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| author | Matthias Krüger <matthias.krueger@famsik.de> | 2024-02-09 19:21:17 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-02-09 19:21:17 +0100 |
| commit | 5250abaeb84df7407bf9a2d887cbd30e1b2f96d0 (patch) | |
| tree | 369412322fc24f7eb2ab3098a5fe63290d10c64a /src | |
| parent | c874b1a42435e2a7ec249861271aad18350d7af6 (diff) | |
| parent | 4ec9eec9e83fb6a19b899247357e3d5dabfebc78 (diff) | |
| download | rust-5250abaeb84df7407bf9a2d887cbd30e1b2f96d0.tar.gz rust-5250abaeb84df7407bf9a2d887cbd30e1b2f96d0.zip | |
Rollup merge of #120806 - flip1995:clippy-subtree-update, r=Manishearth
Clippy subtree update r? `@Manishearth`
Diffstat (limited to 'src')
131 files changed, 3869 insertions, 604 deletions
diff --git a/src/tools/clippy/.github/driver.sh b/src/tools/clippy/.github/driver.sh index c05c6ecc115..40a2aad0f53 100644..100755 --- a/src/tools/clippy/.github/driver.sh +++ b/src/tools/clippy/.github/driver.sh @@ -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 diff --git a/src/tools/clippy/CHANGELOG.md b/src/tools/clippy/CHANGELOG.md index 5fa45ceeb39..9b853567219 100644 --- a/src/tools/clippy/CHANGELOG.md +++ b/src/tools/clippy/CHANGELOG.md @@ -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 --> diff --git a/src/tools/clippy/Cargo.toml b/src/tools/clippy/Cargo.toml index eda20531e40..321424880d1 100644 --- a/src/tools/clippy/Cargo.toml +++ b/src/tools/clippy/Cargo.toml @@ -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" diff --git a/src/tools/clippy/book/src/lint_configuration.md b/src/tools/clippy/book/src/lint_configuration.md index 7f7aff92bf1..f2357e2b5de 100644 --- a/src/tools/clippy/book/src/lint_configuration.md +++ b/src/tools/clippy/book/src/lint_configuration.md @@ -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) + + diff --git a/src/tools/clippy/clippy_config/Cargo.toml b/src/tools/clippy/clippy_config/Cargo.toml index 74b8e5eaa1c..2edc5ed592c 100644 --- a/src/tools/clippy/clippy_config/Cargo.toml +++ b/src/tools/clippy/clippy_config/Cargo.toml @@ -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 diff --git a/src/tools/clippy/clippy_config/src/conf.rs b/src/tools/clippy/clippy_config/src/conf.rs index 4e9ddbf8259..9741b94d504 100644 --- a/src/tools/clippy/clippy_config/src/conf.rs +++ b/src/tools/clippy/clippy_config/src/conf.rs @@ -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. diff --git a/src/tools/clippy/clippy_config/src/msrvs.rs b/src/tools/clippy/clippy_config/src/msrvs.rs index 72d5b9aff28..f4389db627d 100644 --- a/src/tools/clippy/clippy_config/src/msrvs.rs +++ b/src/tools/clippy/clippy_config/src/msrvs.rs @@ -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 diff --git a/src/tools/clippy/clippy_lints/Cargo.toml b/src/tools/clippy/clippy_lints/Cargo.toml index 416e9a680dd..6e6e315bb65 100644 --- a/src/tools/clippy/clippy_lints/Cargo.toml +++ b/src/tools/clippy/clippy_lints/Cargo.toml @@ -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" diff --git a/src/tools/clippy/clippy_lints/src/booleans.rs b/src/tools/clippy/clippy_lints/src/booleans.rs index e11f83f2260..2d1c250ace9 100644 --- a/src/tools/clippy/clippy_lints/src/booleans.rs +++ b/src/tools/clippy/clippy_lints/src/booleans.rs @@ -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 diff --git a/src/tools/clippy/clippy_lints/src/cargo/lint_groups_priority.rs b/src/tools/clippy/clippy_lints/src/cargo/lint_groups_priority.rs new file mode 100644 index 00000000000..a39b972b56a --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/cargo/lint_groups_priority.rs @@ -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); + } +} diff --git a/src/tools/clippy/clippy_lints/src/cargo/mod.rs b/src/tools/clippy/clippy_lints/src/cargo/mod.rs index d8107f61f37..95d5449781b 100644 --- a/src/tools/clippy/clippy_lints/src/cargo/mod.rs +++ b/src/tools/clippy/clippy_lints/src/cargo/mod.rs @@ -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)) diff --git a/src/tools/clippy/clippy_lints/src/casts/mod.rs b/src/tools/clippy/clippy_lints/src/casts/mod.rs index e05b8f66d86..14f2f4a7f59 100644 --- a/src/tools/clippy/clippy_lints/src/casts/mod.rs +++ b/src/tools/clippy/clippy_lints/src/casts/mod.rs @@ -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); } } diff --git a/src/tools/clippy/clippy_lints/src/casts/ref_as_ptr.rs b/src/tools/clippy/clippy_lints/src/casts/ref_as_ptr.rs new file mode 100644 index 00000000000..d600d2aec1b --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/casts/ref_as_ptr.rs @@ -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, + ); + } +} diff --git a/src/tools/clippy/clippy_lints/src/declared_lints.rs b/src/tools/clippy/clippy_lints/src/declared_lints.rs index 639edd8da30..0a5baabd973 100644 --- a/src/tools/clippy/clippy_lints/src/declared_lints.rs +++ b/src/tools/clippy/clippy_lints/src/declared_lints.rs @@ -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, diff --git a/src/tools/clippy/clippy_lints/src/doc/mod.rs b/src/tools/clippy/clippy_lints/src/doc/mod.rs index ba452775015..2b4ce6ddfaa 100644 --- a/src/tools/clippy/clippy_lints/src/doc/mod.rs +++ b/src/tools/clippy/clippy_lints/src/doc/mod.rs @@ -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" diff --git a/src/tools/clippy/clippy_lints/src/eta_reduction.rs b/src/tools/clippy/clippy_lints/src/eta_reduction.rs index 450cee4007c..40be71a0e5d 100644 --- a/src/tools/clippy/clippy_lints/src/eta_reduction.rs +++ b/src/tools/clippy/clippy_lints/src/eta_reduction.rs @@ -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(), - } - }, - } -} diff --git a/src/tools/clippy/clippy_lints/src/incompatible_msrv.rs b/src/tools/clippy/clippy_lints/src/incompatible_msrv.rs new file mode 100644 index 00000000000..f2f0e7d4266 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/incompatible_msrv.rs @@ -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); + } + }, + _ => {}, + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/iter_over_hash_type.rs b/src/tools/clippy/clippy_lints/src/iter_over_hash_type.rs index 8110c1970d9..6c6eff9ba48 100644 --- a/src/tools/clippy/clippy_lints/src/iter_over_hash_type.rs +++ b/src/tools/clippy/clippy_lints/src/iter_over_hash_type.rs @@ -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`)" diff --git a/src/tools/clippy/clippy_lints/src/lib.rs b/src/tools/clippy/clippy_lints/src/lib.rs index f6608b22953..14bd82f9c97 100644 --- a/src/tools/clippy/clippy_lints/src/lib.rs +++ b/src/tools/clippy/clippy_lints/src/lib.rs @@ -31,6 +31,7 @@ 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; @@ -158,6 +159,7 @@ 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; @@ -330,6 +332,7 @@ 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; @@ -526,6 +529,7 @@ 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, @@ -580,6 +584,7 @@ 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: _, @@ -877,7 +882,12 @@ 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()); @@ -973,7 +983,12 @@ 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)); @@ -1099,6 +1114,8 @@ 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` } diff --git a/src/tools/clippy/clippy_lints/src/loops/mod.rs b/src/tools/clippy/clippy_lints/src/loops/mod.rs index 3c9bde86bb6..b5e39b33c6a 100644 --- a/src/tools/clippy/clippy_lints/src/loops/mod.rs +++ b/src/tools/clippy/clippy_lints/src/loops/mod.rs @@ -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" diff --git a/src/tools/clippy/clippy_lints/src/loops/never_loop.rs b/src/tools/clippy/clippy_lints/src/loops/never_loop.rs index 62bc663191f..245a903f998 100644 --- a/src/tools/clippy/clippy_lints/src/loops/never_loop.rs +++ b/src/tools/clippy/clippy_lints/src/loops/never_loop.rs @@ -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, diff --git a/src/tools/clippy/clippy_lints/src/manual_retain.rs b/src/tools/clippy/clippy_lints/src/manual_retain.rs index 1fe247dacb9..6f15fca089e 100644 --- a/src/tools/clippy/clippy_lints/src/manual_retain.rs +++ b/src/tools/clippy/clippy_lints/src/manual_retain.rs @@ -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) @@ -147,43 +207,25 @@ 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}| {})", + { + if let hir::PatKind::Ref(pat, _) = filter_params.pat.kind { + 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, "..") - )), - _ => None, - }, - _ => None, + ), + ); } - { - 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, - ); + // Be conservative now. Do nothing for the `Binding` case. + // TODO: Ideally, we can rewrite the lambda by stripping one level of reference } } @@ -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, + ); +} diff --git a/src/tools/clippy/clippy_lints/src/methods/manual_c_str_literals.rs b/src/tools/clippy/clippy_lints/src/methods/manual_c_str_literals.rs new file mode 100644 index 00000000000..cb9fb373c10 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/methods/manual_c_str_literals.rs @@ -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 +} diff --git a/src/tools/clippy/clippy_lints/src/methods/map_unwrap_or.rs b/src/tools/clippy/clippy_lints/src/methods/map_unwrap_or.rs index 52ea584a2c8..3226fa9cd3f 100644 --- a/src/tools/clippy/clippy_lints/src/methods/map_unwrap_or.rs +++ b/src/tools/clippy/clippy_lints/src/methods/map_unwrap_or.rs @@ -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); diff --git a/src/tools/clippy/clippy_lints/src/methods/mod.rs b/src/tools/clippy/clippy_lints/src/methods/mod.rs index 03bcf108914..e8a7a321bf4 100644 --- a/src/tools/clippy/clippy_lints/src/methods/mod.rs +++ b/src/tools/clippy/clippy_lints/src/methods/mod.rs @@ -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) { diff --git a/src/tools/clippy/clippy_lints/src/methods/unnecessary_fold.rs b/src/tools/clippy/clippy_lints/src/methods/unnecessary_fold.rs index f3577ef6082..2046692bbd0 100644 --- a/src/tools/clippy/clippy_lints/src/methods/unnecessary_fold.rs +++ b/src/tools/clippy/clippy_lints/src/methods/unnecessary_fold.rs @@ -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, diff --git a/src/tools/clippy/clippy_lints/src/methods/unnecessary_result_map_or_else.rs b/src/tools/clippy/clippy_lints/src/methods/unnecessary_result_map_or_else.rs new file mode 100644 index 00000000000..7b0cf48ac43 --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/methods/unnecessary_result_map_or_else.rs @@ -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); + } + }, + _ => {}, + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/no_effect.rs b/src/tools/clippy/clippy_lints/src/no_effect.rs index 0d234f7f9b5..580160efeb7 100644 --- a/src/tools/clippy/clippy_lints/src/no_effect.rs +++ b/src/tools/clippy/clippy_lints/src/no_effect.rs @@ -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, diff --git a/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs b/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs index d621051ef16..ae14016f482 100644 --- a/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs +++ b/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs @@ -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, } } diff --git a/src/tools/clippy/clippy_lints/src/operators/mod.rs b/src/tools/clippy/clippy_lints/src/operators/mod.rs index 4c09c4eea58..e002429e3a4 100644 --- a/src/tools/clippy/clippy_lints/src/operators/mod.rs +++ b/src/tools/clippy/clippy_lints/src/operators/mod.rs @@ -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); diff --git a/src/tools/clippy/clippy_lints/src/operators/modulo_arithmetic.rs b/src/tools/clippy/clippy_lints/src/operators/modulo_arithmetic.rs index cb3916484c1..40d4a842bef 100644 --- a/src/tools/clippy/clippy_lints/src/operators/modulo_arithmetic.rs +++ b/src/tools/clippy/clippy_lints/src/operators/modulo_arithmetic.rs @@ -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, diff --git a/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs b/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs index 334e6770ae4..915da18aafe 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_closure_call.rs @@ -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, diff --git a/src/tools/clippy/clippy_lints/src/redundant_locals.rs b/src/tools/clippy/clippy_lints/src/redundant_locals.rs index 2c511ee0bc0..700a5dd4a85 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_locals.