Handle write!(buf, "\n") case better
Make `write!(buf, "\n")` suggest `writeln!(buf)` by removing
the trailing comma from `writeln!(buf, )`.
changelog: [`write_with_newline`] suggestion on only "\n" improved
Make `write!(buf, "\n")` suggest `writeln!(buf)` by removing
the trailing comma from `writeln!(buf, )`.
changelog: [`write_with_newline`] suggestion on only "\n" improved
It relaxes rules for `to_*` variant, so it doesn't lint in trait definitions
and implementations anymore.
Although, non-`Copy` type implementing trait's `to_*` method taking
`self` feels not good (consumes ownership, so should be rather named `into_`), it would be better if this case was a pedantic lint (allow-by-default) instead.
Refactor: arrange lints in misc_early module
This PR arranges misc_early lints so that they can be accessed more easily.
Basically, I refactored them following the instruction described in #6680.
cc: `@Y-Nak,` `@flip1995,` `@magurotuna`
changelog: Move lints in misc_early module into their own modules.
Fix stack overflow issue in `redundant_pattern_matching`
Fixes#7169
~~cc `@Jarcho` Since tomorrow is release day and we need to get this also fixed in beta, I'll just revert the PR instead of looking into the root issue. Your changes are good, so if you have an idea what could cause this stack overflow and know how to fix it, please open a PR that reverts this revert with a fix.~~
r? `@llogiq`
changelog: none (fixes stack overflow, but this was introduced in this release cycle)
needless_collect: Lint cases with type annotations for indirect usage and recognize `BinaryHeap`
fixes#7110
changelog: needless_collect: Lint cases with type annotations for indirect usage and recognize `BinaryHeap`.
Producing a good suggestion for this lint is already hard when no macros
are involved. With macros the lint message and the suggestion are just
confusing. Since both, producing a good suggestion and figuring out if
this pattern can be re-written inside a macro is nearly impossible, just
bail out.
Update BARE_TRAIT_OBJECT and ELLIPSIS_INCLUSIVE_RANGE_PATTERNS to errors in Rust 2021
This addresses https://github.com/rust-lang/rust/pull/81244 by updating two lints to errors in the Rust 2021 edition.
r? `@estebank`
[single_char_pattern] add strip_prefix and strip_suffix
Title says it all. Adjusted ui tests.
I added the second commit in case you don't like that I moved that table into `single_char_pattern.rs` directly. I don't see any reason why it shouldn't be in that file. It isn't used anywhere else.
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: add strip_prefix and strip_suffix to single_char_pattern lint
while_immutable_cond: check condition for mutation
This fixes#6689 by also checking the bindings mutated in the condition, whereas it was previously only checked in the loop body.
---
changelog: Fix FP in [`while_immutable_cond`] where mutation in the loop variable wasn't picked up.
`implicit_return` improvements
fixes: #6940
changelog: Fix `implicit_return` suggestion for async functions
changelog: Improve `implicit_return` suggestions when returning the result of a macro
changelog: Check for `break` expressions inside a loop which are then implicitly returned
changelog: Allow all diverging functions in `implicit_return`, not just panic functions
Implement `x.py test src/tools/clippy --bless`
- Add clippy_dev to the rust workspace
Before, it would give an error that it wasn't either included or
excluded from the workspace:
```
error: current package believes it's in a workspace when it's not:
current: /home/joshua/rustc/src/tools/clippy/clippy_dev/Cargo.toml
workspace: /home/joshua/rustc/Cargo.toml
this may be fixable by adding `src/tools/clippy/clippy_dev` to the `workspace.members` array of the manifest located at: /home/joshua/rustc/Cargo.toml
Alternatively, to keep it out of the workspace, add the package to the `workspace.exclude` array, or add an empty `[workspace]` table to the package's manifest.
```
- Change clippy's copy of compiletest not to special-case
rust-lang/rust. Using OUT_DIR confused `clippy_dev` and it couldn't find
the test outputs. This is one of the reasons why `cargo dev bless` used
to silently do nothing (the others were that `CARGO_TARGET_DIR` and
`PROFILE` weren't set appropriately).
- Run clippy_dev on test failure
I tested this by removing a couple lines from a stderr file, and they
were correctly replaced.
