There are lots of functions that modify a diagnostic. This can be via a
`&mut Diagnostic` or a `&mut DiagnosticBuilder`, because the latter type
wraps the former and impls `DerefMut`.
This commit converts all the `&mut Diagnostic` occurrences to `&mut
DiagnosticBuilder`. This is a step towards greatly simplifying
`Diagnostic`. Some of the relevant function are made generic, because
they deal with both errors and warnings. No function bodies are changed,
because all the modifier methods are available on both `Diagnostic` and
`DiagnosticBuilder`.
This mostly works well, and eliminates a couple of delayed bugs.
One annoying thing is that we should really also add an
`ErrorGuaranteed` to `proc_macro::bridge::LitKind::Err`. But that's
difficult because `proc_macro` doesn't have access to `ErrorGuaranteed`,
so we have to fake it.
Ignore imported items in `min_ident_chars`
Suppress the `min_ident_chars` warning for items whose name we cannot control. Do not warn for `use a::b`, but warn for `use a::b as c`, since `c` is a local identifier.
Fixes#12232
---
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: [`min_ident_chars`]: Do not warn on non-local identifiers
[`incompatible_msrv`]: allow expressions that come from desugaring
Fixes#12273
changelog: [`incompatible_msrv`]: don't lint on the `IntoFuture::into_future` call desugared by `.await`
Suppress the `min_ident_chars` warning for items whose name we cannot
control. Do not warn for `use a::b`, but warn for `use a::b as c`, since
`c` is a local identifier.
Fixes#12232
[`implied_bounds_in_impls`]: avoid linting on overlapping associated tys
Fixes#11880
Before this change, we were simply ignoring associated types (except for suggestion purposes), because of an incorrect assumption (see the comment that I also removed).
For something like
```rs
trait X { type T; }
trait Y: X { type T; }
// Can't constrain `X::T` through `Y`
fn f() -> impl X<T = i32> + Y<T = u32> { ... }
```
We now avoid linting if the implied bound (`X<T = i32>`) "names" associated types that also exists in the implying trait (`trait Y`). Here that would be the case.
But if we only wrote `impl X + Y<T = u32>` then that's ok because `X::T` was never constrained in the first place.
I haven't really thought about how this interacts with GATs, but I think it's fine. Fine as in, it might create false negatives, but hopefully no false positives.
(The diff is slightly annoying because of formatting things. Really the only thing that changed in the if chain is extracting the `implied_by_def_id` which is needed for getting associated types from the trait, and of course actually checking for overlap)
cc `@Jarcho` ? idk if you want to review this or not. I assume you looked into this code a bit to find this bug.
changelog: [`implied_bounds_in_impls`]: avoid linting when associated type from supertrait can't be constrained through the implying trait bound
[`mem_replace_with_default`] No longer triggers on unused expression
changelog:[`mem_replace_with_default`]: No longer triggers on unused expression
Change [`mem_replace_with_default`] to not trigger on unused expression because the lint from `#[must_use]` handle this case better.
fixes: #5586
Minor refactor format-args
* Move all linting logic into a single format implementations struct
This should help with the future format-args improvements.
**NOTE TO REVIEWERS**: use "hide whitespace" in the github diff -- most of the code has shifted, but relatively low number of lines actually modified.
Followig up from #12274
r? `@xFrednet`
---
changelog: none
Fix async closures in CTFE
First commit renames `is_coroutine_or_closure` into `is_closure_like`, because `is_coroutine_or_closure_or_coroutine_closure` seems confusing and long.
Second commit fixes some forgotten cases where we want to handle `TyKind::CoroutineClosure` the same as closures and coroutines.
The test exercises the change to `ValidityVisitor::aggregate_field_path_elem` which is the source of #120946, but not the change to `UsedParamsNeedSubstVisitor`, though I feel like it's not that big of a deal. Let me know if you'd like for me to look into constructing a test for the latter, though I have no idea what it'd look like (we can't assert against `TooGeneric` anywhere?).
Fixes#120946
r? oli-obk cc ``@RalfJung``
fix: ICE when array index exceeds usize
fixes#12253
This PR fixes ICE in `indexing_slicing` as it panics when the index of the array exceeds `usize`.
changelog: none
Don't allow derive macros to silence `disallowed_macros`
fixes#12254
The implementation is a bit of a hack, but "works". A derive expanding to another derive won't work properly, but we shouldn't be linting those anyways.
changelog: `disallowed_macros`: Don't allow derive macros to silence their own expansion
Assert that params with the same *index* have the same *name*
Found this bug when trying to build libcore with the new solver, since it will canonicalize two params with the same index into *different* placeholders if those params differ by name.
Minor refactor format-impls
Move all linting logic into a single format implementations struct
This should help with the future format-args improvements.
TODO: do the same with format_args.rs, perhaps in the same PR
**NOTE TO REVIEWERS**: use "hide whitespace" in the github diff -- most of the code has shifted, but relatively low number of lines actually modified.
changelog: none
Refactor `implied_bounds_in_impls` lint
Some refactors in `implied_bounds_in_impls` that I wanted to make while working on something else in that file, but I found them "large" enough that I didn't want them in the same PR and instead wanted them reviewed separately (since itd just be distracting).
This just splits up the two phases of "collect all the supertraits from each of the `impl Trait` bounds" and "find those `impl Trait` bounds that are mentioned in one of the previously-collected supertraits" into separate functions. Before, this was all in a single function.
Reviewing it commit by commit might make it easier. I can squash it down later.
changelog: none
stop linting [`blocks_in_conditions`] on `match` with weird attr macro case
should fixes: #12016
---
changelog: [`blocks_in_conditions`] - fix FP on `match` with weird attr macro
This might not be the best solution, as the root cause (i think?) is the `span` of block was incorrectly given by the compiler?
I'm open to better solutions
* Move all linting logic into a single format implementations struct
This should help with the future format-args improvements.
TODO: do the same with format_args.rs, perhaps in the same PR
A lot of cases of the "noise" cases of `similar_names` come from two
idents with a different first letter, which is easy enough to
differentiate visually but causes this lint to be raised.
Do not raise the lint in these cases, as long as the first character
does not have a lookalike.
