Lint enum-to-int casts with `cast_possible_truncation`
fixes: #542
~~This will not lint casting a specific variant to an integer. That really should be a new lint as it's definitely a truncation (other than `isize`/`usize` values).~~
changelog: Lint enum-to-int casts with `cast_possible_truncation`
changelog: New lint `cast_enum_truncation`
Fix `await_holding_lock` not linting `parking_lot` Mutex/RwLock
This adds tests for `RwLock` and `parking_lot::{Mutex, RwLock}`, which were added before in 2dc8c083f5, but never tested in UI tests. I noticed this while reading [fasterthanli.me](https://fasterthanli.me/articles/a-rust-match-made-in-hell) latest blog post, complaining that Clippy doesn't catch this for `parking_lot`. (Too many people read his blog, he's too powerful)
Some more things:
- Adds a test for #6446
- Improves the lint message
changelog: [`await_holding_lock`]: Now also lints for `parking_lot::{Mutex, RwLock}`
Even though the FP for that the lints were moved to pedantic isn't fixed
yet, running the lintcheck tool over the most popular 279 crates didn't
trigger this lint once. I would say that this lint is valuable enough,
despite the known FP, to be warn-by-default. Especially since a pretty
nice workaround exists.
Improve `redundant_slicing` lint
fixes#7972fixes#7257
This can supersede #7976
changelog: Fix suggestion for `redundant_slicing` when re-borrowing for a method call
changelog: New lint `deref_as_slicing`
Don't lint `needless_borrow` in method receiver positions
fixes#8408fixes#8407fixes#8391fixes#8367fixes#8380
This is a temporary fix for `needless_borrow`. The proper fix is included in #8355.
This should probably be merged into rustc before beta branches on Friday. This issue has been reported six or seven times in the past couple of weeks.
changelog: Fix various issues with `needless_borrow` n´. Note to changelog writer: those issues might have been introduced in this release cycle, so this might not matter in the changelog.
Don't lint Default::default if it is the udpate syntax base
changelog: Don't lint `Default::default` it is part of the update syntax
Current clippy warns about this:
```
warning: calling `Foo::default()` is more clear than this expression
--> src/main.rs:12:11
|
12 | ..Default::default()
| ^^^^^^^^^^^^^^^^^^ help: try: `Foo::default()`
|
```
With these changes, it will not lint that particular expression anymore.
new lint: `recursive_format_impl`
The to_string_in_display lint is renamed to recursive_format_impl
A check is added for the use of self formatted with Display or Debug inside any format string in the same impl
The to_string_in_display check is kept as is - like in the format_in_format_args lint
This is my first contribution so please check it for better / more idiomatic checks + error messages. Note the format macro paths are shared with the `format_in_format_args` lint - maybe those could be moved to clippy utils too.
This relates to issues #2691 and #7830
------
changelog: Renamed `to_string_in_display` lint to [`recursive_format_impl`] with new check for any use of self as Display or Debug inside the same format trait impl.
The to_string_in_display lint is renamed to recursive_format_impl
A check is added for the use of self formatted with Display or Debug
inside any format string in the same impl
The to_string_in_display check is kept as is - like in the
format_in_format_args lint
For now only Display and Debug are checked
This could also be extended to other Format traits (Binary, etc.)
Fix `transmute_undefined_repr` with single field `#[repr(C)]` structs
Fixes: #8417
The description has also been made more precise.
changelog: Fix `transmute_undefined_repr` with single field `#[repr(C)]` structs
changelog: Move `transmute_undefined_repr` back to `correctness`
Document `pub` requirement for `new_without_default` lint
fixes#8415
Also adds some UI tests that ensure that `pub` is required on both the struct _and_ the field. The only thing I'm not sure about is that the lint actually [checks](https://github.com/rust-lang/rust-clippy/blob/master/clippy_lints/src/new_without_default.rs#L102) if `new` is _reachable_, not _public_. To the best of my understanding, both the struct and the method need to be public for the method to be reachable for external crates (I certainly didn't manage to craft a counterexample).
changelog: Document `pub` requirement for ``[`new_without_default`]`` lint.
Downgrade transmute_undefined_repr to nursery
Reason: #8417. I am skeptical of this lint but maybe there is a narrower subset of types on which it is useful, so keeping it for now but moving to nursery for further development.
---
*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: Remove [`transmute_undefined_repr`] from default set of enabled lints
Migrate `dbg_macro` to late pass
changelog: Make `dbg_macro` work with crate level attributes and inside macro calls
One down for #6610, fixes#7275
Also fixes#7274, and adds parenthesis around the suggestion for `dbg!(1, 2, 3)` as it expands to a tuple
Remove defaultness from ImplItem.
This information is not really used anywhere, except HIR pretty-printing. This makes ImplItem and TraitItem more similar.
Support `cargo dev bless` for tests with revisions
changelog: internal: Support `cargo dev bless` for tests with revisions
Previously bless wouldn't pick up the saved stderr from `target/debug/tests/manual_assert.stage-id.edition2021.stderr` or `target/debug/tests/manual_assert.stage-id.edition2018.stderr` due to there being multiple revisions of the test output
This tweaks compile-test so the built files end up in e.g. `target/debug/tests/ui`, `target/debug/tests/ui-cargo` rather than share the `tests` dir. `cargo dev bless` then uses that to update all the `.stdout/stdout/fixed` files it can find
Also removes an empty file I found, and the logic to remove empty outputs as compiletest doesn't produce empty `.stdout/stderr` files
