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rustdoc: fix up old test
`tests/rustdoc/line-breaks.rs` had several issues:
1. It used `//`@count`` instead of `// `@count`` (notice the space!) which gets treated as a `ui_test` directive instead of a `htmldocck` one. `compiletest` didn't flag it as an error because it's allowlisted ([#121561](https://github.com/rust-lang/rust/pull/121561)) presumably precisely because of this test. And before the compiletest→ui_test migration, these directives must've been ignored, too, because …
2. … the checks themselves no longer work either: The count of `<br>`s is actually 0 in all 3 cases because – well – we no longer generate any `<br>`s inside `<pre>`s.
Since I don't know how to ``@count`` `\n`s instead of `<br>`s, I've turned them into ``@matches`.` Btw, I don't know if this test is still desirable or if we have other tests that cover this (I haven't checked).
r? rustdoc
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Expose the Freeze trait again (unstably) and forbid implementing it manually
non-emoji version of https://github.com/rust-lang/rust/pull/121501
cc #60715
This trait is useful for generic constants (associated consts of generic traits). See the test (`tests/ui/associated-consts/freeze.rs`) added in this PR for a usage example. The builtin `Freeze` trait is the only way to do it, users cannot work around this issue.
It's also a useful trait for building some very specific abstrations, as shown by the usage by the `zerocopy` crate: https://github.com/google/zerocopy/issues/941
cc ```@RalfJung```
T-lang signed off on reexposing this unstably: https://github.com/rust-lang/rust/pull/121501#issuecomment-1969827742
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r=notriddle
[rustdoc] Prevent inclusion of whitespace character after macro_rules ident
Discovered this bug randomly when looking at:
We were too eagerly trying to merge tokens that shouldn't be merged together (for example if you have a code comment followed by a code comment, we merge them in one attribute to reduce the DOM size).
r? ``@notriddle``
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highlighting
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Fix link generation for foreign macro in jump to definition feature
The crate name is already added to the link so it shouldn't be added a second time for local foreign macros.
r? ``@notriddle``
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Add test case for primitive links in alias js
Follow up #121490
CC #121106
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defintion feature
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Use generic `NonZero` in tests.
Tracking issue: https://github.com/rust-lang/rust/issues/120257
r? `@dtolnay`
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Closes #106421
This was already fixed by
f5d43a052b9eb464e54af819143467954d814a24, but now the test cases are
added.
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Fix missing trait impls for type in rustc docs
Fixes #76736
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r=GuillaumeGomez
rustdoc: fix and refactor HTML rendering a bit
* refactoring: get rid of a bunch of manual `f.alternate()` branches
* not sure why this wasn't done so already, is this perf-sensitive?
* fix an ICE in debug builds of rustdoc
* rustdoc used to crash on empty outlives-bounds: `where 'a:`
* properly escape const generic defaults
* actually print empty trait and outlives-bounds (doesn't work for cross-crate reexports yet, will fix that at some other point) since they can have semantic significance
* outlives-bounds: forces lifetime params to be early-bound instead of late-bound which is technically speaking part of the public API
* trait-bounds: can affect the well-formedness, consider
* makeshift “const-evaluatable” bounds under `generic_const_exprs`
* bounds to force wf-checking in light of #100041 (quite artificial I know, I couldn't figure out something better), see https://github.com/rust-lang/rust/pull/121160#discussion_r1491563816
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r=GuillaumeGomez
Add extra indent spaces for rust-playground link
Fixes #120998
Seems add `rustfmt` for this is somehow too heavy,
only adding indent spaces at the starting of each line of code seems good enough.
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r=GuillaumeGomez
rustdoc: cross-crate re-exports: correctly render late-bound params in source order even if early-bound params are present
r? ghost
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source order even if early-bound params are present
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r=GuillaumeGomez
rustdoc: Fix handling of doc_auto_cfg feature for cfg attributes on glob reexport
This is a follow-up of #120501 and a part of https://github.com/rust-lang/rust/issues/120487.
r? `@notriddle`
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r=notriddle
rustdoc: Correctly handle attribute merge if this is a glob reexport
Fixes #120487.
