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`]
