Change `redundant_pattern_matching` to also lint `std::task::Poll`
`reduntant_pattern_matching` currently lints pattern matching on `Option` and `Result` where the `is_variant` utility methods could be used instead: `is_some`, `is_none`, `is_ok`, `is_err`. This PR extends this behaviour to `std::task::Poll`, suggesting the methods `is_pending` and `is_ready`.
Motivation: The current description of `redundant_pattern_matching` mentions
> It's more concise and clear to just use the proper utility function
which in my mind applies to `Poll` as well.
changelog: Enhance [`redundant_pattern_matching`] to also lint on `std::task::Poll`
Qualify `panic!` as `core::panic!` in non-built-in `core` macros
Fixes#78333.
-----
Otherwise code like this
#![no_implicit_prelude]
fn main() {
::std::todo!();
::std::unimplemented!();
}
will fail to compile, which is unfortunate and presumably unintended.
This changes many invocations of `panic!` in a `macro_rules!` definition
to invocations of `$crate::panic!`, which makes the invocations hygienic.
Note that this does not make the built-in macro `assert!` hygienic.
Otherwise code like this
#![no_implicit_prelude]
fn main() {
::std::todo!();
::std::unimplemented!();
}
will fail to compile, which is unfortunate and presumably unintended.
This changes many invocations of `panic!` in a `macro_rules!` definition
to invocations of `$crate::panic!`, which makes the invocations hygienic.
Note that this does not make the built-in macro `assert!` hygienic.
This should make Clippy more resilient and will unblock #78343.
This PR is made against rust-lang/rust to avoid the need for a subtree
sync at @flip1995's suggestion in rust-lang/rust-clippy#6310.
Add a case to `lint_search_is_some` to handle searching strings
Fixes: #6010
This adds a lint which recommends using `contains()` instead of `find()` followed by `is_some()` on strings as suggested in #6010.
This was added as an additional case to
5af88e3c2d/clippy_lints/src/methods/mod.rs (L3037)
I would really appreciate any comments/suggestions for my code!
changelog: Added case to `lint_search_is_some` to handle searching strings
add error_occured field to ConstQualifs,
fix#76064
I wasn't sure what `in_return_place` actually did and not sure why it returns `ConstQualifs` while it's sibling functions return `bool`. So I tried to make as minimal changes to the structure as possible. Please point out whether I have to refactor it or not.
r? `@oli-obk`
cc `@RalfJung`
instead of `find()` follows by `is_some()` on strings
Update clippy_lints/src/find_is_some_on_strs.rs
Co-authored-by: Takayuki Nakata <f.seasons017@gmail.com>
Update clippy_lints/src/methods/mod.rs
Co-authored-by: Philipp Krones <hello@philkrones.com>
Remove `allow` in `option_option` lint test
As it is not triggering locally anymore, I propose to remove `#[allow(clippy::option_option)]` from the test.
The goal is also to see what happens on CI.
closes: #4298
changelog: none
Add `let_underscore_drop`
This line generalizes `let_underscore_lock` (#5101) to warn about any initializer expression that implements `Drop`.
So, for example, the following would generate a warning:
```rust
struct Droppable;
impl Drop for Droppable {
fn drop(&mut self) {}
}
let _ = Droppable;
```
I tried to preserve the original `let_underscore_lock` functionality in the sense that the warning generated for
```rust
let _ = mutex.lock();
```
should be unchanged.
*Please keep the line below*
changelog: Add lint [`let_underscore_drop`]
Fix bad suggestions for `deref_addrof` and `try_err` lints
Fix bad suggestions when in macro expansion for `deref_addrof` and `try_err` lints.
Fixes: #6234Fixes: #6242Fixes: #6237
changelog: none
r? `@llogiq`
We skip the lint if the `loop {}` is in the `#[panic_handler]` as the
main recommendation we give is to panic, which obviously isn't
possible in a panic handler.
