diff options
Diffstat (limited to 'src/tools/clippy/tests')
35 files changed, 1535 insertions, 211 deletions
diff --git a/src/tools/clippy/tests/ui-internal/unnecessary_def_path_hardcoded_path.stderr b/src/tools/clippy/tests/ui-internal/unnecessary_def_path_hardcoded_path.stderr index 2a240cc249b..c1a10ba55ef 100644 --- a/src/tools/clippy/tests/ui-internal/unnecessary_def_path_hardcoded_path.stderr +++ b/src/tools/clippy/tests/ui-internal/unnecessary_def_path_hardcoded_path.stderr @@ -1,19 +1,19 @@ error: hardcoded path to a diagnostic item - --> $DIR/unnecessary_def_path_hardcoded_path.rs:10:36 + --> $DIR/unnecessary_def_path_hardcoded_path.rs:12:43 | -LL | const DEREF_TRAIT: [&str; 4] = ["core", "ops", "deref", "Deref"]; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +LL | const DEREF_TRAIT_METHOD: [&str; 5] = ["core", "ops", "deref", "Deref", "deref"]; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = help: convert all references to use `sym::Deref` + = help: convert all references to use `sym::deref_method` = note: `-D clippy::unnecessary-def-path` implied by `-D warnings` error: hardcoded path to a diagnostic item - --> $DIR/unnecessary_def_path_hardcoded_path.rs:12:43 + --> $DIR/unnecessary_def_path_hardcoded_path.rs:10:36 | -LL | const DEREF_TRAIT_METHOD: [&str; 5] = ["core", "ops", "deref", "Deref", "deref"]; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +LL | const DEREF_TRAIT: [&str; 4] = ["core", "ops", "deref", "Deref"]; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | - = help: convert all references to use `sym::deref_method` + = help: convert all references to use `sym::Deref` error: hardcoded path to a language item --> $DIR/unnecessary_def_path_hardcoded_path.rs:11:40 diff --git a/src/tools/clippy/tests/ui/auxiliary/macro_rules.rs b/src/tools/clippy/tests/ui/auxiliary/macro_rules.rs index 1e5f20e8c39..a13af565203 100644 --- a/src/tools/clippy/tests/ui/auxiliary/macro_rules.rs +++ b/src/tools/clippy/tests/ui/auxiliary/macro_rules.rs @@ -149,3 +149,22 @@ macro_rules! almost_complete_range { let _ = '0'..'9'; }; } + +#[macro_export] +macro_rules! unsafe_macro { + () => { + unsafe { + *core::ptr::null::<()>(); + *core::ptr::null::<()>(); + } + }; +} + +#[macro_export] +macro_rules! needless_lifetime { + () => { + fn needless_lifetime<'a>(x: &'a u8) -> &'a u8 { + unimplemented!() + } + }; +} diff --git a/src/tools/clippy/tests/ui/bool_assert_comparison.fixed b/src/tools/clippy/tests/ui/bool_assert_comparison.fixed index 95f35a61bb2..b8dd92906c8 100644 --- a/src/tools/clippy/tests/ui/bool_assert_comparison.fixed +++ b/src/tools/clippy/tests/ui/bool_assert_comparison.fixed @@ -86,7 +86,7 @@ fn main() { let b = ImplNotTraitWithBool; assert_eq!("a".len(), 1); - assert!("a".is_empty()); + assert!(!"a".is_empty()); assert!("".is_empty()); assert!("".is_empty()); assert_eq!(a!(), b!()); @@ -97,16 +97,16 @@ fn main() { assert_ne!("a".len(), 1); assert!("a".is_empty()); - assert!("".is_empty()); - assert!("".is_empty()); + assert!(!"".is_empty()); + assert!(!"".is_empty()); assert_ne!(a!(), b!()); assert_ne!(a!(), "".is_empty()); assert_ne!("".is_empty(), b!()); assert_ne!(a, true); - assert!(b); + assert!(!b); debug_assert_eq!("a".len(), 1); - debug_assert!("a".is_empty()); + debug_assert!(!"a".is_empty()); debug_assert!("".is_empty()); debug_assert!("".is_empty()); debug_assert_eq!(a!(), b!()); @@ -117,27 +117,27 @@ fn main() { debug_assert_ne!("a".len(), 1); debug_assert!("a".is_empty()); - debug_assert!("".is_empty()); - debug_assert!("".is_empty()); + debug_assert!(!"".is_empty()); + debug_assert!(!"".is_empty()); debug_assert_ne!(a!(), b!()); debug_assert_ne!(a!(), "".is_empty()); debug_assert_ne!("".is_empty(), b!()); debug_assert_ne!(a, true); - debug_assert!(b); + debug_assert!(!b); // assert with error messages assert_eq!("a".len(), 1, "tadam {}", 1); assert_eq!("a".len(), 1, "tadam {}", true); - assert!("a".is_empty(), "tadam {}", 1); - assert!("a".is_empty(), "tadam {}", true); - assert!("a".is_empty(), "tadam {}", true); + assert!(!"a".is_empty(), "tadam {}", 1); + assert!(!"a".is_empty(), "tadam {}", true); + assert!(!"a".is_empty(), "tadam {}", true); assert_eq!(a, true, "tadam {}", false); debug_assert_eq!("a".len(), 1, "tadam {}", 1); debug_assert_eq!("a".len(), 1, "tadam {}", true); - debug_assert!("a".is_empty(), "tadam {}", 1); - debug_assert!("a".is_empty(), "tadam {}", true); - debug_assert!("a".is_empty(), "tadam {}", true); + debug_assert!(!"a".is_empty(), "tadam {}", 1); + debug_assert!(!"a".is_empty(), "tadam {}", true); + debug_assert!(!"a".is_empty(), "tadam {}", true); debug_assert_eq!(a, true, "tadam {}", false); assert!(a!()); @@ -158,4 +158,14 @@ fn main() { }}; } in_macro!(a); + + assert!("".is_empty()); + assert!("".is_empty()); + assert!(!"requires negation".is_empty()); + assert!(!"requires negation".is_empty()); + + debug_assert!("".is_empty()); + debug_assert!("".is_empty()); + debug_assert!(!"requires negation".is_empty()); + debug_assert!(!"requires negation".is_empty()); } diff --git a/src/tools/clippy/tests/ui/bool_assert_comparison.rs b/src/tools/clippy/tests/ui/bool_assert_comparison.rs index 88e7560b4f9..0a8ad34fda5 100644 --- a/src/tools/clippy/tests/ui/bool_assert_comparison.rs +++ b/src/tools/clippy/tests/ui/bool_assert_comparison.rs @@ -158,4 +158,14 @@ fn main() { }}; } in_macro!(a); + + assert_eq!("".is_empty(), true); + assert_ne!("".is_empty(), false); + assert_ne!("requires negation".is_empty(), true); + assert_eq!("requires negation".is_empty(), false); + + debug_assert_eq!("".is_empty(), true); + debug_assert_ne!("".is_empty(), false); + debug_assert_ne!("requires negation".is_empty(), true); + debug_assert_eq!("requires negation".is_empty(), false); } diff --git a/src/tools/clippy/tests/ui/bool_assert_comparison.stderr b/src/tools/clippy/tests/ui/bool_assert_comparison.stderr index 3d9f8573e61..89cefc95a9f 100644 --- a/src/tools/clippy/tests/ui/bool_assert_comparison.stderr +++ b/src/tools/clippy/tests/ui/bool_assert_comparison.stderr @@ -8,7 +8,7 @@ LL | assert_eq!("a".is_empty(), false); help: replace it with `assert!(..)` | LL - assert_eq!("a".is_empty(), false); -LL + assert!("a".is_empty()); +LL + assert!(!"a".is_empty()); | error: used `assert_eq!` with a literal bool @@ -68,7 +68,7 @@ LL | assert_ne!("".is_empty(), true); help: replace it with `assert!(..)` | LL - assert_ne!("".is_empty(), true); -LL + assert!("".is_empty()); +LL + assert!(!"".is_empty()); | error: used `assert_ne!` with a literal bool @@ -80,7 +80,7 @@ LL | assert_ne!(true, "".is_empty()); help: replace it with `assert!(..)` | LL - assert_ne!(true, "".is_empty()); -LL + assert!("".is_empty()); +LL + assert!(!"".is_empty()); | error: used `assert_ne!` with a literal bool @@ -92,7 +92,7 @@ LL | assert_ne!(b, true); help: replace it with `assert!(..)` | LL - assert_ne!(b, true); -LL + assert!(b); +LL + assert!(!b); | error: used `debug_assert_eq!` with a literal bool @@ -104,7 +104,7 @@ LL | debug_assert_eq!("a".is_empty(), false); help: replace it with `debug_assert!(..)` | LL - debug_assert_eq!("a".is_empty(), false); -LL + debug_assert!("a".is_empty()); +LL + debug_assert!(!"a".is_empty()); | error: used `debug_assert_eq!` with a literal bool @@ -164,7 +164,7 @@ LL | debug_assert_ne!("".is_empty(), true); help: replace it with `debug_assert!(..)` | LL - debug_assert_ne!("".is_empty(), true); -LL + debug_assert!("".is_empty()); +LL + debug_assert!(!"".is_empty()); | error: used `debug_assert_ne!` with a literal bool @@ -176,7 +176,7 @@ LL | debug_assert_ne!(true, "".is_empty()); help: replace it with `debug_assert!(..)` | LL - debug_assert_ne!(true, "".is_empty()); -LL + debug_assert!("".is_empty()); +LL + debug_assert!(!"".is_empty()); | error: used `debug_assert_ne!` with a literal bool @@ -188,7 +188,7 @@ LL | debug_assert_ne!(b, true); help: replace it with `debug_assert!(..)` | LL - debug_assert_ne!(b, true); -LL + debug_assert!(b); +LL + debug_assert!(!b); | error: used `assert_eq!` with a literal bool @@ -200,7 +200,7 @@ LL | assert_eq!("a".is_empty(), false, "tadam {}", 1); help: replace it with `assert!(..)` | LL - assert_eq!("a".is_empty(), false, "tadam {}", 1); -LL + assert!("a".is_empty(), "tadam {}", 1); +LL + assert!(!"a".is_empty(), "tadam {}", 1); | error: used `assert_eq!` with a literal bool @@ -212,7 +212,7 @@ LL | assert_eq!("a".is_empty(), false, "tadam {}", true); help: replace it with `assert!(..)` | LL - assert_eq!("a".is_empty(), false, "tadam {}", true); -LL + assert!("a".is_empty(), "tadam {}", true); +LL + assert!(!"a".is_empty(), "tadam {}", true); | error: used `assert_eq!` with a literal bool @@ -224,7 +224,7 @@ LL | assert_eq!(false, "a".is_empty(), "tadam {}", true); help: replace it with `assert!(..)` | LL - assert_eq!(false, "a".is_empty(), "tadam {}", true); -LL + assert!("a".is_empty(), "tadam {}", true); +LL + assert!(!"a".is_empty(), "tadam {}", true); | error: used `debug_assert_eq!` with a literal bool @@ -236,7 +236,7 @@ LL | debug_assert_eq!("a".is_empty(), false, "tadam {}", 1); help: replace it with `debug_assert!(..)` | LL - debug_assert_eq!("a".is_empty(), false, "tadam {}", 1); -LL + debug_assert!("a".is_empty(), "tadam {}", 1); +LL + debug_assert!(!"a".is_empty(), "tadam {}", 1); | error: used `debug_assert_eq!` with a literal bool @@ -248,7 +248,7 @@ LL | debug_assert_eq!("a".is_empty(), false, "tadam {}", true); help: replace it with `debug_assert!(..)` | LL - debug_assert_eq!("a".is_empty(), false, "tadam {}", true); -LL + debug_assert!("a".is_empty(), "tadam {}", true); +LL + debug_assert!(!"a".is_empty(), "tadam {}", true); | error: used `debug_assert_eq!` with a literal bool @@ -260,7 +260,7 @@ LL | debug_assert_eq!(false, "a".is_empty(), "tadam {}", true); help: replace it with `debug_assert!(..)` | LL - debug_assert_eq!(false, "a".is_empty(), "tadam {}", true); -LL + debug_assert!("a".is_empty(), "tadam {}", true); +LL + debug_assert!(!"a".is_empty(), "tadam {}", true); | error: used `assert_eq!` with a literal bool @@ -299,5 +299,101 @@ LL - renamed!(b, true); LL + debug_assert!(b); | -error: aborting due to 25 previous errors +error: used `assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:162:5 + | +LL | assert_eq!