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Allow to click on setting text
You can test it [here](https://rustdoc.crud.net/imperio/gui-settings-text-click/doc/foo/index.html).
This PR allows to click on the text alongside the toggle to change it.
r? `@jsha`
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Rollup of 5 pull requests
Successful merges:
- #97302 (Do writeback of Closure params before visiting the parent expression)
- #97328 (rustc: Fix ICE in native library error reporting)
- #97351 (Output correct type responsible for structural match violation)
- #97398 (Add regression test for #82830)
- #97400 (Fix a typo on Struct `Substructure`)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Add regression test for #82830
Closes #82830
r? `@compiler-errors`
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b-naber:adt-const-params-structural-match-violation, r=michaelwoerister
Output correct type responsible for structural match violation
Previously we included the outermost type that caused a structural match violation in the error message and stated that that type must be annotated with `#[derive(Eq, PartialEq)]` even if it already had that annotation. This PR outputs the correct type in the error message.
Fixes https://github.com/rust-lang/rust/issues/97278
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rustc: Fix ICE in native library error reporting
Fixes https://github.com/rust-lang/rust/issues/97299
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Do writeback of Closure params before visiting the parent expression
This means that given the expression:
```
let x = |a: Vec<_>| {};
```
We will visit the HIR node for `a` before `x`, and report the ambiguity on the former instead of the latter. This also moves writeback for struct field ids and const blocks before, but the ordering of this and walking the expr doesn't seem to matter.
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Extend ptr::null and null_mut to all thin (including extern) types
Fixes https://github.com/rust-lang/rust/issues/93959
This change was accepted in https://rust-lang.github.io/rfcs/2580-ptr-meta.html
Note that this changes the signature of **stable** functions. The change should be backward-compatible, but it is **insta-stable** since it cannot (easily, at all?) be made available only through a `#![feature(…)]` opt-in.
The RFC also proposed the same change for `NonNull::dangling`, which makes sense it terms of its signature but not in terms of its implementation. `dangling` uses `align_of()` as an address. But what `align_of()` should be for extern types or whether it should be allowed at all remains an open question.
This commit depends on https://github.com/rust-lang/rust/pull/93977, which is not yet part of the bootstrap compiler. So `#[cfg]` is used to only apply the change in stage 1+. As far a I know bounds cannot be made conditional with `#[cfg]`, so the entire functions are duplicated. This is unfortunate but temporary.
Since this duplication makes it less obvious in the diff, the new definitions differ in:
* More permissive bounds (`Thin` instead of implied `Sized`)
* Different implementation
* Having `rustc_allow_const_fn_unstable(const_fn_trait_bound)`
* Having `rustc_allow_const_fn_unstable(ptr_metadata)`
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Minor improvement on else-no-if diagnostic
Don't suggest wrapping in block since it's highly likely to be a missing `if` after `else`. Also rework message a bit (open to further suggestions).
cc: https://github.com/rust-lang/rust/pull/97298#discussion_r880933431
r? `@estebank`
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RFC3239: Implement `cfg(target)` - Part 2
This pull-request implements the compact `cfg(target(..))` part of [RFC 3239](https://github.com/rust-lang/rust/issues/96901).
I recommend reviewing this PR on a per commit basics, because of some moving parts.
cc `@GuillaumeGomez`
r? `@petrochenkov`
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Modify MIR building to drop repeat expressions with length zero
Closes #74836 .
Previously, when a user wrote `[foo; 0]` we used to simply leak `foo`. The goal is to fix that. This PR changes MIR building to make `[foo; 0]` equivalent to `{ drop(foo); [] }` in all cases. Of course, this is a breaking change (see below). A crater run did not indicate any regressions though, and given that the previous behavior was almost definitely not what any user wanted, it seems unlikely that anyone was relying on this.
Note that const generics are in general unaffected by this. Inserting the extra `drop` is only meaningful/necessary when `foo` is of a non-`Copy` type, and array repeat expressions with const generic repetition count must always be `Copy`.
Besides the obvious change to behavior associated with the additional drop, there are three categories of examples where this also changes observable behavior. In all of these cases, the new behavior is consistent with what you would get by replacing `[foo; 0]` with `{ drop(foo); [] }`. As such, none of these give the user new powers to express more things.
**No longer allowed in const (breaking)**:
```rust
const _: [String; 0] = [String::new(); 0];
```
This compiles on stable today. Because we now introduce the drop of `String`, this no longer compiles as `String` may not be dropped in a const context.
**Reduced dataflow (non-breaking)**:
```rust
let mut x: i32 = 0;
let r = &x;
let a = [r; 0];
x = 5;
let _b = a;
```
Borrowck rejects this code on stable because it believes there is dataflow between `a` and `r`, and so the lifetime of `r` has to extend to the last statement. This change removes the dataflow and the above code is allowed to compile.
**More const promotion (non-breaking)**:
```rust
let _v: &'static [String; 0] = &[String::new(); 0];
```
This does not compile today because `String` having drop glue keeps it from being const promoted (despite that drop glue never being executed). After this change, this is allowed to compile.
### Alternatives
A previous attempt at this tried to reduce breakage by various tricks. This is still a possibility, but given that crater showed no regressions it seems unclear why we would want to introduce this complexity.
Disallowing `[foo; 0]` completely is also an option, but obviously this is more of a breaking change. I do not know how often this is actually used though.
r? `@oli-obk`
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Introduce stricter checks for might_permit_raw_init under a debug flag
This is intended to be a version of the strict checks tried out in #79296, but also checking number validity (under the assumption that `let _ = std::mem::uninitialized::<u32>()` is UB, which seems to be what https://github.com/rust-lang/unsafe-code-guidelines/issues/71 is leaning towards.)