Link: https://github.com/rust-lang/rust-clippy/issues/10926
Fix issue #12034: add autofixes for unnecessary_fallible_conversions
fixes#12034
Currently, the `unnecessary_fallible_conversions` lint was capable of autofixing expressions like `0i32.try_into().unwrap()`. However, it couldn't autofix expressions in the form of `i64::try_from(0i32).unwrap()` or `<i64 as TryFrom<i32>>::try_from(0).unwrap()`.
This pull request extends the functionality to correctly autofix these latter forms as well.
changelog: [`unnecessary_fallible_conversions`]: Add autofixes for more forms
Invert diagnostic lints.
That is, change `diagnostic_outside_of_impl` and `untranslatable_diagnostic` from `allow` to `deny`, because more than half of the compiler has been converted to use translated diagnostics.
This commit removes more `deny` attributes than it adds `allow` attributes, which proves that this change is warranted.
r? ````@davidtwco````
Rollup of 9 pull requests
Successful merges:
- #119592 (resolve: Unload speculatively resolved crates before freezing cstore)
- #120103 (Make it so that async-fn-in-trait is compatible with a concrete future in implementation)
- #120206 (hir: Make sure all `HirId`s have corresponding HIR `Node`s)
- #120214 (match lowering: consistently lower bindings deepest-first)
- #120688 (GVN: also turn moves into copies with projections)
- #120702 (docs: also check the inline stmt during redundant link check)
- #120727 (exhaustiveness: Prefer "`0..MAX` not covered" to "`_` not covered")
- #120734 (Add `SubdiagnosticMessageOp` as a trait alias.)
- #120739 (improve pretty printing for associated items in trait objects)
r? `@ghost`
`@rustbot` modify labels: rollup
[`unconditional_recursion`]: compare by `Ty`s instead of `DefId`s
Fixes#12154Fixes#12181 (this was later edited in, so the rest of the description refers to the first linked issue)
Before this change, the lint would work with `DefId`s and use those to compare types. This PR changes it to compare types directly. It fixes the linked issue, but also other false positives I found in a lintcheck run. For example, one of the issues is that some types don't have `DefId`s (primitives, references, etc., leading to possible FNs), and the helper function used to extract a `DefId` didn't handle type parameters.
Another issue was that the lint would use `.peel_refs()` in a few places where that could lead to false positives (one such FP was in the `http` crate). See the doc comment on one of the added functions and also the test case for what I mean.
The code in the linked issue was linted because the receiver type is `T` (a `ty::Param`), which was not handled in `get_ty_def_id` and returned `None`, so this wouldn't actually *get* to comparing `self_arg != ty_id` here, and skip the early-return:
70573af31e/clippy_lints/src/unconditional_recursion.rs (L171-L178)
This alone could be fixed by doing something like `&& get_ty_def_id(ty).map_or(true, |ty_id)| self_arg != ty_id)`, but we don't really need to work with `DefId`s in the first place, I don't think.
changelog: [`unconditional_recursion`]: avoid linting when the other comparison type is a type parameter
Fix false positive in `redundant_type_annotations` lint
This PR changes the `redundant_type_annotations` lint to allow slice type annotations (i.e., `&[u8]`) for byte string literals. It will still consider _array_ type annotations (i.e., `&[u8; 4]`) as redundant. The reasoning behind this is that the type of byte string literals is by default a reference to an array, but, by using a type annotation, you can force it to be a slice. For example:
```rust
let a: &[u8; 4] = b"test";
let b: &[u8] = b"test";
```
Now, the type annotation for `a` will still be linted (as it is still redundant), but the type annotation for `b` will not.
Fixes#12212.
changelog: [`redundant_type_annotations`]: Fix false positive with byte string literals
That is, change `diagnostic_outside_of_impl` and
`untranslatable_diagnostic` from `allow` to `deny`, because more than
half of the compiler has be converted to use translated diagnostics.
This commit removes more `deny` attributes than it adds `allow`
attributes, which proves that this change is warranted.
[`redundant_locals`]: take by-value closure captures into account
Fixes#12225
The same problem in the linked issue can happen to regular closures too, and conveniently async blocks are closures in the HIR so fixing closures will fix async blocks as well.
changelog: [`redundant_locals`]: avoid linting when redefined variable is captured by-value
Add new lint: `ref_as_ptr`
Fixes#10130
Added new lint `ref_as_ptr` that checks for conversions from references to pointers and suggests using `std::ptr::from_{ref, mut}` instead.
The name is different than suggested in the issue (`as_ptr_cast`) since there were some other lints with similar names (`ptr_as_ptr`, `borrow_as_ptr`) and I wanted to follow the convention.
Note that this lint conflicts with the `borrow_as_ptr` lint in the sense that it recommends changing `&foo as *const _` to `std::ptr::from_ref(&foo)` instead of `std::ptr::addr_of!(foo)`. Personally, I think the former is more readable and, in contrast to `addr_of` macro, can be also applied to temporaries (cf. #9884).
---
changelog: New lint: [`ref_as_ptr`]
[#12087](https://github.com/rust-lang/rust-clippy/pull/12087)
add configuration for [`wildcard_imports`] to ignore certain imports
fixes: #11428
changelog: add configuration `ignored-wildcard-imports` for lint [`wildcard_imports`]
Fixed FP in `unused_io_amount` for Ok(lit), unrachable! and unwrap de…
…sugar
Fixes fp caused by linting on Ok(_) for all cases outside binding.
We introduce the following rules for match exprs.
- `panic!` and `unreachable!` are treated as consumed.
- `Ok( )` patterns outside `DotDot` and `Wild` are treated as consuming.
changelog: FP [`unused_io_amount`] when matching Ok(literal) or unreachable
fixes#12208
r? `@blyxyas`
We introduce the following rules for match exprs.
- `panic!` and `unreachable!` are treated as consumption.
- guard expressions in any arm imply consumption.
For match exprs:
- Lint only if exacrtly 2 non-consuming arms exist
- Lint only if one arm is an `Ok(_)` and the other is `Err(_)`
Added additional requirement that for a block return expression
that is a match, the source must be `Normal`.
changelog: FP [`unused_io_amount`] when matching Ok(literal)
Remove various `has_errors` or `err_count` uses
follow up to https://github.com/rust-lang/rust/pull/119895
r? `@nnethercote` since you recently did something similar.
There are so many more of these, but I wanted to get a PR out instead of growing the commit list indefinitely. The commits all work on their own and can be reviewed commit by commit.
The query accept arbitrary DefIds, not just owner DefIds.