("".is_empty(), true); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!("".is_empty(), true); +LL + assert!("".is_empty()); + | + +error: used `assert_ne!` with a literal bool + --> $DIR/bool_assert_comparison.rs:163:5 + | +LL | assert_ne!("".is_empty(), false); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_ne!("".is_empty(), false); +LL + assert!("".is_empty()); + | + +error: used `assert_ne!` with a literal bool + --> $DIR/bool_assert_comparison.rs:164:5 + | +LL | assert_ne!("requires negation".is_empty(), true); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_ne!("requires negation".is_empty(), true); +LL + assert!(!"requires negation".is_empty()); + | + +error: used `assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:165:5 + | +LL | assert_eq!("requires negation".is_empty(), false); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `assert!(..)` + | +LL - assert_eq!("requires negation".is_empty(), false); +LL + assert!(!"requires negation".is_empty()); + | + +error: used `debug_assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:167:5 + | +LL | debug_assert_eq!("".is_empty(), true); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!("".is_empty(), true); +LL + debug_assert!("".is_empty()); + | + +error: used `debug_assert_ne!` with a literal bool + --> $DIR/bool_assert_comparison.rs:168:5 + | +LL | debug_assert_ne!("".is_empty(), false); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_ne!("".is_empty(), false); +LL + debug_assert!("".is_empty()); + | + +error: used `debug_assert_ne!` with a literal bool + --> $DIR/bool_assert_comparison.rs:169:5 + | +LL | debug_assert_ne!("requires negation".is_empty(), true); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_ne!("requires negation".is_empty(), true); +LL + debug_assert!(!"requires negation".is_empty()); + | + +error: used `debug_assert_eq!` with a literal bool + --> $DIR/bool_assert_comparison.rs:170:5 + | +LL | debug_assert_eq!("requires negation".is_empty(), false); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: replace it with `debug_assert!(..)` + | +LL - debug_assert_eq!("requires negation".is_empty(), false); +LL + debug_assert!(!"requires negation".is_empty()); + | + +error: aborting due to 33 previous errors diff --git a/src/tools/clippy/tests/ui/crashes/ice-2774.stderr b/src/tools/clippy/tests/ui/crashes/ice-2774.stderr index 1f26c7f4db6..c5ea0b16d1b 100644 --- a/src/tools/clippy/tests/ui/crashes/ice-2774.stderr +++ b/src/tools/clippy/tests/ui/crashes/ice-2774.stderr @@ -5,6 +5,11 @@ LL | pub fn add_barfoos_to_foos<'a>(bars: &HashSet<&'a Bar>) { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: `-D clippy::needless-lifetimes` implied by `-D warnings` +help: elide the lifetimes + | +LL - pub fn add_barfoos_to_foos<'a>(bars: &HashSet<&'a Bar>) { +LL + pub fn add_barfoos_to_foos(bars: &HashSet<&Bar>) { + | error: aborting due to previous error diff --git a/src/tools/clippy/tests/ui/crashes/needless_lifetimes_impl_trait.stderr b/src/tools/clippy/tests/ui/crashes/needless_lifetimes_impl_trait.stderr index 875d5ab4f21..0b0e0ad2684 100644 --- a/src/tools/clippy/tests/ui/crashes/needless_lifetimes_impl_trait.stderr +++ b/src/tools/clippy/tests/ui/crashes/needless_lifetimes_impl_trait.stderr @@ -9,6 +9,11 @@ note: the lint level is defined here | LL | #![deny(clippy::needless_lifetimes)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ +help: elide the lifetimes + | +LL - fn baz<'a>(&'a self) -> impl Foo + 'a { +LL + fn baz(&self) -> impl Foo + '_ { + | error: aborting due to previous error diff --git a/src/tools/clippy/tests/ui/extra_unused_type_parameters.rs b/src/tools/clippy/tests/ui/extra_unused_type_parameters.rs new file mode 100644 index 00000000000..5cb80cb6233 --- /dev/null +++ b/src/tools/clippy/tests/ui/extra_unused_type_parameters.rs @@ -0,0 +1,69 @@ +#![allow(unused, clippy::needless_lifetimes)] +#![warn(clippy::extra_unused_type_parameters)] + +fn unused_ty<T>(x: u8) {} + +fn unused_multi<T, U>(x: u8) {} + +fn unused_with_lt<'a, T>(x: &'a u8) {} + +fn used_ty<T>(x: T, y: u8) {} + +fn used_ref<'a, T>(x: &'a T) {} + +fn used_ret<T: Default>(x: u8) -> T { + T::default() +} + +fn unused_bounded<T: Default, U>(x: U) {} + +fn unused_where_clause<T, U>(x: U) +where + T: Default, +{ +} + +fn some_unused<A, B, C, D: Iterator<Item = (B, C)>, E>(b: B, c: C) {} + +fn used_opaque<A>(iter: impl Iterator<Item = A>) -> usize { + iter.count() +} + +fn used_ret_opaque<A>() -> impl Iterator<Item = A> { + std::iter::empty() +} + +fn used_vec_box<T>(x: Vec<Box<T>>) {} + +fn used_body<T: Default + ToString>() -> String { + T::default().to_string() +} + +fn used_closure<T: Default + ToString>() -> impl Fn() { + || println!("{}", T::default().to_string()) +} + +struct S; + +impl S { + fn unused_ty_impl<T>(&self) {} +} + +// Don't lint on trait methods +trait Foo { + fn bar<T>(&self); +} + +impl Foo for S { + fn bar<T>(&self) {} +} + +fn skip_index<A, Iter>(iter: Iter, index: usize) -> impl Iterator<Item = A> +where + Iter: Iterator<Item = A>, +{ + iter.enumerate() + .filter_map(move |(i, a)| if i == index { None } else { Some(a) }) +} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/extra_unused_type_parameters.stderr b/src/tools/clippy/tests/ui/extra_unused_type_parameters.stderr new file mode 100644 index 00000000000..1c8dd53e638 --- /dev/null +++ b/src/tools/clippy/tests/ui/extra_unused_type_parameters.stderr @@ -0,0 +1,59 @@ +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:4:13 + | +LL | fn unused_ty<T>(x: u8) {} + | ^^^ + | + = help: consider removing the parameter + = note: `-D clippy::extra-unused-type-parameters` implied by `-D warnings` + +error: type parameters go unused in function definition + --> $DIR/extra_unused_type_parameters.rs:6:16 + | +LL | fn unused_multi<T, U>(x: u8) {} + | ^^^^^^ + | + = help: consider removing the parameters + +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:8:23 + | +LL | fn unused_with_lt<'a, T>(x: &'a u8) {} + | ^ + | + = help: consider removing the parameter + +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:18:19 + | +LL | fn unused_bounded<T: Default, U>(x: U) {} + | ^^^^^^^^^^^ + | + = help: consider removing the parameter + +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:20:24 + | +LL | fn unused_where_clause<T, U>(x: U) + | ^^ + | + = help: consider removing the parameter + +error: type parameters go unused in function definition + --> $DIR/extra_unused_type_parameters.rs:26:16 + | +LL | fn some_unused<A, B, C, D: Iterator<Item = (B, C)>, E>(b: B, c: C) {} + | ^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^ + | + = help: consider removing the parameters + +error: type parameter goes unused in function definition + --> $DIR/extra_unused_type_parameters.rs:49:22 + | +LL | fn unused_ty_impl<T>(&self) {} + | ^^^ + | + = help: consider removing the parameter + +error: aborting due to 7 previous errors + diff --git a/src/tools/clippy/tests/ui/len_without_is_empty.rs b/src/tools/clippy/tests/ui/len_without_is_empty.rs index 78397c2af34..b5dec6c46bd 100644 --- a/src/tools/clippy/tests/ui/len_without_is_empty.rs +++ b/src/tools/clippy/tests/ui/len_without_is_empty.rs @@ -282,4 +282,50 @@ impl AsyncLen { } } +// issue #9520 +pub struct NonStandardLenAndIsEmptySignature; +impl NonStandardLenAndIsEmptySignature { + // don't lint + pub fn len(&self, something: usize) -> usize { + something + } + + pub fn is_empty(&self, something: usize) -> bool { + something == 0 + } +} + +// test case for #9520 with generics in the function signature +pub trait TestResource { + type NonStandardSignatureWithGenerics: Copy; + fn lookup_content(&self, item: Self::NonStandardSignatureWithGenerics) -> Result<Option<&[u8]>, String>; +} +pub struct NonStandardSignatureWithGenerics(u32); +impl NonStandardSignatureWithGenerics { + pub fn is_empty<T, U>(self, resource: &T) -> bool + where + T: TestResource<NonStandardSignatureWithGenerics = U>, + U: Copy + From<NonStandardSignatureWithGenerics>, + { + if let Ok(Some(content)) = resource.lookup_content(self.into()) { + content.is_empty() + } else { + true + } + } + + // test case for #9520 with generics in the function signature + pub fn len<T, U>(self, resource: &T) -> usize + where + T: TestResource<NonStandardSignatureWithGenerics = U>, + U: Copy + From<NonStandardSignatureWithGenerics>, + { + if let Ok(Some(content)) = resource.lookup_content(self.into()) { + content.len() + } else { + 0_usize + } + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/manual_assert.edition2018.fixed b/src/tools/clippy/tests/ui/manual_assert.edition2018.fixed index 638320dd6ee..8c7e919bf62 100644 --- a/src/tools/clippy/tests/ui/manual_assert.edition2018.fixed +++ b/src/tools/clippy/tests/ui/manual_assert.edition2018.fixed @@ -29,9 +29,7 @@ fn main() { panic!("qaqaq{:?}", a); } assert!(a.is_empty(), "qaqaq{:?}", a); - if !a.is_empty() { - panic!("qwqwq"); - } + assert!(a.is_empty(), "qwqwq"); if a.len() == 3 { println!("qwq"); println!("qwq"); @@ -46,21 +44,11 @@ fn main() { println!("qwq"); } let b = vec![1, 2, 3]; - if b.is_empty() { - panic!("panic1"); - } - if b.is_empty() && a.is_empty() { - panic!("panic2"); - } - if a.is_empty() && !b.is_empty() { - panic!("panic3"); - } - if b.is_empty() || a.is_empty() { - panic!("panic4"); - } - if a.is_empty() || !b.is_empty() { - panic!("panic5"); - } + assert!(!b.is_empty(), "panic1"); + assert!(!(b.is_empty() && a.is_empty()), "panic2"); + assert!(!(a.is_empty() && !b.is_empty()), "panic3"); + assert!(!(b.is_empty() || a.is_empty()), "panic4"); + assert!(!(a.is_empty() || !b.is_empty()), "panic5"); assert!(!a.is_empty(), "with expansion {}", one!()); if a.is_empty() { let _ = 0; @@ -71,12 +59,11 @@ fn main() { fn issue7730(a: u8) { // Suggestion should preserve comment - if a > 2 { - // comment - /* this is a + // comment +/* this is a multiline comment */ - /// Doc comment - panic!("panic with comment") // comment after `panic!` - } +/// Doc comment +// comment after `panic!` +assert!(!(a > 2), "panic with comment"); } diff --git a/src/tools/clippy/tests/ui/manual_assert.edition2018.stderr b/src/tools/clippy/tests/ui/manual_assert.edition2018.stderr index 1f2e1e3087b..3555ac29243 100644 --- a/src/tools/clippy/tests/ui/manual_assert.edition2018.stderr +++ b/src/tools/clippy/tests/ui/manual_assert.edition2018.stderr @@ -9,6 +9,54 @@ LL | | } = note: `-D clippy::manual-assert` implied by `-D warnings` error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:34:5 + | +LL | / if !a.is_empty() { +LL | | panic!