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_locals.rs @@ -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; diff --git a/src/tools/clippy/clippy_lints/src/redundant_type_annotations.rs b/src/tools/clippy/clippy_lints/src/redundant_type_annotations.rs index 07fcb69afbc..c8352c05265 100644 --- a/src/tools/clippy/clippy_lints/src/redundant_type_annotations.rs +++ b/src/tools/clippy/clippy_lints/src/redundant_type_annotations.rs @@ -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"); + } + }, } }, _ => (), diff --git a/src/tools/clippy/clippy_lints/src/repeat_vec_with_capacity.rs b/src/tools/clippy/clippy_lints/src/repeat_vec_with_capacity.rs index 5a4933a3fce..fcb79f6d694 100644 --- a/src/tools/clippy/clippy_lints/src/repeat_vec_with_capacity.rs +++ b/src/tools/clippy/clippy_lints/src/repeat_vec_with_capacity.rs @@ -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" diff --git a/src/tools/clippy/clippy_lints/src/returns.rs b/src/tools/clippy/clippy_lints/src/returns.rs index e0175046587..2af466d3f51 100644 --- a/src/tools/clippy/clippy_lints/src/returns.rs +++ b/src/tools/clippy/clippy_lints/src/returns.rs @@ -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 diff --git a/src/tools/clippy/clippy_lints/src/to_string_trait_impl.rs b/src/tools/clippy/clippy_lints/src/to_string_trait_impl.rs new file mode 100644 index 00000000000..e1cea99085f --- /dev/null +++ b/src/tools/clippy/clippy_lints/src/to_string_trait_impl.rs @@ -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", + ); + } + } +} diff --git a/src/tools/clippy/clippy_lints/src/unconditional_recursion.rs b/src/tools/clippy/clippy_lints/src/unconditional_recursion.rs index 209035804e4..224ec475c51 100644 --- a/src/tools/clippy/clippy_lints/src/unconditional_recursion.rs +++ b/src/tools/clippy/clippy_lints/src/unconditional_recursion.rs @@ -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 { diff --git a/src/tools/clippy/clippy_lints/src/unused_io_amount.rs b/src/tools/clippy/clippy_lints/src/unused_io_amount.rs index adc66e15ff5..6b3ea7700b7 100644 --- a/src/tools/clippy/clippy_lints/src/unused_io_amount.rs +++ b/src/tools/clippy/clippy_lints/src/unused_io_amount.rs @@ -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 - } - }) - .collect(); - if !found_arms.is_empty() { - emit_lint(cx, expr.span, op, found_arms.as_slice()); + // 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]); + } + 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!( diff --git a/src/tools/clippy/clippy_lints/src/utils/author.rs b/src/tools/clippy/clippy_lints/src/utils/author.rs index 288df0fd663..29c67341a46 100644 --- a/src/tools/clippy/clippy_lints/src/utils/author.rs +++ b/src/tools/clippy/clippy_lints/src/utils/author.rs @@ -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 { diff --git a/src/tools/clippy/clippy_lints/src/wildcard_imports.rs b/src/tools/clippy/clippy_lints/src/wildcard_imports.rs index b82bd1d7e7c..5410e8ac117 100644 --- a/src/tools/clippy/clippy_lints/src/wildcard_imports.rs +++ b/src/tools/clippy/clippy_lints/src/wildcard_imports.rs @@ -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())) +} diff --git a/src/tools/clippy/clippy_utils/Cargo.toml b/src/tools/clippy/clippy_utils/Cargo.toml index b8869eedf52..c7454fa3328 100644 --- a/src/tools/clippy/clippy_utils/Cargo.toml +++ b/src/tools/clippy/clippy_utils/Cargo.toml @@ -1,6 +1,6 @@ [package] name = "clippy_utils" -version = "0.1.77" +version = "0.1.78" edition = "2021" publish = false diff --git a/src/tools/clippy/clippy_utils/src/lib.rs b/src/tools/clippy/clippy_utils/src/lib.rs index d2bc49d1e29..6a33e11be46 100644 --- a/src/tools/clippy/clippy_utils/src/lib.rs +++ b/src/tools/clippy/clippy_utils/src/lib.rs @@ -1,5 +1,6 @@ #![feature(array_chunks)] #![feature(box_patterns)] +#![feature(control_flow_enum)] #![feature(if_let_guard)] #![feature(let_chains)] #![feature(lint_reasons)] @@ -81,6 +82,7 @@ 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; @@ -90,6 +92,7 @@ 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}; @@ -108,8 +111,8 @@ 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; @@ -120,10 +123,7 @@ 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; @@ -1359,46 +1359,12 @@ 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(_) => (), @@ -2596,26 +2562,30 @@ 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. +/// +/// 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`, block expressions to find where the value -/// produced by the expression is consumed. +/// 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; @@ -2625,18 +2595,19 @@ 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 } @@ -2680,6 +2651,8 @@ 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. @@ -2756,144 +2729,104 @@ 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, - }), - - Node::ExprField(field) if field.span.ctxt() == ctxt => Some(ExprUseCtxt { - node: ExprUseNode::Field(field), - adjustments, - is_ty_unified, - moved_before_use, - }), + }) => ExprUseNode::Return(owner_id), - Node::Expr(parent) if parent.span.ctxt() == ctxt => match parent.kind { - ExprKind::Ret(_) => Some(ExprUseCtxt { - node: 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) { - 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, - name.args, - args.iter().position(|arg| arg.hir_id == child_id).map_or(0, |i| i + 1), - ), - 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, + 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()), }), - 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::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, }, - ExprKind::Block(..) => { - moved_before_use = true; - None - }, - _ => None, + 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, }, - _ => None, + _ => ExprUseNode::Other, + }; + ExprUseCtxt { + node, + adjustments, + is_ty_unified, + moved_before_use, } }) } @@ -3270,3 +3203,131 @@ 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("::") + } +} diff --git a/src/tools/clippy/clippy_utils/src/ty.rs b/src/tools/clippy/clippy_utils/src/ty.rs index 11bb16ff6c5..6762c883005 100644 --- a/src/tools/clippy/clippy_utils/src/ty.rs +++ b/src/tools/clippy/clippy_utils/src/ty.rs @@ -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 { diff --git a/src/tools/clippy/declare_clippy_lint/Cargo.toml b/src/tools/clippy/declare_clippy_lint/Cargo.toml index 5aaafb41721..0f90cef5cdd 100644 --- a/src/tools/clippy/declare_clippy_lint/Cargo.toml +++ b/src/tools/clippy/declare_clippy_lint/Cargo.toml @@ -1,6 +1,6 @@ [package] name = "declare_clippy_lint" -version = "0.1.77" +version = "0.1.78" edition = "2021" publish = false diff --git a/src/tools/clippy/rust-toolchain b/src/tools/clippy/rust-toolchain index d2d56e59ee3..fcf5c456270 100644 --- a/src/tools/clippy/rust-toolchain +++ b/src/tools/clippy/rust-toolchain @@ -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"] diff --git a/src/tools/clippy/src/driver.rs b/src/tools/clippy/src/driver.rs index 1b159f5937a..bdf1cf0a224 100644 --- a/src/tools/clippy/src/driver.rs +++ b/src/tools/clippy/src/driver.rs @@ -24,9 +24,11 @@ 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; @@ -190,12 +192,31 @@ 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]); } }; diff --git a/src/tools/clippy/tests/ui-cargo/lint_groups_priority/fail/Cargo.stderr b/src/tools/clippy/tests/ui-cargo/lint_groups_priority/fail/Cargo.stderr new file mode 100644 index 00000000000..103e60d8484 --- /dev/null +++ b/src/tools/clippy/tests/ui-cargo/lint_groups_priority/fail/Cargo.stderr @@ -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 diff --git a/src/tools/clippy/tests/ui-cargo/lint_groups_priority/fail/Cargo.toml b/src/tools/clippy/tests/ui-cargo/lint_groups_priority/fail/Cargo.toml new file mode 100644 index 00000000000..4ce41f78171 --- /dev/null +++ b/src/tools/clippy/tests/ui-cargo/lint_groups_priority/fail/Cargo.toml @@ -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 } diff --git a/src/tools/clippy/tests/ui-cargo/lint_groups_priority/fail/src/lib.rs b/src/tools/clippy/tests/ui-cargo/lint_groups_priority/fail/src/lib.rs new file mode 100644 index 00000000000..8b137891791 --- /dev/null +++ b/src/tools/clippy/tests/ui-cargo/lint_groups_priority/fail/src/lib.rs @@ -0,0 +1 @@ + diff --git a/src/tools/clippy/tests/ui-cargo/lint_groups_priority/pass/Cargo.toml b/src/tools/clippy/tests/ui-cargo/lint_groups_priority/pass/Cargo.toml new file mode 100644 index 00000000000..e9fcf803d93 --- /dev/null +++ b/src/tools/clippy/tests/ui-cargo/lint_groups_priority/pass/Cargo.toml @@ -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 } diff --git a/src/tools/clippy/tests/ui-cargo/lint_groups_priority/pass/src/lib.rs b/src/tools/clippy/tests/ui-cargo/lint_groups_priority/pass/src/lib.rs new file mode 100644 index 00000000000..8b137891791 --- /dev/null +++ b/src/tools/clippy/tests/ui-cargo/lint_groups_priority/pass/src/lib.rs @@ -0,0 +1 @@ + diff --git a/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.fixed b/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.fixed index 6c58e07d846..497f783087a 100644 --- a/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.fixed +++ b/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.fixed @@ -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}; diff --git a/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.rs b/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.rs index e1dc3f4389c..6e7874108a3 100644 --- a/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.rs +++ b/src/tools/clippy/tests/ui-toml/min_rust_version/min_rust_version.rs @@ -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}; diff --git a/src/tools/clippy/tests/ui-toml/modulo_arithmetic/clippy.toml b/src/tools/clippy/tests/ui-toml/modulo_arithmetic/clippy.toml new file mode 100644 index 00000000000..de80f4ae598 --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/modulo_arithmetic/clippy.toml @@ -0,0 +1 @@ +allow-comparison-to-zero = false diff --git a/src/tools/clippy/tests/ui-toml/modulo_arithmetic/modulo_arithmetic.rs b/src/tools/clippy/tests/ui-toml/modulo_arithmetic/modulo_arithmetic.rs new file mode 100644 index 00000000000..27d27564baf --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/modulo_arithmetic/modulo_arithmetic.rs @@ -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; +} diff --git a/src/tools/clippy/tests/ui-toml/modulo_arithmetic/modulo_arithmetic.stderr b/src/tools/clippy/tests/ui-toml/modulo_arithmetic/modulo_arithmetic.stderr new file mode 100644 index 00000000000..da644b05a11 --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/modulo_arithmetic/modulo_arithmetic.stderr @@ -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 + diff --git a/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr b/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr index fc683e514ba..f097d2503e1 100644 --- a/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr +++ b/src/tools/clippy/tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr @@ -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 diff --git a/src/tools/clippy/tests/ui-toml/wildcard_imports/clippy.toml b/src/tools/clippy/tests/ui-toml/wildcard_imports/clippy.toml index 875aaeef6c9..68815c1756a 100644 --- a/src/tools/clippy/tests/ui-toml/wildcard_imports/clippy.toml +++ b/src/tools/clippy/tests/ui-toml/wildcard_imports/clippy.toml @@ -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"] diff --git a/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.fixed b/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.fixed index 1752f48856c..af72d6be0e0 100644 --- a/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.fixed +++ b/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.fixed @@ -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(); } diff --git a/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.rs b/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.rs index 331c2c59c22..91009dd8835 100644 --- a/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.rs +++ b/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.rs @@ -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(); } diff --git a/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.stderr b/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.stderr index f11fda6a0c6..a733d786d0e 100644 --- a/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.stderr +++ b/src/tools/clippy/tests/ui-toml/wildcard_imports/wildcard_imports.stderr @@ -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 diff --git a/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/clippy.toml b/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/clippy.toml new file mode 100644 index 00000000000..6b7882e64a8 --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/clippy.toml @@ -0,0 +1 @@ +allowed-wildcard-imports = ["utils"] diff --git a/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.fixed b/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.fixed new file mode 100644 index 00000000000..d539525c45e --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.fixed @@ -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(); +} diff --git a/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.rs b/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.rs new file mode 100644 index 00000000000..9169d16a08b --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.rs @@ -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(); +} diff --git a/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.stderr b/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.stderr new file mode 100644 index 00000000000..12c2f9cbada --- /dev/null +++ b/src/tools/clippy/tests/ui-toml/wildcard_imports_whitelist/wildcard_imports.stderr @@ -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 + diff --git a/src/tools/clippy/tests/ui/borrow_as_ptr.fixed b/src/tools/clippy/tests/ui/borrow_as_ptr.fixed index 6c0de96d65e..289a5ef38b8 100644 --- a/src/tools/clippy/tests/ui/borrow_as_ptr.fixed +++ b/src/tools/clippy/tests/ui/borrow_as_ptr.fixed @@ -5,6 +5,7 @@ fn a() -> i32 { 0 } +#[clippy::msrv = "1.75"] fn main() { let val = 1; let _p = std::ptr::addr_of!