no_effect_underscore_binding: _ prefixed variables can be used
Prefixing a variable with a `_` does not mean that it will not be used. If such a variable is used later, do not warn about the fact that its initialization does not have a side effect as this is fine.
changelog: [`no_effect_underscore_binding`]: warn only if variable is unused
Fix#12166
Add . to end of lint lists in configuration + Fix typo in pub_underscore_fields_behavior
Fixes https://github.com/rust-lang/rust-clippy/pull/10283#issuecomment-1890600381
In the "/// Lint: " list on each configuration option, you have to end with a dot. If the lint list doesn't have a dot, the configuration won't have documentation.
This PR adds those missing dots in some of the configuration, thus also adding their documentation.
changelog: Fix bug where a lot of config documentation wasn't showing.
changelog: Fix typo in `pub_underscore_fields_behavior` (`PublicallyExported` -> `PubliclyExported`)
Tweak the threshold for chunked swapping
Thanks to `@AngelicosPhosphoros` for the tests here, which I copied from #98892.
This is an experiment as a simple alternative to that PR that just tweaks the existing threshold, since that PR showed that 3×Align (like `String`) currently doesn't work as well as it could.
Rollup of 6 pull requests
Successful merges:
- #119997 (Fix impl stripped in rustdoc HTML whereas it should not be in case the impl is implemented on a type alias)
- #120000 (Ensure `callee_id`s are body owners)
- #120063 (Remove special handling of `box` expressions from parser)
- #120116 (Remove alignment-changing in-place collect)
- #120138 (Increase vscode settings.json `git.detectSubmodulesLimit`)
- #120169 (Spelling fix)
r? `@ghost`
`@rustbot` modify labels: rollup
Remove alignment-changing in-place collect
This removes the alignment-changing in-place collect optimization introduced in #110353
Currently stable users can't benefit from the optimization because GlobaAlloc doesn't support alignment-changing realloc and neither do most posix allocators. So in practice it has a negative impact on performance.
Explanation from https://github.com/rust-lang/rust/issues/120091#issuecomment-1899071681:
> > You mention that in case of alignment mismatch -- when the new alignment is less than the old -- the implementation calls `mremap`.
>
> I was trying to note that this isn't really the case in practice, due to the semantics of Rust's allocator APIs. The only use of the allocator within the `in_place_collect` implementation itself is [a call to `Allocator::shrink()`](db7125f008/library/alloc/src/vec/in_place_collect.rs (L299-L303)), which per its documentation [allows decreasing the required alignment](https://doc.rust-lang.org/1.75.0/core/alloc/trait.Allocator.html). However, in stable Rust, the only available `Allocator` is [`Global`](https://doc.rust-lang.org/1.75.0/alloc/alloc/struct.Global.html), which delegates to the registered `GlobalAlloc`. Since `GlobalAlloc::realloc()` [cannot change the required alignment](https://doc.rust-lang.org/1.75.0/core/alloc/trait.GlobalAlloc.html#method.realloc), the implementation of [`<Global as Allocator>::shrink()`](db7125f008/library/alloc/src/alloc.rs (L280-L321)) must fall back to creating a brand-new allocation, `memcpy`ing the data into it, and freeing the old allocation, whenever the alignment doesn't remain exactly the same.
>
> Therefore, the underlying allocator, provided by libc or some other source, has no opportunity to internally `mremap()` the data when the alignment is changed, since it has no way of knowing that the allocation is the same.
Remove special handling of `box` expressions from parser
#108471 added a temporary hack to parse `box expr`. It's been almost a year since then, so I think it's safe to remove the special handling.
As a drive-by cleanup, move `parser/removed-syntax*` tests to their own directory.
Fix impl stripped in rustdoc HTML whereas it should not be in case the impl is implemented on a type alias
Fixes#119015.
I talked about it a bit with ```@petrochenkov.``` They might change what `EffectiveVisibilities` return for impl items like this one and make them not only reachable but also re-exported, which would fix this case. It could also potentially break other things, so it'll be done whenever they can and then we can check together.
Surprisingly, this fix is making rustdoc even closer to rustc in term of errors (the CI currently fails because currently accepted broken codes aren't working anymore with this change). Not sure exactly why though. This is linked to https://github.com/rust-lang/rust/pull/110631 from what I could find.
So either I'm missing something here, or we consider it's ok and we consider the failing tests as "should fail" and I'll update `rustdoc-ui` ones.
r? ```@notriddle```
Added back previously available exports:
* Forward/Backward: used when implementing `AnalysisDomain`
* Engine: used in user's code to solve the dataflow problem
* SwitchIntEdgeEffects: used when implementing functions of the `Analysis` trait
* graphviz: potentially useful for debugging purposes
These exports are used when implementing external tools based on MIR
dataflow framework.
