lint nested patterns and slice patterns in `needless_borrowed_reference`
Now lints in positions other than top level, e.g. `Some(&ref a)`. Or patterns are excluded as that can cause issues
Slice patterns of `ref`s are now linted, e.g. `&[ref a, ref b]`. An easy one to walk into as you might expect that to match against a slice you should use `&[]`, then to get around a `cannot move out of type [T]` error you apply a `ref`
changelog: [`needless_borrowed_reference`]: lint nested patterns and slice patterns
Fix sorting in ` cargo dev update_lints` script
changelog: none
The old code cloned and sorted `usable_lints` into `sorted_usable_lints`, but then failed to do anything with `sorted_usable_lints`.
This was discovered by my new `collection_is_never_read` lint (#9267) that I'm working on!
Fix: I renamed the sorted vector to `usable_lints`. Therefore it now gets used where the unsorted one was used previously.
Implement `manual_clamp` lint
Fixes#9477Fixes#6751
Identifies common patterns where usage of the `clamp` function would be more succinct and clear, and suggests using the `clamp` function instead.
changelog: [`manual_clamp`]: Implement manual_clamp lint
avoid doc-link-with-quotes in code blocks
This fixes#8961 by moving the lint into the docs code, thus being able to re-use the pulldown-cmark parser and simplifying the code.
---
changelog: none
rustc_tool_utils: bump version in anticipation of a new release
cc https://github.com/rust-lang/rust-clippy/issues/9553
After this is merged, I will publish the 0.2.1 version to crates.io, and make another PR that switches clippy to use the dependency from crates.io.
The source can still be kept in the clippy repo though imo.
This will allow miri and clippy to "share" the crate in the rustc repo once they both depend on it.
reopen of #9561
changelog: release `rustc_tools_util` on `Crates.io`.
doc: make the usage of clippy.toml more clear
Added a subsection for it, and move it after `Allowing/denying lints` which is more frequently used.
fix https://github.com/rust-lang/rust-clippy/issues/9265
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: none
[`unnecessary_lazy_evaluations`] Do not suggest switching to early evaluation when type has custom `Drop`
fix#9427
changelog: [`unnecessary_lazy_evaluations`] Do not suggest switching to early evaluation when type has custom `Drop`
fix [`needless_borrow`], [`explicit_auto_deref`] FPs on unions
fix https://github.com/rust-lang/rust-clippy/issues/9383
changelog: fix [`needless_borrow`] false positive on unions
changelog: fix [`explicit_auto_deref`] false positive on unions
Left a couple debug derived impls on purpose I needed to debug as I don't think it's noise
Don't lint unstable moves in `std_instead_of_core`
Fixes#9515
changelog: [`std_instead_of_core`]: No longer suggests unstable modules such as `core::error`
add `box-default` lint
This adds a `box-default` lint to suggest using `Box::default()` instead of `Box::new(Default::default())`, which offers less moving parts and potentially better performance according to [the perf book](https://nnethercote.github.io/perf-book/standard-library-types.html#box).
---
changelog: add [`box_default`] lint
[`needless_return`] Recursively remove unneeded semicolons
fix#8336,
fix#8156,
fix https://github.com/rust-lang/rust-clippy/issues/7358,
fix#9192,
fix https://github.com/rust-lang/rust-clippy/issues/9503
changelog: [`needless_return`] Recursively remove unneeded semicolons
For now the suggestion about removing the semicolons are hidden because they would be very noisy and should be obvious if the user wants to apply the lint manually instead of using `--fix`. This could be an issue for beginner, but haven't found better way to display it.
[arithmetic-side-effects] Consider references
Takes into consideration integer references like `&i32::MAX` because currently things like `let _ = &1 + 0` trigger the lint.
changelog: FP: [`arithmetic_side_effects`]: Now ignores references
[9507](https://github.com/rust-lang/rust-clippy/pull/9507)
Don't lint `*_interior_mutable_const` on unions due to potential ICE.
fixes#9445
cc rust-lang/rust#101113
This started ICE'ing sometime last month due to stricter UB checks. I'm not sure how we could check the value of a union as MIRI doesn't seem to store which field is currently active.
changelog: Don't ICE on const unions containing a `!Freeze` type.
Silence [`question_mark`] in const context
fix https://github.com/rust-lang/rust-clippy/issues/9175
When `const_try` is stabilised can be turned into a MSRV
changelog: Silence [`question_mark`] in const context
new uninlined_format_args lint to inline explicit arguments
Implement https://github.com/rust-lang/rust-clippy/issues/8368 - a new lint to inline format arguments such as `print!("{}", var)` into `print!("{var}")`.
### Supported cases
code | suggestion | comment
---|---|---
`print!("{}", var)` | `print!("{var}")` | simple variables
`print!("{0}", var)` | `print!("{var}")` | positional variables
`print!("{v}", v=var)` | `print!("{var}")` | named variables
`print!("{0} {0}", var)` | `print!("{var} {var}")` | aliased variables
`print!("{0:1$}", var, width)` | `print!("{var:width$}")` | width support
`print!("{0:.1$}", var, prec)` | `print!("{var:.prec$}")` | precision support
`print!("{:.*}", prec, var)` | `print!("{var:.prec$}")` | asterisk support
### Known Problems
* There may be a false positive if the format string is wrapped in a macro call:
```rust
# let var = 42;
macro_rules! no_param_str { () => { "{}" }; }
macro_rules! pass_through { ($expr:expr) => { $expr }; }
println!(no_param_str!(), var);
println!(pass_through!("{}"), var);
```
* Format string uses an indexed argument that cannot be inlined.
Supporting this case requires re-indexing of the format string.
Until implemented, `print!("{0}={1}", var, 1+2)` should be changed to `print!("{var}={0}", 1+2)` by hand.
changelog: [`uninlined_format_args`]: A new lint to inline format arguments, i.e. `print!("{}", var)` into `print!("{var}")`