The return can be an `Option` because if there are no nodes, then it doesn't matter whether it's due to NonOwner or Phantom.
Also rename the query to `opt_hir_owner_nodes`.
Add regression ui test for #2371Fixes#2371.
#2371 seems to already be handled correctly in the lint. This PR adds a ui regression test so we can close it.
r? `@blyxyas`
changelog: Add regression ui test for #2371
[fix] [`redundant_closure_for_method_calls`] Suggest relative paths for local modules
Fixes#10854.
Currently, `redundant_closure_for_method_calls` suggest incorrect paths when a method defined on a struct within inline mod is referenced (see the description in the aforementioned issue for an example; also see [this playground link](https://play.rust-lang.org/?version=stable&mode=release&edition=2021&gist=f7d3c5b2663c9bd3ab7abdb0bd38ee43) for the current-version output for the test cases added in this PR). It will now try to construct a relative path path to the module and suggest it instead.
changelog: [`redundant_closure_for_method_calls`] Fix incorrect path suggestions for types within local modules
FP: `needless_return_with_question_mark` with implicit Error Conversion
Return with a question mark was triggered in situations where the `?` desuraging was performing error conversion via `Into`/`From`.
The desugared `?` produces a match over an expression with type `std::ops::ControlFlow<B,C>` with `B:Result<Infallible, E:Error>` and `C:Result<_, E':Error>`, and the arms perform the conversion. The patch adds another check in the lint that checks that `E == E'`. If `E == E'`, then the `?` is indeed unnecessary.
changelog: False Positive: [`needless_return_with_question_mark`] when implicit Error Conversion occurs.
fixes: #11982
fix: incorrect suggestions generated by `manual_retain` lint
fixes#10393, fixes#11457, fixes#12081#10393: In the current implementation of `manual_retain`, if the argument to the closure is matched using tuple, they are all treated as the result of a call to `map.into_iter().filter(<f>)`. However, such tuple pattern matching can also occur in many different containers that stores tuples internally. The correct approach is to apply different lint policies depending on whether the receiver of `into_iter` is a map or not.
#11457 and #12081: In the current implementation of `manual_retain`, if the argument to the closure is `Binding`, the closure will be used directly in the `retain` method, which will result in incorrect suggestion because the first argument to the `retain` closure may be of a different type. In addition, if the argument to the closure is `Ref + Binding`, the lint will simply remove the `Ref` part and use the `Binding` part as the argument to the new closure, which will lead to bad suggestion for the same reason. The correct approach is to detect each of these cases and apply lint suggestions conservatively.
changelog: [`manual_retain`] refactor and add check for various patterns
Fix/Issue11932: assert* in multi-condition after unrolling will cause lint `nonminimal_bool` emit warning
fixes [Issue#11932](https://github.com/rust-lang/rust-clippy/issues/11932)
After `assert`, `assert_eq`, `assert_ne`, etc, assert family marcos unrolling in multi-condition expressions, lint `nonminimal_bool` will recognize whole expression as a entirety, analyze each simple condition expr of them, and check whether can simplify them.
But `assert` itself is a entirety to programmers, we don't need to lint on `assert`. This commit add check whether lint snippet contains `assert` when try to warning to an expression.
changelog: [`nonminimal_bool`] add check for condition expression
[`never_loop`]: recognize desugared `try` blocks
Fixes#12205
The old code assumed that only blocks with an explicit label can be jumped to (using `break`). This is mostly correct except for `try` desugaring, where the `?` operator is rewritten to a `break` to that block, even without a label on the block. `Block::targeted_by_break` is a little more accurate than just checking if a block has a label in that regard, so we should just use that instead
changelog: [`never_loop`]: avoid linting when `?` is used inside of a try block
Fixed FP in `redundant_closure_call` when closures are passed to macros
There are cases where the closure call is needed in some macros, this in particular occurs when the closure has parameters. To handle this case, we allow the lint when there are no parameters in the closure, or the closure is outside a macro invocation.
fixes: #11274#1553
changelog: FP: [`redundant_closure_call`] when closures with parameters are passed in macros.
Warn if an item coming from more recent version than MSRV is used
Part of https://github.com/rust-lang/rust-clippy/issues/6324.
~~Currently, the lint is not working for the simple reason that the `stable` attribute is not kept in dependencies. I'll send a PR to rustc to see if they'd be okay with keeping it.~~
EDIT: There was actually a `lookup_stability` function providing this information, so all good now!
cc `@epage`
changelog: create new [`incompatible_msrv`] lint
Consolidating rustc Dependencies
changelog: none
For dependencies in rustc where there are multiple versions used, this moves the older dependency to the newer dependency. These are the updates to clippy as mentioned here: https://github.com/rust-lang/rust/pull/120177
[`multiple_crate_versions`]: add a configuration option for allowed duplicate crates
Closes#12176
changelog: [`multiple_crate_versions`]: add a configuration option for allowed duplicate crates
respect `#[allow]` attributes in `single_call_fn` lint
Fixes#12182
If we delay linting to `check_crate_post`, we need to use `span_lint_hir_and_then`, since otherwise it would only respect those lint level attributes at the crate root.
<sub>... maybe we can have an internal lint for this somehow?</sub>
changelog: respect `#[allow]` attributes in `single_call_fn` lint
Don't emit `derive_partial_eq_without_eq` lint if the type has the `non_exhaustive` attribute
Part of https://github.com/rust-lang/rust-clippy/issues/9063.
If a type has a field/variant with the `#[non_exhaustive]` attribute or the type itself has it, then do no emit the `derive_partial_eq_without_eq` lint.
changelog: Don't emit `derive_partial_eq_without_eq` lint if the type has the `non_exhaustive` attribute
Pack u128 in the compiler to mitigate new alignment
This is based on #116672, adding a new `#[repr(packed(8))]` wrapper on `u128` to avoid changing any of the compiler's size assertions. This is needed in two places:
* `SwitchTargets`, otherwise its `SmallVec<[u128; 1]>` gets padded up to 32 bytes.
* `LitKind::Int`, so that entire `enum` can stay 24 bytes.
* This change definitely has far-reaching effects though, since it's public.
`unused_io_amount` captures `Ok(_)`s
Partial rewrite of `unused_io_amount` to lint over `Ok(_)` and `Ok(..)`.
Moved the check to `check_block` to simplify context checking for expressions and allow us to check only some expressions.
