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Merge commit '60cb29c5e4f9772685c9873752196725c946a849' into clippyup

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This commit is contained in:
Philipp Krones 2024-02-08 20:24:42 +01:00
parent 7a827028a5
commit f3b3d23416
131 changed files with 3886 additions and 621 deletions
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15
.github/driver.sh vendored Normal file → Executable file
View file

@ -11,9 +11,16 @@ if [[ ${OS} == "Windows" ]]; then
else
desired_sysroot=/tmp
fi
# Set --sysroot in command line
sysroot=$(./target/debug/clippy-driver --sysroot $desired_sysroot --print sysroot)
test "$sysroot" = $desired_sysroot
# Set --sysroot in arg_file.txt and pass @arg_file.txt to command line
echo "--sysroot=$desired_sysroot" > arg_file.txt
sysroot=$(./target/debug/clippy-driver @arg_file.txt --print sysroot)
test "$sysroot" = $desired_sysroot
# Setting SYSROOT in command line
sysroot=$(SYSROOT=$desired_sysroot ./target/debug/clippy-driver --print sysroot)
test "$sysroot" = $desired_sysroot
@ -24,6 +31,14 @@ test "$sysroot" = $desired_sysroot
SYSROOT=/tmp RUSTFLAGS="--sysroot=$(rustc --print sysroot)" ../target/debug/cargo-clippy clippy --verbose
)
# Check that the --sysroot argument is only passed once via arg_file.txt (SYSROOT is ignored)
(
echo "fn main() {}" > target/driver_test.rs
echo "--sysroot="$(./target/debug/clippy-driver --print sysroot)"" > arg_file.txt
echo "--verbose" >> arg_file.txt
SYSROOT=/tmp ./target/debug/clippy-driver @arg_file.txt ./target/driver_test.rs
)
# Make sure this isn't set - clippy-driver should cope without it
unset CARGO_MANIFEST_DIR

66
CHANGELOG.md
View file

@ -6,11 +6,65 @@ document.
## Unreleased / Beta / In Rust Nightly
[09ac14c9...master](https://github.com/rust-lang/rust-clippy/compare/09ac14c9...master)
[a859e5cc...master](https://github.com/rust-lang/rust-clippy/compare/a859e5cc...master)
## Rust 1.76
Current stable, released 2024-02-08
[View all 85 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-11-02T20%3A23%3A40Z..2023-12-16T13%3A11%3A08Z+base%3Amaster)
### New Lints
- [`infinite_loop`]
[#11829](https://github.com/rust-lang/rust-clippy/pull/11829)
- [`ineffective_open_options`]
[#11902](https://github.com/rust-lang/rust-clippy/pull/11902)
- [`uninhabited_references`]
[#11878](https://github.com/rust-lang/rust-clippy/pull/11878)
- [`repeat_vec_with_capacity`]
[#11597](https://github.com/rust-lang/rust-clippy/pull/11597)
- [`test_attr_in_doctest`]
[#11872](https://github.com/rust-lang/rust-clippy/pull/11872)
- [`option_map_or_err_ok`]
[#11864](https://github.com/rust-lang/rust-clippy/pull/11864)
- [`join_absolute_paths`]
[#11453](https://github.com/rust-lang/rust-clippy/pull/11453)
- [`impl_hash_borrow_with_str_and_bytes`]
[#11781](https://github.com/rust-lang/rust-clippy/pull/11781)
- [`iter_over_hash_type`]
[#11791](https://github.com/rust-lang/rust-clippy/pull/11791)
### Moves and Deprecations
- Renamed `blocks_in_if_conditions` to [`blocks_in_conditions`]
[#11853](https://github.com/rust-lang/rust-clippy/pull/11853)
- Moved [`implied_bounds_in_impls`] to `complexity` (Now warn-by-default)
[#11867](https://github.com/rust-lang/rust-clippy/pull/11867)
- Moved [`if_same_then_else`] to `style` (Now warn-by-default)
[#11809](https://github.com/rust-lang/rust-clippy/pull/11809)
### Enhancements
- [`missing_safety_doc`], [`unnecessary_safety_doc`], [`missing_panics_doc`], [`missing_errors_doc`]:
Added the [`check-private-items`] configuration to enable lints on private items
[#11842](https://github.com/rust-lang/rust-clippy/pull/11842)
### ICE Fixes
- [`impl_trait_in_params`]: No longer crashes when a function has generics but no function parameters
[#11804](https://github.com/rust-lang/rust-clippy/pull/11804)
- [`unused_enumerate_index`]: No longer crashes on empty tuples
[#11756](https://github.com/rust-lang/rust-clippy/pull/11756)
### Others
- Clippy now respects the `CARGO` environment value
[#11944](https://github.com/rust-lang/rust-clippy/pull/11944)
## Rust 1.75
Current stable, released 2023-12-28
Released 2023-12-28
[View all 69 merged pull requests](https://github.com/rust-lang/rust-clippy/pulls?q=merged%3A2023-09-25T11%3A47%3A47Z..2023-11-02T16%3A41%3A59Z+base%3Amaster)
@ -5198,6 +5252,7 @@ Released 2018-09-13
[`implied_bounds_in_impls`]: https://rust-lang.github.io/rust-clippy/master/index.html#implied_bounds_in_impls
[`impossible_comparisons`]: https://rust-lang.github.io/rust-clippy/master/index.html#impossible_comparisons
[`imprecise_flops`]: https://rust-lang.github.io/rust-clippy/master/index.html#imprecise_flops
[`incompatible_msrv`]: https://rust-lang.github.io/rust-clippy/master/index.html#incompatible_msrv
[`inconsistent_digit_grouping`]: https://rust-lang.github.io/rust-clippy/master/index.html#inconsistent_digit_grouping
[`inconsistent_struct_constructor`]: https://rust-lang.github.io/rust-clippy/master/index.html#inconsistent_struct_constructor
[`incorrect_clone_impl_on_copy_type`]: https://rust-lang.github.io/rust-clippy/master/index.html#incorrect_clone_impl_on_copy_type
@ -5276,6 +5331,7 @@ Released 2018-09-13
[`let_with_type_underscore`]: https://rust-lang.github.io/rust-clippy/master/index.html#let_with_type_underscore
[`lines_filter_map_ok`]: https://rust-lang.github.io/rust-clippy/master/index.html#lines_filter_map_ok
[`linkedlist`]: https://rust-lang.github.io/rust-clippy/master/index.html#linkedlist
[`lint_groups_priority`]: https://rust-lang.github.io/rust-clippy/master/index.html#lint_groups_priority
[`little_endian_bytes`]: https://rust-lang.github.io/rust-clippy/master/index.html#little_endian_bytes
[`logic_bug`]: https://rust-lang.github.io/rust-clippy/master/index.html#logic_bug
[`lossy_float_literal`]: https://rust-lang.github.io/rust-clippy/master/index.html#lossy_float_literal
@ -5284,6 +5340,7 @@ Released 2018-09-13
[`manual_assert`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_assert
[`manual_async_fn`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_async_fn
[`manual_bits`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_bits
[`manual_c_str_literals`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_c_str_literals
[`manual_clamp`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_clamp
[`manual_filter`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_filter
[`manual_filter_map`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_filter_map
@ -5523,6 +5580,7 @@ Released 2018-09-13
[`redundant_slicing`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_slicing
[`redundant_static_lifetimes`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_static_lifetimes
[`redundant_type_annotations`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_type_annotations
[`ref_as_ptr`]: https://rust-lang.github.io/rust-clippy/master/index.html#ref_as_ptr
[`ref_binding_to_reference`]: https://rust-lang.github.io/rust-clippy/master/index.html#ref_binding_to_reference
[`ref_in_deref`]: https://rust-lang.github.io/rust-clippy/master/index.html#ref_in_deref
[`ref_option_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#ref_option_ref
@ -5622,6 +5680,7 @@ Released 2018-09-13
[`to_digit_is_some`]: https://rust-lang.github.io/rust-clippy/master/index.html#to_digit_is_some
[`to_string_in_display`]: https://rust-lang.github.io/rust-clippy/master/index.html#to_string_in_display
[`to_string_in_format_args`]: https://rust-lang.github.io/rust-clippy/master/index.html#to_string_in_format_args
[`to_string_trait_impl`]: https://rust-lang.github.io/rust-clippy/master/index.html#to_string_trait_impl
[`todo`]: https://rust-lang.github.io/rust-clippy/master/index.html#todo
[`too_many_arguments`]: https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[`too_many_lines`]: https://rust-lang.github.io/rust-clippy/master/index.html#too_many_lines
@ -5677,6 +5736,7 @@ Released 2018-09-13
[`unnecessary_mut_passed`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_mut_passed
[`unnecessary_operation`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[`unnecessary_owned_empty_strings`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_owned_empty_strings
[`unnecessary_result_map_or_else`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_result_map_or_else
[`unnecessary_safety_comment`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_safety_comment
[`unnecessary_safety_doc`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_safety_doc
[`unnecessary_self_imports`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_self_imports
@ -5819,4 +5879,6 @@ Released 2018-09-13
[`enforce-iter-loop-reborrow`]: https://doc.rust-lang.org/clippy/lint_configuration.html#enforce-iter-loop-reborrow
[`check-private-items`]: https://doc.rust-lang.org/clippy/lint_configuration.html#check-private-items
[`pub-underscore-fields-behavior`]: https://doc.rust-lang.org/clippy/lint_configuration.html#pub-underscore-fields-behavior
[`allow-comparison-to-zero`]: https://doc.rust-lang.org/clippy/lint_configuration.html#allow-comparison-to-zero
[`allowed-wildcard-imports`]: https://doc.rust-lang.org/clippy/lint_configuration.html#allowed-wildcard-imports
<!-- end autogenerated links to configuration documentation -->

2
Cargo.toml
View file

@ -1,6 +1,6 @@
[package]
name = "clippy"
version = "0.1.77"
version = "0.1.78"
description = "A bunch of helpful lints to avoid common pitfalls in Rust"
repository = "https://github.com/rust-lang/rust-clippy"
readme = "README.md"

33
book/src/lint_configuration.md
View file

@ -151,6 +151,7 @@ The minimum rust version that the project supports. Defaults to the `rust-versio
* [`manual_try_fold`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_try_fold)
* [`manual_hash_one`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_hash_one)
* [`iter_kv_map`](https://rust-lang.github.io/rust-clippy/master/index.html#iter_kv_map)
* [`manual_c_str_literals`](https://rust-lang.github.io/rust-clippy/master/index.html#manual_c_str_literals)
## `cognitive-complexity-threshold`
@ -828,3 +829,35 @@ exported visibility, or whether they are marked as "pub".
* [`pub_underscore_fields`](https://rust-lang.github.io/rust-clippy/master/index.html#pub_underscore_fields)
## `allow-comparison-to-zero`
Don't lint when comparing the result of a modulo operation to zero.
**Default Value:** `true`
---
**Affected lints:**
* [`modulo_arithmetic`](https://rust-lang.github.io/rust-clippy/master/index.html#modulo_arithmetic)
## `allowed-wildcard-imports`
List of path segments allowed to have wildcard imports.
#### Example
```toml
allowed-wildcard-imports = [ "utils", "common" ]
```
#### Noteworthy
1. This configuration has no effects if used with `warn_on_all_wildcard_imports = true`.
2. Paths with any segment that containing the word 'prelude'
are already allowed by default.
**Default Value:** `[]`
---
**Affected lints:**
* [`wildcard_imports`](https://rust-lang.github.io/rust-clippy/master/index.html#wildcard_imports)

2
clippy_config/Cargo.toml
View file

@ -1,6 +1,6 @@
[package]
name = "clippy_config"
version = "0.1.77"
version = "0.1.78"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

22
clippy_config/src/conf.rs
View file

@ -260,7 +260,7 @@ define_Conf! {
///
/// Suppress lints whenever the suggested change would cause breakage for other crates.
(avoid_breaking_exported_api: bool = true),
/// Lint: MANUAL_SPLIT_ONCE, MANUAL_STR_REPEAT, CLONED_INSTEAD_OF_COPIED, REDUNDANT_FIELD_NAMES, OPTION_MAP_UNWRAP_OR, REDUNDANT_STATIC_LIFETIMES, FILTER_MAP_NEXT, CHECKED_CONVERSIONS, MANUAL_RANGE_CONTAINS, USE_SELF, MEM_REPLACE_WITH_DEFAULT, MANUAL_NON_EXHAUSTIVE, OPTION_AS_REF_DEREF, MAP_UNWRAP_OR, MATCH_LIKE_MATCHES_MACRO, MANUAL_STRIP, MISSING_CONST_FOR_FN, UNNESTED_OR_PATTERNS, FROM_OVER_INTO, PTR_AS_PTR, IF_THEN_SOME_ELSE_NONE, APPROX_CONSTANT, DEPRECATED_CFG_ATTR, INDEX_REFUTABLE_SLICE, MAP_CLONE, BORROW_AS_PTR, MANUAL_BITS, ERR_EXPECT, CAST_ABS_TO_UNSIGNED, UNINLINED_FORMAT_ARGS, MANUAL_CLAMP, MANUAL_LET_ELSE, UNCHECKED_DURATION_SUBTRACTION, COLLAPSIBLE_STR_REPLACE, SEEK_FROM_CURRENT, SEEK_REWIND, UNNECESSARY_LAZY_EVALUATIONS, TRANSMUTE_PTR_TO_REF, ALMOST_COMPLETE_RANGE, NEEDLESS_BORROW, DERIVABLE_IMPLS, MANUAL_IS_ASCII_CHECK, MANUAL_REM_EUCLID, MANUAL_RETAIN, TYPE_REPETITION_IN_BOUNDS, TUPLE_ARRAY_CONVERSIONS, MANUAL_TRY_FOLD, MANUAL_HASH_ONE, ITER_KV_MAP.
/// Lint: MANUAL_SPLIT_ONCE, MANUAL_STR_REPEAT, CLONED_INSTEAD_OF_COPIED, REDUNDANT_FIELD_NAMES, OPTION_MAP_UNWRAP_OR, REDUNDANT_STATIC_LIFETIMES, FILTER_MAP_NEXT, CHECKED_CONVERSIONS, MANUAL_RANGE_CONTAINS, USE_SELF, MEM_REPLACE_WITH_DEFAULT, MANUAL_NON_EXHAUSTIVE, OPTION_AS_REF_DEREF, MAP_UNWRAP_OR, MATCH_LIKE_MATCHES_MACRO, MANUAL_STRIP, MISSING_CONST_FOR_FN, UNNESTED_OR_PATTERNS, FROM_OVER_INTO, PTR_AS_PTR, IF_THEN_SOME_ELSE_NONE, APPROX_CONSTANT, DEPRECATED_CFG_ATTR, INDEX_REFUTABLE_SLICE, MAP_CLONE, BORROW_AS_PTR, MANUAL_BITS, ERR_EXPECT, CAST_ABS_TO_UNSIGNED, UNINLINED_FORMAT_ARGS, MANUAL_CLAMP, MANUAL_LET_ELSE, UNCHECKED_DURATION_SUBTRACTION, COLLAPSIBLE_STR_REPLACE, SEEK_FROM_CURRENT, SEEK_REWIND, UNNECESSARY_LAZY_EVALUATIONS, TRANSMUTE_PTR_TO_REF, ALMOST_COMPLETE_RANGE, NEEDLESS_BORROW, DERIVABLE_IMPLS, MANUAL_IS_ASCII_CHECK, MANUAL_REM_EUCLID, MANUAL_RETAIN, TYPE_REPETITION_IN_BOUNDS, TUPLE_ARRAY_CONVERSIONS, MANUAL_TRY_FOLD, MANUAL_HASH_ONE, ITER_KV_MAP, MANUAL_C_STR_LITERALS.
///
/// The minimum rust version that the project supports. Defaults to the `rust-version` field in `Cargo.toml`
#[default_text = ""]
@ -567,6 +567,26 @@ define_Conf! {
/// Lint "public" fields in a struct that are prefixed with an underscore based on their
/// exported visibility, or whether they are marked as "pub".
(pub_underscore_fields_behavior: PubUnderscoreFieldsBehaviour = PubUnderscoreFieldsBehaviour::PubliclyExported),
/// Lint: MODULO_ARITHMETIC.
///
/// Don't lint when comparing the result of a modulo operation to zero.
(allow_comparison_to_zero: bool = true),
/// Lint: WILDCARD_IMPORTS.
///
/// List of path segments allowed to have wildcard imports.
///
/// #### Example
///
/// ```toml
/// allowed-wildcard-imports = [ "utils", "common" ]
/// ```
///
/// #### Noteworthy
///
/// 1. This configuration has no effects if used with `warn_on_all_wildcard_imports = true`.
/// 2. Paths with any segment that containing the word 'prelude'
/// are already allowed by default.
(allowed_wildcard_imports: FxHashSet<String> = FxHashSet::default()),
}
/// Search for the configuration file.

13
clippy_config/src/msrvs.rs
View file

@ -3,6 +3,7 @@ use rustc_semver::RustcVersion;
use rustc_session::Session;
use rustc_span::{sym, Symbol};
use serde::Deserialize;
use std::fmt;
macro_rules! msrv_aliases {
($($major:literal,$minor:literal,$patch:literal {
@ -16,6 +17,8 @@ macro_rules! msrv_aliases {
// names may refer to stabilized feature flags or library items
msrv_aliases! {
1,77,0 { C_STR_LITERALS }
1,76,0 { PTR_FROM_REF }
1,71,0 { TUPLE_ARRAY_CONVERSIONS, BUILD_HASHER_HASH_ONE }
1,70,0 { OPTION_RESULT_IS_VARIANT_AND, BINARY_HEAP_RETAIN }
1,68,0 { PATH_MAIN_SEPARATOR_STR }
@ -58,6 +61,16 @@ pub struct Msrv {
stack: Vec<RustcVersion>,
}
impl fmt::Display for Msrv {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if let Some(msrv) = self.current() {
write!(f, "{msrv}")
} else {
f.write_str("1.0.0")
}
}
}
impl<'de> Deserialize<'de> for Msrv {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where

2
clippy_lints/Cargo.toml
View file

@ -1,6 +1,6 @@
[package]
name = "clippy_lints"
version = "0.1.77"
version = "0.1.78"
description = "A bunch of helpful lints to avoid common pitfalls in Rust"
repository = "https://github.com/rust-lang/rust-clippy"
readme = "README.md"

1
clippy_lints/src/booleans.rs
View file

@ -499,6 +499,7 @@ struct NotSimplificationVisitor<'a, 'tcx> {
impl<'a, 'tcx> Visitor<'tcx> for NotSimplificationVisitor<'a, 'tcx> {
fn visit_expr(&mut self, expr: &'tcx Expr<'_>) {
if let ExprKind::Unary(UnOp::Not, inner) = &expr.kind
&& !expr.span.from_expansion()
&& !inner.span.from_expansion()
&& let Some(suggestion) = simplify_not(self.cx, inner)
&& self.cx.tcx.lint_level_at_node(NONMINIMAL_BOOL, expr.hir_id).0 != Level::Allow

168
clippy_lints/src/cargo/lint_groups_priority.rs Normal file
View file

@ -0,0 +1,168 @@
use super::LINT_GROUPS_PRIORITY;
use clippy_utils::diagnostics::span_lint_and_then;
use rustc_data_structures::fx::FxHashSet;
use rustc_errors::Applicability;
use rustc_lint::{unerased_lint_store, LateContext};
use rustc_span::{BytePos, Pos, SourceFile, Span, SyntaxContext};
use serde::{Deserialize, Serialize};
use std::collections::BTreeMap;
use std::ops::Range;
use std::path::Path;
use toml::Spanned;
#[derive(Deserialize, Serialize, Debug)]
struct LintConfigTable {
level: String,
priority: Option<i64>,
}
#[derive(Deserialize, Debug)]
#[serde(untagged)]
enum LintConfig {
Level(String),
Table(LintConfigTable),
}
impl LintConfig {
fn level(&self) -> &str {
match self {
LintConfig::Level(level) => level,
LintConfig::Table(table) => &table.level,
}
}
fn priority(&self) -> i64 {
match self {
LintConfig::Level(_) => 0,
LintConfig::Table(table) => table.priority.unwrap_or(0),
}
}
fn is_implicit(&self) -> bool {
if let LintConfig::Table(table) = self {
table.priority.is_none()
} else {
true
}
}
}
type LintTable = BTreeMap<Spanned<String>, Spanned<LintConfig>>;
#[derive(Deserialize, Debug)]
struct Lints {
#[serde(default)]
rust: LintTable,
#[serde(default)]
clippy: LintTable,
}
#[derive(Deserialize, Debug)]
struct CargoToml {
lints: Lints,
}
#[derive(Default, Debug)]
struct LintsAndGroups {
lints: Vec<Spanned<String>>,
groups: Vec<(Spanned<String>, Spanned<LintConfig>)>,
}
fn toml_span(range: Range<usize>, file: &SourceFile) -> Span {
Span::new(
file.start_pos + BytePos::from_usize(range.start),
file.start_pos + BytePos::from_usize(range.end),
SyntaxContext::root(),
None,
)
}
fn check_table(cx: &LateContext<'_>, table: LintTable, groups: &FxHashSet<&str>, file: &SourceFile) {
let mut by_priority = BTreeMap::<_, LintsAndGroups>::new();
for (name, config) in table {
let lints_and_groups = by_priority.entry(config.as_ref().priority()).or_default();
if groups.contains(name.get_ref().as_str()) {
lints_and_groups.groups.push((name, config));
} else {
lints_and_groups.lints.push(name);
}
}
let low_priority = by_priority
.iter()
.find(|(_, lints_and_groups)| !lints_and_groups.lints.is_empty())
.map_or(-1, |(&lowest_lint_priority, _)| lowest_lint_priority - 1);
for (priority, LintsAndGroups { lints, groups }) in by_priority {
let Some(last_lint_alphabetically) = lints.last() else {
continue;
};
for (group, config) in groups {
span_lint_and_then(
cx,
LINT_GROUPS_PRIORITY,
toml_span(group.span(), file),
&format!(
"lint group `{}` has the same priority ({priority}) as a lint",
group.as_ref()
),
|diag| {
let config_span = toml_span(config.span(), file);
if config.as_ref().is_implicit() {
diag.span_label(config_span, "has an implicit priority of 0");
}
// add the label to next lint after this group that has the same priority
let lint = lints
.iter()
.filter(|lint| lint.span().start > group.span().start)
.min_by_key(|lint| lint.span().start)
.unwrap_or(last_lint_alphabetically);
diag.span_label(toml_span(lint.span(), file), "has the same priority as this lint");
diag.note("the order of the lints in the table is ignored by Cargo");
let mut suggestion = String::new();
Serialize::serialize(
&LintConfigTable {
level: config.as_ref().level().into(),
priority: Some(low_priority),
},
toml::ser::ValueSerializer::new(&mut suggestion),
)
.unwrap();
diag.span_suggestion_verbose(
config_span,
format!(
"to have lints override the group set `{}` to a lower priority",
group.as_ref()
),
suggestion,
Applicability::MaybeIncorrect,
);
},
);
}
}
}
pub fn check(cx: &LateContext<'_>) {
if let Ok(file) = cx.tcx.sess.source_map().load_file(Path::new("Cargo.toml"))
&& let Some(src) = file.src.as_deref()
&& let Ok(cargo_toml) = toml::from_str::<CargoToml>(src)
{
let mut rustc_groups = FxHashSet::default();
let mut clippy_groups = FxHashSet::default();
for (group, ..) in unerased_lint_store(cx.tcx.sess).get_lint_groups() {
match group.split_once("::") {
None => {
rustc_groups.insert(group);
},
Some(("clippy", group)) => {
clippy_groups.insert(group);
},
_ => {},
}
}
check_table(cx, cargo_toml.lints.rust, &rustc_groups, &file);
check_table(cx, cargo_toml.lints.clippy, &clippy_groups, &file);
}
}