(val); diff --git a/src/tools/clippy/tests/ui/borrow_as_ptr.rs b/src/tools/clippy/tests/ui/borrow_as_ptr.rs index c37c5357c82..b5328cb22dc 100644 --- a/src/tools/clippy/tests/ui/borrow_as_ptr.rs +++ b/src/tools/clippy/tests/ui/borrow_as_ptr.rs @@ -5,6 +5,7 @@ fn a() -> i32 { 0 } +#[clippy::msrv = "1.75"] fn main() { let val = 1; let _p = &val as *const i32; diff --git a/src/tools/clippy/tests/ui/borrow_as_ptr.stderr b/src/tools/clippy/tests/ui/borrow_as_ptr.stderr index 43a7a6bf5b5..b9861805905 100644 --- a/src/tools/clippy/tests/ui/borrow_as_ptr.stderr +++ b/src/tools/clippy/tests/ui/borrow_as_ptr.stderr @@ -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)` diff --git a/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.fixed b/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.fixed index a361a36474d..f66554de300 100644 --- a/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.fixed +++ b/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.fixed @@ -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; diff --git a/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.rs b/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.rs index b3fe01442b7..1fc254aafa7 100644 --- a/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.rs +++ b/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.rs @@ -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; diff --git a/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.stderr b/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.stderr index 2f258bcf966..1ef0a948a32 100644 --- a/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.stderr +++ b/src/tools/clippy/tests/ui/borrow_as_ptr_no_std.stderr @@ -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)` diff --git a/src/tools/clippy/tests/ui/eta.fixed b/src/tools/clippy/tests/ui/eta.fixed index 32c7499bf73..da28ec2e653 100644 --- a/src/tools/clippy/tests/ui/eta.fixed +++ b/src/tools/clippy/tests/ui/eta.fixed @@ -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 + } + } + } +} diff --git a/src/tools/clippy/tests/ui/eta.rs b/src/tools/clippy/tests/ui/eta.rs index 25b7431ba8c..f924100f8f4 100644 --- a/src/tools/clippy/tests/ui/eta.rs +++ b/src/tools/clippy/tests/ui/eta.rs @@ -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 + } + } + } +} diff --git a/src/tools/clippy/tests/ui/eta.stderr b/src/tools/clippy/tests/ui/eta.stderr index 951e4ac749c..945de466d83 100644 --- a/src/tools/clippy/tests/ui/eta.stderr +++ b/src/tools/clippy/tests/ui/eta.stderr @@ -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 diff --git a/src/tools/clippy/tests/ui/format_args.fixed b/src/tools/clippy/tests/ui/format_args.fixed index ddd5976c408..cab20b11e07 100644 --- a/src/tools/clippy/tests/ui/format_args.fixed +++ b/src/tools/clippy/tests/ui/format_args.fixed @@ -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") diff --git a/src/tools/clippy/tests/ui/format_args.rs b/src/tools/clippy/tests/ui/format_args.rs index 18e1bc1af67..bc3645cb2c2 100644 --- a/src/tools/clippy/tests/ui/format_args.rs +++ b/src/tools/clippy/tests/ui/format_args.rs @@ -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") diff --git a/src/tools/clippy/tests/ui/format_args.stderr b/src/tools/clippy/tests/ui/format_args.stderr index dcdfa668aff..2f1714296d6 100644 --- a/src/tools/clippy/tests/ui/format_args.stderr +++ b/src/tools/clippy/tests/ui/format_args.stderr @@ -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]` diff --git a/src/tools/clippy/tests/ui/ignored_unit_patterns.fixed b/src/tools/clippy/tests/ui/ignored_unit_patterns.fixed index 707a0e76e4e..118f0b48895 100644 --- a/src/tools/clippy/tests/ui/ignored_unit_patterns.fixed +++ b/src/tools/clippy/tests/ui/ignored_unit_patterns.fixed @@ -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!() diff --git a/src/tools/clippy/tests/ui/ignored_unit_patterns.rs b/src/tools/clippy/tests/ui/ignored_unit_patterns.rs index 544f2b8f692..92feb9e6c28 100644 --- a/src/tools/clippy/tests/ui/ignored_unit_patterns.rs +++ b/src/tools/clippy/tests/ui/ignored_unit_patterns.rs @@ -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!() diff --git a/src/tools/clippy/tests/ui/ignored_unit_patterns.stderr b/src/tools/clippy/tests/ui/ignored_unit_patterns.stderr index 05c8f281e55..18ca7ebbcf2 100644 --- a/src/tools/clippy/tests/ui/ignored_unit_patterns.stderr +++ b/src/tools/clippy/tests/ui/ignored_unit_patterns.stderr @@ -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 `_`: `()` diff --git a/src/tools/clippy/tests/ui/incompatible_msrv.rs b/src/tools/clippy/tests/ui/incompatible_msrv.rs new file mode 100644 index 00000000000..a92017fb0f6 --- /dev/null +++ b/src/tools/clippy/tests/ui/incompatible_msrv.rs @@ -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() {} diff --git a/src/tools/clippy/tests/ui/incompatible_msrv.stderr b/src/tools/clippy/tests/ui/incompatible_msrv.stderr new file mode 100644 index 00000000000..bd5ecd6ed2f --- /dev/null +++ b/src/tools/clippy/tests/ui/incompatible_msrv.stderr @@ -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` + --> $DIR/incompatible_msrv.rs:19:5 + | +LL | sleep(Duration::new(1, 0)); + | ^^^^^ + +error: aborting due to 3 previous errors + diff --git a/src/tools/clippy/tests/ui/manual_c_str_literals.fixed b/src/tools/clippy/tests/ui/manual_c_str_literals.fixed new file mode 100644 index 00000000000..a24d7088c88 --- /dev/null +++ b/src/tools/clippy/tests/ui/manual_c_str_literals.fixed @@ -0,0 +1,60 @@ +#![warn(clippy::manual_c_str_literals)] +#![allow(clippy::no_effect)] + +use std::ffi::CStr; + +macro_rules! cstr { + ($s:literal) => { + CStr::from_bytes_with_nul(concat!($s, "\0").as_bytes()).unwrap() + }; +} + +macro_rules! macro_returns_c_str { + () => { + CStr::from_bytes_with_nul(b"foo\0").unwrap(); + }; +} + +macro_rules! macro_returns_byte_string { + () => { + b"foo\0" + }; +} + +#[clippy::msrv = "1.76.0"] +fn pre_stabilization() { + CStr::from_bytes_with_nul(b"foo\0"); +} + +#[clippy::msrv = "1.77.0"] +fn post_stabilization() { + c"foo"; +} + +fn main() { + c"foo"; + c"foo"; + c"foo"; + c"foo\\0sdsd"; + CStr::from_bytes_with_nul(br"foo\\0sdsd\0").unwrap(); + CStr::from_bytes_with_nul(br"foo\x00").unwrap(); + CStr::from_bytes_with_nul(br##"foo#a\0"##).unwrap(); + + unsafe { c"foo" }; + unsafe { c"foo" }; + let _: *const _ = c"foo".as_ptr(); + let _: *const _ = c"foo".as_ptr(); + let _: *const _ = "foo".as_ptr(); // not a C-string + let _: *const _ = "".as_ptr(); + let _: *const _ = c"foo".as_ptr().cast::<i8>(); + let _ = "电脑".as_ptr(); + let _ = "电脑\\".as_ptr(); + let _ = c"电脑\\".as_ptr(); + let _ = c"电脑".as_ptr(); + let _ = c"电脑".as_ptr(); + + // Macro cases, don't lint: + cstr!("foo"); + macro_returns_c_str!(); + CStr::from_bytes_with_nul(macro_returns_byte_string!()).unwrap(); +} diff --git a/src/tools/clippy/tests/ui/manual_c_str_literals.rs b/src/tools/clippy/tests/ui/manual_c_str_literals.rs new file mode 100644 index 00000000000..0a007786720 --- /dev/null +++ b/src/tools/clippy/tests/ui/manual_c_str_literals.rs @@ -0,0 +1,60 @@ +#![warn(clippy::manual_c_str_literals)] +#![allow(clippy::no_effect)] + +use std::ffi::CStr; + +macro_rules! cstr { + ($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(); +} diff --git a/src/tools/clippy/tests/ui/manual_c_str_literals.stderr b/src/tools/clippy/tests/ui/manual_c_str_literals.stderr new file mode 100644 index 00000000000..8de4e16f010 --- /dev/null +++ b/src/tools/clippy/tests/ui/manual_c_str_literals.stderr @@ -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 + diff --git a/src/tools/clippy/tests/ui/manual_retain.fixed b/src/tools/clippy/tests/ui/manual_retain.fixed index 4dea3e8bfe6..5540029bf6b 100644 --- a/src/tools/clippy/tests/ui/manual_retain.fixed +++ b/src/tools/clippy/tests/ui/manual_retain.fixed @@ -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); +} diff --git a/src/tools/clippy/tests/ui/manual_retain.rs b/src/tools/clippy/tests/ui/manual_retain.rs index d839550f33a..cee641d9d65 100644 --- a/src/tools/clippy/tests/ui/manual_retain.rs +++ b/src/tools/clippy/tests/ui/manual_retain.rs @@ -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(); +} diff --git a/src/tools/clippy/tests/ui/manual_retain.stderr b/src/tools/clippy/tests/ui/manual_retain.stderr index 0c5b1383b6a..2c872f3b430 100644 --- a/src/tools/clippy/tests/ui/manual_retain.stderr +++ b/src/tools/clippy/tests/ui/manual_retain.stderr @@ -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 diff --git a/src/tools/clippy/tests/ui/modulo_arithmetic_integral.rs b/src/tools/clippy/tests/ui/modulo_arithmetic_integral.rs index 4dbed24026c..c427b8580e1 100644 --- a/src/tools/clippy/tests/ui/modulo_arithmetic_integral.rs +++ b/src/tools/clippy/tests/ui/modulo_arithmetic_integral.rs @@ -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; } diff --git a/src/tools/clippy/tests/ui/needless_borrow.fixed b/src/tools/clippy/tests/ui/needless_borrow.fixed index ff1e2dc8875..23e8bf8a468 100644 --- a/src/tools/clippy/tests/ui/needless_borrow.fixed +++ b/src/tools/clippy/tests/ui/needless_borrow.fixed @@ -131,6 +131,9 @@ fn main() { 0 } } + + // issue #11786 + let x: (&str,) = ("",); } #[allow(clippy::needless_borrowed_reference)] diff --git a/src/tools/clippy/tests/ui/needless_borrow.rs b/src/tools/clippy/tests/ui/needless_borrow.rs index 597021539ac..27771a8f15b 100644 --- a/src/tools/clippy/tests/ui/needless_borrow.rs +++ b/src/tools/clippy/tests/ui/needless_borrow.rs @@ -131,6 +131,9 @@ fn main() { 0 } } + + // issue #11786 + let x: (&str,) = (&"",); } #[allow(clippy::needless_borrowed_reference)] diff --git a/src/tools/clippy/tests/ui/needless_borrow.stderr b/src/tools/clippy/tests/ui/needless_borrow.stderr index 44552ee6abe..a21ed8382c1 100644 --- a/src/tools/clippy/tests/ui/needless_borrow.stderr +++ b/src/tools/clippy/tests/ui/needless_borrow.stderr @@ -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 diff --git a/src/tools/clippy/tests/ui/needless_return_with_question_mark.fixed b/src/tools/clippy/tests/ui/needless_return_with_question_mark.fixed index 0147c73a94b..9b7da852663 100644 --- a/src/tools/clippy/tests/ui/needless_return_with_question_mark.fixed +++ b/src/tools/clippy/tests/ui/needless_return_with_question_mark.fixed @@ -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(()) + } +} diff --git a/src/tools/clippy/tests/ui/needless_return_with_question_mark.rs b/src/tools/clippy/tests/ui/needless_return_with_question_mark.rs index 66e1f438f8c..68e76d2b640 100644 --- a/src/tools/clippy/tests/ui/needless_return_with_question_mark.rs +++ b/src/tools/clippy/tests/ui/needless_return_with_question_mark.rs @@ -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(()) + } +} diff --git a/src/tools/clippy/tests/ui/never_loop.rs b/src/tools/clippy/tests/ui/never_loop.rs index c67a6d4494e..92f173d9db4 100644 --- a/src/tools/clippy/tests/ui/never_loop.rs +++ b/src/tools/clippy/tests/ui/never_loop.rs @@ -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(); diff --git a/src/tools/clippy/tests/ui/nonminimal_bool.rs b/src/tools/clippy/tests/ui/nonminimal_bool.rs index 4d48ef14d31..f7c3df7066f 100644 --- a/src/tools/clippy/tests/ui/nonminimal_bool.rs +++ b/src/tools/clippy/tests/ui/nonminimal_bool.rs @@ -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 + }; +} diff --git a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed index f272d8359a3..ce5c7f2600b 100644 --- a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed +++ b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.fixed @@ -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) => { + $closure(1) + }; + } + m!(|x| println!("{x}")); +} diff --git a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs index f45db8c9cff..ac09390e6ea 100644 --- a/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs +++ b/src/tools/clippy/tests/ui/redundant_closure_call_fixable.rs @@ -102,3 +102,12 @@ mod issue11707 { fn avoid_double_parens() { std::convert::identity((|| 13_i32 + 36_i32)()).leading_zeros(); } + +fn fp_11274() { + macro_rules! m { + ($closure:expr) => { + $closure(1) + }; + } + m!(|x| println!