For match (expr, arms) we emit a lint for io ops used on `expr` when an arm is `Ok(_)|Ok(..)`. Also considers the cases when there are guards in the arms and `if let Ok(_) = ...` cases.
For `Ok(_)` and `Ok(..)` it emits a note indicating where the value is ignored.
changelog: False Negatives [`unused_io_amount`]: Extended `unused_io_amount` to catch `Ok(_)`s in `If let` and match exprs.
Closes#11713
r? `@giraffate`
Partial rewrite of `unused_io_account` to lint over Ok(_).
Moved the check to `check_block` to simplify context checking for
expressions and allow us to check only some expressions.
For match (expr, arms) we emit a lint for io ops used on `expr` when an
arm is `Ok(_)`. Also considers the cases when there are guards in the
arms. It also captures `if let Ok(_) = ...` cases.
For `Ok(_)` it emits a note indicating where the value is ignored.
changelog: False Negatives [`unused_io_amount`]: Extended
`unused_io_amount` to catch `Ok(_)`s in `If let` and match exprs.
Don't forget that the lifetime on hir types is `'tcx`
This PR just tracks the `'tcx` lifetime to wherever the original objects actually have that lifetime. This code is needed for https://github.com/rust-lang/rust/pull/107606 (now #120131) so that `ast_ty_to_ty` can invoke `lit_to_const` on an argument passed to it. Currently the argument is `&hir::Ty<'_>`, but after this PR it is `&'tcx hir::Ty<'tcx>`.
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`)
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
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.
Fix error warning span for issue12045
fixes [Issue#12045](https://github.com/rust-lang/rust-clippy/issues/12045)
In issue#12045, unexpected warning span occurs on attribute `#[derive(typed_builder::TypedBuilder)]`, actually the warning should underline `_lifetime`.
In the source code we can find that the original intend is to warning on `ident.span`, but in this case, `stmt.span` is unequal with `ident.span`. So, fix the nit here is fine.
Besides, `ident.span` have an accurate range than `stmt.span`.
changelog: [`no_effect_underscore_binding`]: correct warning span
fix FP on [`semicolon_if_nothing_returned`]
fixes: #12123
---
changelog: fix FP on [`semicolon_if_nothing_returned`] which suggesting adding semicolon after attr macro
Move async closure parameters into the resultant closure's future eagerly
Move async closure parameters into the closure's resultant future eagerly.
Before, we used to desugar `async |p1, p2, ..| { body }` as `|p1, p2, ..| { || async { body } }`. Now, we desugar the above like `|p1, p2, ..| { async move { let p1 = p1; let p2 = p2; ... body } }`. This mirrors the same desugaring that `async fn` does with its parameter types, and the compiler literally uses the same code via a shared helper function.
This removes the necessity for E0708, since now expressions like `async |x: i32| { x }` will not give you confusing borrow errors.
This does *not* fix the case where async closures have self-borrows. This will come with a general implementation of async closures, which is still in the works.
r? oli-obk
Fix [`multiple_crate_versions`] to correctly normalize package names to avoid missing the local one
Fixes#12145
changelog: [`multiple_crate_versions`]: correctly normalize package name
Correctly handle type relative in trait_duplication_in_bounds lint
Fixes#9961.
The generic bounds were not correctly checked and left out `QPath::TypeRelative`, making different bounds look the same and generating invalid errors (and fix).
r? `@blyxyas`
changelog: [`trait_duplication_in_bounds`]: Correctly handle type relative.
`read_zero_byte_vec` refactor for better heuristics
Fixes#9274
Previously, the implementation of `read_zero_byte_vec` only checks for the next statement after the vec init. This fails when there is a block with statements that are expanded and walked by the old visitor.
This PR refactors so that:
1. It checks if there is a `resize` on the vec
2. It works on blocks properly
e.g. This should properly lint now:
```
let mut v = Vec::new();
{
f.read(&mut v)?;
//~^ ERROR: reading zero byte data to `Vec`
}
```
changelog: [`read_zero_byte_vec`] Refactored for better heuristics
Add suspicious_open_options lint.
changelog: [`suspicious_open_options`]: Checks for the suspicious use of std::fs::OpenOptions::create() without an explicit OpenOptions::truncate().
create() alone will either create a new file or open an existing file. If the file already exists, it will be overwritten when written to, but the file will not be truncated by default. If less data is written to the file than it already contains, the remainder of the file will remain unchanged, and the end of the file will contain old data.
In most cases, one should either use `create_new` to ensure the file is created from scratch, or ensure `truncate` is called so that the truncation behaviour is explicit. `truncate(true)` will ensure the file is entirely overwritten with new data, whereas `truncate(false)` will explicitely keep the default behavior.
```rust
use std::fs::OpenOptions;
OpenOptions::new().create(true).truncate(true);
```
- [x] Followed [lint naming conventions][lint_naming]
- [x] Added passing UI tests (including committed `.stderr` file)
- [x] `cargo test` passes locally
- [x] Executed `cargo dev update_lints`
- [x] Added lint documentation
- [x] Run `cargo dev fmt`
Try to improve wording and fix dead link in description of arc_with_non_send_sync lint.
changelog: [`arc_with_non_send_sync`]: Improve wording and fix dead link.
Correctly suggest std or core path depending if this is a `no_std` crate
A few lints emit suggestions using `std` paths whether or not this is a `no_std` crate, which is an issue when running `rustfix` afterwards. So in case this is an item that is defined in both `std` and `core`, we need to check if the crate is `no_std` to emit the right path.
r? `@llogiq`
changelog: Correctly suggest std or core path depending if this is a `no_std` crate
- New ineffective_open_options had to be fixed.
- Now not raising an issue on missing `truncate` when `append(true)`
makes the intent clear.
- Try implementing more advanced tests for non-chained operations. Fail
Checks for the suspicious use of OpenOptions::create()
without an explicit OpenOptions::truncate().
create() alone will either create a new file or open an
existing file. If the file already exists, it will be
overwritten when written to, but the file will not be
truncated by default. If less data is written to the file
than it already contains, the remainder of the file will
remain unchanged, and the end of the file will contain old
data.
In most cases, one should either use `create_new` to ensure
the file is created from scratch, or ensure `truncate` is
called so that the truncation behaviour is explicit.
`truncate(true)` will ensure the file is entirely overwritten
with new data, whereas `truncate(false)` will explicitely
keep the default behavior.
