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Rollup of 3 pull requests
Successful merges:
- #113039 (make custom mir ICE a bit nicer)
- #113058 (Add/improve code comments)
- #113063 (Update books)
r? `@ghost`
`@rustbot` modify labels: rollup
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Add/improve code comments
Working on something else and did some small comments updates/adds.
r? `@notriddle`
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rustdoc: render generic params & where-clauses of cross-crate assoc tys in impls
We used to only ever render generic parameters & where-clauses of cross-crate associated types when the item was located inside of a trait and we used to just drop them when it was inside of an impl block (trait or inherent).
Fixes #112904.
`@rustbot` label A-cross-crate-reexports
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blocks
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Migrate `item_bounds` to `ty::Clause`
Should be simpler than the next PR that's coming up. Last three commits are the relevant ones.
r? ``@oli-obk`` or ``@lcnr``
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Add `lazy_type_alias` feature gate
Add the `type_alias_type` to be able to have the weak alias used without restrictions.
Part of #112792.
cc `@compiler-errors`
r? `@oli-obk`
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r=notriddle
[rustdoc] partially fix invalid files creation
Part of #111249. It only removes generation for modules which shouldn't exist. For files, we need the compiler to keep re-export information alive for external items so we can actually have the right path to their location as it's currently not generating them correctly.
In case the item is inlined, it shouldn't (and neither should its children) get a file generated.
r? ```@notriddle```
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Add a fully fledged `Clause` type, rename old `Clause` to `ClauseKind`
Does two basic things before I put up a more delicate set of PRs (along the lines of #112714, but hopefully much cleaner) that migrate existing usages of `ty::Predicate` to `ty::Clause` (`predicates_of`/`item_bounds`/`ParamEnv::caller_bounds`).
1. Rename `Clause` to `ClauseKind`, so it's parallel with `PredicateKind`.
2. Add a new `Clause` type which is parallel to `Predicate`.
* This type exposes `Clause::kind(self) -> Binder<'tcx, ClauseKind<'tcx>>` which is parallel to `Predicate::kind` 😸
The new `Clause` type essentially acts as a newtype wrapper around `Predicate` that asserts that it is specifically a `PredicateKind::Clause`. Turns out from experimentation[^1] that this is not negative performance-wise, which is wonderful, since this a much simpler design than something that requires encoding the discriminant into the alignment bits of a predicate kind, or something else like that...
r? ``@lcnr`` or ``@oli-obk``
[^1]: https://github.com/rust-lang/rust/pull/112714#issuecomment-1595653910
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Only use it when the type alias contains an opaque type.
Also does wf-checking on such type aliases.
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r=notriddle
Fix bug where private item with intermediate doc hidden re-export was not inlined
This fixes this bug:
```rust
mod private {
/// Original.
pub struct Bar3;
}
/// Hidden.
#[doc(hidden)]
pub use crate::private::Bar3;
/// Visible.
pub use self::Bar3 as Reexport;
```
In this case, `private::Bar3` should be inlined and renamed `Reexport` but instead we have:
```
pub use self::Bar3 as Reexport;
```
and no links.
There were actually two issues: the first one is that we forgot to check if the next intermediate re-export was doc hidden. The second was that we made the `#[doc(hidden)]` attribute inheritable, which shouldn't be possible.
r? `@notriddle`
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inlined
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The default fn ret ty is always unit. Just use that.
Looking back at the time when `FnRetTy` (then called
`FunctionRetTy`) was first added to rustdoc, it seems to originally
be there because `-> !` was a special form: the never type didn't
exist back then.
https://github.com/rust-lang/rust/commit/eb01b17b06eb35542bb80ff7456043b0ed5572ba#diff-384affc1b4190940f114f3fcebbf969e7e18657a71ef9001da6b223a036687d9L921-L924
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Clean up usage of `cx.tcx` when `tcx` is already set into a variable
I discovered a few cases where `cx.tcx` (and equivalents) was used whereas `tcx` was already stored into a variable. In those cases, better to just use `tcx` directly.
r? `@notriddle`
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r=notriddle
Fix re-export of doc hidden macro not showing up
It's part of the follow-up of https://github.com/rust-lang/rust/pull/109697.
Re-exports of doc hidden macros should be visible. It was the only kind of re-export of doc hidden item that didn't show up.
r? `@notriddle`
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r=notriddle
Correctly handle associated items of a trait inside a `#[doc(hidden)]` item
Fixes https://github.com/rust-lang/rust/issues/111064.
cc `@compiler-errors`
r? `@notriddle`
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Replace `tcx.mk_trait_ref` with `TraitRef::new`
First step in implementing https://github.com/rust-lang/compiler-team/issues/616
r? `@lcnr`
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rustdoc: catch and don't blow up on impl Trait cycles
Fixes #110629
An odd feature of Rust is that `Foo` is invalid, but `Bar` is okay:
type Foo<'a, 'b> = Box<dyn PartialEq<Foo<'a, 'b>>>;
type Bar<'a, 'b> = impl PartialEq<Bar<'a, 'b>>;
To get it right, track every time rustdoc descends into a type alias, so if it shows up twice, it can be write the path instead of infinitely expanding it.
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An odd feature of Rust is that `Foo` is invalid, but `Bar` is okay:
type Foo<'a, 'b> = Box<dyn PartialEq<Foo<'a, 'b>>>;
type Bar<'a, 'b> = impl PartialEq<Bar<'a, 'b>>;
To get it right, track every time rustdoc descends into a type alias,
so if it shows up twice, it can be write the path instead of
infinitely expanding it.
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rustdoc: rebind bound vars to type-outlives predicates
Fixes #110900.
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