43
clippy_lints/src/cargo/mod.rs
View file

@ -1,5 +1,6 @@
mod common_metadata;
mod feature_name;
mod lint_groups_priority;
mod multiple_crate_versions;
mod wildcard_dependencies;
@ -165,6 +166,43 @@ declare_clippy_lint! {
"wildcard dependencies being used"
}
declare_clippy_lint! {
/// ### What it does
/// Checks for lint groups with the same priority as lints in the `Cargo.toml`
/// [`[lints]` table](https://doc.rust-lang.org/cargo/reference/manifest.html#the-lints-section).
///
/// This lint will be removed once [cargo#12918](https://github.com/rust-lang/cargo/issues/12918)
/// is resolved.
///
/// ### Why is this bad?
/// The order of lints in the `[lints]` is ignored, to have a lint override a group the
/// `priority` field needs to be used, otherwise the sort order is undefined.
///
/// ### Known problems
/// Does not check lints inherited using `lints.workspace = true`
///
/// ### Example
/// ```toml
/// # Passed as `--allow=clippy::similar_names --warn=clippy::pedantic`
/// # which results in `similar_names` being `warn`
/// [lints.clippy]
/// pedantic = "warn"
/// similar_names = "allow"
/// ```
/// Use instead:
/// ```toml
/// # Passed as `--warn=clippy::pedantic --allow=clippy::similar_names`
/// # which results in `similar_names` being `allow`
/// [lints.clippy]
/// pedantic = { level = "warn", priority = -1 }
/// similar_names = "allow"
/// ```
#[clippy::version = "1.76.0"]
pub LINT_GROUPS_PRIORITY,
correctness,
"a lint group in `Cargo.toml` at the same priority as a lint"
}
pub struct Cargo {
pub allowed_duplicate_crates: FxHashSet<String>,
pub ignore_publish: bool,
@ -175,7 +213,8 @@ impl_lint_pass!(Cargo => [
REDUNDANT_FEATURE_NAMES,
NEGATIVE_FEATURE_NAMES,
MULTIPLE_CRATE_VERSIONS,
WILDCARD_DEPENDENCIES
WILDCARD_DEPENDENCIES,
LINT_GROUPS_PRIORITY,
]);
impl LateLintPass<'_> for Cargo {
@ -188,6 +227,8 @@ impl LateLintPass<'_> for Cargo {
];
static WITH_DEPS_LINTS: &[&Lint] = &[MULTIPLE_CRATE_VERSIONS];
lint_groups_priority::check(cx);
if !NO_DEPS_LINTS
.iter()
.all(|&lint| is_lint_allowed(cx, lint, CRATE_HIR_ID))

30
clippy_lints/src/casts/mod.rs
View file

@ -18,6 +18,7 @@ mod fn_to_numeric_cast_any;
mod fn_to_numeric_cast_with_truncation;
mod ptr_as_ptr;
mod ptr_cast_constness;
mod ref_as_ptr;
mod unnecessary_cast;
mod utils;
mod zero_ptr;
@ -689,6 +690,30 @@ declare_clippy_lint! {
"using `0 as *{const, mut} T`"
}
declare_clippy_lint! {
/// ### What it does
/// Checks for casts of references to pointer using `as`
/// and suggests `std::ptr::from_ref` and `std::ptr::from_mut` instead.
///
/// ### Why is this bad?
/// Using `as` casts may result in silently changing mutability or type.
///
/// ### Example
/// ```no_run
/// let a_ref = &1;
/// let a_ptr = a_ref as *const _;
/// ```
/// Use instead:
/// ```no_run
/// let a_ref = &1;
/// let a_ptr = std::ptr::from_ref(a_ref);
/// ```
#[clippy::version = "1.77.0"]
pub REF_AS_PTR,
pedantic,
"using `as` to cast a reference to pointer"
}
pub struct Casts {
msrv: Msrv,
}
@ -724,6 +749,7 @@ impl_lint_pass!(Casts => [
AS_PTR_CAST_MUT,
CAST_NAN_TO_INT,
ZERO_PTR,
REF_AS_PTR,
]);
impl<'tcx> LateLintPass<'tcx> for Casts {
@ -771,7 +797,9 @@ impl<'tcx> LateLintPass<'tcx> for Casts {
as_underscore::check(cx, expr, cast_to_hir);
if self.msrv.meets(msrvs::BORROW_AS_PTR) {
if self.msrv.meets(msrvs::PTR_FROM_REF) {
ref_as_ptr::check(cx, expr, cast_expr, cast_to_hir);
} else if self.msrv.meets(msrvs::BORROW_AS_PTR) {
borrow_as_ptr::check(cx, expr, cast_expr, cast_to_hir);
}
}

55
clippy_lints/src/casts/ref_as_ptr.rs Normal file
View file

@ -0,0 +1,55 @@
use clippy_utils::diagnostics::span_lint_and_sugg;
use clippy_utils::is_no_std_crate;
use clippy_utils::source::snippet_with_applicability;
use clippy_utils::sugg::Sugg;
use rustc_errors::Applicability;
use rustc_hir::{Expr, Mutability, Ty, TyKind};
use rustc_lint::LateContext;
use rustc_middle::ty::{self, TypeAndMut};
use super::REF_AS_PTR;
pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>, cast_to_hir_ty: &Ty<'_>) {
let (cast_from, cast_to) = (
cx.typeck_results().expr_ty(cast_expr),
cx.typeck_results().expr_ty(expr),
);
if matches!(cast_from.kind(), ty::Ref(..))
&& let ty::RawPtr(TypeAndMut { mutbl: to_mutbl, .. }) = cast_to.kind()
{
let core_or_std = if is_no_std_crate(cx) { "core" } else { "std" };
let fn_name = match to_mutbl {
Mutability::Not => "from_ref",
Mutability::Mut => "from_mut",
};
let mut app = Applicability::MachineApplicable;
let turbofish = match &cast_to_hir_ty.kind {
TyKind::Infer => String::new(),
TyKind::Ptr(mut_ty) => {
if matches!(mut_ty.ty.kind, TyKind::Infer) {
String::new()
} else {
format!(
"::<{}>",
snippet_with_applicability(cx, mut_ty.ty.span, "/* type */", &mut app)
)
}
},
_ => return,
};
let cast_expr_sugg = Sugg::hir_with_applicability(cx, cast_expr, "_", &mut app);
span_lint_and_sugg(
cx,
REF_AS_PTR,
expr.span,
"reference as raw pointer",
"try",
format!("{core_or_std}::ptr::{fn_name}{turbofish}({cast_expr_sugg})"),
app,
);
}
}

6
clippy_lints/src/declared_lints.rs
View file

@ -71,6 +71,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
crate::borrow_deref_ref::BORROW_DEREF_REF_INFO,
crate::box_default::BOX_DEFAULT_INFO,
crate::cargo::CARGO_COMMON_METADATA_INFO,
crate::cargo::LINT_GROUPS_PRIORITY_INFO,
crate::cargo::MULTIPLE_CRATE_VERSIONS_INFO,
crate::cargo::NEGATIVE_FEATURE_NAMES_INFO,
crate::cargo::REDUNDANT_FEATURE_NAMES_INFO,
@ -96,6 +97,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
crate::casts::FN_TO_NUMERIC_CAST_WITH_TRUNCATION_INFO,
crate::casts::PTR_AS_PTR_INFO,
crate::casts::PTR_CAST_CONSTNESS_INFO,
crate::casts::REF_AS_PTR_INFO,
crate::casts::UNNECESSARY_CAST_INFO,
crate::casts::ZERO_PTR_INFO,
crate::checked_conversions::CHECKED_CONVERSIONS_INFO,
@ -212,6 +214,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
crate::implicit_saturating_add::IMPLICIT_SATURATING_ADD_INFO,
crate::implicit_saturating_sub::IMPLICIT_SATURATING_SUB_INFO,
crate::implied_bounds_in_impls::IMPLIED_BOUNDS_IN_IMPLS_INFO,
crate::incompatible_msrv::INCOMPATIBLE_MSRV_INFO,
crate::inconsistent_struct_constructor::INCONSISTENT_STRUCT_CONSTRUCTOR_INFO,
crate::index_refutable_slice::INDEX_REFUTABLE_SLICE_INFO,
crate::indexing_slicing::INDEXING_SLICING_INFO,
@ -384,6 +387,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
crate::methods::ITER_SKIP_ZERO_INFO,
crate::methods::ITER_WITH_DRAIN_INFO,
crate::methods::JOIN_ABSOLUTE_PATHS_INFO,
crate::methods::MANUAL_C_STR_LITERALS_INFO,
crate::methods::MANUAL_FILTER_MAP_INFO,
crate::methods::MANUAL_FIND_MAP_INFO,
crate::methods::MANUAL_IS_VARIANT_AND_INFO,
@ -452,6 +456,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
crate::methods::UNNECESSARY_JOIN_INFO,
crate::methods::UNNECESSARY_LAZY_EVALUATIONS_INFO,
crate::methods::UNNECESSARY_LITERAL_UNWRAP_INFO,
crate::methods::UNNECESSARY_RESULT_MAP_OR_ELSE_INFO,
crate::methods::UNNECESSARY_SORT_BY_INFO,
crate::methods::UNNECESSARY_TO_OWNED_INFO,
crate::methods::UNWRAP_OR_DEFAULT_INFO,
@ -656,6 +661,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
crate::tests_outside_test_module::TESTS_OUTSIDE_TEST_MODULE_INFO,
crate::thread_local_initializer_can_be_made_const::THREAD_LOCAL_INITIALIZER_CAN_BE_MADE_CONST_INFO,
crate::to_digit_is_some::TO_DIGIT_IS_SOME_INFO,
crate::to_string_trait_impl::TO_STRING_TRAIT_IMPL_INFO,
crate::trailing_empty_array::TRAILING_EMPTY_ARRAY_INFO,
crate::trait_bounds::TRAIT_DUPLICATION_IN_BOUNDS_INFO,
crate::trait_bounds::TYPE_REPETITION_IN_BOUNDS_INFO,

2
clippy_lints/src/doc/mod.rs
View file

@ -226,7 +226,7 @@ declare_clippy_lint! {
/// unimplemented!();
/// }
/// ```
#[clippy::version = "1.40.0"]
#[clippy::version = "1.76.0"]
pub TEST_ATTR_IN_DOCTEST,
suspicious,
"presence of `#[test]` in code examples"

50
clippy_lints/src/eta_reduction.rs
View file

@ -3,15 +3,14 @@ use clippy_utils::higher::VecArgs;
use clippy_utils::source::snippet_opt;
use clippy_utils::ty::type_diagnostic_name;
use clippy_utils::usage::{local_used_after_expr, local_used_in};
use clippy_utils::{higher, is_adjusted, path_to_local, path_to_local_id};
use clippy_utils::{get_path_from_caller_to_method_type, higher, is_adjusted, path_to_local, path_to_local_id};
use rustc_errors::Applicability;
use rustc_hir::def_id::DefId;
use rustc_hir::{BindingAnnotation, Expr, ExprKind, FnRetTy, Param, PatKind, QPath, TyKind, Unsafety};
use rustc_infer::infer::TyCtxtInferExt;
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::ty::{
self, Binder, ClosureArgs, ClosureKind, EarlyBinder, FnSig, GenericArg, GenericArgKind, GenericArgsRef,
ImplPolarity, List, Region, RegionKind, Ty, TypeVisitableExt, TypeckResults,
self, Binder, ClosureArgs, ClosureKind, FnSig, GenericArg, GenericArgKind, ImplPolarity, List, Region, RegionKind,
Ty, TypeVisitableExt, TypeckResults,
};
use rustc_session::declare_lint_pass;
use rustc_span::symbol::sym;
@ -21,8 +20,8 @@ use rustc_trait_selection::traits::error_reporting::InferCtxtExt as _;
declare_clippy_lint! {
/// ### What it does
/// Checks for closures which just call another function where
/// the function can be called directly. `unsafe` functions or calls where types
/// get adjusted are ignored.
/// the function can be called directly. `unsafe` functions, calls where types
/// get adjusted or where the callee is marked `#[track_caller]` are ignored.
///
/// ### Why is this bad?
/// Needlessly creating a closure adds code for no benefit
@ -136,7 +135,14 @@ impl<'tcx> LateLintPass<'tcx> for EtaReduction {
.map_or(callee_ty, |a| a.target.peel_refs());
let sig = match callee_ty_adjusted.kind() {
ty::FnDef(def, _) => cx.tcx.fn_sig(def).skip_binder().skip_binder(),
ty::FnDef(def, _) => {
// Rewriting `x(|| f())` to `x(f)` where f is marked `#[track_caller]` moves the `Location`
if cx.tcx.has_attr(*def, sym::track_caller) {
return;
}
cx.tcx.fn_sig(def).skip_binder().skip_binder()
},
ty::FnPtr(sig) => sig.skip_binder(),
ty::Closure(_, subs) => cx
.tcx
@ -186,6 +192,7 @@ impl<'tcx> LateLintPass<'tcx> for EtaReduction {
},
ExprKind::MethodCall(path, self_, args, _) if check_inputs(typeck, body.params, Some(self_), args) => {
if let Some(method_def_id) = typeck.type_dependent_def_id(body.value.hir_id)
&& !cx.tcx.has_attr(method_def_id, sym::track_caller)
&& check_sig(cx, closure, cx.tcx.fn_sig(method_def_id).skip_binder().skip_binder())
{
span_lint_and_then(
@ -195,11 +202,12 @@ impl<'tcx> LateLintPass<'tcx> for EtaReduction {
"redundant closure",
|diag| {
let args = typeck.node_args(body.value.hir_id);
let name = get_ufcs_type_name(cx, method_def_id, args);
let caller = self_.hir_id.owner.def_id;
let type_name = get_path_from_caller_to_method_type(cx.tcx, caller, method_def_id, args);
diag.span_suggestion(
expr.span,
"replace the closure with the method itself",
format!("{}::{}", name, path.ident.name),
format!("{}::{}", type_name, path.ident.name),
Applicability::MachineApplicable,
);
},
@ -301,27 +309,3 @@ fn has_late_bound_to_non_late_bound_regions(from_sig: FnSig<'_>, to_sig: FnSig<'
.zip(to_sig.inputs_and_output)
.any(|(from_ty, to_ty)| check_ty(from_ty, to_ty))
}
fn get_ufcs_type_name<'tcx>(cx: &LateContext<'tcx>, method_def_id: DefId, args: GenericArgsRef<'tcx>) -> String {
let assoc_item = cx.tcx.associated_item(method_def_id);
let def_id = assoc_item.container_id(cx.tcx);
match assoc_item.container {
ty::TraitContainer => cx.tcx.def_path_str(def_id),
ty::ImplContainer => {
let ty = cx.tcx.type_of(def_id).instantiate_identity();
match ty.kind() {
ty::Adt(adt, _) => cx.tcx.def_path_str(adt.did()),
ty::Array(..)
| ty::Dynamic(..)
| ty::Never
| ty::RawPtr(_)
| ty::Ref(..)
| ty::Slice(_)
| ty::Tuple(_) => {
format!("<{}>", EarlyBinder::bind(ty).instantiate(cx.tcx, args))
},
_ => ty.to_string(),
}
},
}
}

133
clippy_lints/src/incompatible_msrv.rs Normal file
View file

@ -0,0 +1,133 @@
use clippy_config::msrvs::Msrv;
use clippy_utils::diagnostics::span_lint;
use rustc_attr::{StabilityLevel, StableSince};
use rustc_data_structures::fx::FxHashMap;
use rustc_hir::{Expr, ExprKind};
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::ty::TyCtxt;
use rustc_semver::RustcVersion;
use rustc_session::impl_lint_pass;
use rustc_span::def_id::DefId;
use rustc_span::Span;
declare_clippy_lint! {
/// ### What it does
///
/// This lint checks that no function newer than the defined MSRV (minimum
/// supported rust version) is used in the crate.
///
/// ### Why is this bad?
///
/// It would prevent the crate to be actually used with the specified MSRV.
///
/// ### Example
/// ```no_run
/// // MSRV of 1.3.0
/// use std::thread::sleep;
/// use std::time::Duration;
///
/// // Sleep was defined in `1.4.0`.
/// sleep(Duration::new(1, 0));
/// ```
///
/// To fix this problem, either increase your MSRV or use another item
/// available in your current MSRV.
#[clippy::version = "1.77.0"]
pub INCOMPATIBLE_MSRV,
suspicious,
"ensures that all items used in the crate are available for the current MSRV"
}
pub struct IncompatibleMsrv {
msrv: Msrv,
is_above_msrv: FxHashMap<DefId, RustcVersion>,
}
impl_lint_pass!(IncompatibleMsrv => [INCOMPATIBLE_MSRV]);
impl IncompatibleMsrv {
pub fn new(msrv: Msrv) -> Self {
Self {
msrv,
is_above_msrv: FxHashMap::default(),
}
}
#[allow(clippy::cast_lossless)]
fn get_def_id_version(&mut self, tcx: TyCtxt<'_>, def_id: DefId) -> RustcVersion {
if let Some(version) = self.is_above_msrv.get(&def_id) {
return *version;
}
let version = if let Some(version) = tcx
.lookup_stability(def_id)
.and_then(|stability| match stability.level {
StabilityLevel::Stable {
since: StableSince::Version(version),
..
} => Some(RustcVersion::new(
version.major as _,
version.minor as _,
version.patch as _,
)),
_ => None,
}) {
version
} else if let Some(parent_def_id) = tcx.opt_parent(def_id) {
self.get_def_id_version(tcx, parent_def_id)
} else {
RustcVersion::new(1, 0, 0)
};
self.is_above_msrv.insert(def_id, version);
version
}
fn emit_lint_if_under_msrv(&mut self, cx: &LateContext<'_>, def_id: DefId, span: Span) {
if def_id.is_local() {
// We don't check local items since their MSRV is supposed to always be valid.
return;
}
let version = self.get_def_id_version(cx.tcx, def_id);
if self.msrv.meets(version) {
return;
}
self.emit_lint_for(cx, span, version);
}
fn emit_lint_for(&self, cx: &LateContext<'_>, span: Span, version: RustcVersion) {
span_lint(
cx,
INCOMPATIBLE_MSRV,
span,
&format!(
"current MSRV (Minimum Supported Rust Version) is `{}` but this item is stable since `{version}`",
self.msrv
),
);
}
}
impl<'tcx> LateLintPass<'tcx> for IncompatibleMsrv {
extract_msrv_attr!(LateContext);
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) {
if self.msrv.current().is_none() {
// If there is no MSRV, then no need to check anything...
return;
}
match expr.kind {
ExprKind::MethodCall(_, _, _, span) => {
if let Some(method_did) = cx.typeck_results().type_dependent_def_id(expr.hir_id) {
self.emit_lint_if_under_msrv(cx, method_did, span);
}
},
ExprKind::Call(call, [_]) => {
if let ExprKind::Path(qpath) = call.kind
&& let Some(path_def_id) = cx.qpath_res(&qpath, call.hir_id).opt_def_id()
{
self.emit_lint_if_under_msrv(cx, path_def_id, call.span);
}
},
_ => {},
}
}
}

2
clippy_lints/src/iter_over_hash_type.rs
View file

@ -34,7 +34,7 @@ declare_clippy_lint! {
/// let value = &my_map[key];
/// }
/// ```
#[clippy::version = "1.75.0"]
#[clippy::version = "1.76.0"]
pub ITER_OVER_HASH_TYPE,
restriction,
"iterating over unordered hash-based types (`HashMap` and `HashSet`)"

21
clippy_lints/src/lib.rs
View file

@ -26,6 +26,7 @@ extern crate rustc_abi;
extern crate rustc_arena;
extern crate rustc_ast;
extern crate rustc_ast_pretty;
extern crate rustc_attr;
extern crate rustc_data_structures;
extern crate rustc_driver;
extern crate rustc_errors;
@ -153,6 +154,7 @@ mod implicit_return;
mod implicit_saturating_add;
mod implicit_saturating_sub;
mod implied_bounds_in_impls;
mod incompatible_msrv;
mod inconsistent_struct_constructor;
mod index_refutable_slice;
mod indexing_slicing;
@ -325,6 +327,7 @@ mod temporary_assignment;
mod tests_outside_test_module;
mod thread_local_initializer_can_be_made_const;
mod to_digit_is_some;
mod to_string_trait_impl;
mod trailing_empty_array;
mod trait_bounds;
mod transmute;
@ -521,6 +524,7 @@ pub fn register_lints(store: &mut rustc_lint::LintStore, conf: &'static Conf) {
ref allowed_dotfiles,
ref allowed_idents_below_min_chars,
ref allowed_scripts,
ref allowed_wildcard_imports,
ref arithmetic_side_effects_allowed_binary,
ref arithmetic_side_effects_allowed_unary,
ref arithmetic_side_effects_allowed,
@ -575,6 +579,7 @@ pub fn register_lints(store: &mut rustc_lint::LintStore, conf: &'static Conf) {
check_private_items,
pub_underscore_fields_behavior,
ref allowed_duplicate_crates,
allow_comparison_to_zero,
blacklisted_names: _,
cyclomatic_complexity_threshold: _,
@ -872,7 +877,12 @@ pub fn register_lints(store: &mut rustc_lint::LintStore, conf: &'static Conf) {
))
});
store.register_early_pass(|| Box::new(option_env_unwrap::OptionEnvUnwrap));
store.register_late_pass(move |_| Box::new(wildcard_imports::WildcardImports::new(warn_on_all_wildcard_imports)));
store.register_late_pass(move |_| {
Box::new(wildcard_imports::WildcardImports::new(
warn_on_all_wildcard_imports,
allowed_wildcard_imports.clone(),
))
});
store.register_late_pass(|_| Box::<redundant_pub_crate::RedundantPubCrate>::default());
store.register_late_pass(|_| Box::new(unnamed_address::UnnamedAddress));
store.register_late_pass(|_| Box::<dereference::Dereferencing<'_>>::default());
@ -968,7 +978,12 @@ pub fn register_lints(store: &mut rustc_lint::LintStore, conf: &'static Conf) {
store.register_late_pass(|_| Box::new(default_instead_of_iter_empty::DefaultIterEmpty));
store.register_late_pass(move |_| Box::new(manual_rem_euclid::ManualRemEuclid::new(msrv())));
store.register_late_pass(move |_| Box::new(manual_retain::ManualRetain::new(msrv())));
store.register_late_pass(move |_| Box::new(operators::Operators::new(verbose_bit_mask_threshold)));
store.register_late_pass(move |_| {
Box::new(operators::Operators::new(
verbose_bit_mask_threshold,
allow_comparison_to_zero,
))
});
store.register_late_pass(|_| Box::<std_instead_of_core::StdReexports>::default());
store.register_late_pass(move |_| Box::new(instant_subtraction::InstantSubtraction::new(msrv())));
store.register_late_pass(|_| Box::new(partialeq_to_none::PartialeqToNone));
@ -1094,6 +1109,8 @@ pub fn register_lints(store: &mut rustc_lint::LintStore, conf: &'static Conf) {
store.register_late_pass(move |_| {
Box::new(thread_local_initializer_can_be_made_const::ThreadLocalInitializerCanBeMadeConst::new(msrv()))
});
store.register_late_pass(move |_| Box::new(incompatible_msrv::IncompatibleMsrv::new(msrv())));
store.register_late_pass(|_| Box::new(to_string_trait_impl::ToStringTraitImpl));
// add lints here, do not remove this comment, it's used in `new_lint`
}

