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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/needless_borrowed_ref.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 '')
-rw-r--r-- | src/tools/clippy/tests/ui/needless_borrowed_ref.rs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/needless_borrowed_ref.rs b/src/tools/clippy/tests/ui/needless_borrowed_ref.rs new file mode 100644 index 000000000..500ac448f --- /dev/null +++ b/src/tools/clippy/tests/ui/needless_borrowed_ref.rs @@ -0,0 +1,45 @@ +// run-rustfix + +#[warn(clippy::needless_borrowed_reference)] +#[allow(unused_variables)] +fn main() { + let mut v = Vec::<String>::new(); + let _ = v.iter_mut().filter(|&ref a| a.is_empty()); + // ^ should be linted + + let var = 3; + let thingy = Some(&var); + if let Some(&ref v) = thingy { + // ^ should be linted + } + + let mut var2 = 5; + let thingy2 = Some(&mut var2); + if let Some(&mut ref mut v) = thingy2 { + // ^ should **not** be linted + // v is borrowed as mutable. + *v = 10; + } + if let Some(&mut ref v) = thingy2 { + // ^ should **not** be linted + // here, v is borrowed as immutable. + // can't do that: + //*v = 15; + } +} + +#[allow(dead_code)] +enum Animal { + Cat(u64), + Dog(u64), +} + +#[allow(unused_variables)] +#[allow(dead_code)] +fn foo(a: &Animal, b: &Animal) { + match (a, b) { + (&Animal::Cat(v), &ref k) | (&ref k, &Animal::Cat(v)) => (), // lifetime mismatch error if there is no '&ref' + // ^ and ^ should **not** be linted + (&Animal::Dog(ref a), &Animal::Dog(_)) => (), // ^ should **not** be linted + } +} |