Our lint deprecation previously didn't work for tool lints, because
`register_removed` was registering lints to be removed _without_ the
`clippy` prefix.
new_ret_no_self: allow Self in inner type for impl Trait return types
Check the inner types of associated types of a trait when checking for Self in the return type of a `new` method. This means that the following will no longer warn:
```rust
trait Trait {
type Inner;
}
struct S;
impl S {
fn new() -> impl Trait<Inner = Option<Self>> {
struct TraitImpl;
impl Trait for TraitImpl {
type Inner = Option<S>;
}
TraitImpl
}
}
```
```rust
#![feature(async_await)]
struct Connection;
impl Connection {
async fn new() -> Result<Self, ()> {
Ok(S)
}
}
```
closes#4359
changelog: fix `new_ret_no_self` lint for async `new` functions.
Don't emit enum_variant_names if remainder starts with a numeric
changelog: Fix false positive in `pub_enum_variant_names` and `enum_variant_names`
As [per the reference](https://doc.rust-lang.org/reference/identifiers.html), identifiers must start with a letter. So we don't suggest a better
variant naming in case the remainder would start with a numeric.
Fixes#739
Add negation to `len_zero` lint to show more explicit message.
Fixes#4304 I have updated the `len_zero` to show the required negation in case of like the below case.
```
fn main() {
let v = vec![1];
if v.len() > 0 {
}
}
```
changelog: Clarify suggestion of `len_zero` lint.
Fix `for on` typo
<!--
Thank you for making Clippy better!
We're collecting our changelog from pull request descriptions.
If your PR only updates to the latest nightly, you can leave the
`changelog` entry as `none`. Otherwise, please write a short comment
explaining your change.
If your PR fixes an issue, you can add "fixes #issue_number" into this
PR description. This way the issue will be automatically closed when
your PR is merged.
If you added a new lint, here's a checklist for things that will be
checked during review or continuous integration.
- [ ] Followed [lint naming conventions][lint_naming]
- [ ] Added passing UI tests (including committed `.stderr` file)
- [ ] `cargo test` passes locally
- [ ] Executed `util/dev update_lints`
- [ ] Added lint documentation
- [ ] Run `cargo fmt`
Note that you can skip the above if you are just opening a WIP PR in
order to get feedback.
Delete this line and everything above before opening your PR -->
closes#4317
changelog: minor typo fix
Mark `fn_to_numeric_cast` lints as MaybeIncorrect
At least for now so that `cargo fix --clippy` is not causing problems
with this lint. See #3896 for the remaining problems with the suggestions of this lint.
changelog: none
cc #3630, #3896
trait bounds lint - repeated types
This PR is to tackle https://github.com/rust-lang/rust-clippy/issues/3764 it's still a WIP and doesn't work but this is an initial stab. It builds though I haven't added any tests as I'm not sure where lint tests should go?
Unfortunately, it seems id isn't tied to the type itself but I guess where it is in the AST? Looking at https://manishearth.github.io/rust-internals-docs/syntax/ast/struct.Ty.html I can't see any members that would let me tell if a type was repeated in multiple trait bounds.
There may be other issues with how I've implemented this so any assistance is appreciated!
changelog: Add new lint: `type_repetition_in_bounds`
This lint adds warning if types are redundantly repeated in trait bounds i.e. `T: Copy, T: Clone` instead of `T: Copy + Clone`. This is a late pass trait lint and has necessitated the addition of code to allow hashing of TyKinds without taking into account Span information.
Ignore generated fresh lifetimes in elision check
<!--
Thank you for making Clippy better!
We're collecting our changelog from pull request descriptions.
If your PR only updates to the latest nightly, you can leave the
`changelog` entry as `none`. Otherwise, please write a short comment
explaining your change.
If your PR fixes an issue, you can add "fixes #issue_number" into this
PR description. This way the issue will be automatically closed when
your PR is merged.
If you added a new lint, here's a checklist for things that will be
checked during review or continuous integration.
- [ ] Followed [lint naming conventions][lint_naming]
- [ ] Added passing UI tests (including committed `.stderr` file)
- [ ] `cargo test` passes locally
- [ ] Executed `util/dev update_lints`
- [ ] Added lint documentation
- [ ] Run `cargo fmt`
Note that you can skip the above if you are just opening a WIP PR in
order to get feedback.
Delete this line and everything above before opening your PR -->
fixes#3988
changelog: Ignore generated fresh lifetimes in elision check.
**HELP**: It seems `tests/ui` are compiled under edition 2015, and I don't know how to add tests for this properly.
Here is the test input it had already passed:
```rust
#![feature(async_await)]
#![allow(dead_code)]
async fn sink1<'a>(_: &'a str) {} // lint
async fn sink1_elided(_: &str) {} // ok
async fn one_to_one<'a>(s: &'a str) -> &'a str { s } // lint
async fn one_to_one_elided(s: &str) -> &str { s } // ok
async fn all_to_one<'a>(a: &'a str, _b: &'a str) -> &'a str { a } // ok
// async fn unrelated(_: &str, _: &str) {} // Not allowed in async fn
// #3988
struct Foo;
impl Foo {
pub async fn foo(&mut self) {} // ok
}
// rust-lang/rust#61115
async fn print(s: &str) { // ok
println!("{}", s);
}
fn main() {}
```
false positives fixes of `implicit_return`
- Handle returning macro statements properly (remove "this error originates in a macro outside of the current crate")
- Handle functions that return never type
- Handle functions that panic but do not return never type
changelog: Fix false positives in `implicit_return` lint pertaining to macros and panics
Fix bug in `implicit_hasher` causing crashes
Skip linting if the type is from an external macro. Closes#4260.
changelog: Fix bug in `implicit_hasher` causing crashes
Improve cast_ptr_alignment lint
<!--
Thank you for making Clippy better!
We're collecting our changelog from pull request descriptions.
If your PR only updates to the latest nightly, you can leave the
`changelog` entry as `none`. Otherwise, please write a short comment
explaining your change.
If your PR fixes an issue, you can add "fixes #issue_number" into this
PR description. This way the issue will be automatically closed when
your PR is merged.
If you added a new lint, here's a checklist for things that will be
checked during review or continuous integration.
- [x] Followed [lint naming conventions][lint_naming]
- [x] Added passing UI tests (including committed `.stderr` file)
- [x] `cargo test` passes locally
- [x] Executed `util/dev update_lints`
- [x] Added lint documentation
- [x] Run `cargo fmt`
Note that you can skip the above if you are just opening a WIP PR in
order to get feedback.
Delete this line and everything above before opening your PR -->
* print alignment in bytes in the lint message
* ignore ZST left-hand types
Fixes#3797 and #4256
changelog:
* `cast_ptr_alignment`: Print alignment in bytes in the lint message
* `cast_ptr_alignment`: Ignore casting from ZST left-hand types