- Fix clippy_dev warnings
- Add clippy_dev to the rust workspace
Before, it would give an error that it wasn't either included or
excluded from the workspace:
```
error: current package believes it's in a workspace when it's not:
current: /home/joshua/rustc/src/tools/clippy/clippy_dev/Cargo.toml
workspace: /home/joshua/rustc/Cargo.toml
this may be fixable by adding `src/tools/clippy/clippy_dev` to the `workspace.members` array of the manifest located at: /home/joshua/rustc/Cargo.toml
Alternatively, to keep it out of the workspace, add the package to the `workspace.exclude` array, or add an empty `[workspace]` table to the package's manifest.
```
- Change clippy's copy of compiletest not to special-case
rust-lang/rust. Using OUT_DIR confused `clippy_dev` and it couldn't find
the test outputs. This is one of the reasons why `cargo dev bless` used
to silently do nothing (the others were that `CARGO_TARGET_DIR` and
`PROFILE` weren't set appropriately).
- Run clippy_dev on test failure
I tested this by removing a couple lines from a stderr file, and they
were correctly replaced.
- Fix clippy_dev warnings
Fix FN in `iter_cloned_collect` with a large array
fixes#6808
changelog: Fix FN in `iter_cloned_collect` with a large array
I spotted that [is_iterable_array](a362a4d1d0/clippy_lints/src/loops/explicit_iter_loop.rs (L67-L75)) function that `explicit_iter_loop` lint is using only works for array sizes <= 32.
There is this comment:
> IntoIterator is currently only implemented for array sizes <= 32 in rustc
I'm a bit confused, because I read that [IntoIterator for arrays](https://doc.rust-lang.org/src/core/array/mod.rs.html#194-201) with const generic `N` is stable since = "1.0.0". Although Const Generics MVP were stabilized in Rust 1.51.
Should I set MSRV for the current change? I will try to test with older compilers soon.
manual_unwrap_or: fix invalid code suggestion, due to macro expansion
fixes#6965
changelog: fix invalid code suggestion in `manual_unwrap_or` lint, due to macro expansion
`single_component_path_imports`: ignore `pub(crate) use some_macro;`
Fixes#7106
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: Ignore exporting a macro within a crate using `pub(crate) use some_macro;` for [`single_component_path_imports`]
Unused io amount detects `.read().ok()?`
fixes#7096
changelog: unused_io_amount now detect expertion like `.read().ok()?`, `.read().or_else(|err| ...)?` and similar expressions.
Better suggestions when returning macro calls.
Suggest changeing all the break expressions in a loop, not just the final statement.
Don't lint divergent functions.
Don't suggest returning the result of any divergent fuction.
Add lint to check for boolean comparison in assert macro calls
This PR adds a lint to check if an assert macro is using a boolean as "comparison value". For example:
```rust
assert_eq!("a".is_empty(), false);
```
Could be rewritten as:
```rust
assert!(!"a".is_empty());
```
PS: The dev guidelines are amazing. Thanks a lot for writing them!
changelog: Add `bool_assert_comparison` lint
useless use of format! should return function directly
fixes#7066
changelog: [`useless_format`] wraps the content in the braces when it's needed.
r? `@giraffate`
Add `Unsupported` to `std::io::ErrorKind`
I noticed a significant portion of the uses of `ErrorKind::Other` in std is for unsupported operations.
The notion that a specific operation is not available on a target (and will thus never succeed) seems semantically distinct enough from just "an unspecified error occurred", which is why I am proposing to add the variant `Unsupported` to `std::io::ErrorKind`.
**Implementation**:
The following variant will be added to `std::io::ErrorKind`:
```rust
/// This operation is unsupported on this platform.
Unsupported
```
`std::io::ErrorKind::Unsupported` is an error returned when a given operation is not supported on a platform, and will thus never succeed; there is no way for the software to recover. It will be used instead of `Other` where appropriate, e.g. on wasm for file and network operations.
`decode_error_kind` will be updated to decode operating system errors to `Unsupported`:
- Unix and VxWorks: `libc::ENOSYS`
- Windows: `c::ERROR_CALL_NOT_IMPLEMENTED`
- WASI: `wasi::ERRNO_NOSYS`
**Stability**:
This changes the kind of error returned by some functions on some platforms, which I think is not covered by the stability guarantees of the std? User code could depend on this behavior, expecting `ErrorKind::Other`, however the docs already mention:
> Errors that are `Other` now may move to a different or a new `ErrorKind` variant in the future. It is not recommended to match an error against `Other` and to expect any additional characteristics, e.g., a specific `Error::raw_os_error` return value.
