This lint makes Clippy warn about situations where an owned
struct is essentially recreated by moving all its fields into a
new instance of the struct. Until now this lint only triggered
for structs recreated from a base struct.
NB: The new functionality too will cause false positives for the
situation where a non-copy struct consisting of all copy members
is touched again in subsequent code.
Remove internal `compiler_lint_functions` lint
This internal lint has effectively been superseded by `disallowed_methods` when we started using that in #11811 (I didn't even know that we also had this internal lint at the time of when I created that PR).
Some of the methods that this looks for also don't exist anymore (`span_lint_note` and `span_lint_help`), though there was one that that lint had but wasn't disallowed in clippy.toml (`LintContext::lint`)
changelog: none
Refactor `assigning_clones`
Short list of changes:
* Inline and simplify `extract_call`
* Inline `is_ok_to_suggest`
* Inline `skip_drop_block`
* Check the HIR tree before the macro check
* Don't call `outer_expn_data`
* Use `find` instead of a loop in `clone_source_borrows_from_dest`
changelog: none
`significant_drop_in_scrutinee`: Trigger lint also for scrutinees in `while let` and `if let`
This lint should also work for `if let` and `while let`, so this PR makes it actually work.
For `while let`, I can't think of any reason why this lint shouldn't be enabled. The only problem is that the lint suggests moving the significant drop above the `while let`, which is clearly invalid in the case of `while let`. I don't know if this is fixable, but this PR simply disables the wrong suggestions.
For `if let`, it seems that another lint called `if_let_mutex` has some overlapping functionality. But `significant_drop_in_scrutinee` is a bit stricter, as it will trigger even if the `else` branch does not try to lock the same mutex.
changelog: [`significant_drop_in_scrutinee`]: Trigger lint also for scrutinees in `while let` and `if let`.
r? `@blyxyas` (the third PR as promised in https://github.com/rust-lang/rust-clippy/pull/12740#issuecomment-2094876350, thanks for your review!)
Reduce the size of lintcheck JSON output
Saves about 80% of the size by picking out what we need rather than serialising the whole diagnostic
r? `@xFrednet`
changelog: none
[`missing_const_for_fn`]: fix FP when arg ty is impl trait alias ty
closes: #13009
---
changelog: [`missing_const_for_fn`]: fix FP when arg ty is impl trait alias ty
Rework `init_numbered_fields`
Two behaviour changes:
* Not linting in macros
* Not linting when side effects might be reordered
changelog: `init_numbered_fields`: Don't suggest reordering side effects.
Lintcheck: Add `--warn-all` and make it the CI default
This PR adds a new `--warn-all` flag to lintcheck. This is intended for our CI, as it currently doesn't detect changes of `nursery` and `restriction` lints.
I only made it the default for the CI, as `restriction` lints tend to generate A LOT of lint triggers. Looking at you [`clippy::implicit_return`](https://rust-lang.github.io/rust-clippy/master/index.html#/clippy::implicit_return)
That's it. Should hopefully be easy to review.
Also, a bit thanks again to `@Alexendoo` for adding this to our CI ❤️
---
r? `@Alexendoo`
changelog: none
Refactor `disallowed_methods` and narrow span
Using the span of the call site just produces noisy diagnostics for long calls. Especially multi-line calls.
changelog: none
Clarify that `modulo_one` only applies to ints
changelog: [`modulo_one`]: (docs) Clarify that it only applies to integers
This might be nitpicky, but it's more technically correct.
It also helps if a user skims through the docs, because they may believe it also applies to `{float}`s. This doc edit minimizes that possibility
Rename thread_local_initializer_can_be_made_const to missing_const_for_thread_local
Close#12934
As discussed at #12934 name `thread_local_initializer_can_be_made_const` sounds against convention for other lints which describe the issue/wrong code but not suggestion and it is quite long. The new name take example from existing lint `missing_const_for_fn`
changelog: `thread_local_initializer_can_be_made_const` : Rename to [`missing_const_for_thread_local`]
feat: add cfg_not_test lint
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- \[x] Followed [lint naming conventions][lint_naming]
- \[x] Added passing UI tests (including committed `.stderr` file)
- \[x] `cargo test` passes locally
- \[x] Executed `cargo dev update_lints`
- \[ ] Added lint documentation
- \[x] Run `cargo dev fmt`
[lint_naming]: https://rust-lang.github.io/rfcs/0344-conventions-galore.html#lints
-->
Fixes#11234
changelog: new lint: [`cfg_not_test`]
I don't know whether to lint only the `attr` or also the item associated to it. I guess this would mean putting the check in another place than `check_attribute` but I can't find a way to get the associated item to the attribute.
Also, I'm not sure how to document this lint, I feel like my explications are bad.
Remove `is_in_test_module_or_function`
Uses are replaced with `is_in_test` for consistency with other lints and to simplify the implementation of the lints. This means the module name is no longer checked, but that was a horrible hack from a time when late passes couldn't see `#[cfg(..)]` attributes.
changelog: none
[`unnecessary_to_owned`]: catch `to_owned` on byte slice to create temporary `&str`
Closes#11648
Detects the pattern `&String::from_utf8(bytes.to_vec()).unwrap()` and suggests `core::str::from_utf8(bytes).unwrap()`, which avoids the unnecessary intermediate allocation.
I decided to put this in the existing `unnecessary_to_owned` lint (rather than creating a new lint) for a few reasons:
- we get to use some of its logic (for example, recognizing any of the functions in the `to_owned` family, e.g. `to_vec`)
- the actual inefficient operation that can be avoided here is the call to `.to_vec()`, so this is in a way similar to the other cases caught by `unnecessary_to_owned`, just through a bunch of type conversions
- we can make this more "generic" later and catch other cases, so imo it's best not to tie this lint specifically to the `String` type
changelog: [`unnecessary_to_owned`]: catch `&String::from_utf8(bytes.to_vec()).unwrap()` and suggest `core::str::from_utf8(bytes).unwrap()`
[`missing_const_for_fn`]: fix suggestions for fn with abi that requires `const_extern_fn` feature
closes: #13008
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changelog: [`missing_const_for_fn`]: fix suggestions for fn with abi that requires `const_extern_fn` feature.
Add new lint for byte char slices
This patch adds a new lint that checks for potentially harder to read byte char slices: `&[b'a', b'b']` and suggests to replace them with the easier to read `b"ab"` form.
Fixes#10147
---
changelog: new lint: [`byte_char_slices`]
[#10155](https://github.com/rust-lang/rust-clippy/pull/10155)
<!-- changelog_checked -->
This patch adds a new lint that checks for potentially harder to read
byte char slices: `&[b'a', b'b']` and suggests to replace them with the
easier to read `b"ab"` form.
Signed-Off-By: Marcel Müller <m.mueller@ifm.com>
Co-authored-by: Matthias Beyer <matthias.beyer@ifm.com>
Use iterator to skip validation
Signed-off-by: Marcel Müller <m.mueller@ifm.com>
Suggested-by: Alex Macleod <alex@macleod.io>
Convert quote escapes to proper form
Signed-off-by: Marcel Müller <m.mueller@ifm.com>
Add more convertable test cases
Signed-off-by: Marcel Müller <m.mueller@ifm.com>
