- Rename `broken_intra_doc_links` to `rustdoc::broken_intra_doc_links`
- Ensure that the old lint names still work and give deprecation errors
- Register lints even when running doctests

  Otherwise, all `rustdoc::` lints would be ignored.

- Register all existing lints as removed

  This unfortunately doesn't work with `register_renamed` because tool
  lints have not yet been registered when rustc is running. For similar
  reasons, `check_backwards_compat` doesn't work either. Call
  `register_removed` directly instead.

- Fix fallout

  + Rustdoc lints for compiler/
  + Rustdoc lints for library/

Note that this does *not* suggest `rustdoc::broken_intra_doc_links` for
`rustdoc::intra_doc_link_resolution_failure`, since there was no time
when the latter was valid.

- Use `register_renamed` when rustdoc is running so the lint will still
  be active and use a structured suggestion
- Test the behavior for rustc, not just for rustdoc (because it differs)

- Move MISSING_CRATE_LEVEL_DOCS to rustdoc directly
- Update documentation

This also takes the opportunity to make the `no-crate-level-doc-lint`
test more specific.

Note that the FIXME was removed because this can't be fixed,
`register_renamed` calls LintId::of and there's no LintId for rustdoc
lints when rustc is running.

See rust-lang#82379 (comment)

WASI's `filestat` type includes a size field, so expose it in
`MetadataExt` via a `size()` function, similar to the corresponding Unix
function.

This adds API documentation support for `std::os::wasi` modeled after
how `std::os::unix` works, so that WASI can be documented [here] along
with the other platforms.

[here]: https://doc.rust-lang.org/stable/std/os/index.html

Two changes of particular interest:

 - This changes the `AsRawFd` for `io::Stdin` for WASI to return
   `libc::STDIN_FILENO` instead of `sys::stdio::Stdin.as_raw_fd()` (and
   similar for `Stdout` and `Stderr`), which matches how the `unix`
   version works. `STDIN_FILENO` etc. may not always be explicitly
   reserved at the WASI level, but as long as we have Rust's `std` and
   `libc`, I think it's reasonable to guarantee that we'll always use
   `libc::STDIN_FILENO` for stdin.

 - This duplicates the `osstr2str` utility function, rather than
   trying to share it across all the configurations that need it.

Fixes rust-lang#82438

This map is not guarnateed to have an entry for a closure.

Co-authored-by: Nathan Nguyen <43092380+nhwn@users.noreply.github.com>

WASI's `RawFd` is a `u32`, while `libc` uses `c_int`.

This ensures that these names resolve to the right place even when
building the WASI support on other platforms for generating the
documentation.

As suggested by GuillaumeGomez

Make rustdoc lints a tool lint instead of built-in

- Rename `broken_intra_doc_links` to `rustdoc::broken_intra_doc_links` (and similar for other rustdoc lints; I don't expect any others to be used frequently, though).
- Ensure that the old lint names still work and give deprecation errors
- Register lints even when running doctests
- Move lint machinery into a separate file
- Add `declare_rustdoc_lint!` macro

Unblocks rust-lang#80300, rust-lang#79816, rust-lang#80965. Makes the strangeness in rust-lang#77364 more apparent to the end user (note that `missing_docs` is *not* moved to rustdoc in this PR).

## Current status

This is waiting on FCP: rust-lang#80527 (comment)

…sue, r=camelid

update tracking issue for `relaxed_struct_unsize`

forgot to do this before rust-lang#80726 got merged. The tracking issue is rust-lang#81793

…leywiser

Replace const_cstr with cstr crate

This PR replaces the `const_cstr` macro inside `rustc_data_structures` with `cstr` macro from [cstr](https://crates.io/crates/cstr) crate.

The two macros basically serve the same purpose, which is to generate `&'static CStr` from a string literal. `cstr` is better because it validates the literal at compile time, while the existing `const_cstr` does it at runtime when `debug_assertions` is enabled. In addition, the value `cstr` generates can be used in constant context (which is seemingly not needed anywhere currently, though).

…onymous-lifetime, r=estebank

Improve anonymous lifetime note to indicate the target span

Improvement for  rust-lang#81650
Cc rust-lang#81995

Message after this improvement:
(Improve note in the middle)

```
error[E0311]: the parameter type `T` may not live long enough
  --> src/main.rs:25:11
   |
24 | fn play_with<T: Animal + Send>(scope: &Scope, animal: T) {
   |              -- help: consider adding an explicit lifetime bound...: `T: 'a +`
25 |     scope.spawn(move |_| {
   |           ^^^^^
   |
note: the parameter type `T` must be valid for the anonymous lifetime defined on the function body at 24:40...
  --> src/main.rs:24:40
   |
24 | fn play_with<T: Animal + Send>(scope: &Scope, animal: T) {
   |                                        ^^^^^
note: ...so that the type `[closure@src/main.rs:25:17: 27:6]` will meet its required lifetime bounds
  --> src/main.rs:25:11
   |
25 |     scope.spawn(move |_| {
   |           ^^^^^
```

r? `````@estebank`````

…=jonas-schievink

⬆️ rust-analyzer

Add Future trait for doc_spotlight feature doc

…mps, r=petrochenkov

Test hexagon-enum only when llvm target is present

See rust-lang#82379 (comment)

r? `````@petrochenkov`````

`````@bors````` rollup

expand: Preserve order of inert attributes during expansion

Fixes rust-lang#67839
Fixes rust-lang#81871
r? ````@Aaron1011````

Enable API documentation for `std::os::wasi`.

This adds API documentation support for `std::os::wasi` modeled after
how `std::os::unix` works, so that WASI can be documented [here] along
with the other platforms.

[here]: https://doc.rust-lang.org/stable/std/os/index.html

Two changes of particular interest:

 - This changes the `AsRawFd` for `io::Stdin` for WASI to return
   `libc::STDIN_FILENO` instead of `sys::stdio::Stdin.as_raw_fd()` (and
   similar for `Stdout` and `Stderr`), which matches how the `unix`
   version works. `STDIN_FILENO` etc. may not always be explicitly
   reserved at the WASI level, but as long as we have Rust's `std` and
   `libc`, I think it's reasonable to guarantee that we'll always use
   `libc::STDIN_FILENO` for stdin.

 - This duplicates the `osstr2str` utility function, rather than
   trying to share it across all the configurations that need it.

r? ``@alexcrichton``

…lexcrichton

Add a `size()` function to WASI's `MetadataExt`.

WASI's `filestat` type includes a size field, so expose it in
`MetadataExt` via a `size()` function, similar to the corresponding Unix
function.

r? `````@alexcrichton`````

…matthewjasper

Skip emitting closure diagnostic when closure_kind_origins has no entry

Fixes rust-lang#82438

This map is not guarnateed to have an entry for a closure.