("{x}")); +} diff --git a/src/tools/clippy/tests/ui/redundant_locals.rs b/src/tools/clippy/tests/ui/redundant_locals.rs index 182d067a5e9..f6909828aa9 100644 --- a/src/tools/clippy/tests/ui/redundant_locals.rs +++ b/src/tools/clippy/tests/ui/redundant_locals.rs @@ -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) + }); +} diff --git a/src/tools/clippy/tests/ui/redundant_locals.stderr b/src/tools/clippy/tests/ui/redundant_locals.stderr index 30ab4aa2ea9..610d587ddad 100644 --- a/src/tools/clippy/tests/ui/redundant_locals.stderr +++ b/src/tools/clippy/tests/ui/redundant_locals.stderr @@ -1,11 +1,11 @@ error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:12:5 + --> $DIR/redundant_locals.rs:13:5 | LL | let x = x; | ^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:11:9 + --> $DIR/redundant_locals.rs:12:9 | LL | let x = 1; | ^ @@ -13,157 +13,157 @@ LL | let x = 1; = help: to override `-D warnings` add `#[allow(clippy::redundant_locals)]` error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:17:5 + --> $DIR/redundant_locals.rs:18:5 | LL | let mut x = x; | ^^^^^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:16:9 + --> $DIR/redundant_locals.rs:17:9 | LL | let mut x = 1; | ^^^^^ error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:47:5 + --> $DIR/redundant_locals.rs:48:5 | LL | let x = x; | ^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:46:14 + --> $DIR/redundant_locals.rs:47:14 | LL | fn parameter(x: i32) { | ^ error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:52:5 + --> $DIR/redundant_locals.rs:53:5 | LL | let x = x; | ^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:51:9 + --> $DIR/redundant_locals.rs:52:9 | LL | let x = 1; | ^ error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:53:5 + --> $DIR/redundant_locals.rs:54:5 | LL | let x = x; | ^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:52:9 + --> $DIR/redundant_locals.rs:53:9 | LL | let x = x; | ^ error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:54:5 + --> $DIR/redundant_locals.rs:55:5 | LL | let x = x; | ^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:53:9 + --> $DIR/redundant_locals.rs:54:9 | LL | let x = x; | ^ error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:55:5 + --> $DIR/redundant_locals.rs:56:5 | LL | let x = x; | ^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:54:9 + --> $DIR/redundant_locals.rs:55:9 | LL | let x = x; | ^ error: redundant redefinition of a binding `a` - --> $DIR/redundant_locals.rs:61:5 + --> $DIR/redundant_locals.rs:62:5 | LL | let a = a; | ^^^^^^^^^^ | help: `a` is initially defined here - --> $DIR/redundant_locals.rs:59:9 + --> $DIR/redundant_locals.rs:60:9 | LL | let a = 1; | ^ error: redundant redefinition of a binding `b` - --> $DIR/redundant_locals.rs:62:5 + --> $DIR/redundant_locals.rs:63:5 | LL | let b = b; | ^^^^^^^^^^ | help: `b` is initially defined here - --> $DIR/redundant_locals.rs:60:9 + --> $DIR/redundant_locals.rs:61:9 | LL | let b = 2; | ^ error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:68:9 + --> $DIR/redundant_locals.rs:69:9 | LL | let x = x; | ^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:67:13 + --> $DIR/redundant_locals.rs:68:13 | LL | let x = 1; | ^ error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:75:9 + --> $DIR/redundant_locals.rs:76:9 | LL | let x = x; | ^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:74:13 + --> $DIR/redundant_locals.rs:75:13 | LL | let x = 1; | ^ error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:78:9 + --> $DIR/redundant_locals.rs:79:9 | LL | let x = x; | ^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:77:6 + --> $DIR/redundant_locals.rs:78:6 | LL | |x: i32| { | ^ error: redundant redefinition of a binding `x` - --> $DIR/redundant_locals.rs:97:9 + --> $DIR/redundant_locals.rs:98:9 | LL | let x = x; | ^^^^^^^^^^ | help: `x` is initially defined here - --> $DIR/redundant_locals.rs:94:9 + --> $DIR/redundant_locals.rs:95:9 | LL | let x = 1; | ^ error: redundant redefinition of a binding `a` - --> $DIR/redundant_locals.rs:152:5 + --> $DIR/redundant_locals.rs:153:5 | LL | let a = a; | ^^^^^^^^^^ | help: `a` is initially defined here - --> $DIR/redundant_locals.rs:150:9 + --> $DIR/redundant_locals.rs:151:9 | LL | let a = WithoutDrop(1); | ^ diff --git a/src/tools/clippy/tests/ui/redundant_type_annotations.rs b/src/tools/clippy/tests/ui/redundant_type_annotations.rs index acf53fea2bb..dc9b073ffba 100644 --- a/src/tools/clippy/tests/ui/redundant_type_annotations.rs +++ b/src/tools/clippy/tests/ui/redundant_type_annotations.rs @@ -196,13 +196,18 @@ fn test_simple_types() { let _var: &str = "test"; //~^ ERROR: redundant type annotation - let _var: &[u8] = b"test"; + let _var: &[u8; 4] = b"test"; //~^ ERROR: redundant type annotation let _var: bool = false; //~^ ERROR: redundant type annotation } +fn issue12212() { + // This should not be linted + let _var: &[u8] = b"test"; +} + fn issue11190() {} fn main() {} diff --git a/src/tools/clippy/tests/ui/redundant_type_annotations.stderr b/src/tools/clippy/tests/ui/redundant_type_annotations.stderr index d1f26f1832e..48df465ad49 100644 --- a/src/tools/clippy/tests/ui/redundant_type_annotations.stderr +++ b/src/tools/clippy/tests/ui/redundant_type_annotations.stderr @@ -94,8 +94,8 @@ LL | let _var: &str = "test"; error: redundant type annotation --> $DIR/redundant_type_annotations.rs:199:5 | -LL | let _var: &[u8] = b"test"; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^ +LL | let _var: &[u8; 4] = b"test"; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: redundant type annotation --> $DIR/redundant_type_annotations.rs:202:5 diff --git a/src/tools/clippy/tests/ui/ref_as_ptr.fixed b/src/tools/clippy/tests/ui/ref_as_ptr.fixed new file mode 100644 index 00000000000..7a946393f25 --- /dev/null +++ b/src/tools/clippy/tests/ui/ref_as_ptr.fixed @@ -0,0 +1,110 @@ +#![warn(clippy::ref_as_ptr)] +#![allow(clippy::unnecessary_mut_passed)] + +fn main() { + let _ = std::ptr::from_ref(&1u8); + let _ = std::ptr::from_ref::<u32>(&2u32); + let _ = std::ptr::from_ref::<f64>(&3.0f64); + + let _ = std::ptr::from_ref(&4) as *const f32; + let _ = std::ptr::from_ref::<f32>(&5.0f32) as *const u32; + + let _ = std::ptr::from_ref(&mut 6u8); + let _ = std::ptr::from_ref::<u32>(&mut 7u32); + let _ = std::ptr::from_ref::<f64>(&mut 8.0f64); + + let _ = std::ptr::from_ref(&mut 9) as *const f32; + let _ = std::ptr::from_ref::<f32>(&mut 10.0f32) as *const u32; + + let _ = std::ptr::from_mut(&mut 11u8); + let _ = std::ptr::from_mut::<u32>(&mut 12u32); + let _ = std::ptr::from_mut::<f64>(&mut 13.0f64); + + let _ = std::ptr::from_mut(&mut 14) as *const f32; + let _ = std::ptr::from_mut::<f32>(&mut 15.0f32) as *const u32; + + let _ = std::ptr::from_ref(&1u8); + let _ = std::ptr::from_ref::<u32>(&2u32); + let _ = std::ptr::from_ref::<f64>(&3.0f64); + + let _ = std::ptr::from_ref(&4) as *const f32; + let _ = std::ptr::from_ref::<f32>(&5.0f32) as *const u32; + + let val = 1; + let _ = std::ptr::from_ref(&val); + let _ = std::ptr::from_ref::<i32>(&val); + + let _ = std::ptr::from_ref(&val) as *const f32; + let _ = std::ptr::from_ref::<i32>(&val) as *const f64; + + let mut val: u8 = 2; + let _ = std::ptr::from_mut::<u8>(&mut val); + let _ = std::ptr::from_mut(&mut val); + + let _ = std::ptr::from_ref::<u8>(&mut val); + let _ = std::ptr::from_ref(&mut val); + + let _ = std::ptr::from_ref::<u8>(&mut val) as *const f64; + let _: *const Option<u8> = std::ptr::from_ref(&mut val) as *const _; + + let _ = std::ptr::from_ref::<[usize; 7]>(&std::array::from_fn(|i| i * i)); + let _ = std::ptr::from_ref::<[usize; 8]>(&mut std::array::from_fn(|i| i * i)); + let _ = std::ptr::from_mut::<[usize; 9]>(&mut std::array::from_fn(|i| i * i)); +} + +#[clippy::msrv = "1.75"] +fn _msrv_1_75() { + let val = &42_i32; + let mut_val = &mut 42_i32; + + // `std::ptr::from_{ref, mut}` was stabilized in 1.76. Do not lint this + let _ = val as *const i32; + let _ = mut_val as *mut i32; +} + +#[clippy::msrv = "1.76"] +fn _msrv_1_76() { + let val = &42_i32; + let mut_val = &mut 42_i32; + + let _ = std::ptr::from_ref::<i32>(val); + let _ = std::ptr::from_mut::<i32>(mut_val); +} + +fn foo(val: &[u8]) { + let _ = std::ptr::from_ref(val); + let _ = std::ptr::from_ref::<[u8]>(val); +} + +fn bar(val: &mut str) { + let _ = std::ptr::from_mut(val); + let _ = std::ptr::from_mut::<str>(val); +} + +struct X<'a>(&'a i32); + +impl<'a> X<'a> { + fn foo(&self) -> *const i64 { + std::ptr::from_ref(self.0) as *const _ + } + + fn bar(&mut self) -> *const i64 { + std::ptr::from_ref(self.0) as *const _ + } +} + +struct Y<'a>(&'a mut i32); + +impl<'a> Y<'a> { + fn foo(&self) -> *const i64 { + std::ptr::from_ref(self.0) as *const _ + } + + fn bar(&mut self) -> *const i64 { + std::ptr::from_ref(self.0) as *const _ + } + + fn baz(&mut self) -> *const i64 { + std::ptr::from_mut(self.0) as *mut _ + } +} diff --git a/src/tools/clippy/tests/ui/ref_as_ptr.rs b/src/tools/clippy/tests/ui/ref_as_ptr.rs new file mode 100644 index 00000000000..6f745505b46 --- /dev/null +++ b/src/tools/clippy/tests/ui/ref_as_ptr.rs @@ -0,0 +1,110 @@ +#![warn(clippy::ref_as_ptr)] +#![allow(clippy::unnecessary_mut_passed)] + +fn main() { + let _ = &1u8 as *const _; + let _ = &2u32 as *const u32; + let _ = &3.0f64 as *const f64; + + let _ = &4 as *const _ as *const f32; + let _ = &5.0f32 as *const f32 as *const u32; + + let _ = &mut 6u8 as *const _; + let _ = &mut 7u32 as *const u32; + let _ = &mut 8.0f64 as *const f64; + + let _ = &mut 9 as *const _ as *const f32; + let _ = &mut 10.0f32 as *const f32 as *const u32; + + let _ = &mut 11u8 as *mut _; + let _ = &mut 12u32 as *mut u32; + let _ = &mut 13.0f64 as *mut f64; + + let _ = &mut 14 as *mut _ as *const f32; + let _ = &mut 15.0f32 as *mut f32 as *const u32; + + let _ = &1u8 as *const _; + let _ = &2u32 as *const u32; + let _ = &3.0f64 as *const f64; + + let _ = &4 as *const _ as *const f32; + let _ = &5.0f32 as *const f32 as *const u32; + + let val = 1; + let _ = &val as *const _; + let _ = &val as *const i32; + + let _ = &val as *const _ as *const f32; + let _ = &val as *const i32 as *const f64; + + let mut val: u8 = 2; + let _ = &mut val as *mut u8; + let _ = &mut val as *mut _; + + let _ = &mut val as *const u8; + let _ = &mut val as *const _; + + let _ = &mut val as *const u8 as *const f64; + let _: *const Option<u8> = &mut val as *const _ as *const _; + + let _ = &std::array::from_fn(|i| i * i) as *const [usize; 7]; + let _ = &mut std::array::from_fn(|i| i * i) as *const [usize; 8]; + let _ = &mut std::array::from_fn(|i| i * i) as *mut [usize; 9]; +} + +#[clippy::msrv = "1.75"] +fn _msrv_1_75() { + let val = &42_i32; + let mut_val = &mut 42_i32; + + // `std::ptr::from_{ref, mut}` was stabilized in 1.76. Do not lint this + let _ = val as *const i32; + let _ = mut_val as *mut i32; +} + +#[clippy::msrv = "1.76"] +fn _msrv_1_76() { + let val = &42_i32; + let mut_val = &mut 42_i32; + + let _ = val as *const i32; + let _ = mut_val as *mut i32; +} + +fn foo(val: &[u8]) { + let _ = val as *const _; + let _ = val as *const [u8]; +} + +fn bar(val: &mut str) { + let _ = val as *mut _; + let _ = val as *mut str; +} + +struct X<'a>(&'a i32); + +impl<'a> X<'a> { + fn foo(&self) -> *const i64 { + self.0 as *const _ as *const _ + } + + fn bar(&mut self) -> *const i64 { + self.0 as *const _ as *const _ + } +} + +struct Y<'a>(&'a mut i32); + +impl<'a> Y<'a> { + fn foo(&self) -> *const i64 { + self.0 as *const _ as *const _ + } + + fn bar(&mut self) -> *const i64 { + self.0 as *const _ as *const _ + } + + fn baz(&mut self) -> *const i64 { + self.0 as *mut _ as *mut _ + } +} diff --git a/src/tools/clippy/tests/ui/ref_as_ptr.stderr b/src/tools/clippy/tests/ui/ref_as_ptr.stderr new file mode 100644 index 00000000000..371d42df528 --- /dev/null +++ b/src/tools/clippy/tests/ui/ref_as_ptr.stderr @@ -0,0 +1,269 @@ +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:5:13 + | +LL | let _ = &1u8 as *const _; + | ^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(&1u8)` + | + = note: `-D clippy::ref-as-ptr` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::ref_as_ptr)]` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:6:13 + | +LL | let _ = &2u32 as *const u32; + | ^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<u32>(&2u32)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:7:13 + | +LL | let _ = &3.0f64 as *const f64; + | ^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<f64>(&3.0f64)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:9:13 + | +LL | let _ = &4 as *const _ as *const f32; + | ^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(&4)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:10:13 + | +LL | let _ = &5.0f32 as *const f32 as *const u32; + | ^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<f32>(&5.0f32)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:12:13 + | +LL | let _ = &mut 6u8 as *const _; + | ^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(&mut 6u8)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:13:13 + | +LL | let _ = &mut 7u32 as *const u32; + | ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<u32>(&mut 7u32)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:14:13 + | +LL | let _ = &mut 8.0f64 as *const f64; + | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<f64>(&mut 8.0f64)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:16:13 + | +LL | let _ = &mut 9 as *const _ as *const f32; + | ^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(&mut 9)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:17:13 + | +LL | let _ = &mut 10.0f32 as *const f32 as *const