```rust
use std::fs::OpenOptions;
OpenOptions::new().create(true).truncate(true);
```
[`useless_asref`]: check that the clone receiver is the parameter
Fixes#12135
There was no check for the receiver of the `clone` call in the map closure. This makes sure that it's a path to the parameter.
changelog: [`useless_asref`]: check that the clone receiver is the closure parameter
['arc_with_non_send_sync`] documentation edits
Arc's documentation uses the term "thread"; aligning to that terminology. Fix casing of "Rc".
changelog: None
There are cases where the closure call is needed in some macros, this in
particular occurs when the closure has parameters. To handle this case,
we allow the lint when there are no parameters in the closure, or the
closure is outside a macro invocation.
fixes: #11274, #1553
changelog: FP: [`redundant_closure_call`] when closures with parameters
are passed in macros.
Fix false positive in `PartialEq` check in `unconditional_recursion` lint
Fixes https://github.com/rust-lang/rust-clippy/issues/12133.
We needed to check for the type of the previous element <del>in case it's a field</del>.
EDIT: After some extra thoughts, no need to check if it's a field, just if it's the same type as `Self`.
r? `@llogiq`
changelog: Fix false positive in `PartialEq` check in `unconditional_recursion` lint
Fix suggestion for `map_clone` lint on types implementing `Copy`
Follow-up of https://github.com/rust-lang/rust-clippy/pull/12104.
It was missing this check to suggest the correct method.
r? `@llogiq`
changelog: Fix suggestion for `map_clone` lint on types implementing `Copy`
One consequence is that errors returned by
`maybe_new_parser_from_source_str` now must be consumed, so a bunch of
places that previously ignored those errors now cancel them. (Most of
them explicitly dropped the errors before. I guess that was to indicate
"we are explicitly ignoring these", though I'm not 100% sure.)
fix/issue#11243: allow 3-digit-grouped binary in non_octal_unix_permissions
fixes [Issue#11243](https://github.com/rust-lang/rust-clippy/issues/11243)
Issue#11243 suggest lint `non_octal_unix_permissions` should not report binary format literal unix permissions as an error, and we think binary format is a good way to understand these permissions.
To solve this problem, we need to add check for binary literal, which is written in function `check_binary_unix_permissions` , only `binary, 3 groups and each group length equals to 3` is a legal format.
changelog: [`non_octal_unix_permissions`]: Add check for binary format literal unix permissions like 0b111_111_111
Fixed ICE introduced in #12004
Issue: in https://github.com/rust-lang/rust-clippy/pull/12004, we emit a lint for `filter(Option::is_some)`. If the
parent expression is a `.map` we don't emit that lint as there exists a
more specialized lint for that.
The ICE introduced in https://github.com/rust-lang/rust-clippy/pull/12004 is a consequence of the assumption that a
parent expression after a filter would be a method call with the filter
call being the receiver. However, it is entirely possible to have a
closure of the form
```
|| { vec![Some(1), None].into_iter().filter(Option::is_some) }
```
The previous implementation looked at the parent expression; namely the
closure, and tried to check the parameters by indexing [0] on an empty
list.
This commit is an overhaul of the lint with significantly more FP tests
and checks.
Impl details:
1. We verify that the filter method we are in is a proper trait method
to avoid FPs.
2. We check that the parent expression is not a map by checking whether
it exists; if is a trait method; and then a method call.
3. We check that we don't have comments in the span.
4. We verify that we are in an Iterator of Option and Result.
5. We check the contents of the filter.
1. For closures we peel it. If it is not a single expression, we don't
lint. We then try again by checking the peeled expression.
2. For paths, we do a typecheck to avoid FPs for types that impl
functions with the same names.
3. For calls, we verify the type, via the path, and that the param of
the closure is the single argument to the call.
4. For method calls we verify that the receiver is the parameter of
the closure. Since we handle single, non-block exprs, the
parameter can't be shadowed, so no FP.
This commit also adds additional FP tests.
Fixes: #12058
Adding `@xFrednet` as you've the most context for this as you reviewed it last time.
`@rustbot` r? `@xFrednet`
---
changelog: none
(Will be backported and therefore don't effect stable)
Issue: in #12004, we emit a lint for `filter(Option::is_some)`. If the
parent expression is a `.map` we don't emit that lint as there exists a
more specialized lint for that.
The ICE introduced in #12004 is a consequence of the assumption that a
parent expression after a filter would be a method call with the filter
call being the receiver. However, it is entirely possible to have a
closure of the form
```
|| { vec![Some(1), None].into_iter().filter(Option::is_some) }
```
The previous implementation looked at the parent expression; namely the
closure, and tried to check the parameters by indexing [0] on an empty
list.
This commit is an overhaul of the lint with significantly more FP tests
and checks.
Impl details:
1. We verify that the filter method we are in is a proper trait method
to avoid FPs.
2. We check that the parent expression is not a map by checking whether
it exists; if is a trait method; and then a method call.
3. We check that we don't have comments in the span.
4. We verify that we are in an Iterator of Option and Result.
5. We check the contents of the filter.
1. For closures we peel it. If it is not a single expression, we don't
lint.
2. For paths, we do a typecheck to avoid FPs for types that impl
functions with the same names.
3. For calls, we verify the type, via the path, and that the param of
the closure is the single argument to the call.
4. For method calls we verify that the receiver is the parameter of
the closure. Since we handle single, non-block exprs, the
parameter can't be shadowed, so no FP.
This commit also adds additional FP tests.
Handle "calls" inside the closure as well in `map_clone` lint
Follow-up of https://github.com/rust-lang/rust-clippy/pull/12104.
I just realized that I didn't handle the case where the `clone` method was made as a call and not a method call.
r? `@llogiq`
changelog: Handle "calls" inside the closure as well in `map_clone` lint
improve [`cast_sign_loss`], to skip warning on always positive expressions
fixes: #11642
changelog: improve [`cast_sign_loss`] to skip warning on always positive expressions
Turns out this is change became quite big, and I still can't cover all the cases, like method calls such as `POSITIVE_NUM.mul(POSITIVE_NUM)`, or `NEGATIVE_NUM.div(NEGATIVE_NUM)`... but well, if I do, I'm scared that this will goes forever, so I stopped, unless it needs to be done, lol.