2
clippy_lints/src/loops/mod.rs
View file

@ -672,7 +672,7 @@ declare_clippy_lint! {
/// }
/// }
/// ```
#[clippy::version = "1.75.0"]
#[clippy::version = "1.76.0"]
pub INFINITE_LOOP,
restriction,
"possibly unintended infinite loop"

6
clippy_lints/src/loops/never_loop.rs
View file

@ -201,12 +201,12 @@ fn never_loop_expr<'tcx>(
})
})
},
ExprKind::Block(b, l) => {
if l.is_some() {
ExprKind::Block(b, _) => {
if b.targeted_by_break {
local_labels.push((b.hir_id, false));
}
let ret = never_loop_block(cx, b, local_labels, main_loop_id);
let jumped_to = l.is_some() && local_labels.pop().unwrap().1;
let jumped_to = b.targeted_by_break && local_labels.pop().unwrap().1;
match ret {
NeverLoopResult::Diverging if jumped_to => NeverLoopResult::Normal,
_ => ret,

141
clippy_lints/src/manual_retain.rs
View file

@ -11,6 +11,7 @@ use rustc_lint::{LateContext, LateLintPass};
use rustc_semver::RustcVersion;
use rustc_session::impl_lint_pass;
use rustc_span::symbol::sym;
use rustc_span::Span;
const ACCEPTABLE_METHODS: [&[&str]; 5] = [
&paths::BINARYHEAP_ITER,
@ -28,6 +29,7 @@ const ACCEPTABLE_TYPES: [(rustc_span::Symbol, Option<RustcVersion>); 7] = [
(sym::Vec, None),
(sym::VecDeque, None),
];
const MAP_TYPES: [rustc_span::Symbol; 2] = [sym::BTreeMap, sym::HashMap];
declare_clippy_lint! {
/// ### What it does
@ -44,6 +46,7 @@ declare_clippy_lint! {
/// ```no_run
/// let mut vec = vec![0, 1, 2];
/// vec.retain(|x| x % 2 == 0);
/// vec.retain(|x| x % 2 == 0);
/// ```
#[clippy::version = "1.64.0"]
pub MANUAL_RETAIN,
@ -74,9 +77,9 @@ impl<'tcx> LateLintPass<'tcx> for ManualRetain {
&& let Some(collect_def_id) = cx.typeck_results().type_dependent_def_id(collect_expr.hir_id)
&& cx.tcx.is_diagnostic_item(sym::iterator_collect_fn, collect_def_id)
{
check_into_iter(cx, parent_expr, left_expr, target_expr, &self.msrv);
check_iter(cx, parent_expr, left_expr, target_expr, &self.msrv);
check_to_owned(cx, parent_expr, left_expr, target_expr, &self.msrv);
check_into_iter(cx, left_expr, target_expr, parent_expr.span, &self.msrv);
check_iter(cx, left_expr, target_expr, parent_expr.span, &self.msrv);
check_to_owned(cx, left_expr, target_expr, parent_expr.span, &self.msrv);
}
}
@ -85,9 +88,9 @@ impl<'tcx> LateLintPass<'tcx> for ManualRetain {
fn check_into_iter(
cx: &LateContext<'_>,
parent_expr: &hir::Expr<'_>,
left_expr: &hir::Expr<'_>,
target_expr: &hir::Expr<'_>,
parent_expr_span: Span,
msrv: &Msrv,
) {
if let hir::ExprKind::MethodCall(_, into_iter_expr, [_], _) = &target_expr.kind
@ -98,16 +101,39 @@ fn check_into_iter(
&& Some(into_iter_def_id) == cx.tcx.lang_items().into_iter_fn()
&& match_acceptable_type(cx, left_expr, msrv)
&& SpanlessEq::new(cx).eq_expr(left_expr, struct_expr)
&& let hir::ExprKind::MethodCall(_, _, [closure_expr], _) = target_expr.kind
&& let hir::ExprKind::Closure(closure) = closure_expr.kind
&& let filter_body = cx.tcx.hir().body(closure.body)
&& let [filter_params] = filter_body.params
{
suggest(cx, parent_expr, left_expr, target_expr);
if match_map_type(cx, left_expr) {
if let hir::PatKind::Tuple([key_pat, value_pat], _) = filter_params.pat.kind {
if let Some(sugg) = make_sugg(cx, key_pat, value_pat, left_expr, filter_body) {
make_span_lint_and_sugg(cx, parent_expr_span, sugg);
}
}
// Cannot lint other cases because `retain` requires two parameters
} else {
// Can always move because `retain` and `filter` have the same bound on the predicate
// for other types
make_span_lint_and_sugg(
cx,
parent_expr_span,
format!(
"{}.retain({})",
snippet(cx, left_expr.span, ".."),
snippet(cx, closure_expr.span, "..")
),
);
}
}
}
fn check_iter(
cx: &LateContext<'_>,
parent_expr: &hir::Expr<'_>,
left_expr: &hir::Expr<'_>,
target_expr: &hir::Expr<'_>,
parent_expr_span: Span,
msrv: &Msrv,
) {
if let hir::ExprKind::MethodCall(_, filter_expr, [], _) = &target_expr.kind
@ -122,16 +148,50 @@ fn check_iter(
&& match_acceptable_def_path(cx, iter_expr_def_id)
&& match_acceptable_type(cx, left_expr, msrv)
&& SpanlessEq::new(cx).eq_expr(left_expr, struct_expr)
&& let hir::ExprKind::MethodCall(_, _, [closure_expr], _) = filter_expr.kind
&& let hir::ExprKind::Closure(closure) = closure_expr.kind
&& let filter_body = cx.tcx.hir().body(closure.body)
&& let [filter_params] = filter_body.params
{
suggest(cx, parent_expr, left_expr, filter_expr);
match filter_params.pat.kind {
// hir::PatKind::Binding(_, _, _, None) => {
// // Be conservative now. Do nothing here.
// // TODO: Ideally, we can rewrite the lambda by stripping one level of reference
// },
hir::PatKind::Tuple([_, _], _) => {
// the `&&` reference for the `filter` method will be auto derefed to `ref`
// so, we can directly use the lambda
// https://doc.rust-lang.org/reference/patterns.html#binding-modes
make_span_lint_and_sugg(
cx,
parent_expr_span,
format!(
"{}.retain({})",
snippet(cx, left_expr.span, ".."),
snippet(cx, closure_expr.span, "..")
),
);
},
hir::PatKind::Ref(pat, _) => make_span_lint_and_sugg(
cx,
parent_expr_span,
format!(
"{}.retain(|{}| {})",
snippet(cx, left_expr.span, ".."),
snippet(cx, pat.span, ".."),
snippet(cx, filter_body.value.span, "..")
),
),
_ => {},
}
}
}
fn check_to_owned(
cx: &LateContext<'_>,
parent_expr: &hir::Expr<'_>,
left_expr: &hir::Expr<'_>,
target_expr: &hir::Expr<'_>,
parent_expr_span: Span,
msrv: &Msrv,
) {
if msrv.meets(msrvs::STRING_RETAIN)
@ -147,44 +207,26 @@ fn check_to_owned(
&& let ty = cx.typeck_results().expr_ty(str_expr).peel_refs()
&& is_type_lang_item(cx, ty, hir::LangItem::String)
&& SpanlessEq::new(cx).eq_expr(left_expr, str_expr)
{
suggest(cx, parent_expr, left_expr, filter_expr);
}
}
fn suggest(cx: &LateContext<'_>, parent_expr: &hir::Expr<'_>, left_expr: &hir::Expr<'_>, filter_expr: &hir::Expr<'_>) {
if let hir::ExprKind::MethodCall(_, _, [closure], _) = filter_expr.kind
&& let hir::ExprKind::Closure(&hir::Closure { body, .. }) = closure.kind
&& let filter_body = cx.tcx.hir().body(body)
&& let hir::ExprKind::MethodCall(_, _, [closure_expr], _) = filter_expr.kind
&& let hir::ExprKind::Closure(closure) = closure_expr.kind
&& let filter_body = cx.tcx.hir().body(closure.body)
&& let [filter_params] = filter_body.params
&& let Some(sugg) = match filter_params.pat.kind {
hir::PatKind::Binding(_, _, filter_param_ident, None) => Some(format!(
"{}.retain(|{filter_param_ident}| {})",
snippet(cx, left_expr.span, ".."),
snippet(cx, filter_body.value.span, "..")
)),
hir::PatKind::Tuple([key_pat, value_pat], _) => make_sugg(cx, key_pat, value_pat, left_expr, filter_body),
hir::PatKind::Ref(pat, _) => match pat.kind {
hir::PatKind::Binding(_, _, filter_param_ident, None) => Some(format!(
"{}.retain(|{filter_param_ident}| {})",
snippet(cx, left_expr.span, ".."),
snippet(cx, filter_body.value.span, "..")
)),
_ => None,
},
_ => None,
}
{
span_lint_and_sugg(
if let hir::PatKind::Ref(pat, _) = filter_params.pat.kind {
make_span_lint_and_sugg(
cx,
MANUAL_RETAIN,
parent_expr.span,
"this expression can be written more simply using `.retain()`",
"consider calling `.retain()` instead",
sugg,
Applicability::MachineApplicable,
parent_expr_span,
format!(
"{}.retain(|{}| {})",
snippet(cx, left_expr.span, ".."),
snippet(cx, pat.span, ".."),
snippet(cx, filter_body.value.span, "..")
),
);
}
// Be conservative now. Do nothing for the `Binding` case.
// TODO: Ideally, we can rewrite the lambda by stripping one level of reference
}
}
fn make_sugg(
@ -229,3 +271,20 @@ fn match_acceptable_type(cx: &LateContext<'_>, expr: &hir::Expr<'_>, msrv: &Msrv
&& acceptable_msrv.map_or(true, |acceptable_msrv| msrv.meets(acceptable_msrv))
})
}
fn match_map_type(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> bool {
let expr_ty = cx.typeck_results().expr_ty(expr).peel_refs();
MAP_TYPES.iter().any(|ty| is_type_diagnostic_item(cx, expr_ty, *ty))
}
fn make_span_lint_and_sugg(cx: &LateContext<'_>, span: Span, sugg: String) {
span_lint_and_sugg(
cx,
MANUAL_RETAIN,
span,
"this expression can be written more simply using `.retain()`",
"consider calling `.retain()` instead",
sugg,
Applicability::MachineApplicable,
);
}

197
clippy_lints/src/methods/manual_c_str_literals.rs Normal file
View file

@ -0,0 +1,197 @@
use clippy_config::msrvs::{self, Msrv};
use clippy_utils::diagnostics::span_lint_and_sugg;
use clippy_utils::get_parent_expr;
use clippy_utils::source::snippet;
use rustc_ast::{LitKind, StrStyle};
use rustc_errors::Applicability;
use rustc_hir::{Expr, ExprKind, Node, QPath, TyKind};
use rustc_lint::LateContext;
use rustc_span::{sym, Span, Symbol};
use super::MANUAL_C_STR_LITERALS;
/// Checks:
/// - `b"...".as_ptr()`
/// - `b"...".as_ptr().cast()`
/// - `"...".as_ptr()`
/// - `"...".as_ptr().cast()`
///
/// Iff the parent call of `.cast()` isn't `CStr::from_ptr`, to avoid linting twice.
pub(super) fn check_as_ptr<'tcx>(
cx: &LateContext<'tcx>,
expr: &'tcx Expr<'tcx>,
receiver: &'tcx Expr<'tcx>,
msrv: &Msrv,
) {
if let ExprKind::Lit(lit) = receiver.kind
&& let LitKind::ByteStr(_, StrStyle::Cooked) | LitKind::Str(_, StrStyle::Cooked) = lit.node
&& let casts_removed = peel_ptr_cast_ancestors(cx, expr)
&& !get_parent_expr(cx, casts_removed).is_some_and(
|parent| matches!(parent.kind, ExprKind::Call(func, _) if is_c_str_function(cx, func).is_some()),
)
&& let Some(sugg) = rewrite_as_cstr(cx, lit.span)
&& msrv.meets(msrvs::C_STR_LITERALS)
{
span_lint_and_sugg(
cx,
MANUAL_C_STR_LITERALS,
receiver.span,
"manually constructing a nul-terminated string",
r#"use a `c""` literal"#,
sugg,
// an additional cast may be needed, since the type of `CStr::as_ptr` and
// `"".as_ptr()` can differ and is platform dependent
Applicability::HasPlaceholders,
);
}
}
/// Checks if the callee is a "relevant" `CStr` function considered by this lint.
/// Returns the function name.
fn is_c_str_function(cx: &LateContext<'_>, func: &Expr<'_>) -> Option<Symbol> {
if let ExprKind::Path(QPath::TypeRelative(cstr, fn_name)) = &func.kind
&& let TyKind::Path(QPath::Resolved(_, ty_path)) = &cstr.kind
&& cx.tcx.lang_items().c_str() == ty_path.res.opt_def_id()
{
Some(fn_name.ident.name)
} else {
None
}
}
/// Checks calls to the `CStr` constructor functions:
/// - `CStr::from_bytes_with_nul(..)`
/// - `CStr::from_bytes_with_nul_unchecked(..)`
/// - `CStr::from_ptr(..)`
pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, func: &Expr<'_>, args: &[Expr<'_>], msrv: &Msrv) {
if let Some(fn_name) = is_c_str_function(cx, func)
&& let [arg] = args
&& msrv.meets(msrvs::C_STR_LITERALS)
{
match fn_name.as_str() {
name @ ("from_bytes_with_nul" | "from_bytes_with_nul_unchecked")
if !arg.span.from_expansion()
&& let ExprKind::Lit(lit) = arg.kind
&& let LitKind::ByteStr(_, StrStyle::Cooked) | LitKind::Str(_, StrStyle::Cooked) = lit.node =>
{
check_from_bytes(cx, expr, arg, name);
},
"from_ptr" => check_from_ptr(cx, expr, arg),
_ => {},
}
}
}
/// Checks `CStr::from_ptr(b"foo\0".as_ptr().cast())`
fn check_from_ptr(cx: &LateContext<'_>, expr: &Expr<'_>, arg: &Expr<'_>) {
if let ExprKind::MethodCall(method, lit, ..) = peel_ptr_cast(arg).kind
&& method.ident.name == sym::as_ptr
&& !lit.span.from_expansion()
&& let ExprKind::Lit(lit) = lit.kind
&& let LitKind::ByteStr(_, StrStyle::Cooked) = lit.node
&& let Some(sugg) = rewrite_as_cstr(cx, lit.span)
{
span_lint_and_sugg(
cx,
MANUAL_C_STR_LITERALS,
expr.span,
"calling `CStr::from_ptr` with a byte string literal",
r#"use a `c""` literal"#,
sugg,
Applicability::MachineApplicable,
);
}
}
/// Checks `CStr::from_bytes_with_nul(b"foo\0")`
fn check_from_bytes(cx: &LateContext<'_>, expr: &Expr<'_>, arg: &Expr<'_>, method: &str) {
let (span, applicability) = if let Some(parent) = get_parent_expr(cx, expr)
&& let ExprKind::MethodCall(method, ..) = parent.kind
&& [sym::unwrap, sym::expect].contains(&method.ident.name)
{
(parent.span, Applicability::MachineApplicable)
} else if method == "from_bytes_with_nul_unchecked" {
// `*_unchecked` returns `&CStr` directly, nothing needs to be changed
(expr.span, Applicability::MachineApplicable)
} else {
// User needs to remove error handling, can't be machine applicable
(expr.span, Applicability::HasPlaceholders)
};
let Some(sugg) = rewrite_as_cstr(cx, arg.span) else {
return;
};
span_lint_and_sugg(
cx,
MANUAL_C_STR_LITERALS,
span,
"calling `CStr::new` with a byte string literal",
r#"use a `c""` literal"#,
sugg,
applicability,
);
}
/// Rewrites a byte string literal to a c-str literal.
/// `b"foo\0"` -> `c"foo"`
///
/// Returns `None` if it doesn't end in a NUL byte.
fn rewrite_as_cstr(cx: &LateContext<'_>, span: Span) -> Option<String> {
let mut sugg = String::from("c") + snippet(cx, span.source_callsite(), "..").trim_start_matches('b');
// NUL byte should always be right before the closing quote.
if let Some(quote_pos) = sugg.rfind('"') {
// Possible values right before the quote:
// - literal NUL value
if sugg.as_bytes()[quote_pos - 1] == b'\0' {
sugg.remove(quote_pos - 1);
}
// - \x00
else if sugg[..quote_pos].ends_with("\\x00") {
sugg.replace_range(quote_pos - 4..quote_pos, "");
}
// - \0
else if sugg[..quote_pos].ends_with("\\0") {
sugg.replace_range(quote_pos - 2..quote_pos, "");
}
// No known suffix, so assume it's not a C-string.
else {
return None;
}
}
Some(sugg)
}
fn get_cast_target<'tcx>(e: &'tcx Expr<'tcx>) -> Option<&'tcx Expr<'tcx>> {
match &e.kind {
ExprKind::MethodCall(method, receiver, [], _) if method.ident.as_str() == "cast" => Some(receiver),
ExprKind::Cast(expr, _) => Some(expr),
_ => None,
}
}
/// `x.cast()` -> `x`
/// `x as *const _` -> `x`
/// `x` -> `x` (returns the same expression for non-cast exprs)
fn peel_ptr_cast<'tcx>(e: &'tcx Expr<'tcx>) -> &'tcx Expr<'tcx> {
get_cast_target(e).map_or(e, peel_ptr_cast)
}
/// Same as `peel_ptr_cast`, but the other way around, by walking up the ancestor cast expressions:
///
/// `foo(x.cast() as *const _)`
/// ^ given this `x` expression, returns the `foo(...)` expression
fn peel_ptr_cast_ancestors<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'tcx>) -> &'tcx Expr<'tcx> {
let mut prev = e;
for (_, node) in cx.tcx.hir().parent_iter(e.hir_id) {
if let Node::Expr(e) = node
&& get_cast_target(e).is_some()
{
prev = e;
} else {
break;
}
}
prev
}

2
clippy_lints/src/methods/map_unwrap_or.rs
View file

@ -21,7 +21,7 @@ pub(super) fn check<'tcx>(
unwrap_arg: &'tcx hir::Expr<'_>,
msrv: &Msrv,
) -> bool {
// lint if the caller of `map()` is an `Option`
// lint if the caller of `map()` is an `Option` or a `Result`.
let is_option = is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Option);
let is_result = is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result);

65
clippy_lints/src/methods/mod.rs
View file

@ -51,6 +51,7 @@ mod iter_skip_zero;
mod iter_with_drain;
mod iterator_step_by_zero;
mod join_absolute_paths;
mod manual_c_str_literals;
mod manual_is_variant_and;
mod manual_next_back;
mod manual_ok_or;
@ -113,6 +114,7 @@ mod unnecessary_iter_cloned;
mod unnecessary_join;
mod unnecessary_lazy_eval;
mod unnecessary_literal_unwrap;
mod unnecessary_result_map_or_else;
mod unnecessary_sort_by;
mod unnecessary_to_owned;
mod unwrap_expect_used;
@ -3951,6 +3953,64 @@ declare_clippy_lint! {
"cloning an `Option` via `as_ref().cloned()`"
}
declare_clippy_lint! {
/// ### What it does
/// Checks for usage of `.map_or_else()` "map closure" for `Result` type.
///
/// ### Why is this bad?
/// This can be written more concisely by using `unwrap_or_else()`.
///
/// ### Example
/// ```no_run
/// # fn handle_error(_: ()) -> u32 { 0 }
/// let x: Result<u32, ()> = Ok(0);
/// let y = x.map_or_else(|err| handle_error(err), |n| n);
/// ```
/// Use instead:
/// ```no_run
/// # fn handle_error(_: ()) -> u32 { 0 }
/// let x: Result<u32, ()> = Ok(0);
/// let y = x.unwrap_or_else(|err| handle_error(err));
/// ```
#[clippy::version = "1.77.0"]
pub UNNECESSARY_RESULT_MAP_OR_ELSE,
suspicious,
"making no use of the \"map closure\" when calling `.map_or_else(|err| handle_error(err), |n| n)`"
}
declare_clippy_lint! {
/// Checks for the manual creation of C strings (a string with a `NUL` byte at the end), either
/// through one of the `CStr` constructor functions, or more plainly by calling `.as_ptr()`
/// on a (byte) string literal with a hardcoded `\0` byte at the end.
///
/// ### Why is this bad?
/// This can be written more concisely using `c"str"` literals and is also less error-prone,
/// because the compiler checks for interior `NUL` bytes and the terminating `NUL` byte is inserted automatically.
///
/// ### Example
/// ```no_run
/// # use std::ffi::CStr;
/// # mod libc { pub unsafe fn puts(_: *const i8) {} }
/// fn needs_cstr(_: &CStr) {}
///
/// needs_cstr(CStr::from_bytes_with_nul(b"Hello\0").unwrap());
/// unsafe { libc::puts("World\0".as_ptr().cast()) }
/// ```
/// Use instead:
/// ```no_run
/// # use std::ffi::CStr;
/// # mod libc { pub unsafe fn puts(_: *const i8) {} }
/// fn needs_cstr(_: &CStr) {}
///
/// needs_cstr(c"Hello");
/// unsafe { libc::puts(c"World".as_ptr()) }
/// ```
#[clippy::version = "1.76.0"]
pub MANUAL_C_STR_LITERALS,
pedantic,
r#"creating a `CStr` through functions when `c""` literals can be used"#
}
pub struct Methods {
avoid_breaking_exported_api: bool,
msrv: Msrv,
@ -4109,6 +4169,8 @@ impl_lint_pass!(Methods => [
MANUAL_IS_VARIANT_AND,
STR_SPLIT_AT_NEWLINE,
OPTION_AS_REF_CLONED,
UNNECESSARY_RESULT_MAP_OR_ELSE,
MANUAL_C_STR_LITERALS,
]);
/// Extracts a method call name, args, and `Span` of the method name.
@ -4136,6 +4198,7 @@ impl<'tcx> LateLintPass<'tcx> for Methods {
hir::ExprKind::Call(func, args) => {
from_iter_instead_of_collect::check(cx, expr, args, func);
unnecessary_fallible_conversions::check_function(cx, expr, func);
manual_c_str_literals::check(cx, expr, func, args, &self.msrv);
},
hir::ExprKind::MethodCall(method_call, receiver, args, _) => {
let method_span = method_call.ident.span;
@ -4354,6 +4417,7 @@ impl Methods {
}
},
("as_mut", []) => useless_asref::check(cx, expr, "as_mut", recv),
("as_ptr", []) => manual_c_str_literals::check_as_ptr(cx, expr, recv, &self.msrv),
("as_ref", []) => useless_asref::check(cx, expr, "as_ref", recv),
("assume_init", []) => uninit_assumed_init::check(cx, expr, recv),
("cloned", []) => {
@ -4592,6 +4656,7 @@ impl Methods {
},
("map_or_else", [def, map]) => {
result_map_or_else_none::check(cx, expr, recv, def, map);
unnecessary_result_map_or_else::check(cx, expr, recv, def, map);
},
("next", []) => {
if let Some((name2, recv2, args2, _, _)) = method_call(recv) {

1
clippy_lints/src/methods/unnecessary_fold.rs
View file

@ -99,7 +99,6 @@ fn check_fold_with_op(
cx,
UNNECESSARY_FOLD,
fold_span.with_hi(expr.span.hi()),
// TODO #2371 don't suggest e.g., .any(|x| f(x)) if we can suggest .any(f)
"this `.fold` can be written more succinctly using another method",
"try",
sugg,

