closes#8177
previously, `needless_return` suggests an empty block `{}` to replace void `return` on match arms, this PR improve the suggestion by suggesting a unit instead.
changelog: `needless_return` suggests `()` instead of `{}` on match arms
cache test item names
This avoids quadratic behavior (collecting all test item names for each `eq_op` instance within the module). However, it invests a good deal of memory to buy this speedup. If that becomes a problem, I may need to change the cache to only store the chain of last visited modules.
This hopefully fixes#8171.
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changelog: none
Readme: note that config changes don't apply to already compiled code
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: added a note to the Readme that config changes don't apply to already compiled code
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: added a note to the Readme that config changes don't apply to already compiled code
fix an ICE on unwrapping a None
This very likely fixes#8166 though I wasn't able to meaningfully reduce a test case. This line is the only call to `unwrap` within that function, which was the one in the stack trace that triggered the ICE, so I think we'll be OK.
`@hackmad` can you pull and build this branch and check if it indeed fixes your problem?
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changelog: Fixed ICE in [`unnecessary_cast`]
fix [`shadow_reuse`] false negative for if let bindings
fixes#8087
changelog: trigger [`shadow_reuse`] instead of [`shadow_unrelated`] on shadowed `if let` bindings
Improve `unwrap_or_else_default` when handling `unwrap_or_else(XXX::new)`
changelog: change `unwrap_or_else_default` to work with std constructors like `Vec::new`, `HashSet::new`, `HashMap::new`.
Notes:
- Code to handle detecting those constructors is already there. I moved it out to `is_default_equivalent_call`
Add suggestion for neg_multiply lint
This fixes#8115 by adding a suggestion for [neg_multiply].
My first issue on Github, any feedback or input is welcome 😃
changelog: create a suggestion for `neg_multiply`
Test clippy_utils in CI
r? `@xFrednet` Since you did the last refactor of the `str_utils` functions in #7873
changelog: Make sure tests in `clippy_utils` are passing by testing it in CI
This makes sure that the tests in clippy_utils are run in CI.
When looking into this I discovered that two tests were failing and
multiple doc tests were failing. This fixes those tests and enables a
few more doc tests.
Fix `SAFETY` comment tag casing in undocumented_unsafe_blocks
This changes the lint introduced in #7748 to suggest adding a `SAFETY` comment instead of a `Safety` comment.
Searching for `// Safety:` in rust-lang/rust yields 67 results while `// SAFETY:` yields 1072.
I think it's safe to say that this comment tag is written in upper case, just like `TODO`, `FIXME` and so on are. As such I would expect this lint to follow the official convention as well.
Note that I intentionally introduced some casing diversity in `tests/ui/undocumented_unsafe_blocks.rs` to test more cases than just `Safety:`.
changelog: Capitalize `SAFETY` comment in [`undocumented_unsafe_blocks`]
Don't emit RETURN_SELF_NOT_MUST_USE lint if `Self` already is marked as `#[must_use]`
New bug discovered with this lint. Hopefully, this is the last one.
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changelog: none
Ensure that RETURN_SELF_NOT_MUST_USE is not emitted if the method already has `#[must_use]`
Fixes https://github.com/rust-lang/rust-clippy/issues/8140.
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Edit:
changelog: none
(The lint is not in beta yet, this should therefore not be included inside the changelog :) )
Fix commits and formatting of CHANGELOG.md
r? `@Manishearth`
Follow up to #8136
I think the beta commit update didn't take the backport we've done into account. I fixed the commit ranges. And while I was at it, I also applied my usual formatting to the changelog entries.
changelog: none
Add `unnecessary_to_owned` lint
This PR adds a lint to check for unnecessary calls to `ToOwned::to_owned` and other similar functions (e.g., `Cow::into_owned`, `ToString::to_string`, etc.).
The lint checks for expressions of the form `&receiver.to_owned_like()` used in a position requiring type `&T` where one of the following is true:
* `receiver`'s type is `T` exactly
* `receiver`'s type implements `Deref<Target = T>`
* `receiver`'s type implements `AsRef<T>`
The lint additionally checks for expressions of the form `receiver.to_owned_like()` used as arguments of type `impl AsRef<T>`.
It would be nice if the lint could also check for expressions used as arguments to functions like the following:
```
fn foo<T: AsRef<str>>(x: T) { ... }
```
However, I couldn't figure out how to determine whether a function input type was instantiated from a parameter with a trait bound.
If someone could offer me some guidance, I would be happy to add such functionality.
Closes#7933
changelog: Add [`unnecessary_to_owned`] lint
