Make it possible to correctly indent snippet_block snippets
This adds a `indent_relative_to` arg to the `{snippet,expr}_block` functions. This makes it possible to keep the correct indentation of block like suggestions.
In addition, this makes the `trim_multiline` function private and adds a `indent_of` function, to get the indentation of the first line of a span.
The suggestion of `needless_continue` cannot be made auto applicable, since it would be also necessary to remove code following the linted expression. (Well, maybe it is possible, but I don't know how to do it. Expanding the suggestion span to the last expression, that should be removed didn't work)
changelog: Improve suggestions, when blocks of code are involved
Port mitsuhiko's excessive bools lints
Closes#4 .
changelog: add `struct_excessive_bools` and `fn_params_excessive_bools` lints.
I moved is_trait_impl_item check because at first I implemented it as a late pass for some reason but then I realized it's actually an early lint. But it's a useful function to have, should I move it into a separate pr?
Do not lint `unnecessary_unwrap` in external macros
Fixes#5131
I think we shouldn't lint `{panicking, unnecessary}_unwrap` in macros, not just `assert!`.
changelog: Fix false positive in `unnecessary_unwrap`
Use `checked_sub` to avoid index out of bounds
(Fixes) #4681 (possibly)
The issue likely occurs due to `lit_snip.len() < suffix.len() + 1`. You can see similar backtrace to change it to `lit_snip.len() - suffix.len() - 1000` or something then run `cargo test --release`.
But I couldn't come up with the test so I'd leave the issue open if we want.
changelog: Fix potential ICE in `misc_early`
Tweak documentation in `multiple_crate_versions`
This example isn't reproducible now since `ctrlc` upgrades `winapi` to `0.3.x` in `3.1.1`. We should pin their versions to trigger lint correctly.
changelog: none
Fix syntax highlighting of code fences
The documentation for RESULT_EXPECT_USED includes this code:
let res: Result<usize, ()> = Ok(1);
res?;
# Ok::<(), ()>(())
Because the code fence didn't start with `rust`, the code wasn't highlighted and the line starting with `#` was displayed on the website. This is now fixed.
EDIT: I noticed that highlighting for some other lints is broken as well. It only works if the code fence looks like this:
````markdown
```rust
// ..
```
````
However, many code blocks were ignored. I un-ignored most code blocks and made them compile by adding hidden code with `#`. While doing so, I found two mistakes:
```rust
opt.map_or(None, |a| a + 1)
// instead of
opt.map_or(None, |a| Some(a + 1))
```
and
```rust
fn as_str(self) -> &str
// instead of
fn as_str(self) -> &'static str
```
changelog: none
The documentation for RESULT_EXPECT_USED includes this code:
let res: Result<usize, ()> = Ok(1);
res?;
# Ok::<(), ()>(())
Because the code fence didn't start with `rust`, the code wasn't highlighted and the line starting with `#` was displayed on the website. This is now fixed.
Clean up `span_lint` in `methods/mod.rs`
Uses `span_help_and_lint` instead of `span_lint` and `span_lint_and_sugg` instead of `span_lint_and_then`.
changelog: none
dont fire `possible_missing_comma` if intendation is present
Closes#4399
changelog: dont fire `possible_missing_comma` if intendation is present
I suspect there is already a utils function for indentation (but searching indent didn't yield a function for that), and my solution is certainly not universal, but it's probably the best we can do.
Detect usage of invalid atomic ordering in memory fences
Detect usage of `core::sync::atomic::{fence, compiler_fence}` with `Ordering::Relaxed` and suggest valid alternatives.
changelog: Extend `invalid_atomic_ordering` to lint memory fences
Fixes#5026
Avoid mut_key on types of unknown layout
This fixes#5020 by requiring a known layout for the key type before linting. Edit: This fixes#5043, too.
changelog: none
Keep the ordering in `nonminimal_bool` lint
I believe it shouldn't cause any regression but feel free to let me know if you have a doubtful example.
Also, splits up `booleans` ui test.
Fixes#5045
changelog: none
Match wild err arm improvements
This lint should trigger on other identifiers which have `_` prefix (such as `_e`) and only if they are unused in the panic block.
_Note_: the `is_unused` function is greatly inspired from `pat_is_wild` function in [loops lints](43ac9416d9/clippy_lints/src/loops.rs (L1689)).
I've been considering doing some refactoring, maybe in utils. Maybe this PR or a new one. What do you think ?
fixes#5024
changelog: none
New lint: pats_with_wild_match_arm
Wildcard use with other pattern in same match arm.
The wildcard covers other(s) pattern(s) as it will match anyway.
changelog: add new lint when multiple patterns (including wildcard) are used in a match arm.
Fixes#4640.