("qwqwq"); +LL | | } + | |_____^ help: try instead: `assert!(a.is_empty(), "qwqwq");` + +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:51:5 + | +LL | / if b.is_empty() { +LL | | panic!("panic1"); +LL | | } + | |_____^ help: try instead: `assert!(!b.is_empty(), "panic1");` + +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:54:5 + | +LL | / if b.is_empty() && a.is_empty() { +LL | | panic!("panic2"); +LL | | } + | |_____^ help: try instead: `assert!(!(b.is_empty() && a.is_empty()), "panic2");` + +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:57:5 + | +LL | / if a.is_empty() && !b.is_empty() { +LL | | panic!("panic3"); +LL | | } + | |_____^ help: try instead: `assert!(!(a.is_empty() && !b.is_empty()), "panic3");` + +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:60:5 + | +LL | / if b.is_empty() || a.is_empty() { +LL | | panic!("panic4"); +LL | | } + | |_____^ help: try instead: `assert!(!(b.is_empty() || a.is_empty()), "panic4");` + +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:63:5 + | +LL | / if a.is_empty() || !b.is_empty() { +LL | | panic!("panic5"); +LL | | } + | |_____^ help: try instead: `assert!(!(a.is_empty() || !b.is_empty()), "panic5");` + +error: only a `panic!` in `if`-then statement --> $DIR/manual_assert.rs:66:5 | LL | / if a.is_empty() { @@ -16,5 +64,22 @@ LL | | panic!("with expansion {}", one!()) LL | | } | |_____^ help: try instead: `assert!(!a.is_empty(), "with expansion {}", one!());` -error: aborting due to 2 previous errors +error: only a `panic!` in `if`-then statement + --> $DIR/manual_assert.rs:78:5 + | +LL | / if a > 2 { +LL | | // comment +LL | | /* this is a +LL | | multiline +... | +LL | | panic!("panic with comment") // comment after `panic!` +LL | | } + | |_____^ + | +help: try instead + | +LL | assert!(!(a > 2), "panic with comment"); + | + +error: aborting due to 9 previous errors diff --git a/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.fixed b/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.fixed index fc252cdd352..9fd3739b69c 100644 --- a/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.fixed +++ b/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.fixed @@ -123,7 +123,7 @@ fn main() { Enum::A => (), Enum::B => (), Enum::C => (), - _ => (), + Enum::__Private => (), } match Enum::A { Enum::A => (), diff --git a/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.stderr b/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.stderr index 6fa313dc911..105b4c4b41d 100644 --- a/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.stderr +++ b/src/tools/clippy/tests/ui/match_wildcard_for_single_variants.stderr @@ -49,10 +49,16 @@ LL | _ => (), | ^ help: try this: `Color::Blue` error: wildcard matches only a single variant and will also match any future added variants + --> $DIR/match_wildcard_for_single_variants.rs:126:13 + | +LL | _ => (), + | ^ help: try this: `Enum::__Private` + +error: wildcard matches only a single variant and will also match any future added variants --> $DIR/match_wildcard_for_single_variants.rs:153:13 | LL | _ => 2, | ^ help: try this: `Foo::B` -error: aborting due to 9 previous errors +error: aborting due to 10 previous errors diff --git a/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.rs b/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.rs index 41263535df6..4511bc99c3c 100644 --- a/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.rs +++ b/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.rs @@ -1,9 +1,13 @@ +// aux-build:macro_rules.rs #![allow(unused)] #![allow(deref_nullptr)] #![allow(clippy::unnecessary_operation)] #![allow(clippy::drop_copy)] #![warn(clippy::multiple_unsafe_ops_per_block)] +#[macro_use] +extern crate macro_rules; + use core::arch::asm; fn raw_ptr() -> *const () { @@ -107,4 +111,9 @@ unsafe fn read_char_good(ptr: *const u8) -> char { unsafe { core::char::from_u32_unchecked(int_value) } } +// no lint +fn issue10259() { + unsafe_macro!(); +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.stderr b/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.stderr index f6b8341795d..303aeb7aee0 100644 --- a/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.stderr +++ b/src/tools/clippy/tests/ui/multiple_unsafe_ops_per_block.stderr @@ -1,5 +1,5 @@ error: this `unsafe` block contains 2 unsafe operations, expected only one - --> $DIR/multiple_unsafe_ops_per_block.rs:32:5 + --> $DIR/multiple_unsafe_ops_per_block.rs:36:5 | LL | / unsafe { LL | | STATIC += 1; @@ -8,19 +8,19 @@ LL | | } | |_____^ | note: modification of a mutable static occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:33:9 + --> $DIR/multiple_unsafe_ops_per_block.rs:37:9 | LL | STATIC += 1; | ^^^^^^^^^^^ note: unsafe function call occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:34:9 + --> $DIR/multiple_unsafe_ops_per_block.rs:38:9 | LL | not_very_safe(); | ^^^^^^^^^^^^^^^ = note: `-D clippy::multiple-unsafe-ops-per-block` implied by `-D warnings` error: this `unsafe` block contains 2 unsafe operations, expected only one - --> $DIR/multiple_unsafe_ops_per_block.rs:41:5 + --> $DIR/multiple_unsafe_ops_per_block.rs:45:5 | LL | / unsafe { LL | | drop(u.u); @@ -29,18 +29,18 @@ LL | | } | |_____^ | note: union field access occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:42:14 + --> $DIR/multiple_unsafe_ops_per_block.rs:46:14 | LL | drop(u.u); | ^^^ note: raw pointer dereference occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:43:9 + --> $DIR/multiple_unsafe_ops_per_block.rs:47:9 | LL | *raw_ptr(); | ^^^^^^^^^^ error: this `unsafe` block contains 3 unsafe operations, expected only one - --> $DIR/multiple_unsafe_ops_per_block.rs:48:5 + --> $DIR/multiple_unsafe_ops_per_block.rs:52:5 | LL | / unsafe { LL | | asm!("nop"); @@ -50,23 +50,23 @@ LL | | } | |_____^ | note: inline assembly used here - --> $DIR/multiple_unsafe_ops_per_block.rs:49:9 + --> $DIR/multiple_unsafe_ops_per_block.rs:53:9 | LL | asm!("nop"); | ^^^^^^^^^^^ note: unsafe method call occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:50:9 + --> $DIR/multiple_unsafe_ops_per_block.rs:54:9 | LL | sample.not_very_safe(); | ^^^^^^^^^^^^^^^^^^^^^^ note: modification of a mutable static occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:51:9 + --> $DIR/multiple_unsafe_ops_per_block.rs:55:9 | LL | STATIC = 0; | ^^^^^^^^^^ error: this `unsafe` block contains 6 unsafe operations, expected only one - --> $DIR/multiple_unsafe_ops_per_block.rs:57:5 + --> $DIR/multiple_unsafe_ops_per_block.rs:61:5 | LL | / unsafe { LL | | drop(u.u); @@ -78,49 +78,49 @@ LL | | } | |_____^ | note: union field access occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:58:14 + --> $DIR/multiple_unsafe_ops_per_block.rs:62:14 | LL | drop(u.u); | ^^^ note: access of a mutable static occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:59:14 + --> $DIR/multiple_unsafe_ops_per_block.rs:63:14 | LL | drop(STATIC); | ^^^^^^ note: unsafe method call occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:60:9 + --> $DIR/multiple_unsafe_ops_per_block.rs:64:9 | LL | sample.not_very_safe(); | ^^^^^^^^^^^^^^^^^^^^^^ note: unsafe function call occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:61:9 + --> $DIR/multiple_unsafe_ops_per_block.rs:65:9 | LL | not_very_safe(); | ^^^^^^^^^^^^^^^ note: raw pointer dereference occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:62:9 + --> $DIR/multiple_unsafe_ops_per_block.rs:66:9 | LL | *raw_ptr(); | ^^^^^^^^^^ note: inline assembly used here - --> $DIR/multiple_unsafe_ops_per_block.rs:63:9 + --> $DIR/multiple_unsafe_ops_per_block.rs:67:9 | LL | asm!("nop"); | ^^^^^^^^^^^ error: this `unsafe` block contains 2 unsafe operations, expected only one - --> $DIR/multiple_unsafe_ops_per_block.rs:101:5 + --> $DIR/multiple_unsafe_ops_per_block.rs:105:5 | LL | unsafe { char::from_u32_unchecked(*ptr.cast::<u32>()) } | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | note: unsafe function call occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:101:14 + --> $DIR/multiple_unsafe_ops_per_block.rs:105:14 | LL | unsafe { char::from_u32_unchecked(*ptr.cast::<u32>()) } | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ note: raw pointer dereference occurs here - --> $DIR/multiple_unsafe_ops_per_block.rs:101:39 + --> $DIR/multiple_unsafe_ops_per_block.rs:105:39 | LL | unsafe { char::from_u32_unchecked(*ptr.cast::<u32>()) } | ^^^^^^^^^^^^^^^^^^ diff --git a/src/tools/clippy/tests/ui/needless_lifetimes.fixed b/src/tools/clippy/tests/ui/needless_lifetimes.fixed new file mode 100644 index 00000000000..d286ef4ba37 --- /dev/null +++ b/src/tools/clippy/tests/ui/needless_lifetimes.fixed @@ -0,0 +1,538 @@ +// run-rustfix +// aux-build:macro_rules.rs + +#![warn(clippy::needless_lifetimes)] +#![allow( + unused, + clippy::boxed_local, + clippy::extra_unused_type_parameters, + clippy::needless_pass_by_value, + clippy::unnecessary_wraps, + dyn_drop, + clippy::get_first +)] + +#[macro_use] +extern crate macro_rules; + +fn distinct_lifetimes(_x: &u8, _y: &u8, _z: u8) {} + +fn distinct_and_static(_x: &u8, _y: &u8, _z: &'static u8) {} + +// No error; same lifetime on two params. +fn same_lifetime_on_input<'a>(_x: &'a u8, _y: &'a u8) {} + +// No error; static involved. +fn only_static_on_input(_x: &u8, _y: &u8, _z: &'static u8) {} + +fn mut_and_static_input(_x: &mut u8, _y: &'static str) {} + +fn in_and_out(x: &u8, _y: u8) -> &u8 { + x +} + +// No error; multiple input refs. +fn multiple_in_and_out_1<'a>(x: &'a u8, _y: &'a u8) -> &'a u8 { + x +} + +// Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: +// fn multiple_in_and_out_2a<'a>(x: &'a u8, _y: &u8) -> &'a u8 +// ^^^ +fn multiple_in_and_out_2a<'a>(x: &'a u8, _y: &u8) -> &'a u8 { + x +} + +// Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: +// fn multiple_in_and_out_2b<'b>(_x: &u8, y: &'b u8) -> &'b u8 +// ^^^ +fn multiple_in_and_out_2b<'b>(_x: &u8, y: &'b u8) -> &'b u8 { + y +} + +// No error; multiple input refs +async fn func<'a>(args: &[&'a str]) -> Option<&'a str> { + args.get(0).cloned() +} + +// No error; static involved. +fn in_static_and_out<'a>(x: &'a u8, _y: &'static u8) -> &'a u8 { + x +} + +// Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: +// fn deep_reference_1a<'a>(x: &'a u8, _y: &u8) -> Result<&'a u8, ()> +// ^^^ +fn deep_reference_1a<'a>(x: &'a u8, _y: &u8) -> Result<&'a u8, ()> { + Ok(x) +} + +// Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: +// fn deep_reference_1b<'b>(_x: &u8, y: &'b u8) -> Result<&'b u8, ()> +// ^^^ +fn deep_reference_1b<'b>(_x: &u8, y: &'b u8) -> Result<&'b u8, ()> { + Ok(y) +} + +// No error; two input refs. +fn deep_reference_2<'a>(x: Result<&'a u8, &'a u8>) -> &'a u8 { + x.unwrap() +} + +fn deep_reference_3(x: &u8, _y: u8) -> Result<&u8, ()> { + Ok(x) +} + +// Where-clause, but without lifetimes. +fn where_clause_without_lt<T>(x: &u8, _y: u8) -> Result<&u8, ()> +where + T: Copy, +{ + Ok(x) +} + +type Ref<'r> = &'r u8; + +// No error; same lifetime on two params. +fn lifetime_param_1<'a>(_x: Ref<'a>, _y: &'a u8) {} + +fn lifetime_param_2(_x: Ref<'_>, _y: &u8) {} + +// No error; bounded lifetime. +fn lifetime_param_3<'a, 'b: 'a>(_x: Ref<'a>, _y: &'b u8) {} + +// No error; bounded lifetime. +fn lifetime_param_4<'a, 'b>(_x: Ref<'a>, _y: &'b u8) +where + 'b: 'a, +{ +} + +struct Lt<'a, I: 'static> { + x: &'a I, +} + +// No error; fn bound references `'a`. +fn fn_bound<'a, F, I>(_m: Lt<'a, I>, _f: F) -> Lt<'a, I> +where + F: Fn(Lt<'a, I>) -> Lt<'a, I>, +{ + unreachable!