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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/tools/clippy/tests/ui/use_self_trait.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/tools/clippy/tests/ui/use_self_trait.rs')
-rw-r--r-- | src/tools/clippy/tests/ui/use_self_trait.rs | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/use_self_trait.rs b/src/tools/clippy/tests/ui/use_self_trait.rs new file mode 100644 index 000000000..de305d40f --- /dev/null +++ b/src/tools/clippy/tests/ui/use_self_trait.rs @@ -0,0 +1,115 @@ +// run-rustfix + +#![warn(clippy::use_self)] +#![allow(dead_code)] +#![allow(clippy::should_implement_trait, clippy::boxed_local)] + +use std::ops::Mul; + +trait SelfTrait { + fn refs(p1: &Self) -> &Self; + fn ref_refs<'a>(p1: &'a &'a Self) -> &'a &'a Self; + fn mut_refs(p1: &mut Self) -> &mut Self; + fn nested(p1: Box<Self>, p2: (&u8, &Self)); + fn vals(r: Self) -> Self; +} + +#[derive(Default)] +struct Bad; + +impl SelfTrait for Bad { + fn refs(p1: &Bad) -> &Bad { + p1 + } + + fn ref_refs<'a>(p1: &'a &'a Bad) -> &'a &'a Bad { + p1 + } + + fn mut_refs(p1: &mut Bad) -> &mut Bad { + p1 + } + + fn nested(_p1: Box<Bad>, _p2: (&u8, &Bad)) {} + + fn vals(_: Bad) -> Bad { + Bad::default() + } +} + +impl Mul for Bad { + type Output = Bad; + + fn mul(self, rhs: Bad) -> Bad { + rhs + } +} + +impl Clone for Bad { + fn clone(&self) -> Self { + // FIXME: applicable here + Bad + } +} + +#[derive(Default)] +struct Good; + +impl SelfTrait for Good { + fn refs(p1: &Self) -> &Self { + p1 + } + + fn ref_refs<'a>(p1: &'a &'a Self) -> &'a &'a Self { + p1 + } + + fn mut_refs(p1: &mut Self) -> &mut Self { + p1 + } + + fn nested(_p1: Box<Self>, _p2: (&u8, &Self)) {} + + fn vals(_: Self) -> Self { + Self::default() + } +} + +impl Mul for Good { + type Output = Self; + + fn mul(self, rhs: Self) -> Self { + rhs + } +} + +trait NameTrait { + fn refs(p1: &u8) -> &u8; + fn ref_refs<'a>(p1: &'a &'a u8) -> &'a &'a u8; + fn mut_refs(p1: &mut u8) -> &mut u8; + fn nested(p1: Box<u8>, p2: (&u8, &u8)); + fn vals(p1: u8) -> u8; +} + +// Using `Self` instead of the type name is OK +impl NameTrait for u8 { + fn refs(p1: &Self) -> &Self { + p1 + } + + fn ref_refs<'a>(p1: &'a &'a Self) -> &'a &'a Self { + p1 + } + + fn mut_refs(p1: &mut Self) -> &mut Self { + p1 + } + + fn nested(_p1: Box<Self>, _p2: (&Self, &Self)) {} + + fn vals(_: Self) -> Self { + Self::default() + } +} + +fn main() {} |