inspired by #57295 (I skipped 'be be' because of it) and my [PR in another repo
](https://github.com/e-maxx-eng/e-maxx-eng/pull/389)
Not a stupid `sed`, I actually tried to fix case by case.
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Implement the Re-rebalance coherence RFC
This is the first time I touch anything in the compiler so just tell me if I got something wrong.
Big thanks to @sgrif for the pointers where to look for those things.
cc #55437
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Link to rustc guide
As proposed in https://github.com/rust-lang-nursery/rustc-guide/issues/239
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Co-Authored-By: weiznich <Georg_semmler_05@web.de>
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Found with `git grep -P '\b([a-z]+)\s+\1\b'`
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remove more copyright headers
r? @Mark-Simulacrum
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Implement RFC 2338, "Type alias enum variants"
This PR implements [RFC 2338](https://github.com/rust-lang/rfcs/pull/2338), allowing one to write code like the following.
```rust
#![feature(type_alias_enum_variants)]
enum Foo {
Bar(i32),
Baz { i: i32 },
}
type Alias = Foo;
fn main() {
let t = Alias::Bar(0);
let t = Alias::Baz { i: 0 };
match t {
Alias::Bar(_i) => {}
Alias::Baz { i: _i } => {}
}
}
```
Since `Self` can be considered a type alias in this context, it also enables using `Self::Variant` as both a constructor and pattern.
Fixes issues #56199 and #56611.
N.B., after discussing the syntax for type arguments on enum variants with @petrochenkov and @eddyb (there are also a few comments on the [tracking issue](https://github.com/rust-lang/rust/issues/49683)), the consensus seems to be treat the syntax as follows, which ought to be backwards-compatible.
```rust
Option::<u8>::None; // OK
Option::None::<u8>; // OK, but lint in near future (hard error next edition?)
Alias::<u8>::None; // OK
Alias::None::<u8>; // Error
```
I do not know if this will need an FCP, but let's start one if so.
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Issue #28979 was closed with a link to #55467.
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docs(rustc): make hello() public
Running the example code [here](https://doc.rust-lang.org/rustc/what-is-rustc.html#basic-usage) throws error:
```
error[E0603]: function `hello` is private
--> src/main.rs:4:10
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4 | foo::hello();
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```
Making `hello()` public fixes the problem.
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Stabilize #[repr(packed(N))]
Fixes https://github.com/rust-lang/rust/issues/33158
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Stabilize `linker-flavor` flag.
Part of #55396.
This commit moves the linker-flavor flag from a debugging option to a
codegen option, thus stabilizing it. There are no feature flags
associated with this flag.
r? @nagisa
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This commit moves the linker-flavor flag from a debugging option to a
codegen option, thus stabilizing it. There are no feature flags
associated with this flag.
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Update the book to fix some edition-related bugs
I'd love to have this included in a point release if one happens, but the changes aren't worth doing a point release on their own IMO. I'd definitely like to see this backported to beta.
The most urgent changes included here are:
- Chapter 19.6, on macros (including the macro changes that just stabilized), [is cut off](https://github.com/rust-lang/book/issues/1668) because of an ill-placed newline in a comment that [pulldown-cmark interprets incorrectly](https://github.com/raphlinus/pulldown-cmark/issues/124).
- [The `Cargo.toml` shown in the Guessing Game example in Chapter 2 (and one in Chapter 14) doesn't have `edition="2018"`](https://github.com/rust-lang/book/pull/1671), which can be confusing depending on whether the readers have it in theirs or not, think they should remove it if they have it, and the rest of the chapter assumes it's there and the code doesn't compile if you don't have it.
- The redirects implemented as part of only shipping the 2018 edition of the book sometimes lead to [having to click through 2 redirect pages](https://github.com/rust-lang/book/pull/1667) when it could be just one.
There are other small corrections included that were made since the last time the book was updated, but those aren't urgent.
cc @steveklabnik
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and update it so that links are correct
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Fix failing tidy (line endings on Windows)
Updates to `rustc-guide` and `edition-guide` including https://github.com/rust-lang/rustc-guide/pull/246 and https://github.com/rust-lang-nursery/edition-guide/pull/122.
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Improve the unstable book example for #[marker] trait
The previous one didn't actually use the Display&Debug bounds in any way, so I think this one is a bit more meaningful.
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The previous one didn't actually use the Display&Debug bounds in any way, so I think this one is a bit more meaningful.
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Stabilize self_struct_ctor feature.
[**Tracking Issue**](https://github.com/rust-lang/rust/issues/51994)
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rustc-guide has moved to rust-lang/
r? @nikomatsakis
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Add rustc-guide as a submodule
Adding this as a submodule will allow two things:
- Linking to the guide from doc.rlo
- Doing a link check as part of the rust CI build
Key question: Do we want to wait for the book to be filled out more? e.g. do we ever want to move it out of the nursery?
r? @nikomatsakis
cc @steveklabnik
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Reduce the amount of bold text at doc.rlo
Currently, all of the text is either huge or small. IMHO this is hard to read, so I propose that we make the second-level headings smaller, without making them any less prominent.
# Before:
# After:
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Stabilize macro_literal_matcher
This followed FCP in #35625.
Closes #35625
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Check arg/ret sizedness at ExprKind::Path
This PR solves three problems:
- #50940: ICE on casting unsized tuple struct constructors
- Unsized tuple struct constructors were callable in presence of `unsized_locals`.
- https://github.com/rust-lang/rust/issues/48055#issuecomment-437178966: we cannot relax `Sized` bounds on stable functions because of fn ptr casting
These are caused by lack of `Sized`ness checks for arguments/retvals at **reference sites of `FnDef` items** (not call sites of the functions). Therefore we can basically add more `Sized` obligations on typeck. However, adding `Sized` obligations arbitrarily breaks type inference; to prevent that I added a new method `require_type_is_sized_deferred` which doesn't interfere usual type inference.
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