Signed-off-by: Joe Richey <joerichey@google.com>
Check when `from_utf8` is called from sliced byte array from string
---
*Please keep the line below*
changelog: Fix#5487: Add linter to check when `from_utf8` is called from sliced byte array from string.
"Respect" enums in `interior_mutable_const`
fixes#3962fixes#3825
Hello,
It might not be a good idea to submit another relatively large PR while I have an opened PR; but, I've finished this anyway. This may be able to wait for months.
Note: the code uses the MIR interpreter, which the author of #3962 thought unlikely to be a solution. This might be over-engineering; but, I think it's important to be able to work with the 'http' crate (#3825). (And, I don't want to write a MIR visitor)
---
changelog: fix a false positive in two `interior_mutable_const` lints where a constant with enums gets linted
even if it uses a clearly unfrozen variant
Add lint for 'field_reassign_with_default` #568
changelog: Add lint for field_reassign_with_default that checks if mutable object + field modification is used to edit a binding initialized with Default::default() instead of struct constructor.
Fixes#568
Notes:
- Checks for reassignment of one or more fields of a binding initialized with Default::default().
- Implemented using EarlyLintPass, might be future proofed better with LateLintPass.
- Does not trigger if Default::default() is used via another type implementing Default.
- This is a re-open of [PR#4761](https://github.com/rust-lang/rust-clippy/pull/4761), but I couldn't figure out how to re-open that one so here's a new one with the requested changes :S
Use const sym where possible
I ran a regex search and replace to use const `sym` values where possible. This should give some performance boost by avoiding string interning at runtime.
Con: It is not as consistent as always using `sym!`.
I also changed an internal lint to suggest using `sym::{}`, making an assumption that this will always work for diagnostic items.
changelog: none
Add lint 'ref_option_ref' #1377
This lint checks for usage of `&Option<&T>` which can be simplified as `Option<&T>` as suggested in #1377.
This WIP PR is here to get feedback on the lint as there's more cases to be handled:
* statics/consts,
* associated types,
* type alias,
* function/method parameter/return,
* ADT definitions (struct/tuple struct fields, enum variants)
changelog: Add 'ref_option_ref' lint
Add lint: from_iter_instead_of_collect
Fixes#5679
This implements lint for `::from_iter()` from #5679 not the general issue (`std::ops::Add::add`, etc.).
This lint checks if expression is function call with `from_iter` name and if it's implementation of the `std::iter::FromIterator` trait.
changelog: Introduce from_iter_instead_of_collect lint
single_char_insert_str: lint using insert_str() on single-char literals and suggest insert()
Fixes#6026
changelog: add single_char_insert_str lint which lints using string.insert_str() with single char literals and suggests string.insert() with a char
- Implement `field_reassign_with_default` as a `LateLintPass`
- Avoid triggering `default_trait_access` on a span already linted by
`field_reassigned_with_default`
- Merge `default_trait_access` and `field_reassign_with_default` into
`Default`
- Co-authored-by: Eduardo Broto <ebroto@tutanota.com>
- Fixes#568
Update the existing arithmetic lint
re: #6209
Updates the lint to not the error message if RHS of binary operation `/` of `%` is a literal/constant that is not `0` or `-1`, as suggested [here](https://github.com/rust-lang/rust-clippy/issues/6209#issuecomment-715624354)
changelog: Expand [`integer_arithmetic`] to work with RHS literals and constants
fix the error-causing suggestion of 'borrowed_box'
Fixes#3128
Fix the suggestion of 'borrowed_box', which causes a syntax error because it misses necessary parentheses.
---
changelog: Fix the error-causing suggestion of 'borrowed_box'
Add lint for comparing to empty slices instead of using .is_empty()
Hey first time making a clippy lint
I added the implementation of the lint the `len_zero` since it shared a lot of the code, I would otherwise have to rewrite. Just tell me if the lint should use it's own file instead
changelog: Add lint for comparing to empty slices
Fixes#6217
Lint items after statements in local macro expansions
The items_after_statements lint was skipping all expansions. Instead
we should still lint local macros.
