Add `needless_pass_by_ref_mut` lint
changelog: [`needless_pass_by_ref_mut`]: This PR add a new lint `needless_pass_by_ref_mut` which emits a warning in case a `&mut` function argument isn't used mutably. It doesn't warn on trait and trait impls functions.
Fixes#8863.
New lint [`manual_partial_ord_and_ord_impl`]
Lints when both `PartialOrd` and `Ord` are manually implemented yet the body of `PartialOrd::partial_cmp` isn't `Some(self.cmp(<other>))`.
This is in `correctness` currently but I'm ok with elsewhere.
Closes#10744
---
changelog: new lint [`needless_partial_ord_impl`]
[#10788](https://github.com/rust-lang/rust-clippy/pull/10788)
cargo dev fmt
cargo test passes
cargo test passes
refactor a lil
Update bool_comparison.stderr
heavily refactor + bump `clippy::version`
refactor
refactor
check bounds to increase accuracy, and add todos
Rename `adjustment::PointerCast` and variants using it to `PointerCoercion`
It makes it sounds like the `ExprKind` and `Rvalue` are supposed to represent all pointer related casts, when in reality their just used to share a little enum variants. Make it clear there these are only coercions and that people who see this and think "why are so many pointer related casts not in these variants" aren't insane.
This enum was added in #59987. I'm not sure whether the variant sharing is actually worth it, but this at least makes it less confusing.
r? oli-obk
Fix changelog PR listings, create them automatically in `fetch_prs_between.sh`
changelog: none
`fetch_prs_between.sh` now finds the date of the newest and oldest merges from GitHub to use in the range, this does add a dependency on https://github.com/cli/cli
It also no longer prints rollups/merges that come from rustc, so only clippy changes should be printed
r? `@xFrednet`
cc #10847
Pass correct substs to `implements_trait` in `incorrect_impls`
`Copy<T>` does in fact not exist. The substs on the trait_ref contain the `Self` type of the impl as the first parameter, so passing that to `implements_trait`, which then nicely prepends the `Self` type for us does not end will.
fixes #11121
The assertions requires debug assertions inside rustc, which is probably why it didn't fire here. I tested the change locally in rust-lang/rust and it did not ICE anymore.
cc `@xFrednet` `@Centri3`
changelog: [`incorrect_impls`]: fix confusion about generic parameters
`Copy<T>` does in fact not exist. The substs on the trait_ref contain
the `Self` type of the impl as the first parameter, so passing that
to `implements_trait`, which then nicely prepends the `Self` type
for us does not end will.
It makes it sound like the `ExprKind` and `Rvalue` are supposed to represent all pointer related
casts, when in reality their just used to share a some enum variants. Make it clear there these
are only coercion to make it clear why only some pointer related "casts" are in the enum.
Fix regex lints for regex 1.9.0
regex 1.9.0 was [just released](https://blog.burntsushi.net/regex-internals/), which changes where the types are defined. Instead of updating the definitions to the ones in 1.9.0 this PR uses [`def_path_def_ids`](https://doc.rust-lang.org/nightly/nightly-rustc/clippy_utils/fn.def_path_def_ids.html) on the canonical paths so that we don't have to worry about third party crate internals
This means that it still works with older regex versions too, and will for any future layout changes. I tested it with 1.8.4 and 1.9.0
changelog: [`INVALID_REGEX`], [`TRIVIAL_REGEX`]: now works with regex 1.9.0
Move `TyCtxt::mk_x` to `Ty::new_x` where applicable
Part of rust-lang/compiler-team#616
turns out there's a lot of places we construct `Ty` this is a ridiculously huge PR :S
r? `@oli-obk`
Specialize `try_destructure_mir_constant` for its sole user (pretty printing)
We can't remove the query, as we need to invoke it from rustc_middle, but can only implement it in mir interpretation/const eval.
r? `@RalfJung` for a first round.
While we could move all the logic into pretty printing, that would end up duplicating a bit of code with const eval, which doesn't seem great either.
new lint: `read_line_without_trim`
This adds a new lint that checks for calls to `Stdin::read_line` with a reference to a string that is then attempted to parse into an integer type without first trimming it, which is always going to fail at runtime.
This is something that I've seen happen a lot to beginners, because it's easy to run into when following the example of chapter 2 in the book where it shows how to program a guessing game.
It would be nice if we could point beginners to clippy and tell them "let's see what clippy has to say" and have clippy explain to them why it fails 👀
I think this lint can later be "generalized" to work not just for `Stdin` but also any `BufRead` (which seems to be where the guarantee about the trailing newline comes from) and also, matching/comparing it to a string slice that doesn't end in a newline character (e.g. `input == "foo"` is always going to fail)
changelog: new lint: [`read_line_without_trim`]
[`useless_vec`]: add more tests and don't lint inside of macros
Closes#11084.
I realized that the fix I added in #11081 itself also causes an error in a suggestion when inside of a macro. Example:
```rs
macro_rules! x {
() => {
for _ in vec![1, 2] {}
}
}
x!();
```
Here it would suggest replacing `vec![1, 2]` with `[x!()]`, because that's what the source callsite is (reminder: it does this to get the correct span of `x!()` for code like `for _ in vec![x!()]`), but that's wrong when *inside* macros, so I decided to make it not lint if the whole loop construct is inside a macro to avoid this issue.
changelog: [`useless_vec`]: add more tests and don't lint inside of macros
r? `@Alexendoo` since these were your tests, I figured it makes most sense to assign you
Don't lint manual_let_else in cases where ? would work
Don't lint `manual_let_else` where the question mark operator `?` would be sufficient, that is, mostly in cases like:
```Rust
let v = if let Some(v) = ex { v } else { return None };
```
Also, this PR emits the `question_mark` lint for `let...else` patterns that could be written with `?` (also, only `return None` like cases).
```
changelog: [`manual_let_else`]: don't lint in cases where question_mark already lints
changelog: [`question_mark`]: lint for `let Some(...) = ex else { return None };`
```
Fixes #8755