u32; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<f32>(&mut 10.0f32)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:19:13 + | +LL | let _ = &mut 11u8 as *mut _; + | ^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut(&mut 11u8)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:20:13 + | +LL | let _ = &mut 12u32 as *mut u32; + | ^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut::<u32>(&mut 12u32)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:21:13 + | +LL | let _ = &mut 13.0f64 as *mut f64; + | ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut::<f64>(&mut 13.0f64)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:23:13 + | +LL | let _ = &mut 14 as *mut _ as *const f32; + | ^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut(&mut 14)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:24:13 + | +LL | let _ = &mut 15.0f32 as *mut f32 as *const u32; + | ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut::<f32>(&mut 15.0f32)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:26:13 + | +LL | let _ = &1u8 as *const _; + | ^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(&1u8)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:27:13 + | +LL | let _ = &2u32 as *const u32; + | ^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<u32>(&2u32)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:28:13 + | +LL | let _ = &3.0f64 as *const f64; + | ^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<f64>(&3.0f64)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:30:13 + | +LL | let _ = &4 as *const _ as *const f32; + | ^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(&4)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:31:13 + | +LL | let _ = &5.0f32 as *const f32 as *const u32; + | ^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<f32>(&5.0f32)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:34:13 + | +LL | let _ = &val as *const _; + | ^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(&val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:35:13 + | +LL | let _ = &val as *const i32; + | ^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<i32>(&val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:37:13 + | +LL | let _ = &val as *const _ as *const f32; + | ^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(&val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:38:13 + | +LL | let _ = &val as *const i32 as *const f64; + | ^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<i32>(&val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:41:13 + | +LL | let _ = &mut val as *mut u8; + | ^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut::<u8>(&mut val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:42:13 + | +LL | let _ = &mut val as *mut _; + | ^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut(&mut val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:44:13 + | +LL | let _ = &mut val as *const u8; + | ^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<u8>(&mut val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:45:13 + | +LL | let _ = &mut val as *const _; + | ^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(&mut val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:47:13 + | +LL | let _ = &mut val as *const u8 as *const f64; + | ^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<u8>(&mut val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:48:32 + | +LL | let _: *const Option<u8> = &mut val as *const _ as *const _; + | ^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(&mut val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:50:13 + | +LL | let _ = &std::array::from_fn(|i| i * i) as *const [usize; 7]; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<[usize; 7]>(&std::array::from_fn(|i| i * i))` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:51:13 + | +LL | let _ = &mut std::array::from_fn(|i| i * i) as *const [usize; 8]; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<[usize; 8]>(&mut std::array::from_fn(|i| i * i))` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:52:13 + | +LL | let _ = &mut std::array::from_fn(|i| i * i) as *mut [usize; 9]; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut::<[usize; 9]>(&mut std::array::from_fn(|i| i * i))` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:70:13 + | +LL | let _ = val as *const i32; + | ^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<i32>(val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:71:13 + | +LL | let _ = mut_val as *mut i32; + | ^^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut::<i32>(mut_val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:75:13 + | +LL | let _ = val as *const _; + | ^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:76:13 + | +LL | let _ = val as *const [u8]; + | ^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref::<[u8]>(val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:80:13 + | +LL | let _ = val as *mut _; + | ^^^^^^^^^^^^^ help: try: `std::ptr::from_mut(val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:81:13 + | +LL | let _ = val as *mut str; + | ^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut::<str>(val)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:88:9 + | +LL | self.0 as *const _ as *const _ + | ^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(self.0)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:92:9 + | +LL | self.0 as *const _ as *const _ + | ^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(self.0)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:100:9 + | +LL | self.0 as *const _ as *const _ + | ^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(self.0)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:104:9 + | +LL | self.0 as *const _ as *const _ + | ^^^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_ref(self.0)` + +error: reference as raw pointer + --> $DIR/ref_as_ptr.rs:108:9 + | +LL | self.0 as *mut _ as *mut _ + | ^^^^^^^^^^^^^^^^ help: try: `std::ptr::from_mut(self.0)` + +error: aborting due to 44 previous errors + diff --git a/src/tools/clippy/tests/ui/strlen_on_c_strings.fixed b/src/tools/clippy/tests/ui/strlen_on_c_strings.fixed index 8304e2afd8b..1e7d04ffb9d 100644 --- a/src/tools/clippy/tests/ui/strlen_on_c_strings.fixed +++ b/src/tools/clippy/tests/ui/strlen_on_c_strings.fixed @@ -1,5 +1,5 @@ #![warn(clippy::strlen_on_c_strings)] -#![allow(dead_code)] +#![allow(dead_code, clippy::manual_c_str_literals)] #![feature(rustc_private)] extern crate libc; diff --git a/src/tools/clippy/tests/ui/strlen_on_c_strings.rs b/src/tools/clippy/tests/ui/strlen_on_c_strings.rs index deba40a9ea5..c3ad03591d4 100644 --- a/src/tools/clippy/tests/ui/strlen_on_c_strings.rs +++ b/src/tools/clippy/tests/ui/strlen_on_c_strings.rs @@ -1,5 +1,5 @@ #![warn(clippy::strlen_on_c_strings)] -#![allow(dead_code)] +#![allow(dead_code, clippy::manual_c_str_literals)] #![feature(rustc_private)] extern crate libc; diff --git a/src/tools/clippy/tests/ui/to_string_trait_impl.rs b/src/tools/clippy/tests/ui/to_string_trait_impl.rs new file mode 100644 index 00000000000..b0731632d45 --- /dev/null +++ b/src/tools/clippy/tests/ui/to_string_trait_impl.rs @@ -0,0 +1,31 @@ +#![warn(clippy::to_string_trait_impl)] + +use std::fmt::{self, Display}; + +struct Point { + x: usize, + y: usize, +} + +impl ToString for Point { + fn to_string(&self) -> String { + format!("({}, {})", self.x, self.y) + } +} + +struct Foo; + +impl Display for Foo { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "Foo") + } +} + +struct Bar; + +impl Bar { + #[allow(clippy::inherent_to_string)] + fn to_string(&self) -> String { + String::from("Bar") + } +} diff --git a/src/tools/clippy/tests/ui/to_string_trait_impl.stderr b/src/tools/clippy/tests/ui/to_string_trait_impl.stderr new file mode 100644 index 00000000000..55fa9f12c0e --- /dev/null +++ b/src/tools/clippy/tests/ui/to_string_trait_impl.stderr @@ -0,0 +1,16 @@ +error: direct implementation of `ToString` + --> $DIR/to_string_trait_impl.rs:10:1 + | +LL | / impl ToString for Point { +LL | | fn to_string(&self) -> String { +LL | | format!("({}, {})", self.x, self.y) +LL | | } +LL | | } + | |_^ + | + = help: prefer implementing `Display` instead + = note: `-D clippy::to-string-trait-impl` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::to_string_trait_impl)]` + +error: aborting due to 1 previous error + diff --git a/src/tools/clippy/tests/ui/unconditional_recursion.rs b/src/tools/clippy/tests/ui/unconditional_recursion.rs index 7b898a6e0e7..6ad3bde51cd 100644 --- a/src/tools/clippy/tests/ui/unconditional_recursion.rs +++ b/src/tools/clippy/tests/ui/unconditional_recursion.rs @@ -206,6 +206,7 @@ impl PartialEq for S8 { struct S9; +#[allow(clippy::to_string_trait_impl)] impl std::string::ToString for S9 { fn to_string(&self) -> String { //~^ ERROR: function cannot return without recursing @@ -215,6 +216,7 @@ impl std::string::ToString for S9 { struct S10; +#[allow(clippy::to_string_trait_impl)] impl std::string::ToString for S10 { fn to_string(&self) -> String { //~^ ERROR: function cannot return without recursing @@ -225,6 +227,7 @@ impl std::string::ToString for S10 { struct S11; +#[allow(clippy::to_string_trait_impl)] impl std::string::ToString for S11 { fn to_string(&self) -> String { //~^ ERROR: function cannot return without recursing @@ -288,4 +291,63 @@ impl PartialEq for S15<'_> { } } +mod issue12154 { + struct MyBox<T>(T); + + impl<T> std::ops::Deref for MyBox<T> { + type Target = T; + fn deref(&self) -> &T { + &self.0 + } + } + + impl<T: PartialEq> PartialEq for MyBox<T> { + fn eq(&self, other: &Self) -> bool { + (**self).eq(&**other) + } + } + + // Not necessarily related to the issue but another FP from the http crate that was fixed with it: + // https://docs.rs/http/latest/src/http/header/name.rs.html#1424 + // We used to simply peel refs from the LHS and RHS, so we couldn't differentiate + // between `PartialEq<T> for &T` and `PartialEq<&T> for T` impls. + #[derive(PartialEq)] + struct HeaderName; + impl<'a> PartialEq<&'a HeaderName> for HeaderName { + fn eq(&self, other: &&'a HeaderName) -> bool { + *self == **other + } + } + + impl<'a> PartialEq<HeaderName> for &'a HeaderName { + fn eq(&self, other: &HeaderName) -> bool { + *other == *self + } + } + + // Issue #12181 but also fixed by the same PR + struct Foo; + + impl Foo { + fn as_str(&self) -> &str { + "Foo" + } + } + + impl PartialEq for Foo { + fn eq(&self, other: &Self) -> bool { + self.as_str().eq(other.as_str()) + } + } + + impl<T> PartialEq<T> for Foo + where + for<'a> &'a str: PartialEq<T>, + { + fn eq(&self, other: &T) -> bool { + (&self.as_str()).eq(other) + } + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/unconditional_recursion.stderr b/src/tools/clippy/tests/ui/unconditional_recursion.stderr index 094b80d4586..93a5eac91d8 100644 --- a/src/tools/clippy/tests/ui/unconditional_recursion.stderr +++ b/src/tools/clippy/tests/ui/unconditional_recursion.stderr @@ -23,7 +23,7 @@ LL | self.eq(other) = help: a `loop` may express intention better if this is on purpose error: function cannot return without recursing - --> $DIR/unconditional_recursion.rs:210:5 + --> $DIR/unconditional_recursion.rs:211:5 | LL | fn to_string(&self) -> String { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing @@ -34,7 +34,7 @@ LL | self.to_string() = help: a `loop` may express intention better if this is on purpose error: function cannot return without recursing - --> $DIR/unconditional_recursion.rs:219:5 + --> $DIR/unconditional_recursion.rs:221:5 | LL | fn to_string(&self) -> String { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing @@ -45,7 +45,7 @@ LL | x.to_string() = help: a `loop` may express intention better if this is on purpose error: function cannot return without recursing - --> $DIR/unconditional_recursion.rs:229:5 + --> $DIR/unconditional_recursion.rs:232:5 | LL | fn to_string(&self) -> String { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing @@ -326,7 +326,7 @@ LL | mine == theirs | ^^^^^^^^^^^^^^ error: function cannot return without recursing - --> $DIR/unconditional_recursion.rs:244:5 + --> $DIR/unconditional_recursion.rs:247:5 | LL | / fn new() -> Self { LL | | @@ -335,13 +335,13 @@ LL | | } | |_____^ | note: recursive call site - --> $DIR/unconditional_recursion.rs:246:9 + --> $DIR/unconditional_recursion.rs:249:9 | LL | Self::default() | ^^^^^^^^^^^^^^^ error: function cannot return without recursing - --> $DIR/unconditional_recursion.rs:283:5 + --> $DIR/unconditional_recursion.rs:286:5 | LL | / fn eq(&self, other: &Self) -> bool { LL | | @@ -352,7 +352,7 @@ LL | | } | |_____^ | note: recursive call site - --> $DIR/unconditional_recursion.rs:287:9 + --> $DIR/unconditional_recursion.rs:290:9 | LL | mine.eq(theirs) | ^^^^^^^^^^^^^^^ diff --git a/src/tools/clippy/tests/ui/unnecessary_fold.fixed b/src/tools/clippy/tests/ui/unnecessary_fold.fixed index c884d26eb61..c5bc11b55ab 100644 --- a/src/tools/clippy/tests/ui/unnecessary_fold.fixed +++ b/src/tools/clippy/tests/ui/unnecessary_fold.fixed @@ -1,9 +1,15 @@ #![allow(dead_code)] +fn is_any(acc: bool, x: usize) -> bool { + acc || x > 2 +} + /// Calls which should trigger the `UNNECESSARY_FOLD` lint fn unnecessary_fold() { // Can be replaced by .any let _ = (0..3).any(|x| x > 2); + // Can be replaced by .any (checking suggestion) + let _ = (0..3).fold(false, is_any); // Can be replaced by .all let _ = (0..3).all(|x| x > 2); // Can be replaced by .sum diff --git a/src/tools/clippy/tests/ui/unnecessary_fold.rs b/src/tools/clippy/tests/ui/unnecessary_fold.rs index 2e6d6ba52eb..3a5136eeeae 100644 --- a/src/tools/clippy/tests/ui/unnecessary_fold.rs +++ b/src/tools/clippy/tests/ui/unnecessary_fold.rs @@ -1,9 +1,15 @@ #![allow(dead_code)] +fn is_any(acc: bool, x: usize) -> bool { + acc || x > 2 +} + /// Calls which should trigger the `UNNECESSARY_FOLD` lint fn unnecessary_fold() { // Can be replaced by .any let _ = (0..3).fold(false, |acc, x| acc || x > 2); + // Can be replaced by .any (checking suggestion) + let _ = (0..3).fold(false, |acc, x| is_any(acc, x)); // Can be replaced by .all let _ = (0..3).fold(true, |acc, x| acc && x > 2); // Can be replaced by .sum diff --git a/src/tools/clippy/tests/ui/unnecessary_fold.stderr b/src/tools/clippy/tests/ui/unnecessary_fold.stderr index f0d03963842..123d4a3be75 100644 --- a/src/tools/clippy/tests/ui/unnecessary_fold.stderr +++ b/src/tools/clippy/tests/ui/unnecessary_fold.stderr @@ -1,5 +1,5 @@ error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:6:20 + --> $DIR/unnecessary_fold.rs:10:20 | LL | let _ = (0..3).fold(false, |acc, x| acc || x > 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `any(|x| x > 2)` @@ -7,89 +7,98 @@ LL | let _ = (0..3).fold(false, |acc, x| acc || x > 2); = note: `-D clippy::unnecessary-fold` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::unnecessary_fold)]` +error: redundant closure + --> $DIR/unnecessary_fold.rs:12:32 + | +LL | let _ = (0..3).fold(false, |acc, x| is_any(acc, x)); + | ^^^^^^^^^^^^^^^^^^^^^^^ help: replace the closure with the function itself: `is_any` + | + = note: `-D clippy::redundant-closure` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::redundant_closure)]` + error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:8:20 + --> $DIR/unnecessary_fold.rs:14:20 | LL | let _ = (0..3).fold(true, |acc, x| acc && x > 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `all(|x| x > 2)` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:10:25 + --> $DIR/unnecessary_fold.rs:16:25 | LL | let _: i32 = (0..3).fold(0, |acc, x| acc + x); | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `sum()` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:12:25 + --> $DIR/unnecessary_fold.rs:18:25 | LL | let _: i32 = (0..3).fold(1, |acc, x| acc * x); | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `product()` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:17:41 + --> $DIR/unnecessary_fold.rs:23:41 | LL | let _: bool = (0..3).map(|x| 2 * x).fold(false, |acc, x| acc || x > 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `any(|x| x > 2)` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:47:10 + --> $DIR/unnecessary_fold.rs:53:10 | LL | .fold(false, |acc, x| acc || x > 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `any(|x| x > 2)` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:58:33 + --> $DIR/unnecessary_fold.rs:64:33 | LL | assert_eq!(map.values().fold(0, |x, y| x + y), 0); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `sum::<i32>()` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:61:30 + --> $DIR/unnecessary_fold.rs:67:30 | LL | let _ = map.values().fold(0, |x, y| x + y); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `sum::<i32>()` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:62:30 + --> $DIR/unnecessary_fold.rs:68:30 | LL | let _ = map.values().fold(1, |x, y| x * y); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `product::<i32>()` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:63:35 + --> $DIR/unnecessary_fold.rs:69:35 | LL | let _: i32 = map.values().fold(0, |x, y| x + y); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `sum()` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:64:35 + --> $DIR/unnecessary_fold.rs:70:35 | LL | let _: i32 = map.values().fold(1, |x, y| x * y); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `product()` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:65:31 + --> $DIR/unnecessary_fold.rs:71:31 | LL | anything(map.values().fold(0, |x, y| x + y)); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `sum::<i32>()` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:66:31 + --> $DIR/unnecessary_fold.rs:72:31 | LL | anything(map.values().fold(1, |x, y| x * y)); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `product::<i32>()` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:67:26 + --> $DIR/unnecessary_fold.rs:73:26 | LL | num(map.values().fold(0, |x, y| x + y)); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `sum()` error: this `.fold` can be written more succinctly using another method - --> $DIR/unnecessary_fold.rs:68:26 + --> $DIR/unnecessary_fold.rs:74:26 | LL | num(map.values().fold(1, |x, y| x * y)); | ^^^^^^^^^^^^^^^^^^^^^ help: try: `product()` -error: aborting due to 15 previous errors +error: aborting due to 16 previous errors diff --git a/src/tools/clippy/tests/ui/unnecessary_operation.fixed b/src/tools/clippy/tests/ui/unnecessary_operation.fixed index 463412daec0..11761c6c90e 100644 --- a/src/tools/clippy/tests/ui/unnecessary_operation.fixed +++ b/src/tools/clippy/tests/ui/unnecessary_operation.fixed @@ -106,4 +106,11 @@ fn main() { // Issue #11885 Cout << 16; + + // Issue #11575 + // Bad formatting is required to trigger the bug + #[rustfmt::skip] + 'label: { + break 'label + }; } diff --git a/src/tools/clippy/tests/ui/unnecessary_operation.rs b/src/tools/clippy/tests/ui/unnecessary_operation.rs index f0d28e28902..de0081289ac 100644 --- a/src/tools/clippy/tests/ui/unnecessary_operation.rs +++ b/src/tools/clippy/tests/ui/unnecessary_operation.rs @@ -110,4 +110,11 @@ fn main() { // Issue #11885 Cout << 16; + + // Issue #11575 + // Bad formatting is required to trigger the bug + #[rustfmt::skip] + 'label: { + break 'label + }; } diff --git a/src/tools/clippy/tests/ui/unnecessary_result_map_or_else.fixed b/src/tools/clippy/tests/ui/unnecessary_result_map_or_else.fixed new file mode 100644 index 00000000000..224e0b52d75 --- /dev/null +++ b/src/tools/clippy/tests/ui/unnecessary_result_map_or_else.fixed @@ -0,0 +1,61 @@ +#![warn(clippy::unnecessary_result_map_or_else)] +#![allow(clippy::unnecessary_literal_unwrap, clippy::let_and_return, clippy::let_unit_value)] + +fn main() { + let x: Result<(), ()> = Ok(()); + x.unwrap_or_else(|err| err); //~ ERROR: unused "map closure" when calling + + // Type ascribtion. + let x: Result<(), ()> = Ok(()); + x.unwrap_or_else(|err: ()| err); //~ ERROR: unused "map closure" when calling + + // Auto-deref. + let y = String::new(); + let x: Result<&String, &String> = Ok(&y); + let y: &str = x.unwrap_or_else(|err| err); //~ ERROR: unused "map closure" when calling + + // Temporary variable. + let x: Result<(), ()> = Ok(()); + x.unwrap_or_else(|err| err); + + // Should not warn. + let x: Result<usize, usize> = Ok(0); + x.map_or_else(|err| err, |n| n + 1); + + // Should not warn. + let y = (); + let x: Result<(), ()> = Ok(()); + x.map_or_else(|err| err, |_| y); + + // Should not warn. + let y = (); + let x: Result<(), ()> = Ok(()); + x.map_or_else( + |err| err, + |_| { + let tmp = y; + tmp + }, + ); + + // Should not warn. + let x: Result<usize, usize> = Ok(1); + x.map_or_else( + |err| err, + |n| { + let tmp = n + 1; + tmp + }, + ); + + // Should not warn. + let y = 0; + let x: Result<usize, usize> = Ok(1); + x.map_or_else( + |err| err, + |n| { + let tmp = n; + y + }, + ); +} diff --git a/src/tools/clippy/tests/ui/unnecessary_result_map_or_else.rs b/src/tools/clippy/tests/ui/unnecessary_result_map_or_else.rs new file mode 100644 index 00000000000..4fe950a4cfa --- /dev/null +++ b/src/tools/clippy/tests/ui/unnecessary_result_map_or_else.rs @@ -0,0 +1,69 @@ +#![warn(clippy::unnecessary_result_map_or_else)] +#![allow(clippy::unnecessary_literal_unwrap, clippy::let_and_return, clippy::let_unit_value)] + +fn main() { + let x: Result<(), ()> = Ok(()); + x.map_or_else(|err| err, |n| n); //~ ERROR: unused "map closure" when calling + + // Type ascribtion. + let x: Result<(), ()> = Ok(()); + x.map_or_else(|err: ()| err, |n: ()| n); //~ ERROR: unused "map closure" when calling + + // Auto-deref. + let y = String::new(); + let x: Result<&String, &String> = Ok(&y); + let y: &str = x.map_or_else(|err| err, |n| n); //~ ERROR: unused "map closure" when calling + + // Temporary variable. + let x: Result<(), ()> = Ok(()); + x.map_or_else( + //~^ ERROR: unused "map closure" when calling + |err| err, + |n| { + let tmp = n; + let tmp2 = tmp; + tmp2 + }, + ); + + // Should not warn. + let x: Result<usize, usize> = Ok(0); + x.map_or_else(|err| err, |n| n + 1); + + // Should not warn. + let y = (); + let x: Result<(), ()> = Ok(()); + x.map_or_else(|err| err, |_| y); + + // Should not warn. + let y = (); + let x: Result<(), ()> = Ok(()); + x.map_or_else( + |err| err, + |_| { + let tmp = y; + tmp + }, + ); + + // Should not warn. + let x: Result<usize, usize> = Ok(1); + x.map_or_else( + |err| err, + |n| { + let tmp = n + 1; + tmp + }, + ); + + // Should not warn. + let y = 0; + let x: Result<usize, usize> = Ok(1); + x.map_or_else( + |err| err, + |n| { + let tmp = n; + y + }, + ); +} diff --git a/src/tools/clippy/tests/ui/unnecessary_result_map_or_else.stderr b/src/tools/clippy/tests/ui/unnecessary_result_map_or_else.stderr new file mode 100644 index 00000000000..0f83be5d556 --- /dev/null +++ b/src/tools/clippy/tests/ui/unnecessary_result_map_or_else.stderr @@ -0,0 +1,35 @@ +error: unused "map closure" when calling `Result::map_or_else` value + --> $DIR/unnecessary_result_map_or_else.rs:6:5 + | +LL | x.map_or_else(|err| err, |n| n); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `unwrap_or_else`: `x.unwrap_or_else(|err| err)` + | + = note: `-D clippy::unnecessary-result-map-or-else` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::unnecessary_result_map_or_else)]` + +error: unused "map closure" when calling `Result::map_or_else` value + --> $DIR/unnecessary_result_map_or_else.rs:10:5 + | +LL | x.map_or_else(|err: ()| err, |n: ()| n); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `unwrap_or_else`: `x.unwrap_or_else(|err: ()| err)` + +error: unused "map closure" when calling `Result::map_or_else` value + --> $DIR/unnecessary_result_map_or_else.rs:15:19 + | +LL | let y: &str = x.map_or_else(|err| err, |n| n); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `unwrap_or_else`: `x.unwrap_or_else(|err| err)` + +error: unused "map closure" when calling `Result::map_or_else` value + --> $DIR/unnecessary_result_map_or_else.rs:19:5 + | +LL | / x.map_or_else( +LL | | +LL | | |err| err, +LL | | |n| { +... | +LL | | }, +LL | | ); + | |_____^ help: consider using `unwrap_or_else`: `x.unwrap_or_else(|err| err)` + +error: aborting due to 4 previous errors + diff --git a/src/tools/clippy/tests/ui/unnecessary_to_owned.fixed b/src/tools/clippy/tests/ui/unnecessary_to_owned.fixed index 2dd1d746626..7f01c981a93 100644 --- a/src/tools/clippy/tests/ui/unnecessary_to_owned.fixed +++ b/src/tools/clippy/tests/ui/unnecessary_to_owned.fixed @@ -27,6 +27,7 @@ impl AsRef<str> for X { } } +#[allow(clippy::to_string_trait_impl)] impl ToString for X { fn to_string(&self) -> String { self.0.to_string() @@ -265,6 +266,7 @@ mod issue_8507 { } } + #[allow(clippy::to_string_trait_impl)] impl ToString for Y { fn to_string(&self) -> String { self.0.to_string() @@ -338,6 +340,7 @@ mod issue_9317 { struct Bytes {} + #[allow(clippy::to_string_trait_impl)] impl ToString for Bytes { fn to_string(&self) -> String { "123".to_string() diff --git a/src/tools/clippy/tests/ui/unnecessary_to_owned.rs b/src/tools/clippy/tests/ui/unnecessary_to_owned.rs index 17fad33402b..a270ed1e1c2 100644 --- a/src/tools/clippy/tests/ui/unnecessary_to_owned.rs +++ b/src/tools/clippy/tests/ui/unnecessary_to_owned.rs @@ -27,6 +27,7 @@ impl AsRef<str> for X { } } +#[allow(clippy::to_string_trait_impl)] impl ToString for X { fn to_string(&self) -> String { self.0.to_string() @@ -265,6 +266,7 @@ mod issue_8507 { } } + #[allow(clippy::to_string_trait_impl)] impl ToString for Y { fn to_string(&self) -> String { self.0.to_string() @@ -338,6 +340,7 @@ mod issue_9317 { struct Bytes {} + #[allow(clippy::to_string_trait_impl)] impl ToString for Bytes { fn to_string(&self) -> String { "123".to_string() diff --git a/src/tools/clippy/tests/ui/unnecessary_to_owned.stderr b/src/tools/clippy/tests/ui/unnecessary_to_owned.stderr index ad6fa422b8c..95ff5f2ec2c 100644 --- a/src/tools/clippy/tests/ui/unnecessary_to_owned.stderr +++ b/src/tools/clippy/tests/ui/unnecessary_to_owned.stderr @@ -1,11 +1,11 @@ error: redundant clone - --> $DIR/unnecessary_to_owned.rs:154:64 + --> $DIR/unnecessary_to_owned.rs:155:64 | LL | require_c_str(&CString::from_vec_with_nul(vec![0]).unwrap().to_owned()); | ^^^^^^^^^^^ help: remove this | note: this value is dropped without further use - --> $DIR/unnecessary_to_owned.rs:154:20 + --> $DIR/unnecessary_to_owned.rs:155:20 | LL | require_c_str(&CString::from_vec_with_nul(vec![0]).unwrap().to_owned()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -13,55 +13,55 @@ LL | require_c_str(&CString::from_vec_with_nul(vec![0]).unwrap().to_owned()) = help: to override `-D warnings` add `#[allow(clippy::redundant_clone)]` error: redundant clone - --> $DIR/unnecessary_to_owned.rs:155:40 + --> $DIR/unnecessary_to_owned.rs:156:40 | LL | require_os_str(&OsString::from("x").to_os_string()); | ^^^^^^^^^^^^^^^ help: remove this | note: this value is dropped without further use - --> $DIR/unnecessary_to_owned.rs:155:21 + --> $DIR/unnecessary_to_owned.rs:156:21 | LL | require_os_str(&OsString::from("x").to_os_string()); | ^^^^^^^^^^^^^^^^^^^ error: redundant clone - --> $DIR/unnecessary_to_owned.rs:156:48 + --> $DIR/unnecessary_to_owned.rs:157:48 | LL | require_path(&std::path::PathBuf::from("x").to_path_buf()); | ^^^^^^^^^^^^^^ help: remove this | note: this value is dropped without further use - --> $DIR/unnecessary_to_owned.rs:156:19 + --> $DIR/unnecessary_to_owned.rs:157:19 | LL | require_path(&std::path::PathBuf::from("x").to_path_buf()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: redundant clone - --> $DIR/unnecessary_to_owned.rs:157:35 + --> $DIR/unnecessary_to_owned.rs:158:35 | LL | require_str(&String::from("x").to_string()); | ^^^^^^^^^^^^ help: remove this | note: this value is dropped without further use - --> $DIR/unnecessary_to_owned.rs:157:18 + --> $DIR/unnecessary_to_owned.rs:158:18 | LL | require_str(&String::from("x").to_string()); | ^^^^^^^^^^^^^^^^^ error: redundant clone - --> $DIR/unnecessary_to_owned.rs:158:39 + --> $DIR/unnecessary_to_owned.rs:159:39 | LL | require_slice(&[String::from("x")].to_owned()); | ^^^^^^^^^^^ help: remove this | note: this value is dropped without further use - --> $DIR/unnecessary_to_owned.rs:158:20 + --> $DIR/unnecessary_to_owned.rs:159:20 | LL | require_slice(&[String::from("x")].to_owned()); | ^^^^^^^^^^^^^^^^^^^ error: unnecessary use of `into_owned` - --> $DIR/unnecessary_to_owned.rs:63:36 + --> $DIR/unnecessary_to_owned.rs:64:36 | LL | require_c_str(&Cow::from(c_str).into_owned()); | ^^^^^^^^^^^^^ help: remove this @@ -70,415 +70,415 @@ LL | require_c_str(&Cow::from(c_str).into_owned()); = help: to override `-D warnings` add `#[allow(clippy::unnecessary_to_owned)]` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:64:19 + --> $DIR/unnecessary_to_owned.rs:65:19 | LL | require_c_str(&c_str.to_owned()); | ^^^^^^^^^^^^^^^^^ help: use: `c_str` error: unnecessary use of `to_os_string` - --> $DIR/unnecessary_to_owned.rs:66:20 + --> $DIR/unnecessary_to_owned.rs:67:20 | LL | require_os_str(&os_str.to_os_string()); | ^^^^^^^^^^^^^^^^^^^^^^ help: use: `os_str` error: unnecessary use of `into_owned` - --> $DIR/unnecessary_to_owned.rs:67:38 + --> $DIR/unnecessary_to_owned.rs:68:38 | LL | require_os_str(&Cow::from(os_str).into_owned()); | ^^^^^^^^^^^^^ help: remove this error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:68:20 + --> $DIR/unnecessary_to_owned.rs:69:20 | LL | require_os_str(&os_str.to_owned()); | ^^^^^^^^^^^^^^^^^^ help: use: `os_str` error: unnecessary use of `to_path_buf` - --> $DIR/unnecessary_to_owned.rs:70:18 + --> $DIR/unnecessary_to_owned.rs:71:18 | LL | require_path(&path.to_path_buf()); | ^^^^^^^^^^^^^^^^^^^ help: use: `path` error: unnecessary use of `into_owned` - --> $DIR/unnecessary_to_owned.rs:71:34 + --> $DIR/unnecessary_to_owned.rs:72:34 | LL | require_path(&Cow::from(path).into_owned()); | ^^^^^^^^^^^^^ help: remove this error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:72:18 + --> $DIR/unnecessary_to_owned.rs:73:18 | LL | require_path(&path.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `path` error: unnecessary use of `to_string` - --> $DIR/unnecessary_to_owned.rs:74:17 + --> $DIR/unnecessary_to_owned.rs:75:17 | LL | require_str(&s.to_string()); | ^^^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `into_owned` - --> $DIR/unnecessary_to_owned.rs:75:30 + --> $DIR/unnecessary_to_owned.rs:76:30 | LL | require_str(&Cow::from(s).into_owned()); | ^^^^^^^^^^^^^ help: remove this error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:76:17 + --> $DIR/unnecessary_to_owned.rs:77:17 | LL | require_str(&s.to_owned()); | ^^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_string` - --> $DIR/unnecessary_to_owned.rs:77:17 + --> $DIR/unnecessary_to_owned.rs:78:17 | LL | require_str(&x_ref.to_string()); | ^^^^^^^^^^^^^^^^^^ help: use: `x_ref.as_ref()` error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned.rs:79:19 + --> $DIR/unnecessary_to_owned.rs:80:19 | LL | require_slice(&slice.to_vec()); | ^^^^^^^^^^^^^^^ help: use: `slice` error: unnecessary use of `into_owned` - --> $DIR/unnecessary_to_owned.rs:80:36 + --> $DIR/unnecessary_to_owned.rs:81:36 | LL | require_slice(&Cow::from(slice).into_owned()); | ^^^^^^^^^^^^^ help: remove this error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:81:19 + --> $DIR/unnecessary_to_owned.rs:82:19 | LL | require_slice(&array.to_owned()); | ^^^^^^^^^^^^^^^^^ help: use: `array.as_ref()` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:82:19 + --> $DIR/unnecessary_to_owned.rs:83:19 | LL | require_slice(&array_ref.to_owned()); | ^^^^^^^^^^^^^^^^^^^^^ help: use: `array_ref.as_ref()` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:83:19 + --> $DIR/unnecessary_to_owned.rs:84:19 | LL | require_slice(&slice.to_owned()); | ^^^^^^^^^^^^^^^^^ help: use: `slice` error: unnecessary use of `into_owned` - --> $DIR/unnecessary_to_owned.rs:86:42 + --> $DIR/unnecessary_to_owned.rs:87:42 | LL | require_x(&Cow::<X>::Owned(x.clone()).into_owned()); | ^^^^^^^^^^^^^ help: remove this error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:89:25 + --> $DIR/unnecessary_to_owned.rs:90:25 | LL | require_deref_c_str(c_str.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `c_str` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:90:26 + --> $DIR/unnecessary_to_owned.rs:91:26 | LL | require_deref_os_str(os_str.to_owned()); | ^^^^^^^^^^^^^^^^^ help: use: `os_str` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:91:24 + --> $DIR/unnecessary_to_owned.rs:92:24 | LL | require_deref_path(path.to_owned()); | ^^^^^^^^^^^^^^^ help: use: `path` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:92:23 + --> $DIR/unnecessary_to_owned.rs:93:23 | LL | require_deref_str(s.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:93:25 + --> $DIR/unnecessary_to_owned.rs:94:25 | LL | require_deref_slice(slice.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `slice` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:95:30 + --> $DIR/unnecessary_to_owned.rs:96:30 | LL | require_impl_deref_c_str(c_str.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `c_str` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:96:31 + --> $DIR/unnecessary_to_owned.rs:97:31 | LL | require_impl_deref_os_str(os_str.to_owned()); | ^^^^^^^^^^^^^^^^^ help: use: `os_str` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:97:29 + --> $DIR/unnecessary_to_owned.rs:98:29 | LL | require_impl_deref_path(path.to_owned()); | ^^^^^^^^^^^^^^^ help: use: `path` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:98:28 + --> $DIR/unnecessary_to_owned.rs:99:28 | LL | require_impl_deref_str(s.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:99:30 + --> $DIR/unnecessary_to_owned.rs:100:30 | LL | require_impl_deref_slice(slice.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `slice` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:101:29 + --> $DIR/unnecessary_to_owned.rs:102:29 | LL | require_deref_str_slice(s.to_owned(), slice.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:101:43 + --> $DIR/unnecessary_to_owned.rs:102:43 | LL | require_deref_str_slice(s.to_owned(), slice.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `slice` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:102:29 + --> $DIR/unnecessary_to_owned.rs:103:29 | LL | require_deref_slice_str(slice.to_owned(), s.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `slice` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:102:47 + --> $DIR/unnecessary_to_owned.rs:103:47 | LL | require_deref_slice_str(slice.to_owned(), s.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:104:26 + --> $DIR/unnecessary_to_owned.rs:105:26 | LL | require_as_ref_c_str(c_str.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `c_str` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:105:27 + --> $DIR/unnecessary_to_owned.rs:106:27 | LL | require_as_ref_os_str(os_str.to_owned()); | ^^^^^^^^^^^^^^^^^ help: use: `os_str` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:106:25 + --> $DIR/unnecessary_to_owned.rs:107:25 | LL | require_as_ref_path(path.to_owned()); | ^^^^^^^^^^^^^^^ help: use: `path` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:107:24 + --> $DIR/unnecessary_to_owned.rs:108:24 | LL | require_as_ref_str(s.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:108:24 + --> $DIR/unnecessary_to_owned.rs:109:24 | LL | require_as_ref_str(x.to_owned()); | ^^^^^^^^^^^^ help: use: `&x` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:109:26 + --> $DIR/unnecessary_to_owned.rs:110:26 | LL | require_as_ref_slice(array.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `array` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:110:26 + --> $DIR/unnecessary_to_owned.rs:111:26 | LL | require_as_ref_slice(array_ref.to_owned()); | ^^^^^^^^^^^^^^^^^^^^ help: use: `array_ref` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:111:26 + --> $DIR/unnecessary_to_owned.rs:112:26 | LL | require_as_ref_slice(slice.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `slice` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:113:31 + --> $DIR/unnecessary_to_owned.rs:114:31 | LL | require_impl_as_ref_c_str(c_str.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `c_str` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:114:32 + --> $DIR/unnecessary_to_owned.rs:115:32 | LL | require_impl_as_ref_os_str(os_str.to_owned()); | ^^^^^^^^^^^^^^^^^ help: use: `os_str` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:115:30 + --> $DIR/unnecessary_to_owned.rs:116:30 | LL | require_impl_as_ref_path(path.to_owned()); | ^^^^^^^^^^^^^^^ help: use: `path` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:116:29 + --> $DIR/unnecessary_to_owned.rs:117:29 | LL | require_impl_as_ref_str(s.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:117:29 + --> $DIR/unnecessary_to_owned.rs:118:29 | LL | require_impl_as_ref_str(x.to_owned()); | ^^^^^^^^^^^^ help: use: `&x` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:118:31 + --> $DIR/unnecessary_to_owned.rs:119:31 | LL | require_impl_as_ref_slice(array.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `array` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:119:31 + --> $DIR/unnecessary_to_owned.rs:120:31 | LL | require_impl_as_ref_slice(array_ref.to_owned()); | ^^^^^^^^^^^^^^^^^^^^ help: use: `array_ref` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:120:31 + --> $DIR/unnecessary_to_owned.rs:121:31 | LL | require_impl_as_ref_slice(slice.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `slice` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:122:30 + --> $DIR/unnecessary_to_owned.rs:123:30 | LL | require_as_ref_str_slice(s.to_owned(), array.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:122:44 + --> $DIR/unnecessary_to_owned.rs:123:44 | LL | require_as_ref_str_slice(s.to_owned(), array.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `array` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:123:30 + --> $DIR/unnecessary_to_owned.rs:124:30 | LL | require_as_ref_str_slice(s.to_owned(), array_ref.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:123:44 + --> $DIR/unnecessary_to_owned.rs:124:44 | LL | require_as_ref_str_slice(s.to_owned(), array_ref.to_owned()); | ^^^^^^^^^^^^^^^^^^^^ help: use: `array_ref` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:124:30 + --> $DIR/unnecessary_to_owned.rs:125:30 | LL | require_as_ref_str_slice(s.to_owned(), slice.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:124:44 + --> $DIR/unnecessary_to_owned.rs:125:44 | LL | require_as_ref_str_slice(s.to_owned(), slice.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `slice` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:125:30 + --> $DIR/unnecessary_to_owned.rs:126:30 | LL | require_as_ref_slice_str(array.to_owned(), s.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `array` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:125:48 + --> $DIR/unnecessary_to_owned.rs:126:48 | LL | require_as_ref_slice_str(array.to_owned(), s.