Fix redundant_clone lint not working with PathBuf and OsString
https://github.com/rust-lang/rust-clippy/pull/4825 diabled MIR optimization in clippy, including `rustc_mir::transform::InstCombine` which reduces `&(*x)` to `x`. This PR tries to unwrap `&*` when looking into `mir::Rvalue`s.
Fixes#5014.
---
changelog: fixed `redundant_clone` lint not working with `PathBuf` and `OsString`
Move `transmute_float_to_int` lint to `complexity`
`transmute_float_to_int` lint was accidentally added to nursery so moving it to the complexity group.
changelog: Move `transmute_float_to_int` out of nursery
Detect usage of invalid atomic ordering modes such as
`Ordering::{Release, AcqRel}` in atomic loads and
`Ordering::{Acquire, AcqRel}` in atomic stores.
Use `mem::take` instead of `mem::replace` when applicable
`std::mem::take` can be used to replace a value of type `T` with `T::default()` instead of `std::mem::replace`.
Fixes issue #4871
changelog: Added lint for [`mem_replace_with_default`]
Fix ICE on `unsound_collection_transmute`
Fixes#4968
Check if `Ty`s are normalizable. It might show hidden false negative, I'm not sure.
Also, the regression tests are placed on two dirs, so move them to `/crashes`. I think it will be easier to find the right place.
changelog: Fix ICE on `unsound_collection_transmute`
Currently `replace_consts` lint applies within match patterns but
the suggestion is incorrect as function calls are disallowed in
them. To fix this we prevent the lint from firing within patterns.
Fix `replace_consts` lint documentation
`replace_consts` lint no longer lints for the usage of
`ATOMIC_{SIZE}_INIT` and `ONCE_INIT` so removing any
occurences of them in the documentation.
changelog: Update `replace_consts` lint documentation
new lint: mutable_key_type
This fixes#732 - well, partly, it doesn't adress `Hash` impls, but the use of mutable types as map keys or set members
changelog: add `mutable_key_type` lint
r? @flip1995
Add `let_underscore_must_use` lint
changelog: closes#4812 , added a new `let_underscore_must_use` lint, moved `is_must_use_ty` to utils, added `is_must_use_fn` util function
Fix `map_clone` false positive
Don't lint when the item type is not a reference. `copied` only applies to references.
changelog: Fix `map_clone` false positive
Currently the cognitive complexity lint spans the entire function
body making it really difficult to read and refactor the code in
editors. To fix this we reduce the lint span to the function name.
Move `iterator_step_by_zero` and correct the documentation
Move `iterator_step_by_zero` and correct the documentation.
changelog: Corrected `iterator_step_by_zero` documentation
Currently `cmp_nan` lint doesn't detect comparisons with NaN's
if the operands are consts variables so to fix this we evaluate
the const variables first before testing for NaN.
Fix false positive with cast_sign_loss lint
`cast_sign_loss` lint incorrectly suggests that the result of `checked_abs`, `rem_euclid` and `checked_rem_euclid` cannot be casted to an unsigned integer without loss.
Fixes#4818#4764#4743
changelog: Fix false positives in `cast_sign_loss` lint
The Rust Book recommends that functions that return a `Result` type have
a doc comment with an `# Errors` section describing the kind of errors
that can be returned
(https://doc.rust-lang.org/book/ch14-02-publishing-to-crates-io.html#commonly-used-sections).
This change adds a lint to enforce this. The lint is allow by default;
it can be enabled with `#![warn(clippy::missing_errors_doc)]`.
Closes#4854.
`cast_sign_loss` lint incorrectly suggests that the result of
`checked_abs`, `rem_euclid` and `checked_rem_euclid` cannot
be casted to an unsigned integer without loss.
Fix FP in manual_swap lint with slice-like types
Fixes#4853
changelog: Fix FP in [`manual_swap`] lint with slice-like types and make it auto applicable
This utilizes https://github.com/rust-lang/rust/pull/60584 by setting
our own `panic_hook` and pointing to our own issue tracker instead of
the rustc issue tracker.
This also adds a new internal lint to test the ICE message.
**Potential downsides**
* This essentially copies rustc's `report_ice` function as
`report_clippy_ice`. I think that's how it's meant to be implemented, but
maybe @jonas-schievink could have a look as well =)
The downside of more-or-less copying this function is that we have to
maintain it as well now.
The original function can be found [here][original].
* `driver` now depends directly on `rustc` and `rustc_errors`
Closes#2734
[original]: 59367b074f/src/librustc_driver/lib.rs (L1185)
Move use_self to nursery
Closes#4859
We have a lot of false positives in this lint, so I think it makes sense
to move this to the nursery until they are resolved.
changelog: Move `use_self` lint to nursery, due to many false positives
Closes#4859
We have a lot of false positives in this lint, so I think it makes sense
to move this to the nursery until they are resolved.
changelog: Move `use_self` lint to nursery, due to many false positives