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Move clean types into their own file
This PR is just about moving clean types into their own files to make the code more clear and keep all `Clean` trait implementations on their own.
r? @kinnison
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Remove potential cfgs duplicates
Fixes https://github.com/rust-lang/rust/issues/66921.
Before going any further (the issue seems to be linked to metadata as far as I can tell). Do you think this is the good place to do it or should it be done before?
r? @eddyb
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Feature gating *declarations* => new crate `rustc_feature`
This PR moves the data-oriented parts of feature gating into its own crate, `rustc_feature`.
The parts consist of some data types as well as `accepted`, `active`, `removed`, and `builtin_attrs`.
Feature gate checking itself remains in `syntax::feature_gate::check`. The parts which define how to emit feature gate errors could probably be moved to `rustc_errors` or to the new `rustc_session` crate introduced in #66878. The visitor itself could probably be moved as a pass in `rustc_passes` depending on how the dependency edges work out.
The PR also contains some drive-by cleanup of feature gate checking. As such, the PR probably best read commit-by-commit.
r? @oli-obk
cc @petrochenkov
cc @Mark-Simulacrum
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support issue = "none" in unstable attributes
This works towards fixing #41260.
This PR allows the use of `issue = "none"` in unstable attributes and makes changes to internally store the issue number as an `Option<NonZeroU32>`. For example:
```rust
#[unstable(feature = "unstable_test_feature", issue = "none")]
fn unstable_issue_none() {}
```
It was not made optional because feedback seen here #60860 suggested that people might forget the issue field if it was optional.
I could not remove the current uses of `issue = "0"` (of which there are a lot) because the stage 0 compiler expects the old syntax. Once this is available in the stage 0 compiler we can replace all uses of `"0"` with `"none"` and no longer allow `"0"`. This is my first time contributing, so I'm not sure what the protocol is with two-part things like this, so some guidance would be appreciated.
r? @varkor
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- Use `Option<NonZeroU32>` to represent issue numbers.
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Revert two unapproved changes to rustc_typeck.
There was a breakdown in process (https://github.com/rust-lang/rust/pull/59004#issuecomment-477600735, https://github.com/rust-lang/rust/pull/58894#discussion_r272795560) and two changes were made to `rustc_typeck`'s "collect" queries, for rustdoc, that were neither needed *nor* correct.
I'm reverting them here, and will fix up rustdoc *somehow*, if necessary.
cc @rust-lang/compiler How do we ensure this doesn't happen again?
r? @nikomatsakis or @oli-obk
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`AttrKind` is a new type with two variants, `Normal` and `DocComment`. It's a
big performance win (over 10% in some cases) because `DocComment` lets doc
comments (which are common) be represented very cheaply.
`Attribute` gets some new helper methods to ease the transition:
- `has_name()`: check if the attribute name matches a single `Symbol`; for
`DocComment` variants it succeeds if the symbol is `sym::doc`.
- `is_doc_comment()`: check if it has a `DocComment` kind.
- `{get,unwrap}_normal_item()`: extract the item from a `Normal` variant;
panic otherwise.
Fixes #60935.
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This reverts commit 64382f4b78bdca6bea1dd06e4a1039646b04ae93.
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Including removing a bunch of unnecessary `.as_str()` calls, and a bunch
of unnecessary sigils.
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This is done by moving some data definitions to syntax::expand.
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Redesign the interface to the unikernel HermitCore
We are developing the unikernel HermitCore, where the kernel is written in Rust and is already part of the Rust Standard Library. The interface between the standard library and the kernel based on a small C library. With this pull request, we remove completely the dependency to C and use lld as linker. Currently, the kernel will be linked to the application as static library, which is published at https://github.com/hermitcore/libhermit-rs.
We don’t longer support the C interface to the kernel. Consequently, we remove this part from the Rust Standard Library.
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move Attribute::with_desugared_doc to librustdoc
From https://github.com/rust-lang/rust/pull/65324.
r? @varkor
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Co-Authored-By: David Wood <Q0KPU0H1YOEPHRY1R2SN5B5RL@david.davidtw.co>
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Remove `InternedString`
This PR removes `InternedString` by converting all occurrences to `Symbol`. There are a handful of places that need to use the symbol chars instead of the symbol index, e.g. for stable sorting; local conversions `LocalInternedString` is used in those places.
r? @eddyb
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This avoids the needs for various conversions, and makes the code
slightly faster, because `Symbol` comparisons and hashing is faster.
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rustc: arena-allocate the slice in `ty::GenericsPredicate`, not the whole struct.
While rebasing #59789 I noticed we can do this now. However, it doesn't help much without changing `inferred_outlives_of` to the same type, which I might try next.
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struct.
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