The most recent variant added to `ErrorKind` was `UnexpectedEof` in `1.6.0` (almost 5 years ago), but `ErrorKind` is marked as `#[non_exhaustive]` and the docs warn about exhaustively matching on it, so adding a new variant per se should not be a breaking change.
The variant `Unsupported` itself could be marked as `#[unstable]`, however, because this PR also immediately uses this new variant and changes the errors returned by functions I'm inclined to agree with the others in this thread that the variant should be insta-stabilized.
Allow allman style braces in `suspicious_else_formatting`
fixes: #3864
Indentation checks could be added as well, but the lint already doesn't check for it.
changelog: Allow allman style braces in `suspicious_else_formatting`
Fixing FPs for the `branches_sharing_code` lint
Fixes#7053Fixes#7054
And an additional CSS adjustment to support dark mode for every inline code. It currently only works in paragraphs, which was an oversight on my part 😅. [Current Example](https://rust-lang.github.io/rust-clippy/master/index.html#blacklisted_name)
This also includes ~50 lines of doc comments and is therefor not as big as the changes would indicate. 🐧
---
changelog: none
All of these bugs were introduced in this dev version and are therefor not worth a change log entry.
r? `@phansch`
cc: `@camsteffen` since you have a pretty good overview of the `SpanlessEq` implementation 🙃
Add `cloned_instead_of_copied` lint
Don't go cloning all willy-nilly.
Featuring a new `get_iterator_item_ty` util!
changelog: Add cloned_instead_of_copied lint
Closes#3870
Fix: redundant_pattern_matching drop order
Fixes#5746
A note about the change in drop order is added when the scrutinee (or any temporary in the expression) isn't known to be safe to drop in any order (i.e. doesn't implement the `Drop` trait, or contain such a type). There is a whitelist for some `std` types, but it's incomplete. Currently just `Vec<_>`, `Box<_>`, `Rc<_>` and `Arc<_>`, but only if the contained type is also safe to drop in any order.
Another lint for when the drop order changes could be added as allowed by default, but the drop order requirement is pretty subtle in this case. I think the note added to the lint should be enough to make someone think before applying the change.
changelog: Added a note to `redundant_pattern_matching` when the change in drop order might matter
Improve `map_entry` suggestion
fixes: #5176fixes: #4674fixes: #4664fixes: #1450
Still need to handle the value returned by `insert` correctly.
changelog: Improve `map_entry` suggestion. Will now suggest `or_insert`, `insert_with` or `match _.entry(_)` as appopriate.
changelog: Fix `map_entry` false positives where the entry api can't be used. e.g. when the map is used for multiple things.
Don't allow adjustments for `manual_map`
fixes: #7077
The other option here would be to add the return type to the closure. It would be fine for simple types, but longer types can be rather unwieldy. Could also implement the adjustment manually.
changelog: Don't lint `manual_map` when type adjustments are added. e.g. autoderef
Fix false positives where the map is used before inserting into the map.
Fix false positives where two insertions happen.
Suggest using `if let Entry::Vacant(e) = _.entry(_)` when `or_insert` might be a semantic change
tabs_in_doc_comments: Fix ICE due to char indexing
This is a quick-fix for an ICE in `tabs_in_doc_comments`. The problem
was that we we're indexing into possibly multi-byte characters, such as '位'.
More specifically `get_chunks_of_tabs` was returning indices into
multi-byte characters. Those were passed on to a `Span` creation that
then caused the ICE.
This fix makes sure that we don't return indices that point inside a
multi-byte character. *However*, we are still iterating over unicode
codepoints, not grapheme clusters. So a seemingly single character like y̆ ,
which actually consists of two codepoints, will probably still cause
incorrect spans in the output. But I don't think we handle those cases
anywhere in Clippy currently?
Fixes#5835
changelog: Fix ICE in `tabs_in_doc_comments`
Fix FP in `wrong_self_convention` lint
Previously, this lint didn't check into impl block when it was implementing a trait.
Recent improvements (#6924) have moved this check and some impl blocks are now checked but they shouldn't, such as in #7032.