95
clippy_lints/src/methods/unnecessary_result_map_or_else.rs Normal file
View file

@ -0,0 +1,95 @@
use clippy_utils::diagnostics::span_lint_and_sugg;
use clippy_utils::peel_blocks;
use clippy_utils::source::snippet;
use clippy_utils::ty::is_type_diagnostic_item;
use rustc_errors::Applicability;
use rustc_hir as hir;
use rustc_hir::{Closure, Expr, ExprKind, HirId, QPath, Stmt, StmtKind};
use rustc_lint::LateContext;
use rustc_span::symbol::sym;
use super::UNNECESSARY_RESULT_MAP_OR_ELSE;
fn emit_lint(cx: &LateContext<'_>, expr: &Expr<'_>, recv: &Expr<'_>, def_arg: &Expr<'_>) {
let msg = "unused \"map closure\" when calling `Result::map_or_else` value";
let self_snippet = snippet(cx, recv.span, "..");
let err_snippet = snippet(cx, def_arg.span, "..");
span_lint_and_sugg(
cx,
UNNECESSARY_RESULT_MAP_OR_ELSE,
expr.span,
msg,
"consider using `unwrap_or_else`",
format!("{self_snippet}.unwrap_or_else({err_snippet})"),
Applicability::MachineApplicable,
);
}
fn get_last_chain_binding_hir_id(mut hir_id: HirId, statements: &[Stmt<'_>]) -> Option<HirId> {
for stmt in statements {
if let StmtKind::Local(local) = stmt.kind
&& let Some(init) = local.init
&& let ExprKind::Path(QPath::Resolved(_, path)) = init.kind
&& let hir::def::Res::Local(local_hir_id) = path.res
&& local_hir_id == hir_id
{
hir_id = local.pat.hir_id;
} else {
return None;
}
}
Some(hir_id)
}
fn handle_qpath(
cx: &LateContext<'_>,
expr: &Expr<'_>,
recv: &Expr<'_>,
def_arg: &Expr<'_>,
expected_hir_id: HirId,
qpath: QPath<'_>,
) {
if let QPath::Resolved(_, path) = qpath
&& let hir::def::Res::Local(hir_id) = path.res
&& expected_hir_id == hir_id
{
emit_lint(cx, expr, recv, def_arg);
}
}
/// lint use of `_.map_or_else(|err| err, |n| n)` for `Result`s.
pub(super) fn check<'tcx>(
cx: &LateContext<'tcx>,
expr: &'tcx Expr<'_>,
recv: &'tcx Expr<'_>,
def_arg: &'tcx Expr<'_>,
map_arg: &'tcx Expr<'_>,
) {
// lint if the caller of `map_or_else()` is a `Result`
if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(recv), sym::Result)
&& let ExprKind::Closure(&Closure { body, .. }) = map_arg.kind
&& let body = cx.tcx.hir().body(body)
&& let Some(first_param) = body.params.first()
{
let body_expr = peel_blocks(body.value);
match body_expr.kind {
ExprKind::Path(qpath) => {
handle_qpath(cx, expr, recv, def_arg, first_param.pat.hir_id, qpath);
},
// If this is a block (that wasn't peeled off), then it means there are statements.
ExprKind::Block(block, _) => {
if let Some(block_expr) = block.expr
// First we ensure that this is a "binding chain" (each statement is a binding
// of the previous one) and that it is a binding of the closure argument.
&& let Some(last_chain_binding_id) =
get_last_chain_binding_hir_id(first_param.pat.hir_id, block.stmts)
&& let ExprKind::Path(qpath) = block_expr.kind
{
handle_qpath(cx, expr, recv, def_arg, last_chain_binding_id, qpath);
}
},
_ => {},
}
}
}

2
clippy_lints/src/no_effect.rs
View file

@ -357,7 +357,7 @@ fn reduce_expression<'a>(cx: &LateContext<'_>, expr: &'a Expr<'a>) -> Option<Vec
}
},
ExprKind::Block(block, _) => {
if block.stmts.is_empty() {
if block.stmts.is_empty() && !block.targeted_by_break {
block.expr.as_ref().and_then(|e| {
match block.rules {
BlockCheckMode::UnsafeBlock(UnsafeSource::UserProvided) => None,

5
clippy_lints/src/only_used_in_recursion.rs
View file

@ -252,7 +252,7 @@ impl<'tcx> LateLintPass<'tcx> for OnlyUsedInRecursion {
{
(
trait_item_id,
FnKind::ImplTraitFn(cx.tcx.erase_regions(trait_ref.args) as *const _ as usize),
FnKind::ImplTraitFn(std::ptr::from_ref(cx.tcx.erase_regions(trait_ref.args)) as usize),
usize::from(sig.decl.implicit_self.has_implicit_self()),
)
} else {
@ -390,7 +390,6 @@ fn has_matching_args(kind: FnKind, args: GenericArgsRef<'_>) -> bool {
GenericArgKind::Type(ty) => matches!(*ty.kind(), ty::Param(ty) if ty.index as usize == idx),
GenericArgKind::Const(c) => matches!(c.kind(), ConstKind::Param(c) if c.index as usize == idx),
}),
#[allow(trivial_casts)]
FnKind::ImplTraitFn(expected_args) => args as *const _ as usize == expected_args,
FnKind::ImplTraitFn(expected_args) => std::ptr::from_ref(args) as usize == expected_args,
}
}

15
clippy_lints/src/operators/mod.rs
View file

@ -771,6 +771,7 @@ declare_clippy_lint! {
pub struct Operators {
arithmetic_context: numeric_arithmetic::Context,
verbose_bit_mask_threshold: u64,
modulo_arithmetic_allow_comparison_to_zero: bool,
}
impl_lint_pass!(Operators => [
ABSURD_EXTREME_COMPARISONS,
@ -801,10 +802,11 @@ impl_lint_pass!(Operators => [
SELF_ASSIGNMENT,
]);
impl Operators {
pub fn new(verbose_bit_mask_threshold: u64) -> Self {
pub fn new(verbose_bit_mask_threshold: u64, modulo_arithmetic_allow_comparison_to_zero: bool) -> Self {
Self {
arithmetic_context: numeric_arithmetic::Context::default(),
verbose_bit_mask_threshold,
modulo_arithmetic_allow_comparison_to_zero,
}
}
}
@ -835,12 +837,19 @@ impl<'tcx> LateLintPass<'tcx> for Operators {
cmp_owned::check(cx, op.node, lhs, rhs);
float_cmp::check(cx, e, op.node, lhs, rhs);
modulo_one::check(cx, e, op.node, rhs);
modulo_arithmetic::check(cx, e, op.node, lhs, rhs);
modulo_arithmetic::check(
cx,
e,
op.node,
lhs,
rhs,
self.modulo_arithmetic_allow_comparison_to_zero,
);
},
ExprKind::AssignOp(op, lhs, rhs) => {
self.arithmetic_context.check_binary(cx, e, op.node, lhs, rhs);
misrefactored_assign_op::check(cx, e, op.node, lhs, rhs);
modulo_arithmetic::check(cx, e, op.node, lhs, rhs);
modulo_arithmetic::check(cx, e, op.node, lhs, rhs, false);
},
ExprKind::Assign(lhs, rhs, _) => {
assign_op_pattern::check(cx, e, lhs, rhs);

27
clippy_lints/src/operators/modulo_arithmetic.rs
View file

@ -1,7 +1,7 @@
use clippy_utils::consts::{constant, Constant};
use clippy_utils::diagnostics::span_lint_and_then;
use clippy_utils::sext;
use rustc_hir::{BinOpKind, Expr};
use rustc_hir::{BinOpKind, Expr, ExprKind, Node};
use rustc_lint::LateContext;
use rustc_middle::ty::{self, Ty};
use std::fmt::Display;
@ -14,8 +14,13 @@ pub(super) fn check<'tcx>(
op: BinOpKind,
lhs: &'tcx Expr<'_>,
rhs: &'tcx Expr<'_>,
allow_comparison_to_zero: bool,
) {
if op == BinOpKind::Rem {
if allow_comparison_to_zero && used_in_comparison_with_zero(cx, e) {
return;
}
let lhs_operand = analyze_operand(lhs, cx, e);
let rhs_operand = analyze_operand(rhs, cx, e);
if let Some(lhs_operand) = lhs_operand
@ -28,6 +33,26 @@ pub(super) fn check<'tcx>(
};
}
fn used_in_comparison_with_zero(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
let Some(Node::Expr(parent_expr)) = cx.tcx.hir().find_parent(expr.hir_id) else {
return false;
};
let ExprKind::Binary(op, lhs, rhs) = parent_expr.kind else {
return false;
};
if op.node == BinOpKind::Eq || op.node == BinOpKind::Ne {
if let Some(Constant::Int(0)) = constant(cx, cx.typeck_results(), rhs) {
return true;
}
if let Some(Constant::Int(0)) = constant(cx, cx.typeck_results(), lhs) {
return true;
}
}
false
}
struct OperandInfo {
string_representation: Option<String>,
is_negative: bool,

14
clippy_lints/src/redundant_closure_call.rs
View file

@ -2,6 +2,7 @@ use crate::rustc_lint::LintContext;
use clippy_utils::diagnostics::{span_lint, span_lint_and_then};
use clippy_utils::get_parent_expr;
use clippy_utils::sugg::Sugg;
use hir::Param;
use rustc_errors::Applicability;
use rustc_hir as hir;
use rustc_hir::intravisit::{Visitor as HirVisitor, Visitor};
@ -13,6 +14,7 @@ use rustc_middle::hir::nested_filter;
use rustc_middle::lint::in_external_macro;
use rustc_middle::ty;
use rustc_session::declare_lint_pass;
use rustc_span::ExpnKind;
declare_clippy_lint! {
/// ### What it does
@ -89,7 +91,12 @@ fn find_innermost_closure<'tcx>(
cx: &LateContext<'tcx>,
mut expr: &'tcx hir::Expr<'tcx>,
mut steps: usize,
) -> Option<(&'tcx hir::Expr<'tcx>, &'tcx hir::FnDecl<'tcx>, ty::Asyncness)> {
) -> Option<(
&'tcx hir::Expr<'tcx>,
&'tcx hir::FnDecl<'tcx>,
ty::Asyncness,
&'tcx [Param<'tcx>],
)> {
let mut data = None;
while let hir::ExprKind::Closure(closure) = expr.kind
@ -110,6 +117,7 @@ fn find_innermost_closure<'tcx>(
} else {
ty::Asyncness::No
},
body.params,
));
steps -= 1;
}
@ -152,7 +160,9 @@ impl<'tcx> LateLintPass<'tcx> for RedundantClosureCall {
// without this check, we'd end up linting twice.
&& !matches!(recv.kind, hir::ExprKind::Call(..))
&& let (full_expr, call_depth) = get_parent_call_exprs(cx, expr)
&& let Some((body, fn_decl, coroutine_kind)) = find_innermost_closure(cx, recv, call_depth)
&& let Some((body, fn_decl, coroutine_kind, params)) = find_innermost_closure(cx, recv, call_depth)
// outside macros we lint properly. Inside macros, we lint only ||() style closures.
&& (!matches!(expr.span.ctxt().outer_expn_data().kind, ExpnKind::Macro(_, _)) || params.is_empty())
{
span_lint_and_then(
cx,

26
clippy_lints/src/redundant_locals.rs
View file

@ -4,8 +4,10 @@ use clippy_utils::ty::needs_ordered_drop;
use rustc_ast::Mutability;
use rustc_hir::def::Res;
use rustc_hir::{BindingAnnotation, ByRef, ExprKind, HirId, Local, Node, Pat, PatKind, QPath};
use rustc_hir_typeck::expr_use_visitor::PlaceBase;
use rustc_lint::{LateContext, LateLintPass, LintContext};
use rustc_middle::lint::in_external_macro;
use rustc_middle::ty::UpvarCapture;
use rustc_session::declare_lint_pass;
use rustc_span::symbol::Ident;
use rustc_span::DesugaringKind;
@ -69,6 +71,7 @@ impl<'tcx> LateLintPass<'tcx> for RedundantLocals {
// the local is user-controlled
&& !in_external_macro(cx.sess(), local.span)
&& !is_from_proc_macro(cx, expr)
&& !is_by_value_closure_capture(cx, local.hir_id, binding_id)
{
span_lint_and_help(
cx,
@ -82,6 +85,29 @@ impl<'tcx> LateLintPass<'tcx> for RedundantLocals {
}
}
/// Checks if the enclosing body is a closure and if the given local is captured by value.
///
/// In those cases, the redefinition may be necessary to force a move:
/// ```
/// fn assert_static<T: 'static>(_: T) {}
///
/// let v = String::new();
/// let closure = || {
/// let v = v; // <- removing this redefinition makes `closure` no longer `'static`
/// dbg!(&v);
/// };
/// assert_static(closure);
/// ```
fn is_by_value_closure_capture(cx: &LateContext<'_>, redefinition: HirId, root_variable: HirId) -> bool {
let closure_def_id = cx.tcx.hir().enclosing_body_owner(redefinition);
cx.tcx.is_closure_or_coroutine(closure_def_id.to_def_id())
&& cx.tcx.closure_captures(closure_def_id).iter().any(|c| {
matches!(c.info.capture_kind, UpvarCapture::ByValue)
&& matches!(c.place.base, PlaceBase::Upvar(upvar) if upvar.var_path.hir_id == root_variable)
})
}
/// Find the annotation of a binding introduced by a pattern, or `None` if it's not introduced.
fn find_binding(pat: &Pat<'_>, name: Ident) -> Option<BindingAnnotation> {
let mut ret = None;

11
clippy_lints/src/redundant_type_annotations.rs
View file

@ -188,7 +188,6 @@ impl LateLintPass<'_> for RedundantTypeAnnotations {
match init_lit.node {
// In these cases the annotation is redundant
LitKind::Str(..)
| LitKind::ByteStr(..)
| LitKind::Byte(..)
| LitKind::Char(..)
| LitKind::Bool(..)
@ -202,6 +201,16 @@ impl LateLintPass<'_> for RedundantTypeAnnotations {
}
},
LitKind::Err => (),
LitKind::ByteStr(..) => {
// We only lint if the type annotation is an array type (e.g. &[u8; 4]).
// If instead it is a slice (e.g. &[u8]) it may not be redundant, so we
// don't lint.
if let hir::TyKind::Ref(_, mut_ty) = ty.kind
&& matches!(mut_ty.ty.kind, hir::TyKind::Array(..))
{
span_lint(cx, REDUNDANT_TYPE_ANNOTATIONS, local.span, "redundant type annotation");
}
},
}
},
_ => (),

2
clippy_lints/src/repeat_vec_with_capacity.rs
View file

@ -42,7 +42,7 @@ declare_clippy_lint! {
/// // ^^^ this closure executes 123 times
/// // and the vecs will have the expected capacity
/// ```
#[clippy::version = "1.74.0"]
#[clippy::version = "1.76.0"]
pub REPEAT_VEC_WITH_CAPACITY,
suspicious,
"repeating a `Vec::with_capacity` expression which does not retain capacity"

31
clippy_lints/src/returns.rs
View file

@ -2,10 +2,14 @@ use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_and_then, span_lin
use clippy_utils::source::{snippet_opt, snippet_with_context};
use clippy_utils::sugg::has_enclosing_paren;
use clippy_utils::visitors::{for_each_expr_with_closures, Descend};
use clippy_utils::{fn_def_id, is_from_proc_macro, is_inside_let_else, path_to_local_id, span_find_starting_semi};
use clippy_utils::{
fn_def_id, is_from_proc_macro, is_inside_let_else, is_res_lang_ctor, path_res, path_to_local_id,
span_find_starting_semi,
};
use core::ops::ControlFlow;
use rustc_errors::Applicability;
use rustc_hir::intravisit::FnKind;
use rustc_hir::LangItem::ResultErr;
use rustc_hir::{
Block, Body, Expr, ExprKind, FnDecl, HirId, ItemKind, LangItem, MatchSource, Node, OwnerNode, PatKind, QPath, Stmt,
StmtKind,
@ -18,6 +22,7 @@ use rustc_session::declare_lint_pass;
use rustc_span::def_id::LocalDefId;
use rustc_span::{BytePos, Pos, Span};
use std::borrow::Cow;
use std::fmt::Display;
declare_clippy_lint! {
/// ### What it does
@ -146,14 +151,14 @@ impl<'tcx> RetReplacement<'tcx> {
}
}
impl<'tcx> ToString for RetReplacement<'tcx> {
fn to_string(&self) -> String {
impl<'tcx> Display for RetReplacement<'tcx> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::Empty => String::new(),
Self::Block => "{}".to_string(),
Self::Unit => "()".to_string(),
Self::IfSequence(inner, _) => format!("({inner})"),
Self::Expr(inner, _) => inner.to_string(),
Self::Empty => write!(f, ""),
Self::Block => write!(f, "{{}}"),
Self::Unit => write!(f, "()"),
Self::IfSequence(inner, _) => write!(f, "({inner})"),
Self::Expr(inner, _) => write!(f, "{inner}"),
}
}
}
@ -181,7 +186,15 @@ impl<'tcx> LateLintPass<'tcx> for Return {
if !in_external_macro(cx.sess(), stmt.span)
&& let StmtKind::Semi(expr) = stmt.kind
&& let ExprKind::Ret(Some(ret)) = expr.kind
&& let ExprKind::Match(.., MatchSource::TryDesugar(_)) = ret.kind
// return Err(...)? desugars to a match
// over a Err(...).branch()
// which breaks down to a branch call, with the callee being
// the constructor of the Err variant
&& let ExprKind::Match(maybe_cons, _, MatchSource::TryDesugar(_)) = ret.kind
&& let ExprKind::Call(_, [maybe_result_err]) = maybe_cons.kind
&& let ExprKind::Call(maybe_constr, _) = maybe_result_err.kind
&& is_res_lang_ctor(cx, path_res(cx, maybe_constr), ResultErr)
// Ensure this is not the final stmt, otherwise removing it would cause a compile error
&& let OwnerNode::Item(item) = cx.tcx.hir_owner_node(cx.tcx.hir().get_parent_item(expr.hir_id))
&& let ItemKind::Fn(_, _, body) = item.kind

67
clippy_lints/src/to_string_trait_impl.rs Normal file
View file

@ -0,0 +1,67 @@
use clippy_utils::diagnostics::span_lint_and_help;
use rustc_hir::{Impl, Item, ItemKind};
use rustc_lint::{LateContext, LateLintPass};
use rustc_session::declare_lint_pass;
use rustc_span::sym;
declare_clippy_lint! {
/// ### What it does
/// Checks for direct implementations of `ToString`.
/// ### Why is this bad?
/// This trait is automatically implemented for any type which implements the `Display` trait.
/// As such, `ToString` shouldn’t be implemented directly: `Display` should be implemented instead,
/// and you get the `ToString` implementation for free.
/// ### Example
/// ```no_run
/// struct Point {
/// x: usize,
/// y: usize,
/// }
///
/// impl ToString for Point {
/// fn to_string(&self) -> String {
/// format!("({}, {})", self.x, self.y)
/// }
/// }
/// ```
/// Use instead:
/// ```no_run
/// struct Point {
/// x: usize,
/// y: usize,
/// }
///
/// impl std::fmt::Display for Point {
/// fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
/// write!(f, "({}, {})", self.x, self.y)
/// }
/// }
/// ```
#[clippy::version = "1.77.0"]
pub TO_STRING_TRAIT_IMPL,
style,
"check for direct implementations of `ToString`"
}
declare_lint_pass!(ToStringTraitImpl => [TO_STRING_TRAIT_IMPL]);
impl<'tcx> LateLintPass<'tcx> for ToStringTraitImpl {
fn check_item(&mut self, cx: &LateContext<'tcx>, it: &'tcx Item<'tcx>) {
if let ItemKind::Impl(Impl {
of_trait: Some(trait_ref),
..
}) = it.kind
&& let Some(trait_did) = trait_ref.trait_def_id()
&& cx.tcx.is_diagnostic_item(sym::ToString, trait_did)
{
span_lint_and_help(
cx,
TO_STRING_TRAIT_IMPL,
it.span,
"direct implementation of `ToString`",
None,
"prefer implementing `Display` instead",
);
}
}
}

86
clippy_lints/src/unconditional_recursion.rs
View file

@ -69,14 +69,6 @@ fn span_error(cx: &LateContext<'_>, method_span: Span, expr: &Expr<'_>) {
);
}
fn get_ty_def_id(ty: Ty<'_>) -> Option<DefId> {
match ty.peel_refs().kind() {
ty::Adt(adt, _) => Some(adt.did()),
ty::Foreign(def_id) => Some(*def_id),
_ => None,
}
}
fn get_hir_ty_def_id<'tcx>(tcx: TyCtxt<'tcx>, hir_ty: rustc_hir::Ty<'tcx>) -> Option<DefId> {
let TyKind::Path(qpath) = hir_ty.kind else { return None };
match qpath {
@ -131,21 +123,49 @@ fn get_impl_trait_def_id(cx: &LateContext<'_>, method_def_id: LocalDefId) -> Opt
}
}
#[allow(clippy::unnecessary_def_path)]
/// When we have `x == y` where `x = &T` and `y = &T`, then that resolves to
/// `<&T as PartialEq<&T>>::eq`, which is not the same as `<T as PartialEq<T>>::eq`,
/// however we still would want to treat it the same, because we know that it's a blanket impl
/// that simply delegates to the `PartialEq` impl with one reference removed.
///
/// Still, we can't just do `lty.peel_refs() == rty.peel_refs()` because when we have `x = &T` and
/// `y = &&T`, this is not necessarily the same as `<T as PartialEq<T>>::eq`
///
/// So to avoid these FNs and FPs, we keep removing a layer of references from *both* sides
/// until both sides match the expected LHS and RHS type (or they don't).
fn matches_ty<'tcx>(
mut left: Ty<'tcx>,
mut right: Ty<'tcx>,
expected_left: Ty<'tcx>,
expected_right: Ty<'tcx>,
) -> bool {
while let (&ty::Ref(_, lty, _), &ty::Ref(_, rty, _)) = (left.kind(), right.kind()) {
if lty == expected_left && rty == expected_right {
return true;
}
left = lty;
right = rty;
}
false
}
fn check_partial_eq(cx: &LateContext<'_>, method_span: Span, method_def_id: LocalDefId, name: Ident, expr: &Expr<'_>) {
let args = cx
.tcx
.instantiate_bound_regions_with_erased(cx.tcx.fn_sig(method_def_id).skip_binder())
.inputs();
let Some(sig) = cx
.typeck_results()
.liberated_fn_sigs()
.get(cx.tcx.local_def_id_to_hir_id(method_def_id))
else {
return;
};
// That has two arguments.
if let [self_arg, other_arg] = args
&& let Some(self_arg) = get_ty_def_id(*self_arg)
&& let Some(other_arg) = get_ty_def_id(*other_arg)
if let [self_arg, other_arg] = sig.inputs()
&& let &ty::Ref(_, self_arg, _) = self_arg.kind()
&& let &ty::Ref(_, other_arg, _) = other_arg.kind()
// The two arguments are of the same type.
&& self_arg == other_arg
&& let Some(trait_def_id) = get_impl_trait_def_id(cx, method_def_id)
// The trait is `PartialEq`.
&& Some(trait_def_id) == get_trait_def_id(cx, &["core", "cmp", "PartialEq"])
&& cx.tcx.is_diagnostic_item(sym::PartialEq, trait_def_id)
{
let to_check_op = if name.name == sym::eq {
BinOpKind::Eq
@ -154,31 +174,19 @@ fn check_partial_eq(cx: &LateContext<'_>, method_span: Span, method_def_id: Loca
};
let is_bad = match expr.kind {
ExprKind::Binary(op, left, right) if op.node == to_check_op => {
// Then we check if the left-hand element is of the same type as `self`.
if let Some(left_ty) = cx.typeck_results().expr_ty_opt(left)
&& let Some(left_id) = get_ty_def_id(left_ty)
&& self_arg == left_id
&& let Some(right_ty) = cx.typeck_results().expr_ty_opt(right)
&& let Some(right_id) = get_ty_def_id(right_ty)
&& other_arg == right_id
{
true
} else {
false
}
// Then we check if the LHS matches self_arg and RHS matches other_arg
let left_ty = cx.typeck_results().expr_ty_adjusted(left);
let right_ty = cx.typeck_results().expr_ty_adjusted(right);
matches_ty(left_ty, right_ty, self_arg, other_arg)
},
ExprKind::MethodCall(segment, receiver, &[_arg], _) if segment.ident.name == name.name => {
if let Some(ty) = cx.typeck_results().expr_ty_opt(receiver)
&& let Some(ty_id) = get_ty_def_id(ty)
&& self_arg != ty_id
{
// Since this called on a different type, the lint should not be
// triggered here.
return;
}
ExprKind::MethodCall(segment, receiver, [arg], _) if segment.ident.name == name.name => {
let receiver_ty = cx.typeck_results().expr_ty_adjusted(receiver);
let arg_ty = cx.typeck_results().expr_ty_adjusted(arg);
if let Some(fn_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id)
&& let Some(trait_id) = cx.tcx.trait_of_item(fn_id)
&& trait_id == trait_def_id
&& matches_ty(receiver_ty, arg_ty, self_arg, other_arg)
{
true
} else {