Do not suggest `[T; n]` instead of `vec![T; n]` if `T` is not `Copy`
changelog: [`useless_vec`]: do not suggest replacing `&vec![T; N]` by `&[T; N]` if `T` is not `Copy`
Fix#11958
Extend `map_clone` lint to also work on non-explicit closures
I found it weird that this case was not handled by the current line so I added it. The only thing is that I don't see an obvious way to infer the current type to determine if it's copyable or not, so for now I always suggest `cloned` and I added a FIXME.
r? `@llogiq`
changelog: Extend `map_clone` lint to also work on non-explicit closures
rustc_span: Optimize syntax context comparisons
Including comparisons with root context.
- `eq_ctxt` doesn't require retrieving full `SpanData`, or taking the span interner lock twice.
- Checking `SyntaxContext` for "rootness" is cheaper than extracting a full outer `ExpnData` for it and checking *it* for rootness.
The internal lint for `eq_ctxt` is also tweaked to detect `a.ctxt() != b.ctxt()` in addition to `a.ctxt() == b.ctxt()`.
Fix scoping for let chains in match guards
If let guards were previously represented as a different type of guard in HIR and THIR. This meant that let chains in match guards were not handled correctly because they were treated exactly like normal guards.
- Remove `hir::Guard` and `thir::Guard`.
- Make the scoping different between normal guards and if let guards also check for let chains.
closes#118593
Don't emit `struct_field_names` lint if all fields are booleans and don't start with the type's name
Fixes#11936.
I only checked that all fields are booleans and not the prefix (nor the suffix) because when I started to list accepted prefixes (like "is", "has", "should", "could", etc), the list was starting to get a bit too long and I thought it was not really worth for such a small change.
r? `@llogiq`
changelog: Don't emit `struct_field_names` lint if all fields are booleans and don't start with the type's name
Don't lint `let_unit_value` when `()` is explicit
since these are explicitly written (and not the result of a function call or anything else), they should be allowed, as they are both useful in some cases described in #9048Fixes#9048
changelog: [`let_unit_value`]: Don't lint when `()` is explicit
Polish `missing_enforced_import_renames` documentation
* Fixes a typo in the name of the lint (`enforce-import-renames` instead of `enforced-import-renames`).
* Copyedit “Why” paragraph.
* Make the example configuration use a multi-line list, since it is not particularly expected that a real project will have *exactly one* rename to enforce (and the old formatting had unbalanced whitespace).
changelog: none
Don't look for safety comments in doc tests
Fixes#12048.
What happened in the linked issue is that the lint checks for lines that start with `//` and have `SAFETY:` somewhere in it above the function item.
This works for regular comments, but when the `//` is the start of a doc comment (e.g. `/// // SAFETY: ...`) and it's part of a doc test (i.e. within \`\`\`), we probably shouldn't lint that, since the user most likely meant to refer to a different node than the one currently being checked. For example in the linked issue, the safety comment refers to `unsafe { *five_pointer }`, but the lint believes it's part of the function item.
We also can't really easily test whether the `// SAFETY:` comment within a doc comment is necessary or not, since I think that would require creating a new compiler session to re-parse the contents of the doc comment. We already do this for one of the doc markdown lints, to look for a main function in doc tests, but I don't know how to feel about doing that in more places, so probably best to just ignore them?
changelog: [`unnecessary_safety_comment`]: don't look for safety comments in doc tests
Add .as_ref() to suggestion to remove .to_string()
The case of `.to_owned().split(…)` is treated specially in the `unnecessary_to_owned` lint. Test cases check that it works both for slices and for strings, but they missed a corner case: `x.to_string().split(…)` when `x` implements `AsRef<str>` but not `Deref<Target = str>`. In this case, it is wrong to suggest to remove `.to_string()` without adding `.as_ref()` instead.
Fix#12068
changelog: [`unnecessary_to_owned`]: suggest replacing `.to_string()` by `.as_ref()`
new lint: `option_as_ref_cloned`
Closes#12009
Adds a new lint that looks for `.as_ref().cloned()` on `Option`s. That's the same as just `.clone()`-ing the option directly.
changelog: new lint: [`option_as_ref_cloned`]
Extend `unconditional_recursion` lint to check for `Default` trait implementation
In case the `Default` trait is implemented manually and is calling a static method (let's call it `a`) and then `a` is using `Self::default()`, it makes an infinite call recursion difficult to see without debugging. This extension checks that there is no such recursion possible.
r? `@llogiq`
changelog: Extend `unconditional_recursion` lint to check for `Default` trait implementation
Lint nested binary operations and handle field projections in `eager_transmute`
This PR makes the lint a bit stronger. Previously it would only lint `(x < 4).then_some(transmute(x))` (that is, a single binary op in the condition). With this change, it understands:
- multiple, nested binary ops: `(x < 4 && x > 1).then_some(...)`
- local references with projections: `(x.field < 4 && x.field > 1).then_some(transmute(x.field))`
changelog: [`eager_transmute`]: lint nested binary operations and look through field/array accesses
r? llogiq (since you reviewed my initial PR #11981, I figured you have the most context here, sorry if you are too busy with other PRs, feel free to reassign to someone else then)
Fix false positive `unconditional_recursion`
Fixes#12052.
Only checking if both variables are `local` was not enough, we also need to confirm they have the same type as `Self`.
changelog: Fix false positive for `unconditional_recursion` lint
Fixes: #12050 - `identity_op` correctly suggests a deference for coerced references
When `identity_op` identifies a `no_op`, provides a suggestion, it also checks the type of the type of the variable. If the variable is a reference that's been coerced into a value, e.g.
```
let x = &0i32;
let _ = x + 0;
```
the suggestion will now use a derefence. This is done by identifying whether the variable is a reference to an integral value, and then whether it gets dereferenced.
changelog: false positive: [`identity_op`]: corrected suggestion for reference coerced to value.
fixes: #12050
Adds a new lint to suggest using `const` on `thread_local!`
initializers that can be evaluated at compile time.
Impl details:
The lint relies on the expansion of `thread_local!`. For non
const-labelled initializers, `thread_local!` produces a function
called `__init` that lazily initializes the value. We check the function
and decide whether the body can be const. The body of the function is
exactly the initializer. If so, we lint the body.
changelog: new lint [`thread_local_initializer_can_be_made_const`]
Extend UNCONDITIONAL_RECURSION to check for ToString implementations
Follow-up of https://github.com/rust-lang/rust-clippy/pull/11938.
r? `@llogiq`
changelog: Extend `UNCONDITIONAL_RECURSION` to check for `ToString` implementations
New Lint: empty_enum_variants_with_brackets
This PR:
- adds a new early pass lint that checks for enum variants with no fields that were defined using brackets. **Category: Restriction**
- adds relevant UI tests for the new lint.