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:126:30 + --> $DIR/unnecessary_to_owned.rs:127:30 | LL | require_as_ref_slice_str(array_ref.to_owned(), s.to_owned()); | ^^^^^^^^^^^^^^^^^^^^ help: use: `array_ref` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:126:52 + --> $DIR/unnecessary_to_owned.rs:127:52 | LL | require_as_ref_slice_str(array_ref.to_owned(), s.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:127:30 + --> $DIR/unnecessary_to_owned.rs:128:30 | LL | require_as_ref_slice_str(slice.to_owned(), s.to_owned()); | ^^^^^^^^^^^^^^^^ help: use: `slice` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:127:48 + --> $DIR/unnecessary_to_owned.rs:128:48 | LL | require_as_ref_slice_str(slice.to_owned(), s.to_owned()); | ^^^^^^^^^^^^ help: use: `s` error: unnecessary use of `to_string` - --> $DIR/unnecessary_to_owned.rs:129:20 + --> $DIR/unnecessary_to_owned.rs:130:20 | LL | let _ = x.join(&x_ref.to_string()); | ^^^^^^^^^^^^^^^^^^ help: use: `x_ref` error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned.rs:131:13 + --> $DIR/unnecessary_to_owned.rs:132:13 | LL | let _ = slice.to_vec().into_iter(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `slice.iter().copied()` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:132:13 + --> $DIR/unnecessary_to_owned.rs:133:13 | LL | let _ = slice.to_owned().into_iter(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `slice.iter().copied()` error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned.rs:133:13 + --> $DIR/unnecessary_to_owned.rs:134:13 | LL | let _ = [std::path::PathBuf::new()][..].to_vec().into_iter(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `[std::path::PathBuf::new()][..].iter().cloned()` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:134:13 + --> $DIR/unnecessary_to_owned.rs:135:13 | LL | let _ = [std::path::PathBuf::new()][..].to_owned().into_iter(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `[std::path::PathBuf::new()][..].iter().cloned()` error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned.rs:136:13 + --> $DIR/unnecessary_to_owned.rs:137:13 | LL | let _ = IntoIterator::into_iter(slice.to_vec()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `slice.iter().copied()` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:137:13 + --> $DIR/unnecessary_to_owned.rs:138:13 | LL | let _ = IntoIterator::into_iter(slice.to_owned()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `slice.iter().copied()` error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned.rs:138:13 + --> $DIR/unnecessary_to_owned.rs:139:13 | LL | let _ = IntoIterator::into_iter([std::path::PathBuf::new()][..].to_vec()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `[std::path::PathBuf::new()][..].iter().cloned()` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned.rs:139:13 + --> $DIR/unnecessary_to_owned.rs:140:13 | LL | let _ = IntoIterator::into_iter([std::path::PathBuf::new()][..].to_owned()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `[std::path::PathBuf::new()][..].iter().cloned()` error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned.rs:201:14 + --> $DIR/unnecessary_to_owned.rs:202:14 | LL | for t in file_types.to_vec() { | ^^^^^^^^^^^^^^^^^^^ @@ -494,31 +494,31 @@ LL + let path = match get_file_path(t) { | error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned.rs:224:14 + --> $DIR/unnecessary_to_owned.rs:225:14 | LL | let _ = &["x"][..].to_vec().into_iter(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `["x"][..].iter().cloned()` error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned.rs:229:14 + --> $DIR/unnecessary_to_owned.rs:230:14 | LL | let _ = &["x"][..].to_vec().into_iter(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `["x"][..].iter().copied()` error: unnecessary use of `to_string` - --> $DIR/unnecessary_to_owned.rs:276:24 + --> $DIR/unnecessary_to_owned.rs:278:24 | LL | Box::new(build(y.to_string())) | ^^^^^^^^^^^^^ help: use: `y` error: unnecessary use of `to_string` - --> $DIR/unnecessary_to_owned.rs:384:12 + --> $DIR/unnecessary_to_owned.rs:387:12 | LL | id("abc".to_string()) | ^^^^^^^^^^^^^^^^^ help: use: `"abc"` error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned.rs:527:37 + --> $DIR/unnecessary_to_owned.rs:530:37 | LL | IntoFuture::into_future(foo([].to_vec(), &0)); | ^^^^^^^^^^^ help: use: `[]` diff --git a/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.fixed b/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.fixed index f87c898f9b7..e0ba216f41b 100644 --- a/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.fixed +++ b/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.fixed @@ -8,6 +8,7 @@ impl AsRef<str> for Issue12068 { } } +#[allow(clippy::to_string_trait_impl)] impl ToString for Issue12068 { fn to_string(&self) -> String { String::new() diff --git a/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.rs b/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.rs index db5719e5880..70efc6ebba5 100644 --- a/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.rs +++ b/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.rs @@ -8,6 +8,7 @@ impl AsRef<str> for Issue12068 { } } +#[allow(clippy::to_string_trait_impl)] impl ToString for Issue12068 { fn to_string(&self) -> String { String::new() diff --git a/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.stderr b/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.stderr index 4cfaeed3384..9aea15b48bf 100644 --- a/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.stderr +++ b/src/tools/clippy/tests/ui/unnecessary_to_owned_on_split.stderr @@ -1,5 +1,5 @@ error: unnecessary use of `to_string` - --> $DIR/unnecessary_to_owned_on_split.rs:18:13 + --> $DIR/unnecessary_to_owned_on_split.rs:19:13 | LL | let _ = "a".to_string().split('a').next().unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `"a".split('a')` @@ -8,49 +8,49 @@ LL | let _ = "a".to_string().split('a').next().unwrap(); = help: to override `-D warnings` add `#[allow(clippy::unnecessary_to_owned)]` error: unnecessary use of `to_string` - --> $DIR/unnecessary_to_owned_on_split.rs:20:13 + --> $DIR/unnecessary_to_owned_on_split.rs:21:13 | LL | let _ = "a".to_string().split("a").next().unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `"a".split("a")` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned_on_split.rs:22:13 + --> $DIR/unnecessary_to_owned_on_split.rs:23:13 | LL | let _ = "a".to_owned().split('a').next().unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `"a".split('a')` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned_on_split.rs:24:13 + --> $DIR/unnecessary_to_owned_on_split.rs:25:13 | LL | let _ = "a".to_owned().split("a").next().unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `"a".split("a")` error: unnecessary use of `to_string` - --> $DIR/unnecessary_to_owned_on_split.rs:26:13 + --> $DIR/unnecessary_to_owned_on_split.rs:27:13 | LL | let _ = Issue12068.to_string().split('a').next().unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `Issue12068.as_ref().split('a')` error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned_on_split.rs:29:13 + --> $DIR/unnecessary_to_owned_on_split.rs:30:13 | LL | let _ = [1].to_vec().split(|x| *x == 2).next().unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `[1].split(|x| *x == 2)` error: unnecessary use of `to_vec` - --> $DIR/unnecessary_to_owned_on_split.rs:31:13 + --> $DIR/unnecessary_to_owned_on_split.rs:32:13 | LL | let _ = [1].to_vec().split(|x| *x == 2).next().unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `[1].split(|x| *x == 2)` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned_on_split.rs:33:13 + --> $DIR/unnecessary_to_owned_on_split.rs:34:13 | LL | let _ = [1].to_owned().split(|x| *x == 2).next().unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `[1].split(|x| *x == 2)` error: unnecessary use of `to_owned` - --> $DIR/unnecessary_to_owned_on_split.rs:35:13 + --> $DIR/unnecessary_to_owned_on_split.rs:36:13 | LL | let _ = [1].to_owned().split(|x| *x == 2).next().unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `[1].split(|x| *x == 2)` diff --git a/src/tools/clippy/tests/ui/unused_io_amount.rs b/src/tools/clippy/tests/ui/unused_io_amount.rs index 9974600dad5..7e5a10c911b 100644 --- a/src/tools/clippy/tests/ui/unused_io_amount.rs +++ b/src/tools/clippy/tests/ui/unused_io_amount.rs @@ -229,4 +229,47 @@ fn on_return_should_not_raise<T: io::Read + io::Write>(s: &mut T) -> io::Result< s.read(&mut buf) } +pub fn unwrap_in_block(rdr: &mut dyn std::io::Read) -> std::io::Result<usize> { + let read = { rdr.read(&mut [0])? }; + Ok(read) +} + +pub fn consumed_example(rdr: &mut dyn std::io::Read) { + match rdr.read(&mut [0]) { + Ok(0) => println!("EOF"), + Ok(_) => println!("fully read"), + Err(_) => println!("fail"), + }; + match rdr.read(&mut [0]) { + Ok(0) => println!("EOF"), + Ok(_) => println!("fully read"), + Err(_) => println!("fail"), + } +} + +pub fn unreachable_or_panic(rdr: &mut dyn std::io::Read) { + { + match rdr.read(&mut [0]) { + Ok(_) => unreachable!(), + Err(_) => println!("expected"), + } + } + + { + match rdr.read(&mut [0]) { + Ok(_) => panic!(), + Err(_) => println!("expected"), + } + } +} + +pub fn wildcards(rdr: &mut dyn std::io::Read) { + { + match rdr.read(&mut [0]) { + Ok(1) => todo!(), + _ => todo!(), + } + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/unused_io_amount.stderr b/src/tools/clippy/tests/ui/unused_io_amount.stderr index 4af56d264bf..1aab56966a8 100644 --- a/src/tools/clippy/tests/ui/unused_io_amount.stderr +++ b/src/tools/clippy/tests/ui/unused_io_amount.stderr @@ -180,7 +180,7 @@ note: the result is consumed here, but the amount of I/O bytes remains unhandled --> $DIR/unused_io_amount.rs:149:9 | LL | Ok(_) => todo!(), - | ^^^^^^^^^^^^^^^^ + | ^^^^^ error: read amount is not handled --> $DIR/unused_io_amount.rs:155:11 @@ -193,7 +193,7 @@ note: the result is consumed here, but the amount of I/O bytes remains unhandled --> $DIR/unused_io_amount.rs:157:9 | LL | Ok(_) => todo!(), - | ^^^^^^^^^^^^^^^^ + | ^^^^^ error: read amount is not handled --> $DIR/unused_io_amount.rs:164:11 @@ -206,7 +206,7 @@ note: the result is consumed here, but the amount of I/O bytes remains unhandled --> $DIR/unused_io_amount.rs:166:9 | LL | Ok(_) => todo!(), - | ^^^^^^^^^^^^^^^^ + | ^^^^^ error: written amount is not handled --> $DIR/unused_io_amount.rs:173:11 @@ -219,7 +219,7 @@ note: the result is consumed here, but the amount of I/O bytes remains unhandled --> $DIR/unused_io_amount.rs:175:9 | LL | Ok(_) => todo!(), - | ^^^^^^^^^^^^^^^^ + | ^^^^^ error: read amount is not handled --> $DIR/unused_io_amount.rs:186:8 diff --git a/src/tools/clippy/tests/ui/while_let_on_iterator.fixed b/src/tools/clippy/tests/ui/while_let_on_iterator.fixed index d628d2227b7..59b5c858d04 100644 --- a/src/tools/clippy/tests/ui/while_let_on_iterator.fixed +++ b/src/tools/clippy/tests/ui/while_let_on_iterator.fixed @@ -406,7 +406,7 @@ fn issue_8113() { fn fn_once_closure() { let mut it = 0..10; (|| { - for x in it { + for x in it.by_ref() { if x % 2 == 0 { break; } @@ -441,7 +441,19 @@ fn fn_once_closure() { break; } } - }) + }); + + trait MySpecialFnMut: FnOnce() {} + impl<T: FnOnce()> MySpecialFnMut for T {} + fn f4(_: impl MySpecialFnMut) {} + let mut it = 0..10; + f4(|| { + for x in it { + if x % 2 == 0 { + break; + } + } + }); } fn main() { diff --git a/src/tools/clippy/tests/ui/while_let_on_iterator.rs b/src/tools/clippy/tests/ui/while_let_on_iterator.rs index 525dbbaaab6..559513d5694 100644 --- a/src/tools/clippy/tests/ui/while_let_on_iterator.rs +++ b/src/tools/clippy/tests/ui/while_let_on_iterator.rs @@ -441,7 +441,19 @@ fn fn_once_closure() { break; } } - }) + }); + + trait MySpecialFnMut: FnOnce() {} + impl<T: FnOnce()> MySpecialFnMut for T {} + fn f4(_: impl MySpecialFnMut) {} + let mut it = 0..10; + f4(|| { + while let Some(x) = it.next() { + if x % 2 == 0 { + break; + } + } + }); } fn main() { diff --git a/src/tools/clippy/tests/ui/while_let_on_iterator.stderr b/src/tools/clippy/tests/ui/while_let_on_iterator.stderr index cdc83b81667..7b9a9dc049a 100644 --- a/src/tools/clippy/tests/ui/while_let_on_iterator.stderr +++ b/src/tools/clippy/tests/ui/while_let_on_iterator.stderr @@ -131,7 +131,7 @@ error: this loop could be written as a `for` loop --> $DIR/while_let_on_iterator.rs:409:9 | LL | while let Some(x) = it.next() { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it.by_ref()` error: this loop could be written as a `for` loop --> $DIR/while_let_on_iterator.rs:419:9 @@ -152,10 +152,16 @@ LL | while let Some(x) = it.next() { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it` error: this loop could be written as a `for` loop - --> $DIR/while_let_on_iterator.rs:449:5 + --> $DIR/while_let_on_iterator.rs:451:9 + | +LL | while let Some(x) = it.next() { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for x in it` + +error: this loop could be written as a `for` loop + --> $DIR/while_let_on_iterator.rs:461:5 | LL | while let Some(..) = it.next() { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `for _ in it` -error: aborting due to 26 previous errors +error: aborting due to 27 previous errors |