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Fix style nits discovered in reading code.
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Co-Authored-By: Gabriel Smith <yodaldevoid@users.noreply.github.com>
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Co-Authored-By: Gabriel Smith <yodaldevoid@users.noreply.github.com>
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This commit adds a suggestion when a import is duplicated (ie. the same name
is used twice trying to import the same thing) to remove the second
import.
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Add error for trailing angle brackets.
Fixes #54521.
This PR adds a error (and accompanying machine applicable
suggestion) for trailing angle brackets on function calls with a
turbofish.
r? @estebank
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resolves #57773
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This commit adds a error (and accompanying machine applicable
suggestion) for trailing angle brackets on function calls with a
turbofish.
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Continue parsing after parent type args and suggest using angle brackets
```
error[E0214]: parenthesized parameters may only be used with a trait
--> $DIR/E0214.rs:2:15
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LL | let v: Vec(&str) = vec!["foo"];
| ^^^^^^
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| only traits may use parentheses
| help: use angle brackets instead: `<&str>`
```
r? @zackmdavis
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Implement new literal type `Err`
Fixes #57384
I removed `return Ok`, otherwise, two errors occur. Any solutions?
r? @estebank
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Simplify `TokenStream` some more
These commits simplify `TokenStream`, remove `ThinTokenStream`, and avoid some clones. The end result is simpler code and a slight perf win on some benchmarks.
r? @petrochenkov
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`TokenStream` is now almost identical to `ThinTokenStream`. This commit
removes the latter, replacing it with the former.
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Because it's an extra type layer that doesn't really help; in a couple
of places it actively gets in the way, and overall removing it makes the
code nicer. It does, however, move `tokenstream::TokenTree` further away
from the `TokenTree` in `quote.rs`.
More importantly, this change reduces the size of `TokenStream` from 48
bytes to 40 bytes on x86-64, which is enough to slightly reduce
instruction counts on numerous benchmarks, the best by 1.5%.
Note that `open_tt` and `close_tt` have gone from being methods on
`Delimited` to associated methods of `TokenTree`.
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`CrateRoot` -> `PathRoot`, `::` doesn't necessarily mean crate root now
`SelfValue` -> `SelfLower`, `SelfType` -> `SelfUpper`, both `self` and `Self` can be used in type and value namespaces now
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Make `NodeId` and `HirLocalId` `newtype_index`
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And make them x86_64-only so they can use `==` instead of `<=`.
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Because it results in fewer allocations and small speedups on some
benchmarks.
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Suggest to remove prefix `b` in cfg attribute lint string
Closes #54926
r? @estebank
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Track whether module declarations are inline (fixes #12590)
To track whether module declarations are inline I added a field `inline: bool` to `ast::Mod`. The main use case is for pretty to know whether it should render the items associated with the module, but perhaps there are use cases for this information to not be forgotten in the AST.
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refactor match guard
This is the first step to implement RFC 2294: if-let-guard. Tracking issue: https://github.com/rust-lang/rust/issues/51114
The second step should be introducing another variant `IfLet` in the Guard enum. I separated them into 2 PRs for the convenience of reviewers.
r? @petrochenkov
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Implement try block expressions
I noticed that `try` wasn't a keyword yet in Rust 2018, so...
~~Fixes https://github.com/rust-lang/rust/issues/52604~~ That was fixed by PR https://github.com/rust-lang/rust/pull/53135
cc https://github.com/rust-lang/rust/issues/31436 https://github.com/rust-lang/rust/issues/50412
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(Not `Try` since `QuestionMark` is using that.)
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Move SmallVector and ThinVec out of libsyntax
- move `libsyntax::util::SmallVector` tests to `librustc_data_structures::small_vec`
- remove `libsyntax::util::SmallVector`
- move `libsyntax::util::thin_vec` to `librustc_data_structures::thin_vec`
Other than moving these data structures where they belong it allows modules using `SmallVector<T>` (`SmallVec<[T; 1]>`) to specify their own length (e.g. 8 or 32) independently from `libsyntax`.
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