Per [RFC 3309](https://rust-lang.github.io/rfcs/3309-style-team.html).

Co-authored-by: Nathan Stocks <cleancut@github.com>
Co-authored-by: rdvdev2 <rdvdev2@gmail.com>

…son error

Add `Noted` marker struct that implements `EmissionGuarantee` so that
`emit_note` and `create_note` can be implemented for struct diagnostics.

Signed-off-by: David Wood <david.wood@huawei.com>

…rror

Since 98f05a0 removed separate colors
from the currently-selected item, there's no need to have item classes on
sidebar links.

Since 98f05a0 and
b5963f0 removed color classes from sidebar
items, there's no need for the selectors to be so specific any more.

This commit does have to change `h1.fqn a` to just be `h1 a`, so that the
header link color selector is less specific than the typed link at the end.
Since rust-lang#89506 made docblocks start at `h2`, the main page link header should
be the only h1 in the page now.

…nostics, r=davidtwco

Migrate rustc_passes diagnostics

Picks up abandoned work from rust-lang#100870

I would like to do this collaboratively, as there is a lot of work! Here's the process:

- Comment below that you are willing to help and I will add you as a collaborator to my `rust` fork (that gives you write access)
- Indicate which file/task you would like to work on (so we don't duplicate work) from the list below
- Do the work, push up a commit, comment that you're done with that file/task
- Repeat until done 😄

### Files to Migrate (in `compiler/rustc_passes/src/`)

- [x] check_attr.rs ``@CleanCut``
- [x] check_const.rs ``@CleanCut``
- [x] dead.rs ``@CleanCut``
- [x] debugger_visualizer.rs ``@CleanCut``
- [x] diagnostic_items.rs ``@CleanCut``
- [x] entry.rs ``@CleanCut``
- [x] lang_items.rs ``@CleanCut``
- [x] layout_test.rs ``@CleanCut``
- [x] lib_features.rs ``@CleanCut``
- [x] ~liveness.rs~ ``@CleanCut`` Nothing to do
- [x] loops.rs ``@CleanCut``
- [x] naked_functions.rs ``@CleanCut``
- [x] stability.rs ``@CleanCut``
- [x] weak_lang_items.rs ``@CleanCut``

### Tasks

- [x] Rebase on current `master` ``@CleanCut``
- [x] Review work from [the earlier PR](rust-lang#100870) and make sure it all looks good
  - [x] compiler/rustc_error_messages/locales/en-US/passes.ftl ``@CleanCut``
  - [x] compiler/rustc_passes/src/check_attr.rs ``@CleanCut``
  - [x] compiler/rustc_passes/src/errors.rs ``@CleanCut``
  - [x] compiler/rustc_passes/src/lang_items.rs ``@CleanCut``
  - [x] compiler/rustc_passes/src/lib.rs ``@CleanCut``
  - [x] compiler/rustc_passes/src/weak_lang_items.rs ``@CleanCut``

…r=eholk

Use correct location for type tests in promoted constants

Previously we forgot to remap the location in a type test collected when visiting the body of a promoted constant back to the usage location, causing an ICE when trying to get span information for that type test.

Fixes rust-lang#102117

…artwright

Move style guide to rust-lang/rust

Per [RFC 3309](https://rust-lang.github.io/rfcs/3309-style-team.html).

Panic for invalid arguments of `{integer primitive}::ilog{,2,10}` in all modes

Decision made in rust-lang#100422 (comment)

resolves rust-lang#100422

tracking issue: rust-lang#70887

r? `@m-ou-se`

Use memset to initialize readbuf

The write loop was found to be slow in rust-lang#102727

The proper fix is in rust-lang#102760 but this might still help debug builds and code running under miri by using the write_bytes intrinsic instead of writing one byte at a time.

…ity, r=cjgillot

Check representability in adt_sized_constraint

Now that representability is a query, we can use it to preemptively avoid a cycle in `adt_sized_constraint`.

I moved the representability check into `check_mod_type_wf` to avoid a scenario where rustc quits before checking all the types for representability. This also removes the check from rustdoc, which is alright AFAIK.

r? ``@cjgillot``

…piler-errors

unify `IsPattern` and `IsImport` enum in `show_candidates`

Follow-up of rust-lang#102876
A binding cannot appear in both pattern and import at the same time, so it makes sense to unify them
r? `@compiler-errors`

…lass, r=GuillaumeGomez

rustdoc: remove unused classes from sidebar links

Since rust-lang@98f05a0 removed separate colors from the currently-selected item, there's no need to have item classes on sidebar links.

Preview: https://notriddle.com/notriddle-rustdoc-demos/sidebar-link-class/std/vec/struct.Vec.html

While cleaning up the CSS to remove unneeded `.content` selectors, this PR changes the `h1.fqn a` CSS selector to just be `h1 a`, so that the header link color selector is less specific than the typed link at the end. Since rust-lang#89506 made docblocks start at `h2`, the main page link header should be the only h1 in the page now.