ignore `redundant_pub_crate` in `useless_attribute`
changelog: [`useless_attribute`] no longer lints [`redundant_pub_crate`]
As mentioned in https://github.com/rust-lang/rust-clippy/issues/8732#issuecomment-1106489634
> And it turns out I can't even explicitly allow it at the usage site, because then `clippy::useless_attribute` fires (which would also be a FP?), which is deny-by-default.
>
> Though it does work if I then allow `clippy::useless_attribute`. 😂
>
> ```rust
> #[allow(clippy::useless_attribute)]
> #[allow(clippy::redundant_pub_crate)]
> pub(crate) use bit;
> ```
>
> The originally-reported warning now no longer occurs.
`needless_late_init`: ignore `if let`, `let mut` and significant drops
No longer lints `if let`, personal taste on this one is pretty split, so it probably shouldn't be warning by default. Fixes#8613
```rust
let x = if let Some(n) = y {
n
} else {
1
}
```
No longer lints `let mut`, things like the following are not uncommon and look fine as they are
b169c16d86/src/sixty_four.rs (L88-L93)
Avoids changing the drop order in an observable way, where the type of `x` has a drop with side effects and something between `x` and the first use also does, e.g.
48cc6cb791/tests/test_api.rs (L159-L167)
The implementation of `type_needs_ordered_drop_inner` was changed a bit, it now uses `Ty::has_significant_drop` and reordered the ifs to check diagnostic name before checking the implicit drop impl
changelog: [`needless_late_init`]: No longer lints `if let` statements, `let mut` bindings and no longer significantly changes drop order
mistyped_literal_suffix: improve integer suggestions, avoid wrong float suggestions
This PR fixes 2 things:
- The known problem that integer types are always suggested as signed, by suggesting an unsigned suffix for literals that wouldnt fit in the signed type, and ignores any literals too big for the corresponding unsigned type too.
- The lint would only look at the integer part of any floating point literals without an exponent, this causing #6129. This just ignores those literals.
Examples:
```rust
let _ = 2_32; // still 2_i32
let _ = 234_8; // would now suggest 234_u8
// these are now ignored
let _ = 500_8;
let _ = 123_32.123;
```
changelog: suggest correct integer types in [`mistyped_literal_suffix`], ignore float literals without an exponent
fixes#6129
Previously this lint would only look at the integer part of floating
point literals without an exponent, giving wrong suggestions like:
```
|
8 | let _ = 123_32.123;
| ^^^^^^^^^^ help: did you mean to write: `123.123_f32`
|
```
Instead, it now ignores these literals.
Fixes#6129
Instead of just always suggesting signed suffixes regardless of size
of the value, it now suggests an unsigned suffix when the value wouldn't
fit into the corresponding signed type, and ignores the literal entirely
if it is too big for the unsigned type as well.
wrong_self_convention allows `is_*` to take `&mut self`
fix#8480 and #8513
Allowing `is_*` to take `&self` or none is too restrictive.
changelog: FPs: [`wrong_self_convention`] now allows `&mut self` and no self as arguments for `is_*` methods
`manual_split_once`: lint manual iteration of `SplitN`
changelog: `manual_split_once`: lint manual iteration of `SplitN`
Now lints:
```rust
let mut iter = "a.b.c".splitn(2, '.');
let first = iter.next().unwrap();
let second = iter.next().unwrap();
let mut iter = "a.b.c".splitn(2, '.');
let first = iter.next()?;
let second = iter.next()?;
let mut iter = "a.b.c".rsplitn(2, '.');
let first = iter.next().unwrap();
let second = iter.next().unwrap();
let mut iter = "a.b.c".rsplitn(2, '.');
let first = iter.next()?;
let second = iter.next()?;
```
It suggests (minus leftover whitespace):
```rust
let (first, second) = "a.b.c".split_once('.').unwrap();
let (first, second) = "a.b.c".split_once('.')?;
let (second, first) = "a.b.c".rsplit_once('.').unwrap();
let (second, first) = "a.b.c".rsplit_once('.')?;
```
Currently only lints if the statements are next to each other, as detecting the various kinds of shadowing was tricky, so the following won't lint
```rust
let mut iter = "a.b.c".splitn(2, '.');
let something_else = 1;
let first = iter.next()?;
let second = iter.next()?;
```
Less authoritative stable_sort_primitive message
fixes#8241
Hey all - first contribution here so I'm deciding to start with something small.