The regression was introduced in https://github.com/rust-lang/rust/pull/113091. Only non-glob reexports should have been impacted.
cc `````@Nemo157`````
r? `````@notriddle`````
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It looks like none of these are actually needed.
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[rustdoc] Allows links in headings
Reopening of https://github.com/rust-lang/rust/pull/94360.
# Explanations
Rustdoc currently doesn't follow the markdown spec on headings: we don't allow links in them. So instead of having headings linking to themselves, this PR generates an anchor on the left side like this:
<details>
<summary>previous version</summary>
</details>
Having the anchor always displayed allows for mobile devices users to be able to have a link to the anchor. The different color used for the anchor itself is the same as links so people notice when looking at it that they can click on it.
You can test it [here](https://rustdoc.crud.net/imperio/links-in-headings/std/index.html).
cc `@camelid`
r? `@notriddle`
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rustdoc: rename `issue-\d+.rs` tests to have meaningful names (part 5)
Follow up
* https://github.com/rust-lang/rust/pull/116214
* https://github.com/rust-lang/rust/pull/116432
* https://github.com/rust-lang/rust/pull/116824
* https://github.com/rust-lang/rust/pull/118105
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r=GuillaumeGomez
rustdoc: offset generic args of cross-crate trait object types when cleaning
Fixes #119529.
This PR contains several refactorings apart from the bug fix.
Best reviewed commit by commit.
r? GuillaumeGomez
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r=compiler-errors
Use diagnostic namespace in stdlib
This required a minor fix to have the diagnostics shown in third party crates when the `diagnostic_namespace` feature is not enabled. See https://github.com/rust-lang/rust/pull/119216/commits/5d63f5d8d1a72167c1d5242b2e1ed5b7259fd526 for details. I've opted for having a single PR for both changes as it's really not that much code. If it is required it should be easy to split up the change into several PR's.
r? `@compiler-errors`
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[rustdoc] Fix invalid handling for static method calls in jump to definition feature
I realized when working on a clippy lint that static method calls on `Self` could not give me the method `Res`. For that, we need to use `typeck` and so that's what I did in here.
It fixes the linking to static method calls.
r? ````@notriddle````
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r=GuillaumeGomez
rustdoc: clean up source sidebar hide button
This is a redesign of the feature, with parts pulled from https://github.com/rust-lang/rust/pull/119049 but with a button that looks more like a button and matches the one used on other sidebar pages.
Preview:
* http://notriddle.com/rustdoc-html-demo-8/source-sidebar-resize/src/std/lib.rs.html
* http://notriddle.com/rustdoc-html-demo-8/source-sidebar-resize/std/index.html
| | Before | After |
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| Closed |  | 
| Open |  | 
| Mobile Closed |  | 
| Mobile Open |  | 
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It doesn't look quite right, because the lines are too far apart,
and it's not going to be announced by screenreaders as a menu button,
since that's not what the symbol means.
This adds a real tooltip and uses a better drawing of the icon.
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Don't merge cfg and doc(cfg) attributes for re-exports
Fixes #112881.
## Explanations
When re-exporting things with different `cfg`s there are two things that can happen:
* The re-export uses a subset of `cfg`s, this subset is sufficient so that the item will appear exactly with the subset
* The re-export uses a non-subset of `cfg`s (e.g. like the example I posted just above where the re-export is ungated), if the non-subset `cfg`s are active (e.g. compiling that example on windows) then this will be a compile error as the item doesn't exist to re-export, if the subset `cfg`s are active it behaves like 1.
### Glob re-exports?
**This only applies to non-glob inlined re-exports.** For glob re-exports the item may or may not exist to be re-exported (potentially the `cfg`s on the path up until the glob can be removed, and only `cfg`s on the globbed item itself matter), for non-inlined re-exports see https://github.com/rust-lang/rust/issues/85043.
cc `@Nemo157`
r? `@notriddle`
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Remove mention of rust to make the error message generic.
The deprecation notice is used when in crates as well. This applies to versions Rust or Crates.
Relates #118148
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