() +} + +fn fn_bound_2<F, I>(_m: Lt<'_, I>, _f: F) -> Lt<'_, I> +where + for<'x> F: Fn(Lt<'x, I>) -> Lt<'x, I>, +{ + unreachable!() +} + +// No error; see below. +fn fn_bound_3<'a, F: FnOnce(&'a i32)>(x: &'a i32, f: F) { + f(x); +} + +fn fn_bound_3_cannot_elide() { + let x = 42; + let p = &x; + let mut q = &x; + // This will fail if we elide lifetimes of `fn_bound_3`. + fn_bound_3(p, |y| q = y); +} + +// No error; multiple input refs. +fn fn_bound_4<'a, F: FnOnce() -> &'a ()>(cond: bool, x: &'a (), f: F) -> &'a () { + if cond { x } else { f() } +} + +struct X { + x: u8, +} + +impl X { + fn self_and_out(&self) -> &u8 { + &self.x + } + + // Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: + // fn self_and_in_out_1<'s>(&'s self, _x: &u8) -> &'s u8 + // ^^^ + fn self_and_in_out_1<'s>(&'s self, _x: &u8) -> &'s u8 { + &self.x + } + + // Error; multiple input refs, but the output lifetime is not elided, i.e., the following is valid: + // fn self_and_in_out_2<'t>(&self, x: &'t u8) -> &'t u8 + // ^^^^^ + fn self_and_in_out_2<'t>(&self, x: &'t u8) -> &'t u8 { + x + } + + fn distinct_self_and_in(&self, _x: &u8) {} + + // No error; same lifetimes on two params. + fn self_and_same_in<'s>(&'s self, _x: &'s u8) {} +} + +struct Foo<'a>(&'a u8); + +impl<'a> Foo<'a> { + // No error; lifetime `'a` not defined in method. + fn self_shared_lifetime(&self, _: &'a u8) {} + // No error; bounds exist. + fn self_bound_lifetime<'b: 'a>(&self, _: &'b u8) {} +} + +fn already_elided<'a>(_: &u8, _: &'a u8) -> &'a u8 { + unimplemented!() +} + +fn struct_with_lt(_foo: Foo<'_>) -> &str { + unimplemented!() +} + +// No warning; two input lifetimes (named on the reference, anonymous on `Foo`). +fn struct_with_lt2<'a>(_foo: &'a Foo) -> &'a str { + unimplemented!() +} + +// No warning; two input lifetimes (anonymous on the reference, named on `Foo`). +fn struct_with_lt3<'a>(_foo: &Foo<'a>) -> &'a str { + unimplemented!() +} + +// Warning; two input lifetimes, but the output lifetime is not elided, i.e., the following is +// valid: +// fn struct_with_lt4a<'a>(_foo: &'a Foo<'_>) -> &'a str +// ^^ +fn struct_with_lt4a<'a>(_foo: &'a Foo<'_>) -> &'a str { + unimplemented!() +} + +// Warning; two input lifetimes, but the output lifetime is not elided, i.e., the following is +// valid: +// fn struct_with_lt4b<'b>(_foo: &Foo<'b>) -> &'b str +// ^^^^ +fn struct_with_lt4b<'b>(_foo: &Foo<'b>) -> &'b str { + unimplemented!() +} + +trait WithLifetime<'a> {} + +type WithLifetimeAlias<'a> = dyn WithLifetime<'a>; + +// Should not warn because it won't build without the lifetime. +fn trait_obj_elided<'a>(_arg: &'a dyn WithLifetime) -> &'a str { + unimplemented!() +} + +// Should warn because there is no lifetime on `Drop`, so this would be +// unambiguous if we elided the lifetime. +fn trait_obj_elided2(_arg: &dyn Drop) -> &str { + unimplemented!() +} + +type FooAlias<'a> = Foo<'a>; + +fn alias_with_lt(_foo: FooAlias<'_>) -> &str { + unimplemented!() +} + +// No warning; two input lifetimes (named on the reference, anonymous on `FooAlias`). +fn alias_with_lt2<'a>(_foo: &'a FooAlias) -> &'a str { + unimplemented!() +} + +// No warning; two input lifetimes (anonymous on the reference, named on `FooAlias`). +fn alias_with_lt3<'a>(_foo: &FooAlias<'a>) -> &'a str { + unimplemented!() +} + +// Warning; two input lifetimes, but the output lifetime is not elided, i.e., the following is +// valid: +// fn alias_with_lt4a<'a>(_foo: &'a FooAlias<'_>) -> &'a str +// ^^ +fn alias_with_lt4a<'a>(_foo: &'a FooAlias<'_>) -> &'a str { + unimplemented!() +} + +// Warning; two input lifetimes, but the output lifetime is not elided, i.e., the following is +// valid: +// fn alias_with_lt4b<'b>(_foo: &FooAlias<'b>) -> &'b str +// ^^^^^^^^^ +fn alias_with_lt4b<'b>(_foo: &FooAlias<'b>) -> &'b str { + unimplemented!() +} + +fn named_input_elided_output(_arg: &str) -> &str { + unimplemented!() +} + +fn elided_input_named_output<'a>(_arg: &str) -> &'a str { + unimplemented!() +} + +fn trait_bound_ok<T: WithLifetime<'static>>(_: &u8, _: T) { + unimplemented!() +} +fn trait_bound<'a, T: WithLifetime<'a>>(_: &'a u8, _: T) { + unimplemented!() +} + +// Don't warn on these; see issue #292. +fn trait_bound_bug<'a, T: WithLifetime<'a>>() { + unimplemented!() +} + +// See issue #740. +struct Test { + vec: Vec<usize>, +} + +impl Test { + fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = usize> + 'a> { + unimplemented!() + } +} + +trait LintContext<'a> {} + +fn f<'a, T: LintContext<'a>>(_: &T) {} + +fn test<'a>(x: &'a [u8]) -> u8 { + let y: &'a u8 = &x[5]; + *y +} + +// Issue #3284: give hint regarding lifetime in return type. +struct Cow<'a> { + x: &'a str, +} +fn out_return_type_lts(e: &str) -> Cow<'_> { + unimplemented!() +} + +// Make sure we still warn on implementations +mod issue4291 { + trait BadTrait { + fn needless_lt(x: &u8) {} + } + + impl BadTrait for () { + fn needless_lt(_x: &u8) {} + } +} + +mod issue2944 { + trait Foo {} + struct Bar; + struct Baz<'a> { + bar: &'a Bar, + } + + impl<'a> Foo for Baz<'a> {} + impl Bar { + fn baz(&self) -> impl Foo + '_ { + Baz { bar: self } + } + } +} + +mod nested_elision_sites { + // issue #issue2944 + + // closure trait bounds subject to nested elision + // don't lint because they refer to outer lifetimes + fn trait_fn<'a>(i: &'a i32) -> impl Fn() -> &'a i32 { + move || i + } + fn trait_fn_mut<'a>(i: &'a i32) -> impl FnMut() -> &'a i32 { + move || i + } + fn trait_fn_once<'a>(i: &'a i32) -> impl FnOnce() -> &'a i32 { + move || i + } + + // don't lint + fn impl_trait_in_input_position<'a>(f: impl Fn() -> &'a i32) -> &'a i32 { + f() + } + fn impl_trait_in_output_position<'a>(i: &'a i32) -> impl Fn() -> &'a i32 { + move || i + } + // lint + fn impl_trait_elidable_nested_named_lifetimes<'a>(i: &'a i32, f: impl for<'b> Fn(&'b i32) -> &'b i32) -> &'a i32 { + f(i) + } + fn impl_trait_elidable_nested_anonymous_lifetimes(i: &i32, f: impl Fn(&i32) -> &i32) -> &i32 { + f(i) + } + + // don't lint + fn generics_not_elidable<'a, T: Fn() -> &'a i32>(f: T) -> &'a i32 { + f() + } + // lint + fn generics_elidable<T: Fn(&i32) -> &i32>(i: &i32, f: T) -> &i32 { + f(i) + } + + // don't lint + fn where_clause_not_elidable<'a, T>(f: T) -> &'a i32 + where + T: Fn() -> &'a i32, + { + f() + } + // lint + fn where_clause_elidadable<T>(i: &i32, f: T) -> &i32 + where + T: Fn(&i32) -> &i32, + { + f(i) + } + + // don't lint + fn pointer_fn_in_input_position<'a>(f: fn(&'a i32) -> &'a i32, i: &'a i32) -> &'a i32 { + f(i) + } + fn pointer_fn_in_output_position<'a>(_: &'a i32) -> fn(&'a i32) -> &'a i32 { + |i| i + } + // lint + fn pointer_fn_elidable(i: &i32, f: fn(&i32) -> &i32) -> &i32 { + f(i) + } + + // don't lint + fn nested_fn_pointer_1<'a>(_: &'a i32) -> fn(fn(&'a i32) -> &'a i32) -> i32 { + |f| 42 + } + fn nested_fn_pointer_2<'a>(_: &'a i32) -> impl Fn(fn(&'a i32)) { + |f| () + } + + // lint + fn nested_fn_pointer_3(_: &i32) -> fn(fn(&i32) -> &i32) -> i32 { + |f| 42 + } + fn nested_fn_pointer_4(_: &i32) -> impl Fn(fn(&i32)) { + |f| () + } +} + +mod issue6159 { + use std::ops::Deref; + pub fn apply_deref<'a, T, F, R>(x: &'a T, f: F) -> R + where + T: Deref, + F: FnOnce(&'a T::Target) -> R, + { + f(x.deref()) + } +} + +mod issue7296 { + use std::rc::Rc; + use std::sync::Arc; + + struct Foo; + impl Foo { + fn implicit(&self) -> &() { + &() + } + fn implicit_mut(&mut self) -> &() { + &() + } + + fn explicit<'a>(self: &'a Arc<Self>) -> &'a () { + &() + } + fn explicit_mut<'a>(self: &'a mut Rc<Self>) -> &'a () { + &() + } + + fn lifetime_elsewhere(self: Box<Self>, here: &()) -> &() { + &() + } + } + + trait Bar { + fn implicit(&self) -> &(); + fn implicit_provided(&self) -> &() { + &() + } + + fn explicit<'a>(self: &'a Arc<Self>) -> &'a (); + fn explicit_provided<'a>(self: &'a Arc<Self>) -> &'a () { + &() + } + + fn lifetime_elsewhere(self: Box<Self>, here: &()) -> &(); + fn lifetime_elsewhere_provided(self: Box<Self>, here: &()) -> &() { + &() + } + } +} + +mod pr_9743_false_negative_fix { + #![allow(unused)] + + fn foo(x: &u8, y: &'_ u8) {} + + fn bar(x: &u8, y: &'_ u8, z: &'_ u8) {} +} + +mod pr_9743_output_lifetime_checks { + #![allow(unused)] + + // lint: only one input + fn one_input(x: &u8) -> &u8 { + unimplemented!() + } + + // lint: multiple inputs, output would not be elided + fn multiple_inputs_output_not_elided<'b>(x: &u8, y: &'b u8, z: &'b u8) -> &'b u8 { + unimplemented!() + } + + // don't lint: multiple inputs, output would be elided (which would create an ambiguity) + fn multiple_inputs_output_would_be_elided<'a, 'b>(x: &'a u8, y: &'b u8, z: &'b u8) -> &'a u8 { + unimplemented!() + } +} + +mod in_macro { + macro_rules! local_one_input_macro { + () => { + fn one_input(x: &u8) -> &u8 { + unimplemented!