Ensure ASM syntax detect `global_asm!` and `asm!` only on x86 architectures
The ASM syntax lint is only relevant on x86 architectures, so this PR ensures it doesn't trigger on other architectures. This PR also makes the lints check `global_asm!` items as well as `asm!` expressions.
changelog: Check `global_asm!` items in the ASM syntax lints, and fix false positives on non-x86 architectures.
[`incompatible_msrv`]: allow expressions that come from desugaring
Fixes#12273
changelog: [`incompatible_msrv`]: don't lint on the `IntoFuture::into_future` call desugared by `.await`
[`implied_bounds_in_impls`]: avoid linting on overlapping associated tys
Fixes#11880
Before this change, we were simply ignoring associated types (except for suggestion purposes), because of an incorrect assumption (see the comment that I also removed).
For something like
```rs
trait X { type T; }
trait Y: X { type T; }
// Can't constrain `X::T` through `Y`
fn f() -> impl X<T = i32> + Y<T = u32> { ... }
```
We now avoid linting if the implied bound (`X<T = i32>`) "names" associated types that also exists in the implying trait (`trait Y`). Here that would be the case.
But if we only wrote `impl X + Y<T = u32>` then that's ok because `X::T` was never constrained in the first place.
I haven't really thought about how this interacts with GATs, but I think it's fine. Fine as in, it might create false negatives, but hopefully no false positives.
(The diff is slightly annoying because of formatting things. Really the only thing that changed in the if chain is extracting the `implied_by_def_id` which is needed for getting associated types from the trait, and of course actually checking for overlap)
cc `@Jarcho` ? idk if you want to review this or not. I assume you looked into this code a bit to find this bug.
changelog: [`implied_bounds_in_impls`]: avoid linting when associated type from supertrait can't be constrained through the implying trait bound
[`mem_replace_with_default`] No longer triggers on unused expression
changelog:[`mem_replace_with_default`]: No longer triggers on unused expression
Change [`mem_replace_with_default`] to not trigger on unused expression because the lint from `#[must_use]` handle this case better.
fixes: #5586
fix: ICE when array index exceeds usize
fixes#12253
This PR fixes ICE in `indexing_slicing` as it panics when the index of the array exceeds `usize`.
changelog: none
stop linting [`blocks_in_conditions`] on `match` with weird attr macro case
should fixes: #12016
---
changelog: [`blocks_in_conditions`] - fix FP on `match` with weird attr macro
This might not be the best solution, as the root cause (i think?) is the `span` of block was incorrectly given by the compiler?
I'm open to better solutions
A lot of cases of the "noise" cases of `similar_names` come from two
idents with a different first letter, which is easy enough to
differentiate visually but causes this lint to be raised.
Do not raise the lint in these cases, as long as the first character
does not have a lookalike.
Link: https://github.com/rust-lang/rust-clippy/issues/10926
Fix issue #12034: add autofixes for unnecessary_fallible_conversions
fixes#12034
Currently, the `unnecessary_fallible_conversions` lint was capable of autofixing expressions like `0i32.try_into().unwrap()`. However, it couldn't autofix expressions in the form of `i64::try_from(0i32).unwrap()` or `<i64 as TryFrom<i32>>::try_from(0).unwrap()`.
This pull request extends the functionality to correctly autofix these latter forms as well.
changelog: [`unnecessary_fallible_conversions`]: Add autofixes for more forms
[`unconditional_recursion`]: compare by `Ty`s instead of `DefId`s
Fixes#12154Fixes#12181 (this was later edited in, so the rest of the description refers to the first linked issue)
Before this change, the lint would work with `DefId`s and use those to compare types. This PR changes it to compare types directly. It fixes the linked issue, but also other false positives I found in a lintcheck run. For example, one of the issues is that some types don't have `DefId`s (primitives, references, etc., leading to possible FNs), and the helper function used to extract a `DefId` didn't handle type parameters.
Another issue was that the lint would use `.peel_refs()` in a few places where that could lead to false positives (one such FP was in the `http` crate). See the doc comment on one of the added functions and also the test case for what I mean.
The code in the linked issue was linted because the receiver type is `T` (a `ty::Param`), which was not handled in `get_ty_def_id` and returned `None`, so this wouldn't actually *get* to comparing `self_arg != ty_id` here, and skip the early-return:
70573af31e/clippy_lints/src/unconditional_recursion.rs (L171-L178)
This alone could be fixed by doing something like `&& get_ty_def_id(ty).map_or(true, |ty_id)| self_arg != ty_id)`, but we don't really need to work with `DefId`s in the first place, I don't think.
changelog: [`unconditional_recursion`]: avoid linting when the other comparison type is a type parameter
Fix false positive in `redundant_type_annotations` lint
This PR changes the `redundant_type_annotations` lint to allow slice type annotations (i.e., `&[u8]`) for byte string literals. It will still consider _array_ type annotations (i.e., `&[u8; 4]`) as redundant. The reasoning behind this is that the type of byte string literals is by default a reference to an array, but, by using a type annotation, you can force it to be a slice. For example:
```rust
let a: &[u8; 4] = b"test";
let b: &[u8] = b"test";
```
Now, the type annotation for `a` will still be linted (as it is still redundant), but the type annotation for `b` will not.