Fixes#7032
changelog: Fix FP when not taking `self` in impl block for `wrong_self_convention` lint
Deprecate `filter_map`
Since #6591, `filter_map` does not even lint `filter().map()`. The cases that are still linted make no sense IMO. So this just removes/deprecates it.
changelog: Deprecate `filter_map` lint
Closes#3424Fixes#7050
Fix FP in `single_component_path_imports` lint
Fix FP in `single_component_path_imports` lint when the import is reused with `self`, like in `use self::module`.
Fixes#5210
changelog: none
Invalid null usage v2
This is continuation of #6192 after inactivity.
I plan to move paths into the compiler as diagnostic items after this is merged.
fixes#1703
changelog: none
consider mutability on useless_vec suggestions
fixes#7035
changelog: Now the suggested by `useless_vec` considers mutability to suggest either `&[]`, as before, or `&mut []` if the used reference is mutable.
This is a quick-fix for an ICE in `tabs_in_doc_comments`. The problem
was that we we're indexing into possibly multi-byte characters, such as '位'.
More specifically `get_chunks_of_tabs` was returning indices into
multi-byte characters. Those were passed on to a `Span` creation that
then caused the ICE.
This fix makes sure that we don't return indices that point inside a
multi-byte character. *However*, we are still iterating over unicode
codepoints, not grapheme clusters. So a seemingly single character like y̆ ,
which actually consists of two codepoints, will probably still cause
incorrect spans in the output.
Don't trigger `same_item_push` if the vec is used in the loop body
fixes#6987
changelog: `same_item_push`: Don't trigger if the `vec` is used in the loop body
fix `missing_panics_doc` not detecting `assert_eq!` and `assert_ne!`
fixes#6997
changelog: `missing_panics_doc` detects `assert_eq!` and `assert_ne!`
---
searching for `assert_eq!` and `assert_ne!` in `FindPanicUnwrap`
New Lint: `branches_sharing_code`
This lint checks if all `if`-blocks contain some statements that are the same and can be moved out of the blocks to prevent code duplication. Here is an example:
```rust
let _ = if ... {
println!("Start"); // <-- Lint for code duplication
let _a = 99;
println!("End"); // <-- Lint for code duplication
false
} else {
println!("Start");
let _b = 17;
println!("End");
false
};
```
This could be written as:
```rust
println!("Start");
let _ = if ... {
let _a = 99;
false
} else {
let _b = 17;
false
};
println!("End");
```
---
This lint will get masked by the `IF_SAME_THEN_ELSE` lint. I think it makes more sense to only emit one lint per if block. This means that the folloing example:
```rust
if ... {
let _a = 17;
} else {
let _a = 17;
}
```
Will only trigger the `IF_SAME_THEN_ELSE` lint and not the `SHARED_CODE_IN_IF_BLOCKS` lint.
---
closes: #5234
changelog: Added a new lint: `branches_sharing_code`
And hello to the one that is writing the changelog for this release :D
Remove author requirement for `cargo_common_metadata`
This PR follows https://github.com/rust-lang/cargo/pull/9282, I'm not fully informed about all of this, it would be great if somebody knowledgeable about this topic agrees.
changelog: Changed `cargo_common_metadata` to stop linting on the optional author field.
* Added expression check for shared_code_in_if_blocks
* Finishing touches for the shared_code_in_if_blocks lint
* Applying PR suggestions
* Update lints yay
* Moved test into subfolder
Fix `redundant_clone` fp
fixes: #5973fixes: #5595fixes: #6998
changelog: Fix `redundant_clone` fp where the cloned value is modified while the clone is in use.
Lint: filter(Option::is_some).map(Option::unwrap)
Fixes#6061
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog:
* add new lint for filter(Option::is_some).map(Option::unwrap)
First Rust PR, so I'm sure I've violated some idioms. Happy to change anything.
I'm getting one test failure locally -- a stderr diff for `compile_test`. I'm having a hard time seeing how I could be causing it, so I'm tentatively opening this in the hopes that it's an artifact of my local setup against `rustc`. Hoping it can at least still be reviewed in the meantime.