Updated the linked message to be less authoritative as well as moved the lint grouping from `perf` to `pedantic` as suggested by `@camsteffen` under the issue.
changelog: [`stable_sort_primitive`]: emit less authoritative message and move to `pedantic`
Fix needless_match false positive for if-let when the else block doesn't match to given expr
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fix#8695
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: Fixed ``[`needless_match`]`` false positive when else block expression differs.
Take over: New lint bytes count to len
take over #8375close#8083
This PR adds new lint about considering replacing `.bytes().count()` with `.len()`.
Thank you in advance.
---
r! `@Manishearth`
changelog: adds new lint [`bytes_count_to_len`] to consider replacing `.bytes().count()` with `.len()`
adding test patterns
cargo dev bless
fix comment
add ;
delete :
fix suggestion code
and update stderr in tests.
use match_def_path when checking method name
New lint `format_add_strings`
Closes#6261
changelog: Added [`format_add_string`]: recommend using `write!` instead of appending the result of `format!`
Add `usize` cast to `clippy::manual_bits` suggestion
A fix for the suggestion from https://github.com/rust-lang/rust-clippy/pull/8213
changelog: [`manual_bits`]: The suggestion now includes a cast for proper type conversion
This adds test to make sure correct behavior of lint
- The first test's option variable is not a temporary variable
- The second test does not make usage of `take()`
- The third test makes usage of `take()` and uses a temporary variable
This lint checks if Option::take() is used on a temporary value (a value
that is not of type &mut Option and that is not a Place expression) to
suggest omitting take()
Check for loops/closures in `local_used_after_expr`
Follow up to #8646, catches when a local is used multiple times because it's in a loop or a closure
changelog: none
fix unnecessary_to_owned about msrv
This PR fixes ``[`unnecessary_owned`]``.
## What
```rust
# sample code
fn _msrv_1_35() {
#![clippy::msrv = "1.35"]
let _ = &["x"][..].to_vec().into_iter();
}
fn _msrv_1_36() {
#![clippy::msrv = "1.36"]
let _ = &["x"][..].to_vec().into_iter();
}
```
If we will check this code using clippy, ``[`unnecessary_owned`]`` will modify the code as follows.
```rust
error: unnecessary use of `to_vec`
--> $DIR/unnecessary_to_owned.rs:219:14
|
LL | let _ = &["x"][..].to_vec().into_iter();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `["x"][..].iter().copied()`
error: unnecessary use of `to_vec`
--> $DIR/unnecessary_to_owned.rs:224:14
|
LL | let _ = &["x"][..].to_vec().into_iter();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `["x"][..].iter().copied()`
```
This is incorrect. Because `Iterator::copied` was estabilished in 1.36.
## Why
This bug was caused by not separating "copied" and "clone" by reference to msrv.
89ee6aa6e3/clippy_lints/src/methods/unnecessary_to_owned.rs (L195)
So, I added a conditional branch and described the corresponding test.
Thank you in advance.
changelog: fix wrong suggestions about msrv in [`unnecessary_to_owned`]
r! `@giraffate`
Don't lint `manual_non_exhaustive` when the enum variant is used
fixes#5714
changelog: Don't lint `manual_non_exhaustive` when the enum variant is used
Do not trigger ``[`rest_pat_in_fully_bound_structs`]`` on `#[non_exhaustive]` structs
fixes#8029
Just adds an additional check to ensure that the`ty::VariantDef` is not marked as `#[non_exhaustive]`.
changelog: Do not apply ``[`rest_pat_in_fully_bound_structs`]`` on structs marked as non exhaustive.