Fixes#578
---
*Please keep the line below*
changelog: The items_after_statements now applies to local macro expansions
No lint in macro for `toplevel_ref_arg`
Do not lint when the span is from a macro.
Question: shouldn't we extend this for external macros also ?
Fixes: #5849
changelog: none
No lint with `cfg!` and fix sugg for macro in `needless_bool` lint
Don't lint if `cfg!` macro is one of the operand.
Fix suggestion when the span originated from a macro, using `hir_with_macro_callsite`.
Fixes: #3973
changelog: none
New lint: manual-range-contains
This fixes#1110, at least for the contains-suggesting part.
- \[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`
- \[x] Added lint documentation
- \[x] Run `cargo dev fmt`
---
changelog: new lint: manual-range-contains
Add lint for `&mut Mutex::lock`
Fixes#1765
changelog: Add lint [`mut_mutex_lock`] for `&mut Mutex::lock` and suggests using `&mut Mutex::get_mut` instead.
Update empty_loop documentation/message.
Originally part of #6161, but now this PR only deals with `std` crates
This change:
- Updates the `std` message .
- Updates the docs to mention how the busy loops should be fixed
- Gives examples of how to do this for `no_std` targets
- Updates the tests/stderr files to test this change.
changelog: Update `empty_loop` lint documentation
Add new lint for undropped ManuallyDrop values
Adds a new lint for the following code:
```rust
struct S;
impl Drop for S {
fn drop(&mut self) {
println!("drip drop");
}
}
fn main() {
// This will not drop the `S`!!!
drop(std::mem::ManuallyDrop::new(S));
unsafe {
// This will.
std::mem::ManuallyDrop::drop(&mut std::mem::ManuallyDrop::new(S));
}
}
```
The inner value of a `ManuallyDrop` will not be dropped unless the proper, unsafe drop function is called on it. This lint makes sure that a user does not accidently use the wrong function and forget to drop a `ManuallyDrop` value.
Fixes#5581.
---
*Please keep the line below*
changelog: none
Add lint for holding RefCell Ref across an await
Fixes#6008
This introduces the lint await_holding_refcell_ref. For async functions, we iterate
over all types in generator_interior_types and look for `core::cell::Ref` or `core::cell::RefMut`. If we find one then we emit a lint.
Heavily cribs from: https://github.com/rust-lang/rust-clippy/pull/5439
changelog: introduce the await_holding_refcell_ref lint
Lint unnecessary int-to-int and float-to-float casts
This is an implementation of a lint that detects unnecessary casts of number literals, as discussed here:
https://github.com/rust-lang/rust-clippy/issues/6116
---
changelog: lint unnecessary as-casts of literals when they could be written using literal syntax.
Refactor trivially_copy_pass_by_ref and the new lint into pass_by_ref_or_value module
Update stderr of conf_unknown_key test
Rename lint to large_types_passed_by_value
Increase `pass_by_value_size_limit` default value to 256
Improve rules for `large_types_passed_by_value`
Improve tests for `large_types_passed_by_value`
Improve documentation for `large_types_passed_by_value`
Make minor corrections to pass_by_ref_or_value.rs suggested by clippy itself
Fix `large_types_passed_by_value` example and improve docs
pass_by_ref_or_value: Tweak check for mut annotation in params
large_types_passed_by_value: add tests for pub trait, trait impl and inline attributes
We also update the documentation to note that the remediations are
different for `std` and `no_std` crates.
Signed-off-by: Joe Richey <joerichey@google.com>
Identical arguments on assert macro family
Lint when identical args are used on `assert_eq!`, `debug_assert_eq!`, `assert_ne!` and `debug_assert_ne!` macros.
Added to the lint `eq_op`.
Common functions added to `utils/higher.rs`
Fixes: #3574Fixes: #4694
changelog: Lint on identical args when calling `assert_eq!`, `debug_assert_eq!`, `assert_ne!` and `debug_assert_ne!` macros