() + } + }; + } + + // lint local macro expands to function with needless lifetimes + local_one_input_macro!(); + + // no lint on external macro + macro_rules::needless_lifetime!(); +} + +mod issue5787 { + use std::sync::MutexGuard; + + struct Foo; + + impl Foo { + // doesn't get linted without async + pub async fn wait<'a, T>(&self, guard: MutexGuard<'a, T>) -> MutexGuard<'a, T> { + guard + } + } + + async fn foo<'a>(_x: &i32, y: &'a str) -> &'a str { + y + } +} + +fn main() {} diff --git a/src/tools/clippy/tests/ui/needless_lifetimes.rs b/src/tools/clippy/tests/ui/needless_lifetimes.rs index 2efc936752e..409528b291d 100644 --- a/src/tools/clippy/tests/ui/needless_lifetimes.rs +++ b/src/tools/clippy/tests/ui/needless_lifetimes.rs @@ -1,13 +1,20 @@ +// run-rustfix +// aux-build:macro_rules.rs + #![warn(clippy::needless_lifetimes)] #![allow( - dead_code, + unused, clippy::boxed_local, + clippy::extra_unused_type_parameters, clippy::needless_pass_by_value, clippy::unnecessary_wraps, dyn_drop, clippy::get_first )] +#[macro_use] +extern crate macro_rules; + fn distinct_lifetimes<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: u8) {} fn distinct_and_static<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: &'static u8) {} @@ -495,4 +502,37 @@ mod pr_9743_output_lifetime_checks { } } +mod in_macro { + macro_rules! local_one_input_macro { + () => { + fn one_input<'a>(x: &'a u8) -> &'a u8 { + unimplemented!() + } + }; + } + + // lint local macro expands to function with needless lifetimes + local_one_input_macro!(); + + // no lint on external macro + macro_rules::needless_lifetime!(); +} + +mod issue5787 { + use std::sync::MutexGuard; + + struct Foo; + + impl Foo { + // doesn't get linted without async + pub async fn wait<'a, T>(&self, guard: MutexGuard<'a, T>) -> MutexGuard<'a, T> { + guard + } + } + + async fn foo<'a>(_x: &i32, y: &'a str) -> &'a str { + y + } +} + fn main() {} diff --git a/src/tools/clippy/tests/ui/needless_lifetimes.stderr b/src/tools/clippy/tests/ui/needless_lifetimes.stderr index 5a7cf13c86d..4e3c8f20d8c 100644 --- a/src/tools/clippy/tests/ui/needless_lifetimes.stderr +++ b/src/tools/clippy/tests/ui/needless_lifetimes.stderr @@ -1,316 +1,559 @@ error: the following explicit lifetimes could be elided: 'a, 'b - --> $DIR/needless_lifetimes.rs:11:1 + --> $DIR/needless_lifetimes.rs:18:1 | LL | fn distinct_lifetimes<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: `-D clippy::needless-lifetimes` implied by `-D warnings` +help: elide the lifetimes + | +LL - fn distinct_lifetimes<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: u8) {} +LL + fn distinct_lifetimes(_x: &u8, _y: &u8, _z: u8) {} + | error: the following explicit lifetimes could be elided: 'a, 'b - --> $DIR/needless_lifetimes.rs:13:1 + --> $DIR/needless_lifetimes.rs:20:1 | LL | fn distinct_and_static<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: &'static u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn distinct_and_static<'a, 'b>(_x: &'a u8, _y: &'b u8, _z: &'static u8) {} +LL + fn distinct_and_static(_x: &u8, _y: &u8, _z: &'static u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:23:1 + --> $DIR/needless_lifetimes.rs:30:1 | LL | fn in_and_out<'a>(x: &'a u8, _y: u8) -> &'a u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn in_and_out<'a>(x: &'a u8, _y: u8) -> &'a u8 { +LL + fn in_and_out(x: &u8, _y: u8) -> &u8 { + | error: the following explicit lifetimes could be elided: 'b - --> $DIR/needless_lifetimes.rs:35:1 + --> $DIR/needless_lifetimes.rs:42:1 | LL | fn multiple_in_and_out_2a<'a, 'b>(x: &'a u8, _y: &'b u8) -> &'a u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn multiple_in_and_out_2a<'a, 'b>(x: &'a u8, _y: &'b u8) -> &'a u8 { +LL + fn multiple_in_and_out_2a<'a>(x: &'a u8, _y: &u8) -> &'a u8 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:42:1 + --> $DIR/needless_lifetimes.rs:49:1 | LL | fn multiple_in_and_out_2b<'a, 'b>(_x: &'a u8, y: &'b u8) -> &'b u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn multiple_in_and_out_2b<'a, 'b>(_x: &'a u8, y: &'b u8) -> &'b u8 { +LL + fn multiple_in_and_out_2b<'b>(_x: &u8, y: &'b u8) -> &'b u8 { + | error: the following explicit lifetimes could be elided: 'b - --> $DIR/needless_lifetimes.rs:59:1 + --> $DIR/needless_lifetimes.rs:66:1 | LL | fn deep_reference_1a<'a, 'b>(x: &'a u8, _y: &'b u8) -> Result<&'a u8, ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn deep_reference_1a<'a, 'b>(x: &'a u8, _y: &'b u8) -> Result<&'a u8, ()> { +LL + fn deep_reference_1a<'a>(x: &'a u8, _y: &u8) -> Result<&'a u8, ()> { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:66:1 + --> $DIR/needless_lifetimes.rs:73:1 | LL | fn deep_reference_1b<'a, 'b>(_x: &'a u8, y: &'b u8) -> Result<&'b u8, ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn deep_reference_1b<'a, 'b>(_x: &'a u8, y: &'b u8) -> Result<&'b u8, ()> { +LL + fn deep_reference_1b<'b>(_x: &u8, y: &'b u8) -> Result<&'b u8, ()> { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:75:1 + --> $DIR/needless_lifetimes.rs:82:1 | LL | fn deep_reference_3<'a>(x: &'a u8, _y: u8) -> Result<&'a u8, ()> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn deep_reference_3<'a>(x: &'a u8, _y: u8) -> Result<&'a u8, ()> { +LL + fn deep_reference_3(x: &u8, _y: u8) -> Result<&u8, ()> { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:80:1 + --> $DIR/needless_lifetimes.rs:87:1 | LL | fn where_clause_without_lt<'a, T>(x: &'a u8, _y: u8) -> Result<&'a u8, ()> | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn where_clause_without_lt<'a, T>(x: &'a u8, _y: u8) -> Result<&'a u8, ()> +LL + fn where_clause_without_lt<T>(x: &u8, _y: u8) -> Result<&u8, ()> + | error: the following explicit lifetimes could be elided: 'a, 'b - --> $DIR/needless_lifetimes.rs:92:1 + --> $DIR/needless_lifetimes.rs:99:1 | LL | fn lifetime_param_2<'a, 'b>(_x: Ref<'a>, _y: &'b u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:92:37 +help: elide the lifetimes + | +LL - fn lifetime_param_2<'a, 'b>(_x: Ref<'a>, _y: &'b u8) {} +LL + fn lifetime_param_2(_x: Ref<'_>, _y: &u8) {} | -LL | fn lifetime_param_2<'a, 'b>(_x: Ref<'a>, _y: &'b u8) {} - | ^^ error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:116:1 + --> $DIR/needless_lifetimes.rs:123:1 | LL | fn fn_bound_2<'a, F, I>(_m: Lt<'a, I>, _f: F) -> Lt<'a, I> | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:116:32 +help: elide the lifetimes + | +LL - fn fn_bound_2<'a, F, I>(_m: Lt<'a, I>, _f: F) -> Lt<'a, I> +LL + fn fn_bound_2<F, I>(_m: Lt<'_, I>, _f: F) -> Lt<'_, I> | -LL | fn fn_bound_2<'a, F, I>(_m: Lt<'a, I>, _f: F) -> Lt<'a, I> - | ^^ error: the following explicit lifetimes could be elided: 's - --> $DIR/needless_lifetimes.rs:146:5 + --> $DIR/needless_lifetimes.rs:153:5 | LL | fn self_and_out<'s>(&'s self) -> &'s u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn self_and_out<'s>(&'s self) -> &'s u8 { +LL + fn self_and_out(&self) -> &u8 { + | error: the following explicit lifetimes could be elided: 't - --> $DIR/needless_lifetimes.rs:153:5 + --> $DIR/needless_lifetimes.rs:160:5 | LL | fn self_and_in_out_1<'s, 't>(&'s self, _x: &'t u8) -> &'s u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn self_and_in_out_1<'s, 't>(&'s self, _x: &'t u8) -> &'s u8 { +LL + fn self_and_in_out_1<'s>(&'s self, _x: &u8) -> &'s u8 { + | error: the following explicit lifetimes could be elided: 's - --> $DIR/needless_lifetimes.rs:160:5 + --> $DIR/needless_lifetimes.rs:167:5 | LL | fn self_and_in_out_2<'s, 't>(&'s self, x: &'t u8) -> &'t u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn self_and_in_out_2<'s, 't>(&'s self, x: &'t u8) -> &'t u8 { +LL + fn self_and_in_out_2<'t>(&self, x: &'t u8) -> &'t u8 { + | error: the following explicit lifetimes could be elided: 's, 't - --> $DIR/needless_lifetimes.rs:164:5 + --> $DIR/needless_lifetimes.rs:171:5 | LL | fn distinct_self_and_in<'s, 't>(&'s self, _x: &'t u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn distinct_self_and_in<'s, 't>(&'s self, _x: &'t u8) {} +LL + fn distinct_self_and_in(&self, _x: &u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:183:1 + --> $DIR/needless_lifetimes.rs:190:1 | LL | fn struct_with_lt<'a>(_foo: Foo<'a>) -> &'a str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:183:33 +help: elide the lifetimes + | +LL - fn struct_with_lt<'a>(_foo: Foo<'a>) -> &'a str { +LL + fn struct_with_lt(_foo: Foo<'_>) -> &str { | -LL | fn struct_with_lt<'a>(_foo: Foo<'a>) -> &'a str { - | ^^ error: the following explicit lifetimes could be elided: 'b - --> $DIR/needless_lifetimes.rs:201:1 + --> $DIR/needless_lifetimes.rs:208:1 | LL | fn struct_with_lt4a<'a, 'b>(_foo: &'a Foo<'b>) -> &'a str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:201:43 +help: elide the lifetimes + | +LL - fn struct_with_lt4a<'a, 'b>(_foo: &'a Foo<'b>) -> &'a str { +LL + fn struct_with_lt4a<'a>(_foo: &'a Foo<'_>) -> &'a str { | -LL | fn struct_with_lt4a<'a, 'b>(_foo: &'a Foo<'b>) -> &'a str { - | ^^ error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:209:1 + --> $DIR/needless_lifetimes.rs:216:1 | LL | fn struct_with_lt4b<'a, 'b>(_foo: &'a Foo<'b>) -> &'b str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn struct_with_lt4b<'a, 'b>(_foo: &'a Foo<'b>) -> &'b str { +LL + fn struct_with_lt4b<'b>(_foo: &Foo<'b>) -> &'b str { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:224:1 + --> $DIR/needless_lifetimes.rs:231:1 | LL | fn trait_obj_elided2<'a>(_arg: &'a dyn Drop) -> &'a str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn trait_obj_elided2<'a>(_arg: &'a dyn Drop) -> &'a str { +LL + fn trait_obj_elided2(_arg: &dyn Drop) -> &str { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:230:1 + --> $DIR/needless_lifetimes.rs:237:1 | LL | fn alias_with_lt<'a>(_foo: FooAlias<'a>) -> &'a str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:230:37 +help: elide the lifetimes + | +LL - fn alias_with_lt<'a>(_foo: FooAlias<'a>) -> &'a str { +LL + fn alias_with_lt(_foo: FooAlias<'_>) -> &str { | -LL | fn alias_with_lt<'a>(_foo: FooAlias<'a>) -> &'a str { - | ^^ error: the following explicit lifetimes could be elided: 'b - --> $DIR/needless_lifetimes.rs:248:1 + --> $DIR/needless_lifetimes.rs:255:1 | LL | fn alias_with_lt4a<'a, 'b>(_foo: &'a FooAlias<'b>) -> &'a str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:248:47 +help: elide the lifetimes + | +LL - fn alias_with_lt4a<'a, 'b>(_foo: &'a FooAlias<'b>) -> &'a str { +LL + fn alias_with_lt4a<'a>(_foo: &'a FooAlias<'_>) -> &'a str { | -LL | fn alias_with_lt4a<'a, 'b>(_foo: &'a FooAlias<'b>) -> &'a str { - | ^^ error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:256:1 + --> $DIR/needless_lifetimes.rs:263:1 | LL | fn alias_with_lt4b<'a, 'b>(_foo: &'a FooAlias<'b>) -> &'b str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn alias_with_lt4b<'a, 'b>(_foo: &'a FooAlias<'b>) -> &'b str { +LL + fn alias_with_lt4b<'b>(_foo: &FooAlias<'b>) -> &'b str { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:260:1 + --> $DIR/needless_lifetimes.rs:267:1 | LL | fn named_input_elided_output<'a>(_arg: &'a str) -> &str { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn named_input_elided_output<'a>(_arg: &'a str) -> &str { +LL + fn named_input_elided_output(_arg: &str) -> &str { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:268:1 + --> $DIR/needless_lifetimes.rs:275:1 | LL | fn trait_bound_ok<'a, T: WithLifetime<'static>>(_: &'a u8, _: T) { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn trait_bound_ok<'a, T: WithLifetime<'static>>(_: &'a u8, _: T) { +LL + fn trait_bound_ok<T: WithLifetime<'static>>(_: &u8, _: T) { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:304:1 + --> $DIR/needless_lifetimes.rs:311:1 | LL | fn out_return_type_lts<'a>(e: &'a str) -> Cow<'a> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -help: replace with `'_` in generic arguments such as here - --> $DIR/needless_lifetimes.rs:304:47 +help: elide the lifetimes + | +LL - fn out_return_type_lts<'a>(e: &'a str) -> Cow<'a> { +LL + fn out_return_type_lts(e: &str) -> Cow<'_> { | -LL | fn out_return_type_lts<'a>(e: &'a str) -> Cow<'a> { - | ^^ error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:311:9 + --> $DIR/needless_lifetimes.rs:318:9 | LL | fn needless_lt<'a>(x: &'a u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn needless_lt<'a>(x: &'a u8) {} +LL + fn needless_lt(x: &u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:315:9 + --> $DIR/needless_lifetimes.rs:322:9 | LL | fn needless_lt<'a>(_x: &'a u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn needless_lt<'a>(_x: &'a u8) {} +LL + fn needless_lt(_x: &u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:328:9 + --> $DIR/needless_lifetimes.rs:335:9 | LL | fn baz<'a>(&'a self) -> impl Foo + 'a { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn baz<'a>(&'a self) -> impl Foo + 'a { +LL + fn baz(&self) -> impl Foo + '_ { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:360:5 + --> $DIR/needless_lifetimes.rs:367:5 | LL | fn impl_trait_elidable_nested_anonymous_lifetimes<'a>(i: &'a i32, f: impl Fn(&i32) -> &i32) -> &'a i32 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn impl_trait_elidable_nested_anonymous_lifetimes<'a>(i: &'a i32, f: impl Fn(&i32) -> &i32) -> &'a i32 { +LL + fn impl_trait_elidable_nested_anonymous_lifetimes(i: &i32, f: impl Fn(&i32) -> &i32) -> &i32 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:369:5 + --> $DIR/needless_lifetimes.rs:376:5 | LL | fn generics_elidable<'a, T: Fn(&i32) -> &i32>(i: &'a i32, f: T) -> &'a i32 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn generics_elidable<'a, T: Fn(&i32) -> &i32>(i: &'a i32, f: T) -> &'a i32 { +LL + fn generics_elidable<T: Fn(&i32) -> &i32>(i: &i32, f: T) -> &i32 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:381:5 + --> $DIR/needless_lifetimes.rs:388:5 | LL | fn where_clause_elidadable<'a, T>(i: &'a i32, f: T) -> &'a i32 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn where_clause_elidadable<'a, T>(i: &'a i32, f: T) -> &'a i32 +LL + fn where_clause_elidadable<T>(i: &i32, f: T) -> &i32 + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:396:5 + --> $DIR/needless_lifetimes.rs:403:5 | LL | fn pointer_fn_elidable<'a>(i: &'a i32, f: fn(&i32) -> &i32) -> &'a i32 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn pointer_fn_elidable<'a>(i: &'a i32, f: fn(&i32) -> &i32) -> &'a i32 { +LL + fn pointer_fn_elidable(i: &i32, f: fn(&i32) -> &i32) -> &i32 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:409:5 + --> $DIR/needless_lifetimes.rs:416:5 | LL | fn nested_fn_pointer_3<'a>(_: &'a i32) -> fn(fn(&i32) -> &i32) -> i32 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn nested_fn_pointer_3<'a>(_: &'a i32) -> fn(fn(&i32) -> &i32) -> i32 { +LL + fn nested_fn_pointer_3(_: &i32) -> fn(fn(&i32) -> &i32) -> i32 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:412:5 + --> $DIR/needless_lifetimes.rs:419:5 | LL | fn nested_fn_pointer_4<'a>(_: &'a i32) -> impl Fn(fn(&i32)) { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn nested_fn_pointer_4<'a>(_: &'a i32) -> impl Fn(fn(&i32)) { +LL + fn nested_fn_pointer_4(_: &i32) -> impl Fn(fn(&i32)) { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:434:9 + --> $DIR/needless_lifetimes.rs:441:9 | LL | fn implicit<'a>(&'a self) -> &'a () { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn implicit<'a>(&'a self) -> &'a () { +LL + fn implicit(&self) -> &() { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:437:9 + --> $DIR/needless_lifetimes.rs:444:9 | LL | fn implicit_mut<'a>(&'a mut self) -> &'a () { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn implicit_mut<'a>(&'a mut self) -> &'a () { +LL + fn implicit_mut(&mut self) -> &() { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:448:9 + --> $DIR/needless_lifetimes.rs:455:9 | LL | fn lifetime_elsewhere<'a>(self: Box<Self>, here: &'a ()) -> &'a () { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn lifetime_elsewhere<'a>(self: Box<Self>, here: &'a ()) -> &'a () { +LL + fn lifetime_elsewhere(self: Box<Self>, here: &()) -> &() { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:454:9 + --> $DIR/needless_lifetimes.rs:461:9 | LL | fn implicit<'a>(&'a self) -> &'a (); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn implicit<'a>(&'a self) -> &'a (); +LL + fn implicit(&self) -> &(); + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:455:9 + --> $DIR/needless_lifetimes.rs:462:9 | LL | fn implicit_provided<'a>(&'a self) -> &'a () { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn implicit_provided<'a>(&'a self) -> &'a () { +LL + fn implicit_provided(&self) -> &() { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:464:9 + --> $DIR/needless_lifetimes.rs:471:9 | LL | fn lifetime_elsewhere<'a>(self: Box<Self>, here: &'a ()) -> &'a (); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn lifetime_elsewhere<'a>(self: Box<Self>, here: &'a ()) -> &'a (); +LL + fn lifetime_elsewhere(self: Box<Self>, here: &()) -> &(); + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:465:9 + --> $DIR/needless_lifetimes.rs:472:9 | LL | fn lifetime_elsewhere_provided<'a>(self: Box<Self>, here: &'a ()) -> &'a () { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn lifetime_elsewhere_provided<'a>(self: Box<Self>, here: &'a ()) -> &'a () { +LL + fn lifetime_elsewhere_provided(self: Box<Self>, here: &()) -> &() { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:474:5 + --> $DIR/needless_lifetimes.rs:481:5 | LL | fn foo<'a>(x: &'a u8, y: &'_ u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn foo<'a>(x: &'a u8, y: &'_ u8) {} +LL + fn foo(x: &u8, y: &'_ u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:476:5 + --> $DIR/needless_lifetimes.rs:483:5 | LL | fn bar<'a>(x: &'a u8, y: &'_ u8, z: &'_ u8) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn bar<'a>(x: &'a u8, y: &'_ u8, z: &'_ u8) {} +LL + fn bar(x: &u8, y: &'_ u8, z: &'_ u8) {} + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:483:5 + --> $DIR/needless_lifetimes.rs:490:5 | LL | fn one_input<'a>(x: &'a u8) -> &'a u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn one_input<'a>(x: &'a u8) -> &'a u8 { +LL + fn one_input(x: &u8) -> &u8 { + | error: the following explicit lifetimes could be elided: 'a - --> $DIR/needless_lifetimes.rs:488:5 + --> $DIR/needless_lifetimes.rs:495:5 | LL | fn multiple_inputs_output_not_elided<'a, 'b>(x: &'a u8, y: &'b u8, z: &'b u8) -> &'b u8 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: elide the lifetimes + | +LL - fn multiple_inputs_output_not_elided<'a, 'b>(x: &'a u8, y: &'b u8, z: &'b u8) -> &'b u8 { +LL + fn multiple_inputs_output_not_elided<'b>(x: &u8, y: &'b u8, z: &'b u8) -> &'b u8 { + | + +error: the following explicit lifetimes could be elided: 'a + --> $DIR/needless_lifetimes.rs:508:13 + | +LL | fn one_input<'a>(x: &'a u8) -> &'a u8 { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +... +LL | local_one_input_macro!(); + | ------------------------ in this macro invocation + | + = note: this error originates in the macro `local_one_input_macro` (in Nightly builds, run with -Z macro-backtrace for more info) +help: elide the lifetimes + | +LL - fn one_input<'a>(x: &'a u8) -> &'a u8 { +LL + fn one_input(x: &u8) -> &u8 { + | -error: aborting due to 45 previous errors +error: aborting due to 46 previous errors diff --git a/src/tools/clippy/tests/ui/needless_range_loop.stderr b/src/tools/clippy/tests/ui/needless_range_loop.stderr index b31544ec334..cffa19bec3a 100644 --- a/src/tools/clippy/tests/ui/needless_range_loop.stderr +++ b/src/tools/clippy/tests/ui/needless_range_loop.stderr @@ -49,7 +49,7 @@ error: the loop variable `i` is used to index `vec` LL | for i in 0..vec.len() { | ^^^^^^^^^^^^ | -help: consider using an iterator +help: consider using an iterator and enumerate() | LL | for (i, <item>) in vec.iter().enumerate() { | ~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~ @@ -126,7 +126,7 @@ error: the loop variable `i` is used to index `vec` LL | for i in 5..vec.len() { | ^^^^^^^^^^^^ | -help: consider using an iterator +help: consider using an iterator and enumerate() | LL | for (i, <item>) in vec.iter().enumerate().skip(5) { | ~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -137,7 +137,7 @@ error: the loop variable `i` is used to index `vec` LL | for i in 5..10 { | ^^^^^ | -help: consider using an iterator +help: consider using an iterator and enumerate() | LL | for (i, <item>) in vec.iter().enumerate().take(10).skip(5) { | ~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -148,7 +148,7 @@ error: the loop variable `i` is used to index `vec` LL | for i in 0..vec.len() { | ^^^^^^^^^^^^ | -help: consider using an iterator +help: consider using an iterator and enumerate() | LL | for (i, <item>) in vec.iter_mut().enumerate() { | ~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~ diff --git a/src/tools/clippy/tests/ui/new_without_default.rs b/src/tools/clippy/tests/ui/new_without_default.rs index 65809023f8d..7803418cb04 100644 --- a/src/tools/clippy/tests/ui/new_without_default.rs +++ b/src/tools/clippy/tests/ui/new_without_default.rs @@ -1,4 +1,9 @@ -#![allow(dead_code, clippy::missing_safety_doc, clippy::extra_unused_lifetimes)] +#![allow( + dead_code, + clippy::missing_safety_doc, + clippy::extra_unused_lifetimes, + clippy::extra_unused_type_parameters +)] #![warn(clippy::new_without_default)] pub struct Foo; diff --git a/src/tools/clippy/tests/ui/new_without_default.stderr b/src/tools/clippy/tests/ui/new_without_default.stderr index 212a69ab94e..583dd327d6a 100644 --- a/src/tools/clippy/tests/ui/new_without_default.stderr +++ b/src/tools/clippy/tests/ui/new_without_default.stderr @@ -1,5 +1,5 @@ error: you should consider adding a `Default` implementation for `Foo` - --> $DIR/new_without_default.rs:7:5 + --> $DIR/new_without_default.rs:12:5 | LL | / pub fn new() -> Foo { LL | | Foo @@ -17,7 +17,7 @@ LL + } | error: you should consider adding a `Default` implementation for `Bar` - --> $DIR/new_without_default.rs:15:5 + --> $DIR/new_without_default.rs:20:5 | LL | / pub fn new() -> Self { LL | | Bar @@ -34,7 +34,7 @@ LL + } | error: you should consider adding a `Default` implementation for `LtKo<'c>` - --> $DIR/new_without_default.rs:79:5 + --> $DIR/new_without_default.rs:84:5 | LL | / pub fn new() -> LtKo<'c> { LL | | unimplemented!() @@ -51,7 +51,7 @@ LL + } | error: you should consider adding a `Default` implementation for `NewNotEqualToDerive` - --> $DIR/new_without_default.rs:172:5 + --> $DIR/new_without_default.rs:177:5 | LL | / pub fn new() -> Self { LL | | NewNotEqualToDerive { foo: 1 } @@ -68,7 +68,7 @@ LL + } | error: you should consider adding a `Default` implementation for `FooGenerics<T>` - --> $DIR/new_without_default.rs:180:5 + --> $DIR/new_without_default.rs:185:5 | LL | / pub fn new() -> Self { LL | | Self(Default::default()) @@ -85,7 +85,7 @@ LL + } | error: you should consider adding a `Default` implementation for `BarGenerics<T>` - --> $DIR/new_without_default.rs:187:5 + --> $DIR/new_without_default.rs:192:5 | LL | / pub fn new() -> Self { LL | | Self(Default::default()) @@ -102,7 +102,7 @@ LL + } | error: you should consider adding a `Default` implementation for `Foo<T>` - --> $DIR/new_without_default.rs:198:9 + --> $DIR/new_without_default.rs:203:9 | LL | / pub fn new() -> Self { LL | | todo!() diff --git a/src/tools/clippy/tests/ui/redundant_field_names.fixed b/src/tools/clippy/tests/ui/redundant_field_names.fixed index ec7f8ae923a..276266a2dd8 100644 --- a/src/tools/clippy/tests/ui/redundant_field_names.fixed +++ b/src/tools/clippy/tests/ui/redundant_field_names.fixed @@ -1,7 +1,7 @@ // run-rustfix #![warn(clippy::redundant_field_names)] -#![allow(clippy::no_effect, dead_code, unused_variables)] +#![allow(clippy::extra_unused_type_parameters, clippy::no_effect, dead_code, unused_variables)] #[macro_use] extern crate derive_new; diff --git a/src/tools/clippy/tests/ui/redundant_field_names.rs b/src/tools/clippy/tests/ui/redundant_field_names.rs index 73122016cf6..f674141c138 100644 --- a/src/tools/clippy/tests/ui/redundant_field_names.rs +++ b/src/tools/clippy/tests/ui/redundant_field_names.rs @@ -1,7 +1,7 @@ // run-rustfix #![warn(clippy::redundant_field_names)] -#![allow(clippy::no_effect, dead_code, unused_variables)] +#![allow(clippy::extra_unused_type_parameters, clippy::no_effect, dead_code, unused_variables)] #[macro_use] extern crate derive_new; diff --git a/src/tools/clippy/tests/ui/regex.rs b/src/tools/clippy/tests/ui/regex.rs index f0e1a8128d7..ab8ac97a0e7 100644 --- a/src/tools/clippy/tests/ui/regex.rs +++ b/src/tools/clippy/tests/ui/regex.rs @@ -36,6 +36,10 @@ fn syntax_error() { let raw_string_error = Regex::new(r"[...\/...]"); let raw_string_error = Regex::new(r#"[...\/...]"#); + + let escaped_string_span = Regex::new("\\b\\c"); + + let aux_span = Regex::new("(?ixi)"); } fn trivial_regex() { diff --git a/src/tools/clippy/tests/ui/regex.stderr b/src/tools/clippy/tests/ui/regex.stderr index 2424644c6f6..c2440f39e0a 100644 --- a/src/tools/clippy/tests/ui/regex.stderr +++ b/src/tools/clippy/tests/ui/regex.stderr @@ -29,7 +29,10 @@ error: regex syntax error: invalid character class range, the start must be <= t LL | let some_unicode = Regex::new("[é-è]"); | ^^^ -error: regex syntax error on position 0: unclosed group +error: regex parse error: + ( + ^ + error: unclosed group --> $DIR/regex.rs:18:33 | LL | let some_regex = Regex::new(OPENING_PAREN); @@ -43,25 +46,37 @@ LL | let binary_pipe_in_wrong_position = BRegex::new("|"); | = help: the regex is unlikely to be useful as it is -error: regex syntax error on position 0: unclosed group +error: regex parse error: + ( + ^ + error: unclosed group --> $DIR/regex.rs:21:41 | LL | let some_binary_regex = BRegex::new(OPENING_PAREN); | ^^^^^^^^^^^^^ -error: regex syntax error on position 0: unclosed group +error: regex parse error: + ( + ^ + error: unclosed group --> $DIR/regex.rs:22:56 | LL | let some_binary_regex_builder = BRegexBuilder::new(OPENING_PAREN); | ^^^^^^^^^^^^^ -error: regex syntax error on position 0: unclosed group +error: regex parse error: + ( + ^ + error: unclosed group --> $DIR/regex.rs:34:37 | LL | let set_error = RegexSet::new(&[OPENING_PAREN, r"[a-z]+/.(com|org|net)"]); | ^^^^^^^^^^^^^ -error: regex syntax error on position 0: unclosed group +error: regex parse error: + ( + ^ + error: unclosed group --> $DIR/regex.rs:35:39 | LL | let bset_error = BRegexSet::new(&[OPENING_PAREN, r"[a-z]+/.(com|org|net)"]); @@ -79,8 +94,25 @@ error: regex syntax error: unrecognized escape sequence LL | let raw_string_error = Regex::new(r#"[...//...]"#); | ^^ +error: regex parse error: + /b/c + ^^ + error: unrecognized escape sequence + --> $DIR/regex.rs:40:42 + | +LL | let escaped_string_span = Regex::new("/b/c"); + | ^^^^^^^^ + | + = help: consider using a raw string literal: `r".."` + +error: regex syntax error: duplicate flag + --> $DIR/regex.rs:42:34 + | +LL | let aux_span = Regex::new("(?ixi)"); + | ^ ^ + error: trivial regex - --> $DIR/regex.rs:42:33 + --> $DIR/regex.rs:46:33 | LL | let trivial_eq = Regex::new("^foobar$"); | ^^^^^^^^^^ @@ -88,7 +120,7 @@ LL | let trivial_eq = Regex::new("^foobar$"); = help: consider using `==` on `str`s error: trivial regex - --> $DIR/regex.rs:44:48 + --> $DIR/regex.rs:48:48 | LL | let trivial_eq_builder = RegexBuilder::new("^foobar$"); | ^^^^^^^^^^ @@ -96,7 +128,7 @@ LL | let trivial_eq_builder = RegexBuilder::new("^foobar$"); = help: consider using `==` on `str`s error: trivial regex - --> $DIR/regex.rs:46:42 + --> $DIR/regex.rs:50:42 | LL | let trivial_starts_with = Regex::new("^foobar"); | ^^^^^^^^^ @@ -104,7 +136,7 @@ LL | let trivial_starts_with = Regex::new("^foobar"); = help: consider using `str::starts_with` error: trivial regex - --> $DIR/regex.rs:48:40 + --> $DIR/regex.rs:52:40 | LL | let trivial_ends_with = Regex::new("foobar$"); | ^^^^^^^^^ @@ -112,7 +144,7 @@ LL | let trivial_ends_with = Regex::new("foobar$"); = help: consider using `str::ends_with` error: trivial regex - --> $DIR/regex.rs:50:39 + --> $DIR/regex.rs:54:39 | LL | let trivial_contains = Regex::new("foobar"); | ^^^^^^^^ @@ -120,7 +152,7 @@ LL | let trivial_contains = Regex::new("foobar"); = help: consider using `str::contains` error: trivial regex - --> $DIR/regex.rs:52:39 + --> $DIR/regex.rs:56:39 | LL | let trivial_contains = Regex::new(NOT_A_REAL_REGEX); | ^^^^^^^^^^^^^^^^ @@ -128,7 +160,7 @@ LL | let trivial_contains = Regex::new(NOT_A_REAL_REGEX); = help: consider using `str::contains` error: trivial regex - --> $DIR/regex.rs:54:40 + --> $DIR/regex.rs:58:40 | LL | let trivial_backslash = Regex::new("a/.b"); | ^^^^^^^ @@ -136,7 +168,7 @@ LL | let trivial_backslash = Regex::new("a/.b"); = help: consider using `str::contains` error: trivial regex - --> $DIR/regex.rs:57:36 + --> $DIR/regex.rs:61:36 | LL | let trivial_empty = Regex::new(""); | ^^ @@ -144,7 +176,7 @@ LL | let trivial_empty = Regex::new(""); = help: the regex is unlikely to be useful as it is error: trivial regex - --> $DIR/regex.rs:59:36 + --> $DIR/regex.rs:63:36 | LL | let trivial_empty = Regex::new("^"); | ^^^ @@ -152,7 +184,7 @@ LL | let trivial_empty = Regex::new("^"); = help: the regex is unlikely to be useful as it is error: trivial regex - --> $DIR/regex.rs:61:36 + --> $DIR/regex.rs:65:36 | LL | let trivial_empty = Regex::new("^$"); | ^^^^ @@ -160,12 +192,12 @@ LL | let trivial_empty = Regex::new("^$"); = help: consider using `str::is_empty` error: trivial regex - --> $DIR/regex.rs:63:44 + --> $DIR/regex.rs:67:44 | LL | let binary_trivial_empty = BRegex::new("^$"); | ^^^^ | = help: consider using `str::is_empty` -error: aborting due to 23 previous errors +error: aborting due to 25 previous errors diff --git a/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.fixed b/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.fixed index 713cff604a1..dc24d447c60 100644 --- a/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.fixed +++ b/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.fixed @@ -26,7 +26,7 @@ fn seek_to_start_false_method(t: &mut StructWithSeekMethod) { // This should NOT trigger clippy warning because // StructWithSeekMethod does not implement std::io::Seek; -fn seek_to_start_method_owned_false<T>(mut t: StructWithSeekMethod) { +fn seek_to_start_method_owned_false(mut t: StructWithSeekMethod) { t.seek(SeekFrom::Start(0)); } @@ -38,7 +38,7 @@ fn seek_to_start_false_trait(t: &mut StructWithSeekTrait) { // This should NOT trigger clippy warning because // StructWithSeekMethod does not implement std::io::Seek; -fn seek_to_start_false_trait_owned<T>(mut t: StructWithSeekTrait) { +fn seek_to_start_false_trait_owned(mut t: StructWithSeekTrait) { t.seek(SeekFrom::Start(0)); } diff --git a/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.rs b/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.rs