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Add tests for lint on type dependent on consts
r? `@lcnr`
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Make weird name lints trigger behind cfg_attr
The weird name lints (`unknown_lints`, `renamed_and_removed_lints`), the lints that lint the linting, were previously not firing for lint level declarations behind `cfg_attr`, as they were only running before expansion.
Now, this will give a `unknown_lints` warning:
```Rust
#[cfg_attr(all(), allow(this_lint_does_not_exist))]
fn foo() {}
```
Lint level declarations behind a `cfg_attr` whose condition is not applying are still ignored. So this still won't give a warning:
```Rust
#[cfg_attr(any(), allow(this_lint_does_not_exist))]
fn foo() {}
```
Furthermore, this PR also makes the weird name lints respect level delcarations for *them* that were hidden by `cfg_attr`, making them consistent to other lints. So this will now not issue a warning:
```Rust
#[cfg_attr(all(), allow(unknown_lints))]
mod foo {
#[allow(does_not_exist)]
fn foo() {
}
}
```
Fixes #97094
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Previously, we were emitting weird name lints (for renamed or unknown lints)
before expansion, most importantly before cfg expansion.
This meant that the weird name lints would not fire
for lint attributes hidden inside cfg_attr. The same applied
for lint level specifications of those lints.
By moving the lints for the lint names to the post-expansion
phase, these issues are resolved.
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Parse expression after `else` as a condition if followed by `{`
Fixes #49361.
Two things:
1. This wording needs help. I can never find a natural/intuitive phrasing when I write diagnostics :sweat_smile:
2. Do we even want to show the "wrap in braces" case? I would assume most of the time the "add an `if`" case is the right one.
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Refactor call terminator to always include destination place
In #71117 people seemed to agree that call terminators should always have a destination place, even if the call was guaranteed to diverge. This implements that. Unsurprisingly, the diff touches a lot of code, but thankfully I had to do almost nothing interesting. The only interesting thing came up in const prop, where the stack frame having no return place was also used to indicate that the layout could not be computed (or similar). I replaced this with a ZST allocation, which should continue to do the right things.
cc `@RalfJung` `@eddyb` who were involved in the original conversation
r? rust-lang/mir-opt
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Rollup of 5 pull requests
Successful merges:
- #97240 (Typo suggestion for a variable with a name similar to struct fields)
- #97289 (Lifetime variance fixes for clippy)
- #97290 (Turn on `fast_submodules` unconditionally)
- #97336 (typo)
- #97337 (Fix stabilization version of `Ipv6Addr::to_ipv4_mapped`)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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r=compiler-errors
Typo suggestion for a variable with a name similar to struct fields
closes #97133
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Disallow compare-mode=nll test differences
This ensures that new tests don't get added not as revisions if they have nll output. This will make stabilization PR easier.
r? `@Mark-Simulacrum`
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rustdoc: Remove fields_stripped fields (and equivalents)
Fixes #90588.
r? `@camelid`
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Add some regression tests for #90400
This adds two regression tests taken from https://github.com/rust-lang/rust/issues/90400#issuecomment-954927836.
Note that we cannot close the issue right now as the [original code](https://github.com/rust-lang/rust/issues/90400#issue-1039577786) still triggers an ICE.
r? `@compiler-errors`
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Fix some typos in arg checking algorithm
Fixes #97197
Also fixes a typo where if we're missing args A, B, C, we actually say A, B, B
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Add regression test for #91949
Closes #91949
This needs `build-fail` because the original bug only appeared with `cargo build`.
r? `@compiler-errors`
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Remove feature: `crate` visibility modifier
FCP completed in #53120.
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Make write/print macros eagerly drop temporaries
This PR fixes the 2 regressions in #96434 (`println` and `eprintln`) and changes all the other similar macros (`write`, `writeln`, `print`, `eprint`) to match the old pre-#94868 behavior of `println` and `eprintln`.
argument position | before #94868 | after #94868 | after this PR
--- |:---:|:---:|:---:
`write!($tmp, "…", …)` | :rage: | :rage: | :smiley_cat:
`write!(…, "…", $tmp)` | :rage: | :rage: | :smiley_cat:
`writeln!($tmp, "…", …)` | :rage: | :rage: | :smiley_cat:
`writeln!(…, "…", $tmp)` | :rage: | :rage: | :smiley_cat:
`print!("…", $tmp)` | :rage: | :rage: | :smiley_cat:
`println!("…", $tmp)` | :smiley_cat: | :rage: | :smiley_cat:
`eprint!("…", $tmp)` | :rage: | :rage: | :smiley_cat:
`eprintln!("…", $tmp)` | :smiley_cat: | :rage: | :smiley_cat:
`panic!("…", $tmp)` | :smiley_cat: | :smiley_cat: | :smiley_cat:
Example of code that is affected by this change:
```rust
use std::sync::Mutex;
fn main() {
let mutex = Mutex::new(0);
print!("{}", mutex.lock().unwrap()) /* no semicolon */
}
```
You can see several real-world examples like this in the Crater links at the top of #96434. This code failed to compile prior to this PR as follows, but works after this PR.
```console
error[E0597]: `mutex` does not live long enough
--> src/main.rs:5:18
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5 | print!("{}", mutex.lock().unwrap()) /* no semicolon */
| ^^^^^^^^^^^^---------
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| borrowed value does not live long enough
| a temporary with access to the borrow is created here ...
6 | }
| -
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| `mutex` dropped here while still borrowed
| ... and the borrow might be used here, when that temporary is dropped and runs the `Drop` code for type `MutexGuard`
```
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