Closes#120130
internal: add `max_line_length` to `.editorconfig`
This helps with setting proper visual guides/rulers for the right margin in some editors/IDEs (e.g. CLion)
Avoid code generation for ThinVec<Diagnostic>'s destructor in the query system
This avoids 2 instances of the destructor of `ThinVec<Diagnostic>` from being included in `execute_job`. It also outlines the cold branch in `store_side_effects` / `store_side_effects_for_anon_node`.
Find function path references early in the same lint pass
This removes a visitor that existed to collect paths to functions in a context where the exact signature is required in order to cancel the lint.
E.g. when there's a `let _: fn(&mut i32) = path_to_fn_ref_mut_i32;` statement somewhere in the crate, we shouldn't suggest removing the mutable reference in the function signature.
It was doing a whole pass through the crate at the end, which seems unnecessary.
It seems like we should be able to add entries to the map in the same lint pass.
The map is untouched all the way until `check_crate_post` (at which point it will be populated by the visitor and finally checked), so it doesn't seem like this changes behavior: it will only be fully populated by the time we reach `check_crate_post` no matter what.
I don't think this will have a significant perf impact but it did show up in a profile with 0.5% for a crate I was looking into and looked like a low hanging fruit.
changelog: none
Introduce split_at_checked and split_at_mut_checked methods to slices
types (including str) which are non-panicking versions of split_at and
split_at_mut respectively. This is analogous to get method being
non-panicking version of indexing.
bjorn3 says:
> On errors we don't finalize the incr comp cache, but non-fatal diagnostics are cached afaik.
Otherwise we would have to replay the query in question, which we may not be able to do if the query
key is not reconstructible from the dep node fingerprint.
So we must track these flags to avoid replaying incorrect diagnostics.
perf: Don't track specific live points for promoteds
We don't query this information out of the promoted (it's basically a single "unit" regardless of the complexity within it) and this saves on re-initializing the SparseIntervalMatrix's backing IndexVec with mostly empty rows for all of the leading regions in the function. Typical promoteds will only contain a few regions that need up be uplifted, while the parent function can have thousands.
For a simple function repeating println!("Hello world"); 50,000 times this reduces compile times from 90 to 15 seconds in debug mode. The previous implementations re-initialization led to an overall roughly n^2 runtime as each promoted initialized slots for ~n regions, now we scale closer to linearly (5000 hello worlds takes 1.1 seconds).
cc https://github.com/rust-lang/rust/issues/50994, https://github.com/rust-lang/rust/issues/86244
Don't use `ReErased` to detect type test promotion failed
Using `ReErased` here is convenient because it implicitly stores the state that we are explicitly recording with the `failed` variable now, but I also think it adds a tiny bit of complexity that is not worth it.
r? `@aliemjay`
`single_use_lifetimes`: Don't suggest deleting lifetimes with bounds
Closes#117965
```
9 | pub fn get<'b: 'a>(&'b self) -> &'a str {
| ^^ -- ...is used only here
| |
| this lifetime...
```
In this example, I think the `&'b self` can be replaced with the bound itself, yielding `&'a self`, but this would require a deeper refactor. Happy to do as a follow-on PR if desired.
Teach tidy about line/col information for malformed features
This makes it significantly easier to find the specific feature, since you can now just click it in the command line of your IDE
Avoid ICEs in trait names without `dyn`
Check diagnostic is error before downgrading. Fix#119633.
Account for traits using self-trait by name without `dyn`. Fix#119652.
Expose Obligations created during type inference.
This PR is a first pass at exposing the trait obligations generated and solved for during the type-check progress. Exposing these obligations allows for rustc plugins to use the public interface for proof trees (provided by the next gen trait solver).
The changes proposed track *all* obligations during the type-check process, this is desirable to not only look at the trees of failed obligations, but also those of successfully proved obligations. This feature is placed behind an unstable compiler option `track-trait-obligations` which should be used together with the `next-solver` option. I should note that the main interface is the function `inspect_typeck` made public in `rustc_hir_typeck/src/lib.rs` which allows the caller to provide a callback granting access to the `FnCtxt`.
r? `@lcnr`
Stabilize single-field offset_of
This PR stabilizes offset_of for a single field. There has been some further discussion at https://github.com/rust-lang/rust/issues/106655 about whether this is advisable; I'm opening the PR anyway so that the code is available.
fix panic with reference in macro
it panic at `builder.make_mut(segment)`, where segment is from macro expand. And the usage reference in orginal macro call isn't a `PathSegment` so we can't update it in `apply_references`, I can't find a way to deal with it properly so here just filter out the reference in macro. LMK if there are better way to fix this
try to close https://github.com/rust-lang/rust-analyzer/issues/16328