99
clippy_lints/src/unused_io_amount.rs
View file

@ -1,5 +1,6 @@
use clippy_utils::diagnostics::span_lint_and_then;
use clippy_utils::{is_res_lang_ctor, is_trait_method, match_trait_method, paths};
use clippy_utils::macros::{is_panic, root_macro_call_first_node};
use clippy_utils::{is_res_lang_ctor, is_trait_method, match_trait_method, paths, peel_blocks};
use hir::{ExprKind, PatKind};
use rustc_hir as hir;
use rustc_lint::{LateContext, LateLintPass};
@ -82,37 +83,72 @@ impl<'tcx> LateLintPass<'tcx> for UnusedIoAmount {
}
if let Some(exp) = block.expr
&& matches!(exp.kind, hir::ExprKind::If(_, _, _) | hir::ExprKind::Match(_, _, _))
&& matches!(
exp.kind,
hir::ExprKind::If(_, _, _) | hir::ExprKind::Match(_, _, hir::MatchSource::Normal)
)
{
check_expr(cx, exp);
}
}
}
fn non_consuming_err_arm<'a>(cx: &LateContext<'a>, arm: &hir::Arm<'a>) -> bool {
// if there is a guard, we consider the result to be consumed
if arm.guard.is_some() {
return false;
}
if is_unreachable_or_panic(cx, arm.body) {
// if the body is unreachable or there is a panic,
// we consider the result to be consumed
return false;
}
if let PatKind::TupleStruct(ref path, [inner_pat], _) = arm.pat.kind {
return is_res_lang_ctor(cx, cx.qpath_res(path, inner_pat.hir_id), hir::LangItem::ResultErr);
}
false
}
fn non_consuming_ok_arm<'a>(cx: &LateContext<'a>, arm: &hir::Arm<'a>) -> bool {
// if there is a guard, we consider the result to be consumed
if arm.guard.is_some() {
return false;
}
if is_unreachable_or_panic(cx, arm.body) {
// if the body is unreachable or there is a panic,
// we consider the result to be consumed
return false;
}
if is_ok_wild_or_dotdot_pattern(cx, arm.pat) {
return true;
}
false
}
fn check_expr<'a>(cx: &LateContext<'a>, expr: &'a hir::Expr<'a>) {
match expr.kind {
hir::ExprKind::If(cond, _, _)
if let ExprKind::Let(hir::Let { pat, init, .. }) = cond.kind
&& pattern_is_ignored_ok(cx, pat)
&& is_ok_wild_or_dotdot_pattern(cx, pat)
&& let Some(op) = should_lint(cx, init) =>
{
emit_lint(cx, cond.span, op, &[pat.span]);
},
hir::ExprKind::Match(expr, arms, hir::MatchSource::Normal) if let Some(op) = should_lint(cx, expr) => {
let found_arms: Vec<_> = arms
.iter()
.filter_map(|arm| {
if pattern_is_ignored_ok(cx, arm.pat) {
Some(arm.span)
} else {
None
// we will capture only the case where the match is Ok( ) or Err( )
// prefer to match the minimum possible, and expand later if needed
// to avoid false positives on something as used as this
hir::ExprKind::Match(expr, [arm1, arm2], hir::MatchSource::Normal) if let Some(op) = should_lint(cx, expr) => {
if non_consuming_ok_arm(cx, arm1) && non_consuming_err_arm(cx, arm2) {
emit_lint(cx, expr.span, op, &[arm1.pat.span]);
}
})
.collect();
if !found_arms.is_empty() {
emit_lint(cx, expr.span, op, found_arms.as_slice());
if non_consuming_ok_arm(cx, arm2) && non_consuming_err_arm(cx, arm1) {
emit_lint(cx, expr.span, op, &[arm2.pat.span]);
}
},
hir::ExprKind::Match(_, _, hir::MatchSource::Normal) => {},
_ if let Some(op) = should_lint(cx, expr) => {
emit_lint(cx, expr.span, op, &[]);
},
@ -130,25 +166,40 @@ fn should_lint<'a>(cx: &LateContext<'a>, mut inner: &'a hir::Expr<'a>) -> Option
check_io_mode(cx, inner)
}
fn pattern_is_ignored_ok(cx: &LateContext<'_>, pat: &hir::Pat<'_>) -> bool {
fn is_ok_wild_or_dotdot_pattern<'a>(cx: &LateContext<'a>, pat: &hir::Pat<'a>) -> bool {
// the if checks whether we are in a result Ok( ) pattern
// and the return checks whether it is unhandled
if let PatKind::TupleStruct(ref path, inner_pat, ddp) = pat.kind
if let PatKind::TupleStruct(ref path, inner_pat, _) = pat.kind
// we check against Result::Ok to avoid linting on Err(_) or something else.
&& is_res_lang_ctor(cx, cx.qpath_res(path, pat.hir_id), hir::LangItem::ResultOk)
{
return match (inner_pat, ddp.as_opt_usize()) {
// Ok(_) pattern
([inner_pat], None) if matches!(inner_pat.kind, PatKind::Wild) => true,
// Ok(..) pattern
([], Some(0)) => true,
_ => false,
};
if matches!(inner_pat, []) {
return true;
}
if let [cons_pat] = inner_pat
&& matches!(cons_pat.kind, PatKind::Wild)
{
return true;
}
return false;
}
false
}
// this is partially taken from panic_unimplemented
fn is_unreachable_or_panic(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> bool {
let expr = peel_blocks(expr);
let Some(macro_call) = root_macro_call_first_node(cx, expr) else {
return false;
};
if is_panic(cx, macro_call.def_id) {
return !cx.tcx.hir().is_inside_const_context(expr.hir_id);
}
matches!(cx.tcx.item_name(macro_call.def_id).as_str(), "unreachable")
}
fn unpack_call_chain<'a>(mut expr: &'a hir::Expr<'a>) -> &'a hir::Expr<'a> {
while let hir::ExprKind::MethodCall(path, receiver, ..) = expr.kind {
if matches!(

6
clippy_lints/src/utils/author.rs
View file

@ -490,9 +490,9 @@ impl<'a, 'tcx> PrintVisitor<'a, 'tcx> {
format!("ClosureKind::Coroutine(CoroutineKind::Coroutine(Movability::{movability:?})")
},
},
ClosureKind::CoroutineClosure(desugaring) => format!(
"ClosureKind::CoroutineClosure(CoroutineDesugaring::{desugaring:?})"
),
ClosureKind::CoroutineClosure(desugaring) => {
format!("ClosureKind::CoroutineClosure(CoroutineDesugaring::{desugaring:?})")
},
};
let ret_ty = match fn_decl.output {

16
clippy_lints/src/wildcard_imports.rs
View file

@ -1,6 +1,7 @@
use clippy_utils::diagnostics::span_lint_and_sugg;
use clippy_utils::is_test_module_or_function;
use clippy_utils::source::{snippet, snippet_with_applicability};
use rustc_data_structures::fx::FxHashSet;
use rustc_errors::Applicability;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::{Item, ItemKind, PathSegment, UseKind};
@ -100,13 +101,15 @@ declare_clippy_lint! {
pub struct WildcardImports {
warn_on_all: bool,
test_modules_deep: u32,
allowed_segments: FxHashSet<String>,
}
impl WildcardImports {
pub fn new(warn_on_all: bool) -> Self {
pub fn new(warn_on_all: bool, allowed_wildcard_imports: FxHashSet<String>) -> Self {
Self {
warn_on_all,
test_modules_deep: 0,
allowed_segments: allowed_wildcard_imports,
}
}
}
@ -190,6 +193,7 @@ impl WildcardImports {
item.span.from_expansion()
|| is_prelude_import(segments)
|| (is_super_only_import(segments) && self.test_modules_deep > 0)
|| is_allowed_via_config(segments, &self.allowed_segments)
}
}
@ -198,10 +202,18 @@ impl WildcardImports {
fn is_prelude_import(segments: &[PathSegment<'_>]) -> bool {
segments
.iter()
.any(|ps| ps.ident.name.as_str().contains(sym::prelude.as_str()))
.any(|ps| ps.ident.as_str().contains(sym::prelude.as_str()))
}
// Allow "super::*" imports in tests.
fn is_super_only_import(segments: &[PathSegment<'_>]) -> bool {
segments.len() == 1 && segments[0].ident.name == kw::Super
}
// Allow skipping imports containing user configured segments,
// i.e. "...::utils::...::*" if user put `allowed-wildcard-imports = ["utils"]` in `Clippy.toml`
fn is_allowed_via_config(segments: &[PathSegment<'_>], allowed_segments: &FxHashSet<String>) -> bool {
// segment matching need to be exact instead of using 'contains', in case user unintentionaly put
// a single character in the config thus skipping most of the warnings.
segments.iter().any(|seg| allowed_segments.contains(seg.ident.as_str()))
}

2
clippy_utils/Cargo.toml
View file

@ -1,6 +1,6 @@
[package]
name = "clippy_utils"
version = "0.1.77"
version = "0.1.78"
edition = "2021"
publish = false

343
clippy_utils/src/lib.rs
View file

@ -1,5 +1,6 @@
#![feature(array_chunks)]
#![feature(box_patterns)]
#![feature(control_flow_enum)]
#![feature(if_let_guard)]
#![feature(let_chains)]
#![feature(lint_reasons)]
@ -75,6 +76,7 @@ use core::mem;
use core::ops::ControlFlow;
use std::collections::hash_map::Entry;
use std::hash::BuildHasherDefault;
use std::iter::{once, repeat};
use std::sync::{Mutex, MutexGuard, OnceLock};
use itertools::Itertools;
@ -84,6 +86,7 @@ use rustc_data_structures::packed::Pu128;
use rustc_data_structures::unhash::UnhashMap;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::{CrateNum, DefId, LocalDefId, LocalModDefId, LOCAL_CRATE};
use rustc_hir::definitions::{DefPath, DefPathData};
use rustc_hir::hir_id::{HirIdMap, HirIdSet};
use rustc_hir::intravisit::{walk_expr, FnKind, Visitor};
use rustc_hir::LangItem::{OptionNone, OptionSome, ResultErr, ResultOk};
@ -102,8 +105,8 @@ use rustc_middle::ty::binding::BindingMode;
use rustc_middle::ty::fast_reject::SimplifiedType;
use rustc_middle::ty::layout::IntegerExt;
use rustc_middle::ty::{
self as rustc_ty, Binder, BorrowKind, ClosureKind, FloatTy, IntTy, ParamEnv, ParamEnvAnd, Ty, TyCtxt, TypeAndMut,
TypeVisitableExt, UintTy, UpvarCapture,
self as rustc_ty, Binder, BorrowKind, ClosureKind, EarlyBinder, FloatTy, GenericArgsRef, IntTy, ParamEnv,
ParamEnvAnd, Ty, TyCtxt, TypeAndMut, TypeVisitableExt, UintTy, UpvarCapture,
};
use rustc_span::hygiene::{ExpnKind, MacroKind};
use rustc_span::source_map::SourceMap;
@ -114,10 +117,7 @@ use visitors::Visitable;
use crate::consts::{constant, mir_to_const, Constant};
use crate::higher::Range;
use crate::ty::{
adt_and_variant_of_res, can_partially_move_ty, expr_sig, is_copy, is_recursively_primitive_type,
ty_is_fn_once_param,
};
use crate::ty::{adt_and_variant_of_res, can_partially_move_ty, expr_sig, is_copy, is_recursively_primitive_type};
use crate::visitors::for_each_expr;
use rustc_middle::hir::nested_filter;
@ -1353,46 +1353,12 @@ pub fn get_enclosing_loop_or_multi_call_closure<'tcx>(
for (_, node) in cx.tcx.hir().parent_iter(expr.hir_id) {
match node {
Node::Expr(e) => match e.kind {
ExprKind::Closure { .. } => {
ExprKind::Closure { .. }
if let rustc_ty::Closure(_, subs) = cx.typeck_results().expr_ty(e).kind()
&& subs.as_closure().kind() == ClosureKind::FnOnce
{
continue;
}
let is_once = walk_to_expr_usage(cx, e, |node, id| {
let Node::Expr(e) = node else {
return None;
};
match e.kind {
ExprKind::Call(f, _) if f.hir_id == id => Some(()),
ExprKind::Call(f, args) => {
let i = args.iter().position(|arg| arg.hir_id == id)?;
let sig = expr_sig(cx, f)?;
let predicates = sig
.predicates_id()
.map_or(cx.param_env, |id| cx.tcx.param_env(id))
.caller_bounds();
sig.input(i).and_then(|ty| {
ty_is_fn_once_param(cx.tcx, ty.skip_binder(), predicates).then_some(())
})
},
ExprKind::MethodCall(_, receiver, args, _) => {
let i = std::iter::once(receiver)
.chain(args.iter())
.position(|arg| arg.hir_id == id)?;
let id = cx.typeck_results().type_dependent_def_id(e.hir_id)?;
let ty = cx.tcx.fn_sig(id).instantiate_identity().skip_binder().inputs()[i];
ty_is_fn_once_param(cx.tcx, ty, cx.tcx.param_env(id).caller_bounds()).then_some(())
},
_ => None,
}
})
.is_some();
if !is_once {
return Some(e);
}
},
ExprKind::Loop(..) => return Some(e),
&& subs.as_closure().kind() == ClosureKind::FnOnce => {},
// Note: A closure's kind is determined by how it's used, not it's captures.
ExprKind::Closure { .. } | ExprKind::Loop(..) => return Some(e),
_ => (),
},
Node::Stmt(_) | Node::Block(_) | Node::Local(_) | Node::Arm(_) => (),
@ -2590,26 +2556,30 @@ pub fn is_test_module_or_function(tcx: TyCtxt<'_>, item: &Item<'_>) -> bool {
&& item.ident.name.as_str().split('_').any(|a| a == "test" || a == "tests")
}
/// Walks the HIR tree from the given expression, up to the node where the value produced by the
/// expression is consumed. Calls the function for every node encountered this way until it returns
/// `Some`.
/// Walks up the HIR tree from the given expression in an attempt to find where the value is
/// consumed.
///
/// This allows walking through `if`, `match`, `break`, block expressions to find where the value
/// produced by the expression is consumed.
/// Termination has three conditions:
/// - The given function returns `Break`. This function will return the value.
/// - The consuming node is found. This function will return `Continue(use_node, child_id)`.
/// - No further parent nodes are found. This will trigger a debug assert or return `None`.
///
/// This allows walking through `if`, `match`, `break`, and block expressions to find where the
/// value produced by the expression is consumed.
pub fn walk_to_expr_usage<'tcx, T>(
cx: &LateContext<'tcx>,
e: &Expr<'tcx>,
mut f: impl FnMut(Node<'tcx>, HirId) -> Option<T>,
) -> Option<T> {
mut f: impl FnMut(HirId, Node<'tcx>, HirId) -> ControlFlow<T>,
) -> Option<ControlFlow<T, (Node<'tcx>, HirId)>> {
let map = cx.tcx.hir();
let mut iter = map.parent_iter(e.hir_id);
let mut child_id = e.hir_id;
while let Some((parent_id, parent)) = iter.next() {
if let Some(x) = f(parent, child_id) {
return Some(x);
if let ControlFlow::Break(x) = f(parent_id, parent, child_id) {
return Some(ControlFlow::Break(x));
}
let parent = match parent {
let parent_expr = match parent {
Node::Expr(e) => e,
Node::Block(Block { expr: Some(body), .. }) | Node::Arm(Arm { body, .. }) if body.hir_id == child_id => {
child_id = parent_id;
@ -2619,18 +2589,19 @@ pub fn walk_to_expr_usage<'tcx, T>(
child_id = parent_id;
continue;
},
_ => return None,
_ => return Some(ControlFlow::Continue((parent, child_id))),
};
match parent.kind {
match parent_expr.kind {
ExprKind::If(child, ..) | ExprKind::Match(child, ..) if child.hir_id != child_id => child_id = parent_id,
ExprKind::Break(Destination { target_id: Ok(id), .. }, _) => {
child_id = id;
iter = map.parent_iter(id);
},
ExprKind::Block(..) => child_id = parent_id,
_ => return None,
ExprKind::Block(..) | ExprKind::DropTemps(_) => child_id = parent_id,
_ => return Some(ControlFlow::Continue((parent, child_id))),
}
}
debug_assert!(false, "no parent node found for `{child_id:?}`");
None
}
@ -2674,6 +2645,8 @@ pub enum ExprUseNode<'tcx> {
Callee,
/// Access of a field.
FieldAccess(Ident),
Expr,
Other,
}
impl<'tcx> ExprUseNode<'tcx> {
/// Checks if the value is returned from the function.
@ -2750,144 +2723,104 @@ impl<'tcx> ExprUseNode<'tcx> {
let sig = cx.tcx.fn_sig(id).skip_binder();
Some(DefinedTy::Mir(cx.tcx.param_env(id).and(sig.input(i))))
},
Self::Local(_) | Self::FieldAccess(..) | Self::Callee => None,
Self::Local(_) | Self::FieldAccess(..) | Self::Callee | Self::Expr | Self::Other => None,
}
}
}
/// Gets the context an expression's value is used in.
#[expect(clippy::too_many_lines)]
pub fn expr_use_ctxt<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'tcx>) -> Option<ExprUseCtxt<'tcx>> {
let mut adjustments = [].as_slice();
let mut is_ty_unified = false;
let mut moved_before_use = false;
let ctxt = e.span.ctxt();
walk_to_expr_usage(cx, e, &mut |parent, child_id| {
// LocalTableInContext returns the wrong lifetime, so go use `expr_adjustments` instead.
walk_to_expr_usage(cx, e, &mut |parent_id, parent, child_id| {
if adjustments.is_empty()
&& let Node::Expr(e) = cx.tcx.hir_node(child_id)
{
adjustments = cx.typeck_results().expr_adjustments(e);
}
match parent {
Node::Local(l) if l.span.ctxt() == ctxt => Some(ExprUseCtxt {
node: ExprUseNode::Local(l),
adjustments,
is_ty_unified,
moved_before_use,
}),
if cx.tcx.hir().span(parent_id).ctxt() != ctxt {
return ControlFlow::Break(());
}
if let Node::Expr(e) = parent {
match e.kind {
ExprKind::If(e, _, _) | ExprKind::Match(e, _, _) if e.hir_id != child_id => {
is_ty_unified = true;
moved_before_use = true;
},
ExprKind::Block(_, Some(_)) | ExprKind::Break(..) => {
is_ty_unified = true;
moved_before_use = true;
},
ExprKind::Block(..) => moved_before_use = true,
_ => {},
}
}
ControlFlow::Continue(())
})?
.continue_value()
.map(|(use_node, child_id)| {
let node = match use_node {
Node::Local(l) => ExprUseNode::Local(l),
Node::ExprField(field) => ExprUseNode::Field(field),
Node::Item(&Item {
kind: ItemKind::Static(..) | ItemKind::Const(..),
owner_id,
span,
..
})
| Node::TraitItem(&TraitItem {
kind: TraitItemKind::Const(..),
owner_id,
span,
..
})
| Node::ImplItem(&ImplItem {
kind: ImplItemKind::Const(..),
owner_id,
span,
..
}) if span.ctxt() == ctxt => Some(ExprUseCtxt {
node: ExprUseNode::ConstStatic(owner_id),
adjustments,
is_ty_unified,
moved_before_use,
}),
}) => ExprUseNode::ConstStatic(owner_id),
Node::Item(&Item {
kind: ItemKind::Fn(..),
owner_id,
span,
..
})
| Node::TraitItem(&TraitItem {
kind: TraitItemKind::Fn(..),
owner_id,
span,
..
})
| Node::ImplItem(&ImplItem {
kind: ImplItemKind::Fn(..),
owner_id,
span,
..
}) if span.ctxt() == ctxt => Some(ExprUseCtxt {
node: ExprUseNode::Return(owner_id),
adjustments,
is_ty_unified,
moved_before_use,
}),
}) => ExprUseNode::Return(owner_id),
Node::ExprField(field) if field.span.ctxt() == ctxt => Some(ExprUseCtxt {
node: ExprUseNode::Field(field),
adjustments,
is_ty_unified,
moved_before_use,
}),
Node::Expr(parent) if parent.span.ctxt() == ctxt => match parent.kind {
ExprKind::Ret(_) => Some(ExprUseCtxt {
node: ExprUseNode::Return(OwnerId {
Node::Expr(use_expr) => match use_expr.kind {
ExprKind::Ret(_) => ExprUseNode::Return(OwnerId {
def_id: cx.tcx.hir().body_owner_def_id(cx.enclosing_body.unwrap()),
}),
adjustments,
is_ty_unified,
moved_before_use,
}),
ExprKind::Closure(closure) => Some(ExprUseCtxt {
node: ExprUseNode::Return(OwnerId { def_id: closure.def_id }),
adjustments,
is_ty_unified,
moved_before_use,
}),
ExprKind::Call(func, args) => Some(ExprUseCtxt {
node: match args.iter().position(|arg| arg.hir_id == child_id) {
ExprKind::Closure(closure) => ExprUseNode::Return(OwnerId { def_id: closure.def_id }),
ExprKind::Call(func, args) => match args.iter().position(|arg| arg.hir_id == child_id) {
Some(i) => ExprUseNode::FnArg(func, i),
None => ExprUseNode::Callee,
},
adjustments,
is_ty_unified,
moved_before_use,
}),
ExprKind::MethodCall(name, _, args, _) => Some(ExprUseCtxt {
node: ExprUseNode::MethodArg(
parent.hir_id,
ExprKind::MethodCall(name, _, args, _) => ExprUseNode::MethodArg(
use_expr.hir_id,
name.args,
args.iter().position(|arg| arg.hir_id == child_id).map_or(0, |i| i + 1),
),
ExprKind::Field(child, name) if child.hir_id == e.hir_id => ExprUseNode::FieldAccess(name),
_ => ExprUseNode::Expr,
},
_ => ExprUseNode::Other,
};
ExprUseCtxt {
node,
adjustments,
is_ty_unified,
moved_before_use,
}),
ExprKind::Field(child, name) if child.hir_id == e.hir_id => Some(ExprUseCtxt {
node: ExprUseNode::FieldAccess(name),
adjustments,
is_ty_unified,
moved_before_use,
}),
ExprKind::If(e, _, _) | ExprKind::Match(e, _, _) if e.hir_id != child_id => {
is_ty_unified = true;
moved_before_use = true;
None
},
ExprKind::Block(_, Some(_)) | ExprKind::Break(..) => {
is_ty_unified = true;
moved_before_use = true;
None
},
ExprKind::Block(..) => {
moved_before_use = true;
None
},
_ => None,
},
_ => None,
}
})
}
@ -3264,3 +3197,131 @@ pub fn is_never_expr<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> Option<
})
}
}
/// Produces a path from a local caller to the type of the called method. Suitable for user
/// output/suggestions.
///
/// Returned path can be either absolute (for methods defined non-locally), or relative (for local
/// methods).
pub fn get_path_from_caller_to_method_type<'tcx>(
tcx: TyCtxt<'tcx>,
from: LocalDefId,
method: DefId,
args: GenericArgsRef<'tcx>,
) -> String {
let assoc_item = tcx.associated_item(method);
let def_id = assoc_item.container_id(tcx);
match assoc_item.container {
rustc_ty::TraitContainer => get_path_to_callee(tcx, from, def_id),
rustc_ty::ImplContainer => {
let ty = tcx.type_of(def_id).instantiate_identity();
get_path_to_ty(tcx, from, ty, args)
},
}
}
fn get_path_to_ty<'tcx>(tcx: TyCtxt<'tcx>, from: LocalDefId, ty: Ty<'tcx>, args: GenericArgsRef<'tcx>) -> String {
match ty.kind() {
rustc_ty::Adt(adt, _) => get_path_to_callee(tcx, from, adt.did()),
// TODO these types need to be recursively resolved as well
rustc_ty::Array(..)
| rustc_ty::Dynamic(..)
| rustc_ty::Never
| rustc_ty::RawPtr(_)
| rustc_ty::Ref(..)
| rustc_ty::Slice(_)
| rustc_ty::Tuple(_) => format!("<{}>", EarlyBinder::bind(ty).instantiate(tcx, args)),
_ => ty.to_string(),
}
}
/// Produce a path from some local caller to the callee. Suitable for user output/suggestions.
fn get_path_to_callee(tcx: TyCtxt<'_>, from: LocalDefId, callee: DefId) -> String {
// only search for a relative path if the call is fully local
if callee.is_local() {
let callee_path = tcx.def_path(callee);
let caller_path = tcx.def_path(from.to_def_id());
maybe_get_relative_path(&caller_path, &callee_path, 2)
} else {
tcx.def_path_str(callee)
}
}
/// Tries to produce a relative path from `from` to `to`; if such a path would contain more than
/// `max_super` `super` items, produces an absolute path instead. Both `from` and `to` should be in
/// the local crate.
///
/// Suitable for user output/suggestions.
///
/// This ignores use items, and assumes that the target path is visible from the source
/// path (which _should_ be a reasonable assumption since we in order to be able to use an object of
/// certain type T, T is required to be visible).
///
/// TODO make use of `use` items. Maybe we should have something more sophisticated like
/// rust-analyzer does? <https://docs.rs/ra_ap_hir_def/0.0.169/src/ra_ap_hir_def/find_path.rs.html#19-27>
fn maybe_get_relative_path(from: &DefPath, to: &DefPath, max_super: usize) -> String {
use itertools::EitherOrBoth::{Both, Left, Right};
// 1. skip the segments common for both paths (regardless of their type)
let unique_parts = to
.data
.iter()
.zip_longest(from.data.iter())
.skip_while(|el| matches!(el, Both(l, r) if l == r))
.map(|el| match el {
Both(l, r) => Both(l.data, r.data),
Left(l) => Left(l.data),
Right(r) => Right(r.data),
});
// 2. for the remaning segments, construct relative path using only mod names and `super`
let mut go_up_by = 0;
let mut path = Vec::new();
for el in unique_parts {
match el {
Both(l, r) => {
// consider:
// a::b::sym:: :: refers to
// c::d::e ::f::sym
// result should be super::super::c::d::e::f
//
// alternatively:
// a::b::c ::d::sym refers to
// e::f::sym:: ::
// result should be super::super::super::super::e::f
if let DefPathData::TypeNs(s) = l {
path.push(s.to_string());
}
if let DefPathData::TypeNs(_) = r {
go_up_by += 1;
}
},
// consider:
// a::b::sym:: :: refers to
// c::d::e ::f::sym
// when looking at `f`
Left(DefPathData::TypeNs(sym)) => path.push(sym.to_string()),
// consider:
// a::b::c ::d::sym refers to
// e::f::sym:: ::
// when looking at `d`
Right(DefPathData::TypeNs(_)) => go_up_by += 1,
_ => {},
}
}
if go_up_by > max_super {
// `super` chain would be too long, just use the absolute path instead
once(String::from("crate"))
.chain(to.data.iter().filter_map(|el| {
if let DefPathData::TypeNs(sym) = el.data {
Some(sym.to_string())
} else {
None
}
}))
.join("::")
} else {
repeat(String::from("super")).take(go_up_by).chain(path).join("::")
}
}

