Add `format_in_format_args` and `to_string_in_format_args` lints
Fixes#7667 and #7729
I put these in `perf` since that was one of `@jplatte's` suggestions, and `redundant_clone` (which I consider to be similar) lives there as well.
However, I am open to changing the category or anything else.
r? `@camsteffen`
changelog: Add `format_in_format_args` and `to_string_in_format_args` lints
Do not expand macros in equatable_if_let suggestion
Fixes#7781
Let's use Hacktoberfest as a motivation to start contributing PRs myself again :)
changelog: [`equatable_if_let`]: No longer expands macros in the suggestion
Fix FP in external macros for `mut_mut` lint
Fix FP in `mut_mut` lint when type is defined in external macros.
fixes: #6922
changelog: [`mut_mut`] Fix FP when type is defined in external macros
Refactor `clippy::match_ref_pats` to check for multiple reference patterns
fixes#7740
When there is only one pattern, to begin with, i.e. a single deref(`&`), then in such cases we suppress `clippy::match_ref_pats`.
This is done by checking the count of the reference pattern and emitting `clippy::match_ref_pats` when more than one pattern is present.
Removed certain errors in the `stderr` tests as they would not be triggered.
changelog: Refactor `clippy::match_ref_pats` to check for multiple reference patterns
Before this lint didn't trigger on macros. With rust-lang/rust#88175
this isn't enough anymore. In this PR a `WhileLoop` desugaring kind was
introduced. This overrides the span of expanded expressions when
lowering the while loop. So if a while loop is in a macro, the
expressions that it expands to are no longer marked with
`ExpnKind::Macro`, but with `ExpnKind::Desugaring`. In general, this is
the correct behavior and the same that is done for `ForLoop`s. It just
tripped up this lint.
Restriction lint for function pointer casts
The existing lints for function pointer casts cover the cases where a cast is non-portable or would result in truncation, however there's currently no way to forbid numeric function pointer casts entirely.
I've added a new lint `fn_to_numeric_cast_any`, which allows one to ban _all_ numeric function pointer casts, including to `usize`. This is useful if you're writing high-level Rust and want to opt-out of potentially surprising behaviour, avoiding silent bugs from forgotten parentheses, e.g.
```rust
fn foo() -> u32 {
10
}
fn main() {
let _ = foo as usize; // oops, forgot to call foo and got a random address instead!
}
```
~~I'm open to suggestions for the naming of the lint, because `fn_to_numeric_cast_any` is a bit clunky. Ideally I'd call this lint `fn_to_numeric_cast`, but that name is already taken for the more specific lint~~. We've stuck with `fn_to_numeric_cast_any` to avoid renaming the existing lint, or choosing a different name that's too generic (like `fn_cast`).
I'm also open to changing the suggestion behaviour, as adding parentheses is only one of many possible ways to fix the lint.
changelog: add ``[`fn_to_numeric_cast_any`]`` restriction lint
Make `shadow_reuse` suggestion less verbose
Closes#7764
Make `shadow_reuse` suggestion less verbose.
changelog: [`shadow_reuse`] does not warn shadowing statement
make test module detection more strict
I started with some small improvements to clippy_utils/src/lib.rs, but then found that our "test" module detection would also catch words containing "test" like e.g. "attestation". So I made this a bit more strict (splitting by `'_'` and checking for `test` or `tests`), adding a test case as I went.
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*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: none