I'm gathering that since this is a method lint, and `.filter(...).map(...)` is already checked, the means of implementation needs to be a little different, so I didn't exactly follow the setup boilerplate. My way of checking for method calls seems a little too direct (ie, "is the second element of the expression literally the path for `Option::is_some`?"), but it seems like that's how some other lints work, so I went with it. I'm assuming we're not concerned about, eg, closures that just end up equivalent to `Option::is_some` by eta reduction.
disable upper_case_acronyms for pub items - enum edition
Fixes https://github.com/rust-lang/rust-clippy/issues/6803 (again... 😅 )
My previous fix did not work for enums because enum variants were checked separately in the `check_variant` function but it looks like we can't use that because we can't tell if the enum the variants belong to is declared as public or not (it always said `Inherited` for me)
I went and special-cased enums and iterated over all the variants "manually", but only, if the enums is not public.
---
changelog: fix upper_case_acronyms still firing on public enums (#6803)
Refactor types
r? `@flip1995`
This is the last PR to close#6724🎉
Also, this fixes#6936.
changelog: `vec_box`: Fix FN in `const` or `static`
changelog: `linkedlist`: Fix FN in `const` or `static`
changelog: `option_option`: Fix FN in `const` or `static`
Improve `clone_on_copy`
This also removes the `clone_on_copy_mut` test as the same thing is covered in the `clone_on_copy` test.
changelog: `copy_on_clone` lint on chained method calls taking self by value
changelog: `copy_on_clone` only lint when using the `Clone` trait
changelog: `copy_on_clone` correct suggestion when the cloned value is a macro call.
Lint on `_.clone().method()` when method takes self by value
Set applicability correctly
Correct suggestion when the cloned value is a macro call. e.g. `m!(x).clone()`
Don't lint when not using the `Clone` trait
Improve `expl_impl_clone_on_copy`
fixes: #1254
changelog: Check to see if the generic constraints are the same as if using derive for `expl_impl_clone_on_copy`
`len_without_is_empty` improvements
fixes: #6958fixes: #6972
changelog: Check the return type of `len`. Only integral types, or an `Option` or `Result` wrapping one.
changelog: Ensure the return type of `is_empty` matches. e.g. `Option<usize>` -> `Option<bool>`
Check the return type of `len`. Only integral types, or an `Option` or `Result` wrapping one.
Ensure the return type of `is_empty` matches. e.g. `Option<usize>` -> `Option<bool>`
When the character next to `{}` is "shifted" (when mapping a byte index
in the format string to span) we should avoid shifting the span end
index, so first map the index of `}` to span, then bump the span,
instead of first mapping the next byte index to a span (which causes
bumping the end span too much).
Regression test added.
Fixes#83344
Fix bad suggestion when a reborrow might be required
Fix bad suggestion when the value being sliced is a macro call
Don't lint inside of a macro due to the previous context sensitive changes
search_is_some: add checking for `is_none()`
fixes: #6815
changelog: search_is_some: add checking for `is_none()`.
To be honest I don't know what is the process of renaming the lints. Appreciate any feedback if that needs to be handled differently. Thanks!
Fix bad suggestion for `match_single_binding` lint
Fix a bad suggestion that needs curly braces when the target `match` is the body of an arm.
Fixes#6572
changelog: none
`match_wildcard` improvements
fixes: #6604fixes: #5733fixes: #6862#5733 is only fixed in the normal case, if different paths are used for the variants then the same problem will occur. It's cause by `def_path_str` returning an utterly useless result. I haven't dug into why yet.
For #6604 there should be some discussion before accepting this. It's easy enough to change the message rather than disable the lint for `Option` and `Result`.
changelog: Attempt to find a common path prefix for `match_wildcard_for_single_variants` and `wildcard_enum_match_arm`
changelog: Don't lint op `Option` and `Result` for `match_wildcard_for_single_variants` and `wildcard_enum_match_arm`
changelog: Consider `or` patterns and `Self` prefix for `match_wildcard_for_single_variants` and `wildcard_enum_match_arm`
Don't lint on `Result` and `Option` types.
Considers `or` patterns.
Considers variants prefixed with `Self`
Suggestions will try to find a common prefix rather than just using the full path
Write literal suggestion
fixes: #6768
changelog: Add suggestion to `write_literal` and `print_literal` lints
changelog: Change `use_debug` to point only at the format string
wrong_self_convention: fix lint in case of `to_*_mut` method
fixes#6758
changelog: wrong_self_convention: fix lint in case of `to_*_mut` method. When a method starts with `to_` and ends with `_mut`, clippy expects a `&mut self` parameter, otherwise `&self`.