Fixes#12212.
changelog: [`redundant_type_annotations`]: Fix false positive with byte string literals
Return `Some` from `walk_to_expr_usage` more
fixes#11786
supersedes #11097
The code removed in the first commit would have needed changes due to the second commit. Since it's useless it just gets removed instead.
changelog: `needless_borrow`: Fix linting in tuple and array expressions.
[`redundant_locals`]: take by-value closure captures into account
Fixes#12225
The same problem in the linked issue can happen to regular closures too, and conveniently async blocks are closures in the HIR so fixing closures will fix async blocks as well.
changelog: [`redundant_locals`]: avoid linting when redefined variable is captured by-value
make matching on NaN a hard error, and remove the rest of illegal_floating_point_literal_pattern
These arms would never be hit anyway, so the pattern makes little sense. We have had a future-compat lint against float matches in general for a *long* time, so I hope we can get away with immediately making this a hard error.
This is part of implementing https://github.com/rust-lang/rfcs/pull/3535.
Closes https://github.com/rust-lang/rust/issues/41620 by removing the lint.
https://github.com/rust-lang/reference/pull/1456 updates the reference to match.
Add new lint: `ref_as_ptr`
Fixes#10130
Added new lint `ref_as_ptr` that checks for conversions from references to pointers and suggests using `std::ptr::from_{ref, mut}` instead.
The name is different than suggested in the issue (`as_ptr_cast`) since there were some other lints with similar names (`ptr_as_ptr`, `borrow_as_ptr`) and I wanted to follow the convention.
Note that this lint conflicts with the `borrow_as_ptr` lint in the sense that it recommends changing `&foo as *const _` to `std::ptr::from_ref(&foo)` instead of `std::ptr::addr_of!(foo)`. Personally, I think the former is more readable and, in contrast to `addr_of` macro, can be also applied to temporaries (cf. #9884).
---
changelog: New lint: [`ref_as_ptr`]
[#12087](https://github.com/rust-lang/rust-clippy/pull/12087)
Fixed FP in `unused_io_amount` for Ok(lit), unrachable! and unwrap de…
…sugar
Fixes fp caused by linting on Ok(_) for all cases outside binding.
We introduce the following rules for match exprs.
- `panic!` and `unreachable!` are treated as consumed.
- `Ok( )` patterns outside `DotDot` and `Wild` are treated as consuming.
changelog: FP [`unused_io_amount`] when matching Ok(literal) or unreachable
fixes#12208
r? `@blyxyas`
We introduce the following rules for match exprs.
- `panic!` and `unreachable!` are treated as consumption.
- guard expressions in any arm imply consumption.
For match exprs:
- Lint only if exacrtly 2 non-consuming arms exist
- Lint only if one arm is an `Ok(_)` and the other is `Err(_)`
Added additional requirement that for a block return expression
that is a match, the source must be `Normal`.
changelog: FP [`unused_io_amount`] when matching Ok(literal)
`Diagnostic::keys`, which is used for hashing and equating diagnostics,
has a surprising behaviour: it ignores children, but only for lints.
This was added in #88493 to fix some duplicated diagnostics, but it
doesn't seem necessary any more.
This commit removes the special case and only four tests have changed
output, with additional errors. And those additional errors aren't
exact duplicates, they're just similar. For example, in
src/tools/clippy/tests/ui/same_name_method.rs we currently have this
error:
```
error: method's name is the same as an existing method in a trait
--> $DIR/same_name_method.rs:75:13
|
LL | fn foo() {}
| ^^^^^^^^^^^
|
note: existing `foo` defined here
--> $DIR/same_name_method.rs:79:9
|
LL | impl T1 for S {}
| ^^^^^^^^^^^^^^^^
```
and with this change we also get this error:
```
error: method's name is the same as an existing method in a trait
--> $DIR/same_name_method.rs:75:13
|
LL | fn foo() {}
| ^^^^^^^^^^^
|
note: existing `foo` defined here
--> $DIR/same_name_method.rs:81:9
|
LL | impl T2 for S {}
| ^^^^^^^^^^^^^^^^
```
I think printing this second argument is reasonable, possibly even
preferable to hiding it. And the other cases are similar.