index 467003a1a66..4adde2c4018 100644 --- a/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.rs +++ b/src/tools/clippy/tests/ui/seek_to_start_instead_of_rewind.rs @@ -26,7 +26,7 @@ fn seek_to_start_false_method(t: &mut StructWithSeekMethod) { // This should NOT trigger clippy warning because // StructWithSeekMethod does not implement std::io::Seek; -fn seek_to_start_method_owned_false<T>(mut t: StructWithSeekMethod) { +fn seek_to_start_method_owned_false(mut t: StructWithSeekMethod) { t.seek(SeekFrom::Start(0)); } @@ -38,7 +38,7 @@ fn seek_to_start_false_trait(t: &mut StructWithSeekTrait) { // This should NOT trigger clippy warning because // StructWithSeekMethod does not implement std::io::Seek; -fn seek_to_start_false_trait_owned<T>(mut t: StructWithSeekTrait) { +fn seek_to_start_false_trait_owned(mut t: StructWithSeekTrait) { t.seek(SeekFrom::Start(0)); } diff --git a/src/tools/clippy/tests/ui/suspicious_to_owned.stderr b/src/tools/clippy/tests/ui/suspicious_to_owned.stderr index dec3f50d6f1..c4ec7aa88a2 100644 --- a/src/tools/clippy/tests/ui/suspicious_to_owned.stderr +++ b/src/tools/clippy/tests/ui/suspicious_to_owned.stderr @@ -2,27 +2,62 @@ error: this `to_owned` call clones the Cow<'_, str> itself and does not cause th --> $DIR/suspicious_to_owned.rs:16:13 | LL | let _ = cow.to_owned(); - | ^^^^^^^^^^^^^^ help: consider using, depending on intent: `cow.clone()` or `cow.into_owned()` + | ^^^^^^^^^^^^^^ | = note: `-D clippy::suspicious-to-owned` implied by `-D warnings` +help: depending on intent, either make the Cow an Owned variant + | +LL | let _ = cow.into_owned(); + | ~~~~~~~~~~~~~~~~ +help: or clone the Cow itself + | +LL | let _ = cow.clone(); + | ~~~~~~~~~~~ error: this `to_owned` call clones the Cow<'_, [char; 3]> itself and does not cause the Cow<'_, [char; 3]> contents to become owned --> $DIR/suspicious_to_owned.rs:26:13 | LL | let _ = cow.to_owned(); - | ^^^^^^^^^^^^^^ help: consider using, depending on intent: `cow.clone()` or `cow.into_owned()` + | ^^^^^^^^^^^^^^ + | +help: depending on intent, either make the Cow an Owned variant + | +LL | let _ = cow.into_owned(); + | ~~~~~~~~~~~~~~~~ +help: or clone the Cow itself + | +LL | let _ = cow.clone(); + | ~~~~~~~~~~~ error: this `to_owned` call clones the Cow<'_, Vec<char>> itself and does not cause the Cow<'_, Vec<char>> contents to become owned --> $DIR/suspicious_to_owned.rs:36:13 | LL | let _ = cow.to_owned(); - | ^^^^^^^^^^^^^^ help: consider using, depending on intent: `cow.clone()` or `cow.into_owned()` + | ^^^^^^^^^^^^^^ + | +help: depending on intent, either make the Cow an Owned variant + | +LL | let _ = cow.into_owned(); + | ~~~~~~~~~~~~~~~~ +help: or clone the Cow itself + | +LL | let _ = cow.clone(); + | ~~~~~~~~~~~ error: this `to_owned` call clones the Cow<'_, str> itself and does not cause the Cow<'_, str> contents to become owned --> $DIR/suspicious_to_owned.rs:46:13 | LL | let _ = cow.to_owned(); - | ^^^^^^^^^^^^^^ help: consider using, depending on intent: `cow.clone()` or `cow.into_owned()` + | ^^^^^^^^^^^^^^ + | +help: depending on intent, either make the Cow an Owned variant + | +LL | let _ = cow.into_owned(); + | ~~~~~~~~~~~~~~~~ +help: or clone the Cow itself + | +LL | let _ = cow.clone(); + | ~~~~~~~~~~~ error: implicitly cloning a `String` by calling `to_owned` on its dereferenced type --> $DIR/suspicious_to_owned.rs:60:13 diff --git a/src/tools/clippy/tests/ui/type_repetition_in_bounds.rs b/src/tools/clippy/tests/ui/type_repetition_in_bounds.rs index 2eca1f4701c..8b4613b3f6e 100644 --- a/src/tools/clippy/tests/ui/type_repetition_in_bounds.rs +++ b/src/tools/clippy/tests/ui/type_repetition_in_bounds.rs @@ -1,4 +1,5 @@ #![deny(clippy::type_repetition_in_bounds)] +#![allow(clippy::extra_unused_type_parameters)] use std::ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Sub, SubAssign}; diff --git a/src/tools/clippy/tests/ui/type_repetition_in_bounds.stderr b/src/tools/clippy/tests/ui/type_repetition_in_bounds.stderr index 70d700c1cc4..a90df03c04f 100644 --- a/src/tools/clippy/tests/ui/type_repetition_in_bounds.stderr +++ b/src/tools/clippy/tests/ui/type_repetition_in_bounds.stderr @@ -1,5 +1,5 @@ error: this type has already been used as a bound predicate - --> $DIR/type_repetition_in_bounds.rs:8:5 + --> $DIR/type_repetition_in_bounds.rs:9:5 | LL | T: Clone, | ^^^^^^^^ @@ -12,7 +12,7 @@ LL | #![deny(clippy::type_repetition_in_bounds)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: this type has already been used as a bound predicate - --> $DIR/type_repetition_in_bounds.rs:25:5 + --> $DIR/type_repetition_in_bounds.rs:26:5 | LL | Self: Copy + Default + Ord, | ^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -20,7 +20,7 @@ LL | Self: Copy + Default + Ord, = help: consider combining the bounds: `Self: Clone + Copy + Default + Ord` error: this type has already been used as a bound predicate - --> $DIR/type_repetition_in_bounds.rs:85:5 + --> $DIR/type_repetition_in_bounds.rs:86:5 | LL | T: Clone, | ^^^^^^^^ @@ -28,7 +28,7 @@ LL | T: Clone, = help: consider combining the bounds: `T: ?Sized + Clone` error: this type has already been used as a bound predicate - --> $DIR/type_repetition_in_bounds.rs:90:5 + --> $DIR/type_repetition_in_bounds.rs:91:5 | LL | T: ?Sized, | ^^^^^^^^^ diff --git a/src/tools/clippy/tests/ui/unused_io_amount.rs b/src/tools/clippy/tests/ui/unused_io_amount.rs index 4b059558173..8d3e094b759 100644 --- a/src/tools/clippy/tests/ui/unused_io_amount.rs +++ b/src/tools/clippy/tests/ui/unused_io_amount.rs @@ -63,6 +63,14 @@ fn combine_or(file: &str) -> Result<(), Error> { Ok(()) } +fn is_ok_err<T: io::Read + io::Write>(s: &mut T) { + s.write(b"ok").is_ok(); + s.write(b"err").is_err(); + let mut buf = [0u8; 0]; + s.read(&mut buf).is_ok(); + s.read(&mut buf).is_err(); +} + async fn bad_async_write<W: AsyncWrite + Unpin>(w: &mut W) { w.write(b"hello world").await.unwrap(); } diff --git a/src/tools/clippy/tests/ui/unused_io_amount.stderr b/src/tools/clippy/tests/ui/unused_io_amount.stderr index 7ba7e09c0f0..0865c5213f6 100644 --- a/src/tools/clippy/tests/ui/unused_io_amount.stderr +++ b/src/tools/clippy/tests/ui/unused_io_amount.stderr @@ -82,13 +82,45 @@ LL | | .expect("error"); error: written amount is not handled --> $DIR/unused_io_amount.rs:67:5 | +LL | s.write(b"ok").is_ok(); + | ^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Write::write_all` instead, or handle partial writes + +error: written amount is not handled + --> $DIR/unused_io_amount.rs:68:5 + | +LL | s.write(b"err").is_err(); + | ^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Write::write_all` instead, or handle partial writes + +error: read amount is not handled + --> $DIR/unused_io_amount.rs:70:5 + | +LL | s.read(&mut buf).is_ok(); + | ^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Read::read_exact` instead, or handle partial reads + +error: read amount is not handled + --> $DIR/unused_io_amount.rs:71:5 + | +LL | s.read(&mut buf).is_err(); + | ^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = help: use `Read::read_exact` instead, or handle partial reads + +error: written amount is not handled + --> $DIR/unused_io_amount.rs:75:5 + | LL | w.write(b"hello world").await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: use `AsyncWriteExt::write_all` instead, or handle partial writes error: read amount is not handled - --> $DIR/unused_io_amount.rs:72:5 + --> $DIR/unused_io_amount.rs:80:5 | LL | r.read(&mut buf[..]).await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -96,7 +128,7 @@ LL | r.read(&mut buf[..]).await.unwrap(); = help: use `AsyncReadExt::read_exact` instead, or handle partial reads error: written amount is not handled - --> $DIR/unused_io_amount.rs:85:9 + --> $DIR/unused_io_amount.rs:93:9 | LL | w.write(b"hello world").await?; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -104,7 +136,7 @@ LL | w.write(b"hello world").await?; = help: use `AsyncWriteExt::write_all` instead, or handle partial writes error: read amount is not handled - --> $DIR/unused_io_amount.rs:93:9 + --> $DIR/unused_io_amount.rs:101:9 | LL | r.read(&mut buf[..]).await.or(Err(Error::Kind))?; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -112,7 +144,7 @@ LL | r.read(&mut buf[..]).await.or(Err(Error::Kind))?; = help: use `AsyncReadExt::read_exact` instead, or handle partial reads error: written amount is not handled - --> $DIR/unused_io_amount.rs:101:5 + --> $DIR/unused_io_amount.rs:109:5 | LL | w.write(b"hello world").await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -120,12 +152,12 @@ LL | w.write(b"hello world").await.unwrap(); = help: use `AsyncWriteExt::write_all` instead, or handle partial writes error: read amount is not handled - --> $DIR/unused_io_amount.rs:106:5 + --> $DIR/unused_io_amount.rs:114:5 | LL | r.read(&mut buf[..]).await.unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: use `AsyncReadExt::read_exact` instead, or handle partial reads -error: aborting due to 16 previous errors +error: aborting due to 20 previous errors diff --git a/src/tools/clippy/tests/ui/wildcard_enum_match_arm.fixed b/src/tools/clippy/tests/ui/wildcard_enum_match_arm.fixed index 23607497841..293bf75a717 100644 --- a/src/tools/clippy/tests/ui/wildcard_enum_match_arm.fixed +++ b/src/tools/clippy/tests/ui/wildcard_enum_match_arm.fixed @@ -96,7 +96,7 @@ fn main() { } match Enum::A { Enum::A => (), - Enum::B | _ => (), + Enum::B | Enum::__Private => (), } } } diff --git a/src/tools/clippy/tests/ui/wildcard_enum_match_arm.stderr b/src/tools/clippy/tests/ui/wildcard_enum_match_arm.stderr index efecc9576cc..30d29aa4e77 100644 --- a/src/tools/clippy/tests/ui/wildcard_enum_match_arm.stderr +++ b/src/tools/clippy/tests/ui/wildcard_enum_match_arm.stderr @@ -34,11 +34,11 @@ error: wildcard matches known variants and will also match future added variants LL | _ => {}, | ^ help: try this: `ErrorKind::PermissionDenied | _` -error: wildcard matches known variants and will also match future added variants +error: wildcard match will also match any future added variants --> $DIR/wildcard_enum_match_arm.rs:99:13 | LL | _ => (), - | ^ help: try this: `Enum::B | _` + | ^ help: try this: `Enum::B | Enum::__Private` error: aborting due to 6 previous errors |