[use_self]: Make it aware of lifetimes
Have the lint trigger even if `Self` has generic lifetime parameters.
```rs
impl<'a> Foo<'a> {
type Item = Foo<'a>; // Can be replaced with Self
fn new() -> Self {
Foo { // No lifetime, but they are inferred to be that of Self
// Can be replaced as well
...
}
}
// Don't replace `Foo<'b>`, the lifetime is different!
fn eq<'b>(self, other: Foo<'b>) -> bool {
..
}
```
Fixes #12381
This commit is contained in:
Ethiraric
parent
93f0a9a91f
commit
f3879b3630
4 changed files with 122 additions and 57 deletions
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@ -6,7 +6,8 @@
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clippy::should_implement_trait,
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clippy::upper_case_acronyms,
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clippy::from_over_into,
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clippy::self_named_constructors
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clippy::self_named_constructors,
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clippy::needless_lifetimes
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)]
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#[macro_use]
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@ -53,6 +54,7 @@ mod better {
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}
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mod lifetimes {
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#[derive(Clone, Copy)]
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struct Foo<'a> {
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foo_str: &'a str,
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}
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@ -68,11 +70,19 @@ mod lifetimes {
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Foo { foo_str: "foo" }
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}
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// FIXME: the lint does not handle lifetimed struct
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// `Self` should be applicable here
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fn clone(&self) -> Foo<'a> {
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fn clone(&self) -> Self {
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Foo { foo_str: self.foo_str }
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}
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// Cannot replace with `Self` because the lifetime is not `'a`.
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fn eq<'b>(&self, other: Foo<'b>) -> bool {
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let x: Foo<'_> = other;
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self.foo_str == other.foo_str
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}
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fn f(&self) -> Foo<'_> {
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*self
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}
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}
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}
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@ -6,7 +6,8 @@
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clippy::should_implement_trait,
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clippy::upper_case_acronyms,
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clippy::from_over_into,
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clippy::self_named_constructors
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clippy::self_named_constructors,
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clippy::needless_lifetimes
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)]
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#[macro_use]
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@ -53,6 +54,7 @@ mod better {
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}
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mod lifetimes {
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#[derive(Clone, Copy)]
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struct Foo<'a> {
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foo_str: &'a str,
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}
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@ -68,11 +70,19 @@ mod lifetimes {
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Foo { foo_str: "foo" }
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}
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// FIXME: the lint does not handle lifetimed struct
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// `Self` should be applicable here
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fn clone(&self) -> Foo<'a> {
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Foo { foo_str: self.foo_str }
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}
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// Cannot replace with `Self` because the lifetime is not `'a`.
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fn eq<'b>(&self, other: Foo<'b>) -> bool {
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let x: Foo<'_> = other;
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self.foo_str == other.foo_str
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}
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fn f(&self) -> Foo<'_> {
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*self
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}
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}
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}
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@ -1,5 +1,5 @@
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:21:21
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--> tests/ui/use_self.rs:22:21
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LL | fn new() -> Foo {
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| ^^^ help: use the applicable keyword: `Self`
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@ -8,250 +8,256 @@ LL | fn new() -> Foo {
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= help: to override `-D warnings` add `#[allow(clippy::use_self)]`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:22:13
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--> tests/ui/use_self.rs:23:13
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LL | Foo {}
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| ^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:24:22
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--> tests/ui/use_self.rs:25:22
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LL | fn test() -> Foo {
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| ^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:25:13
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--> tests/ui/use_self.rs:26:13
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LL | Foo::new()
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| ^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:30:25
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--> tests/ui/use_self.rs:31:25
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LL | fn default() -> Foo {
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| ^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:31:13
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--> tests/ui/use_self.rs:32:13
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LL | Foo::new()
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| ^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:96:24
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--> tests/ui/use_self.rs:73:28
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LL | fn clone(&self) -> Foo<'a> {
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| ^^^^^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:106:24
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LL | fn bad(foos: &[Foo]) -> impl Iterator<Item = &Foo> {
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| ^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:96:55
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--> tests/ui/use_self.rs:106:55
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LL | fn bad(foos: &[Foo]) -> impl Iterator<Item = &Foo> {
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| ^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:111:13
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--> tests/ui/use_self.rs:121:13
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LL | TS(0)