29
clippy_utils/src/ty.rs
View file

@ -1000,35 +1000,6 @@ pub fn adt_and_variant_of_res<'tcx>(cx: &LateContext<'tcx>, res: Res) -> Option<
}
}
/// Checks if the type is a type parameter implementing `FnOnce`, but not `FnMut`.
pub fn ty_is_fn_once_param<'tcx>(tcx: TyCtxt<'_>, ty: Ty<'tcx>, predicates: &'tcx [ty::Clause<'_>]) -> bool {
let ty::Param(ty) = *ty.kind() else {
return false;
};
let lang = tcx.lang_items();
let (Some(fn_once_id), Some(fn_mut_id), Some(fn_id)) = (lang.fn_once_trait(), lang.fn_mut_trait(), lang.fn_trait())
else {
return false;
};
predicates
.iter()
.try_fold(false, |found, p| {
if let ty::ClauseKind::Trait(p) = p.kind().skip_binder()
&& let ty::Param(self_ty) = p.trait_ref.self_ty().kind()
&& ty.index == self_ty.index
{
// This should use `super_traits_of`, but that's a private function.
if p.trait_ref.def_id == fn_once_id {
return Some(true);
} else if p.trait_ref.def_id == fn_mut_id || p.trait_ref.def_id == fn_id {
return None;
}
}
Some(found)
})
.unwrap_or(false)
}
/// Comes up with an "at least" guesstimate for the type's size, not taking into
/// account the layout of type parameters.
pub fn approx_ty_size<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> u64 {

2
declare_clippy_lint/Cargo.toml
View file

@ -1,6 +1,6 @@
[package]
name = "declare_clippy_lint"
version = "0.1.77"
version = "0.1.78"
edition = "2021"
publish = false

2
rust-toolchain
View file

@ -1,3 +1,3 @@
[toolchain]
channel = "nightly-2024-01-25"
channel = "nightly-2024-02-08"
components = ["cargo", "llvm-tools", "rust-src", "rust-std", "rustc", "rustc-dev", "rustfmt"]

25
src/driver.rs
View file

@ -22,9 +22,11 @@ use rustc_session::EarlyDiagCtxt;
use rustc_span::symbol::Symbol;
use std::env;
use std::fs::read_to_string;
use std::ops::Deref;
use std::path::Path;
use std::process::exit;
use std::string::ToString;
use anstream::println;
@ -188,12 +190,31 @@ pub fn main() {
exit(rustc_driver::catch_with_exit_code(move || {
let mut orig_args: Vec<String> = env::args().collect();
let has_sysroot_arg = arg_value(&orig_args, "--sysroot", |_| true).is_some();
let has_sysroot_arg = |args: &mut [String]| -> bool {
if arg_value(args, "--sysroot", |_| true).is_some() {
return true;
}
// https://doc.rust-lang.org/rustc/command-line-arguments.html#path-load-command-line-flags-from-a-path
// Beside checking for existence of `--sysroot` on the command line, we need to
// check for the arg files that are prefixed with @ as well to be consistent with rustc
for arg in args.iter() {
if let Some(arg_file_path) = arg.strip_prefix('@') {
if let Ok(arg_file) = read_to_string(arg_file_path) {
let split_arg_file: Vec<String> = arg_file.lines().map(ToString::to_string).collect();
if arg_value(&split_arg_file, "--sysroot", |_| true).is_some() {
return true;
}
}
}
}
false
};
let sys_root_env = std::env::var("SYSROOT").ok();
let pass_sysroot_env_if_given = |args: &mut Vec<String>, sys_root_env| {
if let Some(sys_root) = sys_root_env {
if !has_sysroot_arg {
if !has_sysroot_arg(args) {
args.extend(vec!["--sysroot".into(), sys_root]);
}
};

45
tests/ui-cargo/lint_groups_priority/fail/Cargo.stderr Normal file
View file

@ -0,0 +1,45 @@
error: lint group `rust_2018_idioms` has the same priority (0) as a lint
--> Cargo.toml:7:1
|
7 | rust_2018_idioms = "warn"
| ^^^^^^^^^^^^^^^^ ------ has an implicit priority of 0
8 | bare_trait_objects = "allow"
| ------------------ has the same priority as this lint
|
= note: the order of the lints in the table is ignored by Cargo
= note: `#[deny(clippy::lint_groups_priority)]` on by default
help: to have lints override the group set `rust_2018_idioms` to a lower priority
|
7 | rust_2018_idioms = { level = "warn", priority = -1 }
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: lint group `unused` has the same priority (0) as a lint
--> Cargo.toml:10:1
|
10 | unused = { level = "deny" }
| ^^^^^^ ------------------ has an implicit priority of 0
11 | unused_braces = { level = "allow", priority = 1 }
12 | unused_attributes = { level = "allow" }
| ----------------- has the same priority as this lint
|
= note: the order of the lints in the table is ignored by Cargo
help: to have lints override the group set `unused` to a lower priority
|
10 | unused = { level = "deny", priority = -1 }
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: lint group `pedantic` has the same priority (-1) as a lint
--> Cargo.toml:19:1
|
19 | pedantic = { level = "warn", priority = -1 }
| ^^^^^^^^
20 | similar_names = { level = "allow", priority = -1 }
| ------------- has the same priority as this lint
|
= note: the order of the lints in the table is ignored by Cargo
help: to have lints override the group set `pedantic` to a lower priority
|
19 | pedantic = { level = "warn", priority = -2 }
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: could not compile `fail` (lib) due to 3 previous errors

20
tests/ui-cargo/lint_groups_priority/fail/Cargo.toml Normal file
View file

@ -0,0 +1,20 @@
[package]
name = "fail"
version = "0.1.0"
publish = false
[lints.rust]
rust_2018_idioms = "warn"
bare_trait_objects = "allow"
unused = { level = "deny" }
unused_braces = { level = "allow", priority = 1 }
unused_attributes = { level = "allow" }
# `warnings` is not a group so the order it is passed does not matter
warnings = "deny"
deprecated = "allow"
[lints.clippy]
pedantic = { level = "warn", priority = -1 }
similar_names = { level = "allow", priority = -1 }

1
tests/ui-cargo/lint_groups_priority/fail/src/lib.rs Normal file
View file

@ -0,0 +1 @@

10
tests/ui-cargo/lint_groups_priority/pass/Cargo.toml Normal file
View file

@ -0,0 +1,10 @@
[package]
name = "pass"
version = "0.1.0"
publish = false
[lints.clippy]
pedantic = { level = "warn", priority = -1 }
style = { level = "warn", priority = 1 }
similar_names = "allow"
dbg_macro = { level = "warn", priority = 2 }

1
tests/ui-cargo/lint_groups_priority/pass/src/lib.rs Normal file
View file

@ -0,0 +1 @@

2
tests/ui-toml/min_rust_version/min_rust_version.fixed
View file

@ -1,4 +1,4 @@
#![allow(clippy::redundant_clone, clippy::unnecessary_operation)]
#![allow(clippy::redundant_clone, clippy::unnecessary_operation, clippy::incompatible_msrv)]
#![warn(clippy::manual_non_exhaustive, clippy::borrow_as_ptr, clippy::manual_bits)]
use std::mem::{size_of, size_of_val};

2
tests/ui-toml/min_rust_version/min_rust_version.rs
View file

@ -1,4 +1,4 @@
#![allow(clippy::redundant_clone, clippy::unnecessary_operation)]
#![allow(clippy::redundant_clone, clippy::unnecessary_operation, clippy::incompatible_msrv)]
#![warn(clippy::manual_non_exhaustive, clippy::borrow_as_ptr, clippy::manual_bits)]
use std::mem::{size_of, size_of_val};

1
tests/ui-toml/modulo_arithmetic/clippy.toml Normal file
View file

@ -0,0 +1 @@
allow-comparison-to-zero = false

10
tests/ui-toml/modulo_arithmetic/modulo_arithmetic.rs Normal file
View file

@ -0,0 +1,10 @@
#![warn(clippy::modulo_arithmetic)]
fn main() {
let a = -1;
let b = 2;
let c = a % b == 0;
let c = a % b != 0;
let c = 0 == a % b;
let c = 0 != a % b;
}

40
tests/ui-toml/modulo_arithmetic/modulo_arithmetic.stderr Normal file
View file

@ -0,0 +1,40 @@
error: you are using modulo operator on types that might have different signs
--> $DIR/modulo_arithmetic.rs:6:13
|
LL | let c = a % b == 0;
| ^^^^^
|
= note: double check for expected result especially when interoperating with different languages
= note: or consider using `rem_euclid` or similar function
= note: `-D clippy::modulo-arithmetic` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::modulo_arithmetic)]`
error: you are using modulo operator on types that might have different signs
--> $DIR/modulo_arithmetic.rs:7:13
|
LL | let c = a % b != 0;
| ^^^^^
|
= note: double check for expected result especially when interoperating with different languages
= note: or consider using `rem_euclid` or similar function
error: you are using modulo operator on types that might have different signs
--> $DIR/modulo_arithmetic.rs:8:18
|
LL | let c = 0 == a % b;
| ^^^^^
|
= note: double check for expected result especially when interoperating with different languages
= note: or consider using `rem_euclid` or similar function
error: you are using modulo operator on types that might have different signs
--> $DIR/modulo_arithmetic.rs:9:18
|
LL | let c = 0 != a % b;
| ^^^^^
|
= note: double check for expected result especially when interoperating with different languages
= note: or consider using `rem_euclid` or similar function
error: aborting due to 4 previous errors

6
tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr
View file

@ -3,6 +3,7 @@ error: error reading Clippy's configuration file: unknown field `foobar`, expect
absolute-paths-max-segments
accept-comment-above-attributes
accept-comment-above-statement
allow-comparison-to-zero
allow-dbg-in-tests
allow-expect-in-tests
allow-mixed-uninlined-format-args
@ -14,6 +15,7 @@ error: error reading Clippy's configuration file: unknown field `foobar`, expect
allowed-duplicate-crates
allowed-idents-below-min-chars
allowed-scripts
allowed-wildcard-imports
arithmetic-side-effects-allowed
arithmetic-side-effects-allowed-binary
arithmetic-side-effects-allowed-unary
@ -80,6 +82,7 @@ error: error reading Clippy's configuration file: unknown field `barfoo`, expect
absolute-paths-max-segments
accept-comment-above-attributes
accept-comment-above-statement
allow-comparison-to-zero
allow-dbg-in-tests
allow-expect-in-tests
allow-mixed-uninlined-format-args
@ -91,6 +94,7 @@ error: error reading Clippy's configuration file: unknown field `barfoo`, expect
allowed-duplicate-crates
allowed-idents-below-min-chars
allowed-scripts
allowed-wildcard-imports
arithmetic-side-effects-allowed
arithmetic-side-effects-allowed-binary
arithmetic-side-effects-allowed-unary
@ -157,6 +161,7 @@ error: error reading Clippy's configuration file: unknown field `allow_mixed_uni
absolute-paths-max-segments
accept-comment-above-attributes
accept-comment-above-statement
allow-comparison-to-zero
allow-dbg-in-tests
allow-expect-in-tests
allow-mixed-uninlined-format-args
@ -168,6 +173,7 @@ error: error reading Clippy's configuration file: unknown field `allow_mixed_uni
allowed-duplicate-crates
allowed-idents-below-min-chars
allowed-scripts
allowed-wildcard-imports
arithmetic-side-effects-allowed
arithmetic-side-effects-allowed-binary
arithmetic-side-effects-allowed-unary

3
tests/ui-toml/wildcard_imports/clippy.toml
View file

@ -1 +1,4 @@
warn-on-all-wildcard-imports = true
# This should be ignored since `warn-on-all-wildcard-imports` has higher precedence
allowed-wildcard-imports = ["utils"]

19
tests/ui-toml/wildcard_imports/wildcard_imports.fixed
View file

@ -3,9 +3,28 @@
mod prelude {
pub const FOO: u8 = 1;
}
mod utils {
pub const BAR: u8 = 1;
pub fn print() {}
}
mod my_crate {
pub mod utils {
pub fn my_util_fn() {}
}
}
use utils::{BAR, print};
//~^ ERROR: usage of wildcard import
use my_crate::utils::my_util_fn;
//~^ ERROR: usage of wildcard import
use prelude::FOO;
//~^ ERROR: usage of wildcard import
fn main() {
let _ = FOO;
let _ = BAR;
print();
my_util_fn();
}

19
tests/ui-toml/wildcard_imports/wildcard_imports.rs
View file

@ -3,9 +3,28 @@
mod prelude {
pub const FOO: u8 = 1;
}
mod utils {
pub const BAR: u8 = 1;
pub fn print() {}
}
mod my_crate {
pub mod utils {
pub fn my_util_fn() {}
}
}
use utils::*;
//~^ ERROR: usage of wildcard import
use my_crate::utils::*;
//~^ ERROR: usage of wildcard import
use prelude::*;
//~^ ERROR: usage of wildcard import
fn main() {
let _ = FOO;
let _ = BAR;
print();
my_util_fn();
}

20
tests/ui-toml/wildcard_imports/wildcard_imports.stderr
View file

@ -1,11 +1,23 @@
error: usage of wildcard import
--> $DIR/wildcard_imports.rs:6:5
--> $DIR/wildcard_imports.rs:18:5
|
LL | use prelude::*;
| ^^^^^^^^^^ help: try: `prelude::FOO`
LL | use utils::*;
| ^^^^^^^^ help: try: `utils::{BAR, print}`
|
= note: `-D clippy::wildcard-imports` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::wildcard_imports)]`
error: aborting due to 1 previous error
error: usage of wildcard import
--> $DIR/wildcard_imports.rs:20:5
|
LL | use my_crate::utils::*;
| ^^^^^^^^^^^^^^^^^^ help: try: `my_crate::utils::my_util_fn`
error: usage of wildcard import
--> $DIR/wildcard_imports.rs:22:5
|
LL | use prelude::*;
| ^^^^^^^^^^ help: try: `prelude::FOO`
error: aborting due to 3 previous errors

1
tests/ui-toml/wildcard_imports_whitelist/clippy.toml Normal file
View file

@ -0,0 +1 @@
allowed-wildcard-imports = ["utils"]

26
tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.fixed Normal file
View file

@ -0,0 +1,26 @@
#![warn(clippy::wildcard_imports)]
mod utils {
pub fn print() {}
}
mod utils_plus {
pub fn do_something() {}
}
mod my_crate {
pub mod utils {
pub fn my_util_fn() {}
}
}
use my_crate::utils::*;
use utils::*;
use utils_plus::do_something;
//~^ ERROR: usage of wildcard import
fn main() {
print();
my_util_fn();
do_something();
}

26
tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.rs Normal file
View file

@ -0,0 +1,26 @@
#![warn(clippy::wildcard_imports)]
mod utils {
pub fn print() {}
}
mod utils_plus {
pub fn do_something() {}
}
mod my_crate {
pub mod utils {
pub fn my_util_fn() {}
}
}
use my_crate::utils::*;
use utils::*;
use utils_plus::*;
//~^ ERROR: usage of wildcard import
fn main() {
print();
my_util_fn();
do_something();
}

11
tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.stderr Normal file
View file

@ -0,0 +1,11 @@
error: usage of wildcard import
--> $DIR/wildcard_imports.rs:19:5
|
LL | use utils_plus::*;
| ^^^^^^^^^^^^^ help: try: `utils_plus::do_something`
|
= note: `-D clippy::wildcard-imports` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::wildcard_imports)]`
error: aborting due to 1 previous error

1
tests/ui/borrow_as_ptr.fixed
View file

@ -5,6 +5,7 @@ fn a() -> i32 {
0
}
#[clippy::msrv = "1.75"]
fn main() {
let val = 1;
let _p = std::ptr::addr_of!(val);

1
tests/ui/borrow_as_ptr.rs
View file

@ -5,6 +5,7 @@ fn a() -> i32 {
0
}
#[clippy::msrv = "1.75"]
fn main() {
let val = 1;
let _p = &val as *const i32;

4
tests/ui/borrow_as_ptr.stderr
View file

@ -1,5 +1,5 @@
error: borrow as raw pointer
--> $DIR/borrow_as_ptr.rs:10:14
--> $DIR/borrow_as_ptr.rs:11:14
|
LL | let _p = &val as *const i32;
| ^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::addr_of!(val)`
@ -8,7 +8,7 @@ LL | let _p = &val as *const i32;
= help: to override `-D warnings` add `#[allow(clippy::borrow_as_ptr)]`
error: borrow as raw pointer
--> $DIR/borrow_as_ptr.rs:17:18
--> $DIR/borrow_as_ptr.rs:18:18
|
LL | let _p_mut = &mut val_mut as *mut i32;
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::addr_of_mut!(val_mut)`

1
tests/ui/borrow_as_ptr_no_std.fixed
View file

@ -2,6 +2,7 @@
#![feature(lang_items, start, libc)]
#![no_std]
#[clippy::msrv = "1.75"]
#[start]
fn main(_argc: isize, _argv: *const *const u8) -> isize {
let val = 1;

1
tests/ui/borrow_as_ptr_no_std.rs
View file

@ -2,6 +2,7 @@
#![feature(lang_items, start, libc)]
#![no_std]
#[clippy::msrv = "1.75"]
#[start]
fn main(_argc: isize, _argv: *const *const u8) -> isize {
let val = 1;

4
tests/ui/borrow_as_ptr_no_std.stderr
View file

@ -1,5 +1,5 @@
error: borrow as raw pointer
--> $DIR/borrow_as_ptr_no_std.rs:8:14
--> $DIR/borrow_as_ptr_no_std.rs:9:14
|
LL | let _p = &val as *const i32;
| ^^^^^^^^^^^^^^^^^^ help: try: `core::ptr::addr_of!(val)`
@ -8,7 +8,7 @@ LL | let _p = &val as *const i32;
= help: to override `-D warnings` add `#[allow(clippy::borrow_as_ptr)]`
error: borrow as raw pointer
--> $DIR/borrow_as_ptr_no_std.rs:11:18
--> $DIR/borrow_as_ptr_no_std.rs:12:18
|
LL | let _p_mut = &mut val_mut as *mut i32;
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `core::ptr::addr_of_mut!(val_mut)`