Closes#12007
```
changelog: New lint: [`empty_enum_variants_with_brackets`]
```
don't lint [`default_numeric_fallback`] on return and local assigned macro calls with type stated
fixes: #11535
changelog: don't lint [`default_numeric_fallback`] on return and local assigned macro calls with type stated
feat: add `manual_is_variant_and` lint
changelog: add a new lint [`manual_is_variant_and`].
- Replace `option.map(f).unwrap_or_default()` and `result.map(f).unwrap_or_default()` with `option.is_some_and(f)` and `result.is_ok_and(f)` where `f` is a function or closure that returns `bool`.
- MSRV is set to 1.70.0 for this lint; when `is_some_and` and `is_ok_and` was stabilised
---
For example, for the following code:
```rust
let opt = Some(0);
opt.map(|x| x > 1).unwrap_or_default();
```
It suggests to instead write:
```rust
let opt = Some(0);
opt.is_some_and(|x| x > 1)
```
make [`mutex_atomic`] more type aware
fixes: #9872
---
changelog: [`mutex_atomic`] now suggests more specific atomic types and skips mutex i128 and u128
When `identity_op` identifies a `no_op`, provides a suggestion, it also
checks the type of the type of the variable. If the variable is
a reference that's been coerced into a value, e.g.
```
let x = &0i32;
let _ = x + 0;
```
the suggestion will now use a derefence. This is done by identifying
whether the variable is a reference to an integral value, and then
whether it gets dereferenced.
changelog: false positive: [`identity_op`]: corrected suggestion for
reference coerced to value.
fixes: #12050
feature: add new lint `pub_underscore_fields`
fixes: #10282
This PR introduces a new lint `pub_underscore_fields` that lints when a user has marked a field of a struct as public, but also prefixed it with an underscore (`_`). This is something users should avoid because the two ideas are contradictory. Prefixing a field with an `_` is inferred as the field being unused, but making a field public infers that it will be used.
- \[x] Followed [lint naming conventions][lint_naming]
- I believe I followed the naming conventions, more than happy to update the naming if I did not :)
- \[x] Added passing UI tests (including committed `.stderr` file)
- \[x] `cargo test` passes locally
- \[x] Executed `cargo dev update_lints`
- \[x] Added lint documentation
- \[x] Run `cargo dev fmt`
---
changelog: new lint: [`pub_underscore_fields`]
[#10283](https://github.com/rust-lang/rust-clippy/pull/10283)
<!-- changelog_checked -->
- add a new late pass lint, with config options
- add ui tests for both variations of config option
- update CHANGELOG.md
github feedback
bump version to 1.77 and run cargo collect-metadata
Change `,` to `;` in `conf.rs`
* Fixes a typo in the name of the lint (`enforce-import-renames`
instead of `enforced-import-renames`).
* Copyedit “Why” paragraph.
* Make the example configuration use a multi-line list, since it is not
particularly expected that a real project will have *exactly one*
rename to enforce (and the old formatting had unbalanced whitespace).
new lint: `eager_transmute`
A small but still hopefully useful lint that looks for patterns such as `(x < 5).then_some(transmute(x))`.
This is almost certainly wrong because it evaluates the transmute eagerly and can lead to surprises such as the check being completely removed and always evaluating to `Some` no matter what `x` is (it is UB after all when the integer is not a valid bitpattern for the transmuted-to type). [Example](https://godbolt.org/z/xoY34fPzh).
The user most likely meant to use `then` instead.
I can't remember where I saw this but this is inspired by a real bug that happened in practice.
This could probably be a correctness lint?
changelog: new lint: [`eager_int_transmute`]
Return with a question mark was triggered in situations where the `?`
desuraging was performing error conversion via `Into`/`From`.
The desugared `?` produces a match over an expression with type
`std::ops::ControlFlow<B,C>` with `B:Result<Infallible, E:Error>` and
`C:Result<_, E':Error>`, and the arms perform the conversion. The patch
adds another check in the lint that checks that `E == E'`. If `E == E'`,
then the `?` is indeed unnecessary.
changelog: False Positive: `needless_return_with_question_mark` when
implicit Error Conversion occurs.
New lints `iter_filter_is_some` and `iter_filter_is_ok`
Adds a pair of lints that check for cases of an iterator over `Result` and `Option` followed by `filter` without being followed by `map` as that is covered already by a different, specialized lint.
Fixes#11843
PS, I also made some minor documentations fixes in a case where a double tick (`) was included.
---
changelog: New Lint: [`iter_filter_is_some`]
[#12004](https://github.com/rust-lang/rust/pull/12004)
changelog: New Lint: [`iter_filter_is_ok`]
[#12004](https://github.com/rust-lang/rust/pull/12004)
Make closures carry their own ClosureKind
Right now, we use the "`movability`" field of `hir::Closure` to distinguish a closure and a coroutine. This is paired together with the `CoroutineKind`, which is located not in the `hir::Closure`, but the `hir::Body`. This is strange and redundant.
This PR introduces `ClosureKind` with two variants -- `Closure` and `Coroutine`, which is put into `hir::Closure`. The `CoroutineKind` is thus removed from `hir::Body`, and `Option<Movability>` no longer needs to be a stand-in for "is this a closure or a coroutine".
r? eholk
Do not consider `async { (impl IntoFuture).await }` as redundant
changelog: [`redundant_async_block`]: do not trigger on `IntoFuture` instances
Fix#11959
Move `uninhabited_references` to `nursery`
I think this lint has too many false positives and should be put in pedantic. See #11984 and #11985 for context.
The lint is already in beta and is causing trouble for us, so I would also like this PR to be backported to beta as well.
changelog: Moved [`uninhabited_references`] to `nursery` (Now allow-by-default)
[#11997](https://github.com/rust-lang/rust-clippy/pull/11997)
(Check if this has been backported)
Fixes#11984.