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:146:29
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--> tests/ui/use_self.rs:156:29
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LL | fn bar() -> Bar {
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:147:21
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--> tests/ui/use_self.rs:157:21
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LL | Bar { foo: Foo {} }
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:158:21
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--> tests/ui/use_self.rs:168:21
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LL | fn baz() -> Foo {
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:159:13
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--> tests/ui/use_self.rs:169:13
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LL | Foo {}
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:176:21
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--> tests/ui/use_self.rs:186:21
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LL | let _ = Enum::B(42);
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:177:21
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--> tests/ui/use_self.rs:187:21
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LL | let _ = Enum::C { field: true };
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:178:21
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--> tests/ui/use_self.rs:188:21
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LL | let _ = Enum::A;
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:220:13
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--> tests/ui/use_self.rs:230:13
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LL | nested::A::fun_1();
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:221:13
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--> tests/ui/use_self.rs:231:13
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LL | nested::A::A;
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:223:13
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--> tests/ui/use_self.rs:233:13
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LL | nested::A {};
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:242:13
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--> tests/ui/use_self.rs:252:13
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LL | TestStruct::from_something()
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| ^^^^^^^^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:256:25
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--> tests/ui/use_self.rs:266:25
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LL | async fn g() -> S {
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| ^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:257:13
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--> tests/ui/use_self.rs:267:13
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LL | S {}
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:261:16
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--> tests/ui/use_self.rs:271:16
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LL | &p[S::A..S::B]
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:261:22
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--> tests/ui/use_self.rs:271:22
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LL | &p[S::A..S::B]
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:284:29
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--> tests/ui/use_self.rs:294:29
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LL | fn foo(value: T) -> Foo<T> {
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:285:13
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--> tests/ui/use_self.rs:295:13
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LL | Foo::<T> { value }
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:457:13
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--> tests/ui/use_self.rs:467:13
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LL | A::new::<submod::B>(submod::B {})
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| ^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:494:13
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--> tests/ui/use_self.rs:504:13
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LL | S2::new()
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:531:17
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--> tests/ui/use_self.rs:541:17
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LL | Foo::Bar => unimplemented!(),
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:532:17
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--> tests/ui/use_self.rs:542:17
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LL | Foo::Baz => unimplemented!(),
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:538:20
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--> tests/ui/use_self.rs:548:20
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LL | if let Foo::Bar = self {
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:562:17
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--> tests/ui/use_self.rs:572:17
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LL | Something::Num(n) => *n,
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:563:17
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--> tests/ui/use_self.rs:573:17
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LL | Something::TupleNums(n, _m) => *n,
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:564:17
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--> tests/ui/use_self.rs:574:17
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LL | Something::StructNums { one, two: _ } => *one,
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| ^^^^^^^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:570:17
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--> tests/ui/use_self.rs:580:17
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LL | crate::issue8845::Something::Num(n) => *n,
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:571:17
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--> tests/ui/use_self.rs:581:17
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LL | crate::issue8845::Something::TupleNums(n, _m) => *n,
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:572:17
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--> tests/ui/use_self.rs:582:17
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LL | crate::issue8845::Something::StructNums { one, two: _ } => *one,
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:588:17
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--> tests/ui/use_self.rs:598:17
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LL | let Foo(x) = self;
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| ^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:593:17
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--> tests/ui/use_self.rs:603:17
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LL | let crate::issue8845::Foo(x) = self;
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| ^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:600:17
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--> tests/ui/use_self.rs:610:17
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LL | let Bar { x, .. } = self;
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| ^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:605:17
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--> tests/ui/use_self.rs:615:17
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LL | let crate::issue8845::Bar { x, .. } = self;
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| ^^^^^^^^^^^^^^^^^^^^^ help: use the applicable keyword: `Self`
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error: unnecessary structure name repetition
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--> tests/ui/use_self.rs:644:17
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--> tests/ui/use_self.rs:654:17
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LL | E::A => {},
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| ^ help: use the applicable keyword: `Self`
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error: aborting due to 42 previous errors
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error: aborting due to 43 previous errors
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Loading…
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