71
tests/ui/eta.fixed
View file

@ -346,6 +346,23 @@ fn angle_brackets_and_args() {
dyn_opt.map(<dyn TestTrait>::method_on_dyn);
}
// https://github.com/rust-lang/rust-clippy/issues/12199
fn track_caller_fp() {
struct S;
impl S {
#[track_caller]
fn add_location(self) {}
}
#[track_caller]
fn add_location() {}
fn foo(_: fn()) {}
fn foo2(_: fn(S)) {}
foo(|| add_location());
foo2(|s| s.add_location());
}
fn _late_bound_to_early_bound_regions() {
struct Foo<'a>(&'a u32);
impl<'a> Foo<'a> {
@ -400,3 +417,57 @@ fn _closure_with_types() {
let _ = f2(|x: u32| f(x));
let _ = f2(|x| -> u32 { f(x) });
}
/// https://github.com/rust-lang/rust-clippy/issues/10854
/// This is to verify that redundant_closure_for_method_calls resolves suggested paths to relative.
mod issue_10854 {
pub mod test_mod {
pub struct Test;
impl Test {
pub fn method(self) -> i32 {
0
}
}
pub fn calls_test(test: Option<Test>) -> Option<i32> {
test.map(Test::method)
}
pub fn calls_outer(test: Option<super::Outer>) -> Option<i32> {
test.map(super::Outer::method)
}
}
pub struct Outer;
impl Outer {
pub fn method(self) -> i32 {
0
}
}
pub fn calls_into_mod(test: Option<test_mod::Test>) -> Option<i32> {
test.map(test_mod::Test::method)
}
mod a {
pub mod b {
pub mod c {
pub fn extreme_nesting(test: Option<super::super::super::d::Test>) -> Option<i32> {
test.map(crate::issue_10854::d::Test::method)
}
}
}
}
mod d {
pub struct Test;
impl Test {
pub fn method(self) -> i32 {
0
}
}
}
}

71
tests/ui/eta.rs
View file

@ -346,6 +346,23 @@ fn angle_brackets_and_args() {
dyn_opt.map(|d| d.method_on_dyn());
}
// https://github.com/rust-lang/rust-clippy/issues/12199
fn track_caller_fp() {
struct S;
impl S {
#[track_caller]
fn add_location(self) {}
}
#[track_caller]
fn add_location() {}
fn foo(_: fn()) {}
fn foo2(_: fn(S)) {}
foo(|| add_location());
foo2(|s| s.add_location());
}
fn _late_bound_to_early_bound_regions() {
struct Foo<'a>(&'a u32);
impl<'a> Foo<'a> {
@ -400,3 +417,57 @@ fn _closure_with_types() {
let _ = f2(|x: u32| f(x));
let _ = f2(|x| -> u32 { f(x) });
}
/// https://github.com/rust-lang/rust-clippy/issues/10854
/// This is to verify that redundant_closure_for_method_calls resolves suggested paths to relative.
mod issue_10854 {
pub mod test_mod {
pub struct Test;
impl Test {
pub fn method(self) -> i32 {
0
}
}
pub fn calls_test(test: Option<Test>) -> Option<i32> {
test.map(|t| t.method())
}
pub fn calls_outer(test: Option<super::Outer>) -> Option<i32> {
test.map(|t| t.method())
}
}
pub struct Outer;
impl Outer {
pub fn method(self) -> i32 {
0
}
}
pub fn calls_into_mod(test: Option<test_mod::Test>) -> Option<i32> {
test.map(|t| t.method())
}
mod a {
pub mod b {
pub mod c {
pub fn extreme_nesting(test: Option<super::super::super::d::Test>) -> Option<i32> {
test.map(|t| t.method())
}
}
}
}
mod d {
pub struct Test;
impl Test {
pub fn method(self) -> i32 {
0
}
}
}
}

28
tests/ui/eta.stderr
View file

@ -161,10 +161,34 @@ LL | dyn_opt.map(|d| d.method_on_dyn());
| ^^^^^^^^^^^^^^^^^^^^^ help: replace the closure with the method itself: `<dyn TestTrait>::method_on_dyn`
error: redundant closure
--> $DIR/eta.rs:389:19
--> $DIR/eta.rs:406:19
|
LL | let _ = f(&0, |x, y| f2(x, y));
| ^^^^^^^^^^^^^^^ help: replace the closure with the function itself: `f2`
error: aborting due to 27 previous errors
error: redundant closure
--> $DIR/eta.rs:434:22
|
LL | test.map(|t| t.method())
| ^^^^^^^^^^^^^^ help: replace the closure with the method itself: `Test::method`
error: redundant closure
--> $DIR/eta.rs:438:22
|
LL | test.map(|t| t.method())
| ^^^^^^^^^^^^^^ help: replace the closure with the method itself: `super::Outer::method`
error: redundant closure
--> $DIR/eta.rs:451:18
|
LL | test.map(|t| t.method())
| ^^^^^^^^^^^^^^ help: replace the closure with the method itself: `test_mod::Test::method`
error: redundant closure
--> $DIR/eta.rs:458:30
|
LL | test.map(|t| t.method())
| ^^^^^^^^^^^^^^ help: replace the closure with the method itself: `crate::issue_10854::d::Test::method`
error: aborting due to 31 previous errors

1
tests/ui/format_args.fixed
View file

@ -14,6 +14,7 @@ use std::panic::Location;
struct Somewhere;
#[allow(clippy::to_string_trait_impl)]
impl ToString for Somewhere {
fn to_string(&self) -> String {
String::from("somewhere")

1
tests/ui/format_args.rs
View file

@ -14,6 +14,7 @@ use std::panic::Location;
struct Somewhere;
#[allow(clippy::to_string_trait_impl)]
impl ToString for Somewhere {
fn to_string(&self) -> String {
String::from("somewhere")

50
tests/ui/format_args.stderr
View file

@ -1,5 +1,5 @@
error: `to_string` applied to a type that implements `Display` in `format!` args
--> $DIR/format_args.rs:76:72
--> $DIR/format_args.rs:77:72
|
LL | let _ = format!("error: something failed at {}", Location::caller().to_string());
| ^^^^^^^^^^^^ help: remove this
@ -8,145 +8,145 @@ LL | let _ = format!("error: something failed at {}", Location::caller().to_
= help: to override `-D warnings` add `#[allow(clippy::to_string_in_format_args)]`
error: `to_string` applied to a type that implements `Display` in `write!` args
--> $DIR/format_args.rs:80:27
--> $DIR/format_args.rs:81:27
|
LL | Location::caller().to_string()
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `writeln!` args
--> $DIR/format_args.rs:85:27
--> $DIR/format_args.rs:86:27
|
LL | Location::caller().to_string()
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `print!` args
--> $DIR/format_args.rs:87:63
--> $DIR/format_args.rs:88:63
|
LL | print!("error: something failed at {}", Location::caller().to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:88:65
--> $DIR/format_args.rs:89:65
|
LL | println!("error: something failed at {}", Location::caller().to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `eprint!` args
--> $DIR/format_args.rs:89:64
--> $DIR/format_args.rs:90:64
|
LL | eprint!("error: something failed at {}", Location::caller().to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `eprintln!` args
--> $DIR/format_args.rs:90:66
--> $DIR/format_args.rs:91:66
|
LL | eprintln!("error: something failed at {}", Location::caller().to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `format_args!` args
--> $DIR/format_args.rs:91:77
--> $DIR/format_args.rs:92:77
|
LL | let _ = format_args!("error: something failed at {}", Location::caller().to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `assert!` args
--> $DIR/format_args.rs:92:70
--> $DIR/format_args.rs:93:70
|
LL | assert!(true, "error: something failed at {}", Location::caller().to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `assert_eq!` args
--> $DIR/format_args.rs:93:73
--> $DIR/format_args.rs:94:73
|
LL | assert_eq!(0, 0, "error: something failed at {}", Location::caller().to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `assert_ne!` args
--> $DIR/format_args.rs:94:73
--> $DIR/format_args.rs:95:73
|
LL | assert_ne!(0, 0, "error: something failed at {}", Location::caller().to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `panic!` args
--> $DIR/format_args.rs:95:63
--> $DIR/format_args.rs:96:63
|
LL | panic!("error: something failed at {}", Location::caller().to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:96:20
--> $DIR/format_args.rs:97:20
|
LL | println!("{}", X(1).to_string());
| ^^^^^^^^^^^^^^^^ help: use this: `*X(1)`
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:97:20
--> $DIR/format_args.rs:98:20
|
LL | println!("{}", Y(&X(1)).to_string());
| ^^^^^^^^^^^^^^^^^^^^ help: use this: `***Y(&X(1))`
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:98:24
--> $DIR/format_args.rs:99:24
|
LL | println!("{}", Z(1).to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:99:20
--> $DIR/format_args.rs:100:20
|
LL | println!("{}", x.to_string());
| ^^^^^^^^^^^^^ help: use this: `**x`
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:100:20
--> $DIR/format_args.rs:101:20
|
LL | println!("{}", x_ref.to_string());
| ^^^^^^^^^^^^^^^^^ help: use this: `***x_ref`
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:102:39
--> $DIR/format_args.rs:103:39
|
LL | println!("{foo}{bar}", foo = "foo".to_string(), bar = "bar");
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:103:52
--> $DIR/format_args.rs:104:52
|
LL | println!("{foo}{bar}", foo = "foo", bar = "bar".to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:104:39
--> $DIR/format_args.rs:105:39
|
LL | println!("{foo}{bar}", bar = "bar".to_string(), foo = "foo");
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:105:52
--> $DIR/format_args.rs:106:52
|
LL | println!("{foo}{bar}", bar = "bar", foo = "foo".to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `print!` args
--> $DIR/format_args.rs:117:37
--> $DIR/format_args.rs:118:37
|
LL | print!("{}", (Location::caller().to_string()));
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `print!` args
--> $DIR/format_args.rs:118:39
--> $DIR/format_args.rs:119:39
|
LL | print!("{}", ((Location::caller()).to_string()));
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `format!` args
--> $DIR/format_args.rs:146:38
--> $DIR/format_args.rs:147:38
|
LL | let x = format!("{} {}", a, b.to_string());
| ^^^^^^^^^^^^ help: remove this
error: `to_string` applied to a type that implements `Display` in `println!` args
--> $DIR/format_args.rs:160:24
--> $DIR/format_args.rs:161:24
|
LL | println!("{}", original[..10].to_string());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use this: `&original[..10]`

7
tests/ui/ignored_unit_patterns.fixed
View file

@ -1,6 +1,11 @@
//@aux-build:proc_macro_derive.rs
#![warn(clippy::ignored_unit_patterns)]
#![allow(clippy::let_unit_value, clippy::redundant_pattern_matching, clippy::single_match)]
#![allow(
clippy::let_unit_value,
clippy::redundant_pattern_matching,
clippy::single_match,
clippy::needless_borrow
)]
fn foo() -> Result<(), ()> {
unimplemented!()

7
tests/ui/ignored_unit_patterns.rs
View file

@ -1,6 +1,11 @@
//@aux-build:proc_macro_derive.rs
#![warn(clippy::ignored_unit_patterns)]
#![allow(clippy::let_unit_value, clippy::redundant_pattern_matching, clippy::single_match)]
#![allow(
clippy::let_unit_value,
clippy::redundant_pattern_matching,
clippy::single_match,
clippy::needless_borrow
)]
fn foo() -> Result<(), ()> {
unimplemented!()

18
tests/ui/ignored_unit_patterns.stderr
View file

@ -1,5 +1,5 @@
error: matching over `()` is more explicit
--> $DIR/ignored_unit_patterns.rs:11:12
--> $DIR/ignored_unit_patterns.rs:16:12
|
LL | Ok(_) => {},
| ^ help: use `()` instead of `_`: `()`
@ -8,49 +8,49 @@ LL | Ok(_) => {},
= help: to override `-D warnings` add `#[allow(clippy::ignored_unit_patterns)]`
error: matching over `()` is more explicit
--> $DIR/ignored_unit_patterns.rs:12:13
--> $DIR/ignored_unit_patterns.rs:17:13
|
LL | Err(_) => {},
| ^ help: use `()` instead of `_`: `()`
error: matching over `()` is more explicit
--> $DIR/ignored_unit_patterns.rs:14:15
--> $DIR/ignored_unit_patterns.rs:19:15
|
LL | if let Ok(_) = foo() {}
| ^ help: use `()` instead of `_`: `()`
error: matching over `()` is more explicit
--> $DIR/ignored_unit_patterns.rs:16:28
--> $DIR/ignored_unit_patterns.rs:21:28
|
LL | let _ = foo().map_err(|_| todo!());
| ^ help: use `()` instead of `_`: `()`
error: matching over `()` is more explicit
--> $DIR/ignored_unit_patterns.rs:22:16
--> $DIR/ignored_unit_patterns.rs:27:16
|
LL | Ok(_) => {},
| ^ help: use `()` instead of `_`: `()`
error: matching over `()` is more explicit
--> $DIR/ignored_unit_patterns.rs:24:17
--> $DIR/ignored_unit_patterns.rs:29:17
|
LL | Err(_) => {},
| ^ help: use `()` instead of `_`: `()`
error: matching over `()` is more explicit
--> $DIR/ignored_unit_patterns.rs:36:9
--> $DIR/ignored_unit_patterns.rs:41:9
|
LL | let _ = foo().unwrap();
| ^ help: use `()` instead of `_`: `()`
error: matching over `()` is more explicit
--> $DIR/ignored_unit_patterns.rs:45:13
--> $DIR/ignored_unit_patterns.rs:50:13
|
LL | (1, _) => unimplemented!(),
| ^ help: use `()` instead of `_`: `()`
error: matching over `()` is more explicit
--> $DIR/ignored_unit_patterns.rs:52:13
--> $DIR/ignored_unit_patterns.rs:57:13
|
LL | for (x, _) in v {
| ^ help: use `()` instead of `_`: `()`

23
tests/ui/incompatible_msrv.rs Normal file
View file

@ -0,0 +1,23 @@
#![warn(clippy::incompatible_msrv)]
#![feature(custom_inner_attributes)]
#![clippy::msrv = "1.3.0"]
use std::collections::hash_map::Entry;
use std::collections::HashMap;
use std::thread::sleep;
use std::time::Duration;
fn foo() {
let mut map: HashMap<&str, u32> = HashMap::new();
assert_eq!(map.entry("poneyland").key(), &"poneyland");
//~^ ERROR: is `1.3.0` but this item is stable since `1.10.0`
if let Entry::Vacant(v) = map.entry("poneyland") {
v.into_key();
//~^ ERROR: is `1.3.0` but this item is stable since `1.12.0`
}
// Should warn for `sleep` but not for `Duration` (which was added in `1.3.0`).
sleep(Duration::new(1, 0));
//~^ ERROR: is `1.3.0` but this item is stable since `1.4.0`
}
fn main() {}

23
tests/ui/incompatible_msrv.stderr Normal file
View file

@ -0,0 +1,23 @@
error: current MSRV (Minimum Supported Rust Version) is `1.3.0` but this item is stable since `1.10.0`
--> $DIR/incompatible_msrv.rs:12:39
|
LL | assert_eq!(map.entry("poneyland").key(), &"poneyland");
| ^^^^^
|
= note: `-D clippy::incompatible-msrv` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::incompatible_msrv)]`
error: current MSRV (Minimum Supported Rust Version) is `1.3.0` but this item is stable since `1.12.0`
--> $DIR/incompatible_msrv.rs:15:11
|
LL | v.into_key();
| ^^^^^^^^^^
error: current MSRV (Minimum Supported Rust Version) is `1.3.0` but this item is stable since `1.4.0`
--> $DIR/incompatible_msrv.rs:19:5
|
LL | sleep(Duration::new(1, 0));
| ^^^^^
error: aborting due to 3 previous errors

60
tests/ui/manual_c_str_literals.fixed Normal file
View file

@ -0,0 +1,60 @@
#![warn(clippy::manual_c_str_literals)]
#![allow(clippy::no_effect)]
use std::ffi::CStr;
macro_rules! cstr {
($s:literal) => {
CStr::from_bytes_with_nul(concat!($s, "\0").as_bytes()).unwrap()
};
}
macro_rules! macro_returns_c_str {
() => {
CStr::from_bytes_with_nul(b"foo\0").unwrap();
};
}
macro_rules! macro_returns_byte_string {
() => {
b"foo\0"
};
}
#[clippy::msrv = "1.76.0"]
fn pre_stabilization() {
CStr::from_bytes_with_nul(b"foo\0");
}
#[clippy::msrv = "1.77.0"]
fn post_stabilization() {
c"foo";
}
fn main() {
c"foo";
c"foo";
c"foo";
c"foo\\0sdsd";
CStr::from_bytes_with_nul(br"foo\\0sdsd\0").unwrap();
CStr::from_bytes_with_nul(br"foo\x00").unwrap();
CStr::from_bytes_with_nul(br##"foo#a\0"##).unwrap();
unsafe { c"foo" };
unsafe { c"foo" };
let _: *const _ = c"foo".as_ptr();
let _: *const _ = c"foo".as_ptr();
let _: *const _ = "foo".as_ptr(); // not a C-string
let _: *const _ = "".as_ptr();
let _: *const _ = c"foo".as_ptr().cast::<i8>();
let _ = "电脑".as_ptr();
let _ = "电脑\\".as_ptr();
let _ = c"电脑\\".as_ptr();
let _ = c"电脑".as_ptr();
let _ = c"电脑".as_ptr();
// Macro cases, don't lint:
cstr!("foo");
macro_returns_c_str!();
CStr::from_bytes_with_nul(macro_returns_byte_string!()).unwrap();
}

60
tests/ui/manual_c_str_literals.rs Normal file
View file

@ -0,0 +1,60 @@
#![warn(clippy::manual_c_str_literals)]
#![allow(clippy::no_effect)]
use std::ffi::CStr;
macro_rules! cstr {
($s:literal) => {
CStr::from_bytes_with_nul(concat!($s, "\0").as_bytes()).unwrap()
};
}
macro_rules! macro_returns_c_str {
() => {
CStr::from_bytes_with_nul(b"foo\0").unwrap();
};
}
macro_rules! macro_returns_byte_string {
() => {
b"foo\0"
};
}
#[clippy::msrv = "1.76.0"]
fn pre_stabilization() {
CStr::from_bytes_with_nul(b"foo\0");
}
#[clippy::msrv = "1.77.0"]
fn post_stabilization() {
CStr::from_bytes_with_nul(b"foo\0");
}
fn main() {
CStr::from_bytes_with_nul(b"foo\0");
CStr::from_bytes_with_nul(b"foo\x00");
CStr::from_bytes_with_nul(b"foo\0").unwrap();
CStr::from_bytes_with_nul(b"foo\\0sdsd\0").unwrap();
CStr::from_bytes_with_nul(br"foo\\0sdsd\0").unwrap();
CStr::from_bytes_with_nul(br"foo\x00").unwrap();
CStr::from_bytes_with_nul(br##"foo#a\0"##).unwrap();
unsafe { CStr::from_ptr(b"foo\0".as_ptr().cast()) };
unsafe { CStr::from_ptr(b"foo\0".as_ptr() as *const _) };
let _: *const _ = b"foo\0".as_ptr();
let _: *const _ = "foo\0".as_ptr();
let _: *const _ = "foo".as_ptr(); // not a C-string
let _: *const _ = "".as_ptr();
let _: *const _ = b"foo\0".as_ptr().cast::<i8>();
let _ = "电脑".as_ptr();
let _ = "电脑\\".as_ptr();
let _ = "电脑\\\0".as_ptr();
let _ = "电脑\0".as_ptr();
let _ = "电脑\x00".as_ptr();
// Macro cases, don't lint:
cstr!("foo");
macro_returns_c_str!();
CStr::from_bytes_with_nul(macro_returns_byte_string!()).unwrap();
}

83
tests/ui/manual_c_str_literals.stderr Normal file
View file

@ -0,0 +1,83 @@
error: calling `CStr::new` with a byte string literal
--> $DIR/manual_c_str_literals.rs:31:5
|
LL | CStr::from_bytes_with_nul(b"foo\0");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a `c""` literal: `c"foo"`
|
= note: `-D clippy::manual-c-str-literals` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::manual_c_str_literals)]`
error: calling `CStr::new` with a byte string literal
--> $DIR/manual_c_str_literals.rs:35:5
|
LL | CStr::from_bytes_with_nul(b"foo\0");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a `c""` literal: `c"foo"`
error: calling `CStr::new` with a byte string literal
--> $DIR/manual_c_str_literals.rs:36:5
|
LL | CStr::from_bytes_with_nul(b"foo\x00");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a `c""` literal: `c"foo"`
error: calling `CStr::new` with a byte string literal
--> $DIR/manual_c_str_literals.rs:37:5
|
LL | CStr::from_bytes_with_nul(b"foo\0").unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a `c""` literal: `c"foo"`
error: calling `CStr::new` with a byte string literal
--> $DIR/manual_c_str_literals.rs:38:5
|
LL | CStr::from_bytes_with_nul(b"foo\\0sdsd\0").unwrap();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a `c""` literal: `c"foo\\0sdsd"`
error: calling `CStr::from_ptr` with a byte string literal
--> $DIR/manual_c_str_literals.rs:43:14
|
LL | unsafe { CStr::from_ptr(b"foo\0".as_ptr().cast()) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a `c""` literal: `c"foo"`
error: calling `CStr::from_ptr` with a byte string literal
--> $DIR/manual_c_str_literals.rs:44:14
|
LL | unsafe { CStr::from_ptr(b"foo\0".as_ptr() as *const _) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use a `c""` literal: `c"foo"`
error: manually constructing a nul-terminated string
--> $DIR/manual_c_str_literals.rs:45:23
|
LL | let _: *const _ = b"foo\0".as_ptr();
| ^^^^^^^^ help: use a `c""` literal: `c"foo"`
error: manually constructing a nul-terminated string
--> $DIR/manual_c_str_literals.rs:46:23
|
LL | let _: *const _ = "foo\0".as_ptr();
| ^^^^^^^ help: use a `c""` literal: `c"foo"`
error: manually constructing a nul-terminated string
--> $DIR/manual_c_str_literals.rs:49:23
|
LL | let _: *const _ = b"foo\0".as_ptr().cast::<i8>();
| ^^^^^^^^ help: use a `c""` literal: `c"foo"`
error: manually constructing a nul-terminated string
--> $DIR/manual_c_str_literals.rs:52:13
|
LL | let _ = "电脑\\\0".as_ptr();
| ^^^^^^^^^^ help: use a `c""` literal: `c"电脑\\"`
error: manually constructing a nul-terminated string
--> $DIR/manual_c_str_literals.rs:53:13
|
LL | let _ = "电脑\0".as_ptr();
| ^^^^^^^^ help: use a `c""` literal: `c"电脑"`
error: manually constructing a nul-terminated string
--> $DIR/manual_c_str_literals.rs:54:13
|
LL | let _ = "电脑\x00".as_ptr();
| ^^^^^^^^^^ help: use a `c""` literal: `c"电脑"`
error: aborting due to 13 previous errors