Any feedback is welcome. I was also thinking if shouldn't we treat `to_` the same way as `as_`. Namely to accept `self` taken: `&self` or `&mut self`.
replace span_lint with span_lint_and_sugg along with error message
fixes: #6874
changelog: none
apologies if this may not be the most idiomatic way of doing it, any advice on changes (if any) would be greatly appreciated.
mem_replace_with_default: recognize some std library ctors
fixes#6562
changelog: mem_replace_with_default: recognize some common constructors equivalent to `Default::default()`
Fix suggestion for `explicit_deref_methods`. Sometimes `&**` is needed, sometimes nothing is needed.
Allow `explicit_deref_methods` to trigger in a few new contexts.
`explicit_deref_methods` will now consider ufcs calls
Fix false positives on procedural macros of `missing_inline_in_public_items` lint
Fixes#6486.
changelog: Fix false positives on procedural macros of `missing_inline_in_public_items` lint.
Fix ICE 6840 - make is_normalizable more strict
fixes#6840
make `is_normalizable` more strict, which should catch this ICE and related cases
changelog: Fix ICE in [`zero_sized_map_values`]
Let Cargo track CLIPPY_ARGS
This PR makes `clippy-driver` emit `CLIPPY_ARGS` in its `dep-info` output.
Just like #6441, this allows this workflow to work:
```shell
cargo clippy # warning: empty `loop {}` wastes CPU cycles
cargo clippy -- -A clippy::empty_loop # no warnings emitted
```
But without rebuilding all dependencies.
cc https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/CLIPPY_ARGS.20is.20not.20tracked.20by.20Cargo/near/228599088
changelog: Cargo now re-runs Clippy if arguments after `--` provided to `cargo clippy` are changed.
Compare empty blocks for equality based on tokens
fixes: #1390
This only considers empty blocks for now, though we should also catch something like this:
```rust
match 0 {
0 => {
do_something();
trace!(0);
0
}
1 => {
do_something();
trace!(1);
1
}
x => x,
}
```
As far as I can tell there aren't any negative effects on other lints. These blocks only happen to be the same for a given compilation, not all compilations.
changelog: Fix `match_on_same_arms` and others. Only consider empty blocks equal if the tokens contained are the same.
Fix `manual_map` false positives
fixes: #6795fixes: #6797fixes: #6811fixes: #6819
changelog: Fix false positives for `manual_map` when `return`, `break`, `continue`, `yield`, `await`, and partially moved values are used.
changelog: Don't expand macros in suggestions for `manual_map`
lint message should not start with uppercase letters
lint messages should not have punctuation at the end of the last line
https://rustc-dev-guide.rust-lang.org/diagnostics.html#diagnostic-structure
The test reads through all the .stderr files in the testsuit and checks lint messages that start with "help: ", "error: " etc.
There is also an exception list for special messages that are deemed acceptable.
changelog: make sure lint messages conform with the rustc dev guide and add test
Fix false positive for unit_arg lint
Fixes#6447
To avoid false positives don't complain about unit args when they come from a path expression, e.g. a local variable.
**Note:** This is my first contribution to Clippy, so I might have messed up somewhere. Any feedback is welcome and I'm happy to work out any kinks.
---
changelog: Do not lint unit arguments when they come from a path expression.
or_fun_call: fix suggestion for `or_insert(vec![])`
fixes#6748
changelog: or_fun_call: fix suggestion for `or_insert(vec![])` on `std::collections::hash_map::Entry` or `std::collections::btree_map::Entry`
Applies for `std::collections::hash_map::Entry` and `std::collections::btree_map::Entry`
Example:
Previously, for the following code:
`let _ = hash_map.entry("test".to_owned()).or_insert(vec![]);`
clippy would suggest to use:
`or_insert_with(vec![])`, which causes a compiler error (E0277).
Now clippy suggests:
`or_insert_with(Vec::new)`
move upper_case_acronyms back to style, but make the default behaviour less aggressive by default (can be unleashed via config option)
Previous discussion in the bi-weekly clippy meeting for reference: https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/Meeting.202021-02-23/near/227458019
Move the `upper_case_acronyms` lint back to the style group.
Only warn on fully-capitalized names by default.
Add add a clippy-config option `upper-case-acronyms-aggressive: true/false` to enabled more aggressive linting on
all substrings that could be capitalized acronyms.