[`question_mark`]: also trigger on `return` statements
This fixes the false negative mentioned in #11993: the lint only used to check for `return` expressions, and not a statement containing a `return` expression (doesn't close the issue tho since there's still a useful suggestion that we could make, which is to suggest `.ok_or()?`/`.ok_or_else()?` for `else { return Err(..) }`)
changelog: [`question_mark`]: also trigger on `return` statements
Clairify `ast::PatKind::Struct` presese of `..` by using an enum instead of a bool
The bool is mainly used for when a `..` is present, but it is also set on recovery to avoid errors. The doc comment not describes both of these cases.
See cee794ee98/compiler/rustc_parse/src/parser/pat.rs (L890-L897) for the only place this is constructed.
r? ``@compiler-errors``
fix typo in infinite loop lint
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: This fixes a small typo introduced in https://github.com/rust-lang/rust-clippy/pull/11829
Extend `UNNECESSARY_TO_OWNED` to handle `split`
Fixes https://github.com/rust-lang/rust-clippy/issues/9965.
When you have `to_string().split('a')` or equivalent, it'll suggest to remove the `to_owned`/`to_string` part.
r? `@flip1995`
changelog: Extend `UNNECESSARY_TO_OWNED` to handle `split`
Check whether out of bound when access a known length array with a constant index
fixes [Issue#11762](https://github.com/rust-lang/rust-clippy/issues/11762)
Issue#11762 points that `Array references with known length are not flagged when indexed out of bounds`.
To fix this problem, it is needed to add check for `Expr::Index`. We expand this issue include reference and direct accessing a array.
When we access a array with a constant index `off`, and already know the length `size`, if `off >= size`, these code will throw an error, instead rustc's lint checking them or runtime panic happening.
changelog: [`out_of_bound_indexing`]: Add check for illegal accessing known length array with a constant index
Add support for `for await` loops
This adds support for `for await` loops. This includes parsing, desugaring in AST->HIR lowering, and adding some support functions to the library.
Given a loop like:
```rust
for await i in iter {
...
}
```
this is desugared to something like:
```rust
let mut iter = iter.into_async_iter();
while let Some(i) = loop {
match core::pin::Pin::new(&mut iter).poll_next(cx) {
Poll::Ready(i) => break i,
Poll::Pending => yield,
}
} {
...
}
```
This PR also adds a basic `IntoAsyncIterator` trait. This is partly for symmetry with the way `Iterator` and `IntoIterator` work. The other reason is that for async iterators it's helpful to have a place apart from the data structure being iterated over to store state. `IntoAsyncIterator` gives us a good place to do this.
I've gated this feature behind `async_for_loop` and opened #118898 as the feature tracking issue.
r? `@compiler-errors`
Adds a pair of lints that check for cases of an iterator over `Result`
and `Option` followed by `filter` without being followed by `map` as
that is covered already by a different, specialized lint.
changelog: New Lint: [`iter_filter_is_some`]
changelog: New Lint: [`iter_filter_is_ok`]
New Lint: `result_filter_map` / Mirror of `option_filter_map`
Added the `Result` mirror of `option_filter_map`.
changelog: New Lint: [`result_filter_map`]
I had to move around some code because the function def was too long 🙃.
I have also added some pattern checks on `option_filter_map`
Add new `unconditional_recursion` lint
Currently, rustc `unconditional_recursion` doesn't detect cases like:
```rust
enum Foo {
A,
B,
}
impl PartialEq for Foo {
fn eq(&self, other: &Self) -> bool {
self == other
}
}
```
This is because the lint is currently implemented only for one level, and in the above code, `self == other` will then call `impl PartialEq for &T`, escaping from the detection. The fix for it seems to be a bit tricky (I started investigating potential solution to add one extra level of recursion [here](https://github.com/rust-lang/rust/compare/master...GuillaumeGomez:rust:trait-impl-recursion?expand=1) but completely broken at the moment).
I expect that this situation will remain for a while. In the meantime, I think it's acceptable to check it directly into clippy for the time being as a lot of easy cases like this one can be easily checked (next I plan to extend it to cover other traits like `ToString`).
changelog: Add new `unconditional_recursion` lint
Added the `Result` mirror of `option_filter_map` to catch
```
.into_iter().filter(Result::is_ok).map(Result::unwrap)
```
changelog: New Lint: [`result_filter_map`]
Co-authored-by: Alex Macleod <alex@macleod.io>
Uplift `TypeAndMut` and `ClosureKind` to `rustc_type_ir`
Uplifts `TypeAndMut` and `ClosureKind`
I know I said I was just going to get rid of `TypeAndMut` (https://github.com/rust-lang/types-team/issues/124) but I think this is much simpler, lol
r? `@jackh726` or `@lcnr`
Fix binder handling in `unnecessary_to_owned`
fixes#11952
The use of `rebind` instead of `EarlyBinder::bind` isn't technically needed, but it is the semantically correct operation.
changelog: None
[`doc_markdown`] Recognize words followed by empty parentheses `()` for quoting
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: [`doc_markdown`] Recognize words followed by empty parentheses for quoting, e.g. `func()`.
---
Developers often write function/method names with trailing `()`, but `doc_markdown` lint did not consider that.
Old clippy suggestion was not very good:
```patch
-/// There is no try (do() or do_not()).
+/// There is no try (do() or `do_not`()).
```
New behavior recognizes function names such as `do()` even they contain no `_`/`::`; and backticks are suggested outside of the `()`:
```patch
-/// There is no try (do() or do_not()).
+/// There is no try (`do()` or `do_not()`).
```
Useless vec false positive
changelog: [`useless_vec`]: fix false positive in macros.
fixes#11861
We delay the emission of `useless_vec` lints to the check_crate_post stage, which allows us to effectively undo lints if we find that a `vec![]` expression is being used multiple times after macro expansion.
new lint to detect infinite loop
closes: #11438
changelog: add new lint to detect infinite loop
~*I'll change the lint name*~. Should I name it `infinite_loop` or `infinite_loops` is fine? Ahhhh, English is hard...
Renamings:
- find -> opt_hir_node
- get -> hir_node
- find_by_def_id -> opt_hir_node_by_def_id
- get_by_def_id -> hir_node_by_def_id
Fix rebase changes using removed methods
Use `tcx.hir_node_by_def_id()` whenever possible in compiler
Fix clippy errors
Fix compiler
Apply suggestions from code review
Co-authored-by: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Add FIXME for `tcx.hir()` returned type about its removal
Simplify with with `tcx.hir_node_by_def_id`