63
tests/ui/manual_retain.fixed
View file

@ -14,6 +14,9 @@ fn main() {
_msrv_153();
_msrv_126();
_msrv_118();
issue_10393();
issue_12081();
}
fn binary_heap_retain() {
@ -23,6 +26,11 @@ fn binary_heap_retain() {
binary_heap.retain(|x| x % 2 == 0);
binary_heap.retain(|x| x % 2 == 0);
// Do lint, because we use pattern matching
let mut tuples = BinaryHeap::from([(0, 1), (1, 2), (2, 3)]);
tuples.retain(|(ref x, ref y)| *x == 0);
tuples.retain(|(x, y)| *x == 0);
// Do not lint, because type conversion is performed
binary_heap = binary_heap
.into_iter()
@ -55,6 +63,9 @@ fn btree_map_retain() {
btree_map.retain(|_, &mut v| v % 2 == 0);
btree_map.retain(|k, &mut v| (k % 2 == 0) && (v % 2 == 0));
// Do not lint, because the parameters are not matched in tuple pattern
btree_map = btree_map.into_iter().filter(|t| t.0 % 2 == 0).collect();
// Do not lint.
btree_map = btree_map
.into_iter()
@ -76,6 +87,11 @@ fn btree_set_retain() {
btree_set.retain(|x| x % 2 == 0);
btree_set.retain(|x| x % 2 == 0);
// Do lint, because we use pattern matching
let mut tuples = BTreeSet::from([(0, 1), (1, 2), (2, 3)]);
tuples.retain(|(ref x, ref y)| *x == 0);
tuples.retain(|(x, y)| *x == 0);
// Do not lint, because type conversion is performed
btree_set = btree_set
.iter()
@ -108,6 +124,9 @@ fn hash_map_retain() {
hash_map.retain(|_, &mut v| v % 2 == 0);
hash_map.retain(|k, &mut v| (k % 2 == 0) && (v % 2 == 0));
// Do not lint, because the parameters are not matched in tuple pattern
hash_map = hash_map.into_iter().filter(|t| t.0 % 2 == 0).collect();
// Do not lint.
hash_map = hash_map
.into_iter()
@ -128,6 +147,11 @@ fn hash_set_retain() {
hash_set.retain(|x| x % 2 == 0);
hash_set.retain(|x| x % 2 == 0);
// Do lint, because we use pattern matching
let mut tuples = HashSet::from([(0, 1), (1, 2), (2, 3)]);
tuples.retain(|(ref x, ref y)| *x == 0);
tuples.retain(|(x, y)| *x == 0);
// Do not lint, because type conversion is performed
hash_set = hash_set.into_iter().filter(|x| x % 2 == 0).collect::<HashSet<i8>>();
hash_set = hash_set
@ -171,6 +195,11 @@ fn vec_retain() {
vec.retain(|x| x % 2 == 0);
vec.retain(|x| x % 2 == 0);
// Do lint, because we use pattern matching
let mut tuples = vec![(0, 1), (1, 2), (2, 3)];
tuples.retain(|(ref x, ref y)| *x == 0);
tuples.retain(|(x, y)| *x == 0);
// Do not lint, because type conversion is performed
vec = vec.into_iter().filter(|x| x % 2 == 0).collect::<Vec<i8>>();
vec = vec.iter().filter(|&x| x % 2 == 0).copied().collect::<Vec<i8>>();
@ -246,3 +275,37 @@ fn _msrv_118() {
let mut hash_map: HashMap<i8, i8> = (0..8).map(|x| (x, x * 10)).collect();
hash_map = hash_map.into_iter().filter(|(k, _)| k % 2 == 0).collect();
}
fn issue_10393() {
// Do lint
let mut vec = vec![(0, 1), (1, 2), (2, 3)];
vec.retain(|(x, y)| *x == 0);
// Do lint
let mut tuples = vec![(true, -2), (false, 3)];
tuples.retain(|(_, n)| *n > 0);
}
fn issue_11457() {
// Do not lint, as we need to modify the closure
let mut vals = vec![1, 2, 3, 4];
vals = vals.iter().filter(|v| **v != 1).cloned().collect();
// Do not lint, as we need to modify the closure
let mut s = String::from("foobar");
s = s.chars().filter(|c| *c != 'o').to_owned().collect();
}
fn issue_12081() {
let mut vec = vec![0, 1, 2];
// Do lint
vec.retain(|&x| x == 0);
vec.retain(|&x| x == 0);
vec.retain(|&x| x == 0);
// Do lint
vec.retain(|x| *x == 0);
vec.retain(|x| *x == 0);
vec.retain(|x| *x == 0);
}

63
tests/ui/manual_retain.rs
View file

@ -14,6 +14,9 @@ fn main() {
_msrv_153();
_msrv_126();
_msrv_118();
issue_10393();
issue_12081();
}
fn binary_heap_retain() {
@ -23,6 +26,11 @@ fn binary_heap_retain() {
binary_heap = binary_heap.iter().filter(|&x| x % 2 == 0).copied().collect();
binary_heap = binary_heap.iter().filter(|&x| x % 2 == 0).cloned().collect();
// Do lint, because we use pattern matching
let mut tuples = BinaryHeap::from([(0, 1), (1, 2), (2, 3)]);
tuples = tuples.iter().filter(|(ref x, ref y)| *x == 0).copied().collect();
tuples = tuples.iter().filter(|(x, y)| *x == 0).copied().collect();
// Do not lint, because type conversion is performed
binary_heap = binary_heap
.into_iter()
@ -58,6 +66,9 @@ fn btree_map_retain() {
.filter(|(k, v)| (k % 2 == 0) && (v % 2 == 0))
.collect();
// Do not lint, because the parameters are not matched in tuple pattern
btree_map = btree_map.into_iter().filter(|t| t.0 % 2 == 0).collect();
// Do not lint.
btree_map = btree_map
.into_iter()
@ -79,6 +90,11 @@ fn btree_set_retain() {
btree_set = btree_set.iter().filter(|&x| x % 2 == 0).cloned().collect();
btree_set = btree_set.into_iter().filter(|x| x % 2 == 0).collect();
// Do lint, because we use pattern matching
let mut tuples = BTreeSet::from([(0, 1), (1, 2), (2, 3)]);
tuples = tuples.iter().filter(|(ref x, ref y)| *x == 0).copied().collect();
tuples = tuples.iter().filter(|(x, y)| *x == 0).copied().collect();
// Do not lint, because type conversion is performed
btree_set = btree_set
.iter()
@ -114,6 +130,9 @@ fn hash_map_retain() {
.filter(|(k, v)| (k % 2 == 0) && (v % 2 == 0))
.collect();
// Do not lint, because the parameters are not matched in tuple pattern
hash_map = hash_map.into_iter().filter(|t| t.0 % 2 == 0).collect();
// Do not lint.
hash_map = hash_map
.into_iter()
@ -134,6 +153,11 @@ fn hash_set_retain() {
hash_set = hash_set.iter().filter(|&x| x % 2 == 0).copied().collect();
hash_set = hash_set.iter().filter(|&x| x % 2 == 0).cloned().collect();
// Do lint, because we use pattern matching
let mut tuples = HashSet::from([(0, 1), (1, 2), (2, 3)]);
tuples = tuples.iter().filter(|(ref x, ref y)| *x == 0).copied().collect();
tuples = tuples.iter().filter(|(x, y)| *x == 0).copied().collect();
// Do not lint, because type conversion is performed
hash_set = hash_set.into_iter().filter(|x| x % 2 == 0).collect::<HashSet<i8>>();
hash_set = hash_set
@ -177,6 +201,11 @@ fn vec_retain() {
vec = vec.iter().filter(|&x| x % 2 == 0).cloned().collect();
vec = vec.into_iter().filter(|x| x % 2 == 0).collect();
// Do lint, because we use pattern matching
let mut tuples = vec![(0, 1), (1, 2), (2, 3)];
tuples = tuples.iter().filter(|(ref x, ref y)| *x == 0).copied().collect();
tuples = tuples.iter().filter(|(x, y)| *x == 0).copied().collect();
// Do not lint, because type conversion is performed
vec = vec.into_iter().filter(|x| x % 2 == 0).collect::<Vec<i8>>();
vec = vec.iter().filter(|&x| x % 2 == 0).copied().collect::<Vec<i8>>();
@ -252,3 +281,37 @@ fn _msrv_118() {
let mut hash_map: HashMap<i8, i8> = (0..8).map(|x| (x, x * 10)).collect();
hash_map = hash_map.into_iter().filter(|(k, _)| k % 2 == 0).collect();
}
fn issue_10393() {
// Do lint
let mut vec = vec![(0, 1), (1, 2), (2, 3)];
vec = vec.into_iter().filter(|(x, y)| *x == 0).collect();
// Do lint
let mut tuples = vec![(true, -2), (false, 3)];
tuples = tuples.into_iter().filter(|(_, n)| *n > 0).collect();
}
fn issue_11457() {
// Do not lint, as we need to modify the closure
let mut vals = vec![1, 2, 3, 4];
vals = vals.iter().filter(|v| **v != 1).cloned().collect();
// Do not lint, as we need to modify the closure
let mut s = String::from("foobar");
s = s.chars().filter(|c| *c != 'o').to_owned().collect();
}
fn issue_12081() {
let mut vec = vec![0, 1, 2];
// Do lint
vec = vec.iter().filter(|&&x| x == 0).copied().collect();
vec = vec.iter().filter(|&&x| x == 0).cloned().collect();
vec = vec.into_iter().filter(|&x| x == 0).collect();
// Do lint
vec = vec.iter().filter(|&x| *x == 0).copied().collect();
vec = vec.iter().filter(|&x| *x == 0).cloned().collect();
vec = vec.into_iter().filter(|x| *x == 0).collect();
}

142
tests/ui/manual_retain.stderr
View file

@ -1,5 +1,5 @@
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:22:5
--> $DIR/manual_retain.rs:25:5
|
LL | binary_heap = binary_heap.into_iter().filter(|x| x % 2 == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `binary_heap.retain(|x| x % 2 == 0)`
@ -8,31 +8,43 @@ LL | binary_heap = binary_heap.into_iter().filter(|x| x % 2 == 0).collect();
= help: to override `-D warnings` add `#[allow(clippy::manual_retain)]`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:23:5
--> $DIR/manual_retain.rs:26:5
|
LL | binary_heap = binary_heap.iter().filter(|&x| x % 2 == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `binary_heap.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:24:5
--> $DIR/manual_retain.rs:27:5
|
LL | binary_heap = binary_heap.iter().filter(|&x| x % 2 == 0).cloned().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `binary_heap.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:54:5
--> $DIR/manual_retain.rs:31:5
|
LL | tuples = tuples.iter().filter(|(ref x, ref y)| *x == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `tuples.retain(|(ref x, ref y)| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:32:5
|
LL | tuples = tuples.iter().filter(|(x, y)| *x == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `tuples.retain(|(x, y)| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:62:5
|
LL | btree_map = btree_map.into_iter().filter(|(k, _)| k % 2 == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `btree_map.retain(|k, _| k % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:55:5
--> $DIR/manual_retain.rs:63:5
|
LL | btree_map = btree_map.into_iter().filter(|(_, v)| v % 2 == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `btree_map.retain(|_, &mut v| v % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:56:5
--> $DIR/manual_retain.rs:64:5
|
LL | / btree_map = btree_map
LL | | .into_iter()
@ -41,37 +53,49 @@ LL | | .collect();
| |__________________^ help: consider calling `.retain()` instead: `btree_map.retain(|k, &mut v| (k % 2 == 0) && (v % 2 == 0))`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:78:5
--> $DIR/manual_retain.rs:89:5
|
LL | btree_set = btree_set.iter().filter(|&x| x % 2 == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `btree_set.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:79:5
--> $DIR/manual_retain.rs:90:5
|
LL | btree_set = btree_set.iter().filter(|&x| x % 2 == 0).cloned().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `btree_set.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:80:5
--> $DIR/manual_retain.rs:91:5
|
LL | btree_set = btree_set.into_iter().filter(|x| x % 2 == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `btree_set.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:110:5
--> $DIR/manual_retain.rs:95:5
|
LL | tuples = tuples.iter().filter(|(ref x, ref y)| *x == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `tuples.retain(|(ref x, ref y)| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:96:5
|
LL | tuples = tuples.iter().filter(|(x, y)| *x == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `tuples.retain(|(x, y)| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:126:5
|
LL | hash_map = hash_map.into_iter().filter(|(k, _)| k % 2 == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `hash_map.retain(|k, _| k % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:111:5
--> $DIR/manual_retain.rs:127:5
|
LL | hash_map = hash_map.into_iter().filter(|(_, v)| v % 2 == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `hash_map.retain(|_, &mut v| v % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:112:5
--> $DIR/manual_retain.rs:128:5
|
LL | / hash_map = hash_map
LL | | .into_iter()
@ -80,64 +104,136 @@ LL | | .collect();
| |__________________^ help: consider calling `.retain()` instead: `hash_map.retain(|k, &mut v| (k % 2 == 0) && (v % 2 == 0))`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:133:5
--> $DIR/manual_retain.rs:152:5
|
LL | hash_set = hash_set.into_iter().filter(|x| x % 2 == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `hash_set.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:134:5
--> $DIR/manual_retain.rs:153:5
|
LL | hash_set = hash_set.iter().filter(|&x| x % 2 == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `hash_set.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:135:5
--> $DIR/manual_retain.rs:154:5
|
LL | hash_set = hash_set.iter().filter(|&x| x % 2 == 0).cloned().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `hash_set.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:164:5
--> $DIR/manual_retain.rs:158:5
|
LL | tuples = tuples.iter().filter(|(ref x, ref y)| *x == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `tuples.retain(|(ref x, ref y)| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:159:5
|
LL | tuples = tuples.iter().filter(|(x, y)| *x == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `tuples.retain(|(x, y)| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:188:5
|
LL | s = s.chars().filter(|&c| c != 'o').to_owned().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `s.retain(|c| c != 'o')`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:176:5
--> $DIR/manual_retain.rs:200:5
|
LL | vec = vec.iter().filter(|&x| x % 2 == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:177:5
--> $DIR/manual_retain.rs:201:5
|
LL | vec = vec.iter().filter(|&x| x % 2 == 0).cloned().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:178:5
--> $DIR/manual_retain.rs:202:5
|
LL | vec = vec.into_iter().filter(|x| x % 2 == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:200:5
--> $DIR/manual_retain.rs:206:5
|
LL | tuples = tuples.iter().filter(|(ref x, ref y)| *x == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `tuples.retain(|(ref x, ref y)| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:207:5
|
LL | tuples = tuples.iter().filter(|(x, y)| *x == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `tuples.retain(|(x, y)| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:229:5
|
LL | vec_deque = vec_deque.iter().filter(|&x| x % 2 == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec_deque.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:201:5
--> $DIR/manual_retain.rs:230:5
|
LL | vec_deque = vec_deque.iter().filter(|&x| x % 2 == 0).cloned().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec_deque.retain(|x| x % 2 == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:202:5
--> $DIR/manual_retain.rs:231:5
|
LL | vec_deque = vec_deque.into_iter().filter(|x| x % 2 == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec_deque.retain(|x| x % 2 == 0)`
error: aborting due to 22 previous errors
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:288:5
|
LL | vec = vec.into_iter().filter(|(x, y)| *x == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec.retain(|(x, y)| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:292:5
|
LL | tuples = tuples.into_iter().filter(|(_, n)| *n > 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `tuples.retain(|(_, n)| *n > 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:309:5
|
LL | vec = vec.iter().filter(|&&x| x == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec.retain(|&x| x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:310:5
|
LL | vec = vec.iter().filter(|&&x| x == 0).cloned().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec.retain(|&x| x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:311:5
|
LL | vec = vec.into_iter().filter(|&x| x == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec.retain(|&x| x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:314:5
|
LL | vec = vec.iter().filter(|&x| *x == 0).copied().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec.retain(|x| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:315:5
|
LL | vec = vec.iter().filter(|&x| *x == 0).cloned().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec.retain(|x| *x == 0)`
error: this expression can be written more simply using `.retain()`
--> $DIR/manual_retain.rs:316:5
|
LL | vec = vec.into_iter().filter(|x| *x == 0).collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling `.retain()` instead: `vec.retain(|x| *x == 0)`
error: aborting due to 38 previous errors

8
tests/ui/modulo_arithmetic_integral.rs
View file

@ -114,4 +114,12 @@ fn main() {
a_usize % b_usize;
let mut a_usize: usize = 1;
a_usize %= 2;
// No lint when comparing to zero
let a = -1;
let mut b = 2;
let c = a % b == 0;
let c = 0 == a % b;
let c = a % b != 0;
let c = 0 != a % b;
}

3
tests/ui/needless_borrow.fixed
View file

@ -131,6 +131,9 @@ fn main() {
0
}
}
// issue #11786
let x: (&str,) = ("",);
}
#[allow(clippy::needless_borrowed_reference)]

3
tests/ui/needless_borrow.rs
View file

@ -131,6 +131,9 @@ fn main() {
0
}
}
// issue #11786
let x: (&str,) = (&"",);
}
#[allow(clippy::needless_borrowed_reference)]

20
tests/ui/needless_borrow.stderr
View file

@ -121,41 +121,47 @@ error: this expression creates a reference which is immediately dereferenced by
LL | (&&5).foo();
| ^^^^^ help: change this to: `(&5)`
error: this expression creates a reference which is immediately dereferenced by the compiler
--> $DIR/needless_borrow.rs:136:23
|
LL | let x: (&str,) = (&"",);
| ^^^ help: change this to: `""`
error: this expression borrows a value the compiler would automatically borrow
--> $DIR/needless_borrow.rs:175:13
--> $DIR/needless_borrow.rs:178:13
|
LL | (&self.f)()
| ^^^^^^^^^ help: change this to: `(self.f)`
error: this expression borrows a value the compiler would automatically borrow
--> $DIR/needless_borrow.rs:184:13
--> $DIR/needless_borrow.rs:187:13
|
LL | (&mut self.f)()
| ^^^^^^^^^^^^^ help: change this to: `(self.f)`
error: this expression borrows a value the compiler would automatically borrow
--> $DIR/needless_borrow.rs:221:22
--> $DIR/needless_borrow.rs:224:22
|
LL | let _ = &mut (&mut { x.u }).x;
| ^^^^^^^^^^^^^^ help: change this to: `{ x.u }`
error: this expression borrows a value the compiler would automatically borrow
--> $DIR/needless_borrow.rs:228:22
--> $DIR/needless_borrow.rs:231:22
|
LL | let _ = &mut (&mut { x.u }).x;
| ^^^^^^^^^^^^^^ help: change this to: `{ x.u }`
error: this expression borrows a value the compiler would automatically borrow
--> $DIR/needless_borrow.rs:232:22
--> $DIR/needless_borrow.rs:235:22
|
LL | let _ = &mut (&mut x.u).x;
| ^^^^^^^^^^ help: change this to: `x.u`
error: this expression borrows a value the compiler would automatically borrow
--> $DIR/needless_borrow.rs:233:22
--> $DIR/needless_borrow.rs:236:22
|
LL | let _ = &mut (&mut { x.u }).x;
| ^^^^^^^^^^^^^^ help: change this to: `{ x.u }`
error: aborting due to 26 previous errors
error: aborting due to 27 previous errors

50
tests/ui/needless_return_with_question_mark.fixed
View file

@ -77,3 +77,53 @@ fn issue11616() -> Result<(), ()> {
};
Ok(())
}
fn issue11982() {
mod bar {
pub struct Error;
pub fn foo(_: bool) -> Result<(), Error> {
Ok(())
}
}
pub struct Error;
impl From<bar::Error> for Error {
fn from(_: bar::Error) -> Self {
Error
}
}
fn foo(ok: bool) -> Result<(), Error> {
if !ok {
return bar::foo(ok).map(|_| Ok::<(), Error>(()))?;
};
Ok(())
}
}
fn issue11982_no_conversion() {
mod bar {
pub struct Error;
pub fn foo(_: bool) -> Result<(), Error> {
Ok(())
}
}
fn foo(ok: bool) -> Result<(), bar::Error> {
if !ok {
return bar::foo(ok).map(|_| Ok::<(), bar::Error>(()))?;
};
Ok(())
}
}
fn general_return() {
fn foo(ok: bool) -> Result<(), ()> {
let bar = Result::Ok(Result::<(), ()>::Ok(()));
if !ok {
return bar?;
};
Ok(())
}
}

50
tests/ui/needless_return_with_question_mark.rs
View file

@ -77,3 +77,53 @@ fn issue11616() -> Result<(), ()> {
};
Ok(())
}
fn issue11982() {
mod bar {
pub struct Error;
pub fn foo(_: bool) -> Result<(), Error> {
Ok(())
}
}
pub struct Error;
impl From<bar::Error> for Error {
fn from(_: bar::Error) -> Self {
Error
}
}
fn foo(ok: bool) -> Result<(), Error> {
if !ok {
return bar::foo(ok).map(|_| Ok::<(), Error>(()))?;
};
Ok(())
}
}
fn issue11982_no_conversion() {
mod bar {
pub struct Error;
pub fn foo(_: bool) -> Result<(), Error> {
Ok(())
}
}
fn foo(ok: bool) -> Result<(), bar::Error> {
if !ok {
return bar::foo(ok).map(|_| Ok::<(), bar::Error>(()))?;
};
Ok(())
}
}
fn general_return() {
fn foo(ok: bool) -> Result<(), ()> {
let bar = Result::Ok(Result::<(), ()>::Ok(()));
if !ok {
return bar?;
};
Ok(())
}
}

11
tests/ui/never_loop.rs
View file

@ -1,4 +1,4 @@
#![feature(inline_const)]
#![feature(inline_const, try_blocks)]
#![allow(
clippy::eq_op,
clippy::single_match,
@ -400,6 +400,15 @@ pub fn test32() {
}
}
pub fn issue12205() -> Option<()> {
loop {
let _: Option<_> = try {
None?;
return Some(());
};
}
}
fn main() {
test1();
test2();

11
tests/ui/nonminimal_bool.rs
View file

@ -145,3 +145,14 @@ fn issue10836() {
// Should not lint
let _: bool = !!Foo(true);
}
fn issue11932() {
let x: i32 = unimplemented!();
#[allow(clippy::nonminimal_bool)]
let _ = x % 2 == 0 || {
// Should not lint
assert!(x > 0);
x % 3 == 0
};
}

9
tests/ui/redundant_closure_call_fixable.fixed
View file

@ -102,3 +102,12 @@ mod issue11707 {
fn avoid_double_parens() {
std::convert::identity(13_i32 + 36_i32).leading_zeros();
}
fn fp_11274() {
macro_rules! m {
($closure:expr) => {
$closure(1)
};
}
m!(|x| println!("{x}"));
}

9
tests/ui/redundant_closure_call_fixable.rs
View file

@ -102,3 +102,12 @@ mod issue11707 {
fn avoid_double_parens() {
std::convert::identity((|| 13_i32 + 36_i32)()).leading_zeros();
}
fn fp_11274() {
macro_rules! m {
($closure:expr) => {
$closure(1)
};
}
m!(|x| println!("{x}"));
}

46
tests/ui/redundant_locals.rs
View file

@ -1,6 +1,7 @@
//@aux-build:proc_macros.rs
#![allow(unused, clippy::no_effect, clippy::needless_pass_by_ref_mut)]
#![warn(clippy::redundant_locals)]
#![feature(async_closure, coroutines)]
extern crate proc_macros;
use proc_macros::{external, with_span};
@ -163,3 +164,48 @@ fn drop_compose() {
let b = ComposeDrop { d: WithDrop(1) };
let a = a;
}
fn issue12225() {
fn assert_static<T: 'static>(_: T) {}
let v1 = String::new();
let v2 = String::new();
let v3 = String::new();
let v4 = String::new();
let v5 = String::new();
let v6 = String::new();
assert_static(|| {
let v1 = v1;
dbg!(&v1);
});
assert_static(async {
let v2 = v2;
dbg!(&v2);
});
assert_static(|| async {
let v3 = v3;
dbg!(&v3);
});
assert_static(async || {
let v4 = v4;
dbg!(&v4);
});
assert_static(static || {
let v5 = v5;
yield;
});
assert_static(|| {
let v6 = v6;
yield;
});
fn foo(a: &str, b: &str) {}
let do_not_move = String::new();
let things_to_move = vec!["a".to_string(), "b".to_string()];
let futures = things_to_move.into_iter().map(|move_me| async {
let move_me = move_me;
foo(&do_not_move, &move_me)
});
}

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