---
changelog: reenable upper_case_acronyms by default but make the more aggressive linting opt-in via config option
Inconsistent struct constructor
fixes: #6352
r? `@matthiaskrgr`
I added the lint that checks for the struct constructors where the order of the field init shorthands is inconsistent with that in the struct definition.
changelog: Add style lint: `inconsistent_struct_constructor`
Fix FP in inherent_to_string when the function has generic parameters
Minimal example of the false positive:
````
struct G;
impl G {
fn to_string<const _N: usize>(&self) -> String {
"G.to_string()".to_string()
}
}
fn main() {
let g = G;
g.to_string::<1>();
}
````
Clippy emits an `inherent_to_string` warning, and suggests that we implement `Display` for `G` instead. However, this is not possible, since the generic parameter _N only exists in this function, not in `G` itself. This particular example uses const generics, which is where the issue is most likely to come up, but this PR skips the lint if the `to_string` function has any kind of generic parameters.
changelog: Fix FP in `inherent_to_string`
Teach SpanlessEq binding IDs
changelog: Fix collapsible_match false positive
Fixes#6740
This PR changes the way `SpanlessEq` determines whether two local variables are the same. Instead of checking that the names match, it checks that the `HirId`s match. If local bindings are declared within the expressions that are being compared, `SpanlessEq` will remember bindings that correspond to each other in a `FxHashMap<HirId, HirId>`. This makes `SpanlessEq` more flexible while also fixing false positives.
Example: `{ let x = 1; x + 2 }` is equal to `{ let y = 1; y + 2 }`.
CC `@xFrednet` I think this will resolve some concerns in #6463
Add the from_str_radix_10 lint
changelog: added the new `from_str_radix_10` which sometimes replaces calls to `primitive::from_str_radix` to `str::parse`
This is ready to be merged, although maybe the category should be `pedantic` instead of `style`? I'm not sure where it fits better.
Closes#6713.
Fix for issue 6640
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: unnecessary_wraps will now suggest to remove unnecessary wrapped return unit type, like Option<()>
fixes#6640
New lint: default_numeric_fallback
fixes#6064
r? `@flip1995`
As we discussed in [here](https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/Issue.20.236064/near/224647188) and [here](https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/Issue.20clippy.236064/near/224746333), I start implementing this lint from the strictest version.
In this PR, I'll allow the below two cases to pass the lint to reduce FPs.
1. Appearances of unsuffixed numeric literals in `Local` if `Local` has a type annotation, for example:
```rust
// Good.
let x: i32 = 1;
// Also good.
let x: (i32, i32) = if cond {
(1, 2)
} else {
(2, 3)
};
```
2. Appearances of unsuffixed numeric literals in args of `Call` or `MethodCall` if corresponding arguments of their signature have concrete types, for example:
```rust
fn foo_mono(x: i32) -> i32 {
x
}
fn foo_poly<T>(t: T) -> t {
t
}
// Good.
let x = foo_mono(13);
// Still bad.
let x: i32 = foo_poly(13);
```
changelog: Added restriction lint: `default_numeric_fallback`
These updates allow us to specify multiple testnames for `TESTNAME`.
The new version of compiletest-rs also includes `bless` support, but is
not enabled with this PR.
Do not lint when the closure is called using an iterator
Fix FP when the closure is used in an iterator for `blocks_in_if_conditions` lint
FIxes: #1141
changelog: none
Rework use_self impl based on ty::Ty comparison #3410 | Take 2
This builds on top of #5531
I already reviewed and approved the commits by `@montrivo.` So only the review of my commits should be necessary.
I would also appreciate your review `@montrivo,` since you are familiar with the challenges here.
Fixes#3410 and Fixes#4143 (same problem)
Fixes#2843Fixes#3859Fixes#4734 and fixes#6221Fixes#4305Fixes#5078 (even at expression level now 🎉)
Fixes#3881 and Fixes#4887 (same problem)
Fixes#3909
Not yet: #4140 (test added)
All the credit for the fixes goes to `@montrivo.` I only refactored and copy and pasted his code.
changelog: rewrite [`use_self`] lint and fix multiple (8) FPs. One to go.
Fix suggestions that need parens in `from_iter_instead_of_collect` lint
Fixes broken suggestions that need parens (i.e.: range)
Fixes: #6648
changelog: none
