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Auto merge of #12961 - GuillaumeGomez:fix-manual_unwrap_or_default, r=Alexendoo

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Fix incorrect suggestion for `manual_unwrap_or_default`

Fixes #12928.

If this not a "simple" pattern, better not emit the lint.

changelog: Fix incorrect suggestion for `manual_unwrap_or_default`
This commit is contained in:
bors 2024-06-21 17:05:43 +00:00
commit 0ce07f61db
3 changed files with 44 additions and 7 deletions
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9
clippy_lints/src/manual_unwrap_or_default.rs
View file

@ -53,6 +53,7 @@ declare_lint_pass!(ManualUnwrapOrDefault => [MANUAL_UNWRAP_OR_DEFAULT]);
fn get_some<'tcx>(cx: &LateContext<'tcx>, pat: &Pat<'tcx>) -> Option<HirId> {
if let PatKind::TupleStruct(QPath::Resolved(_, path), &[pat], _) = pat.kind
&& let PatKind::Binding(_, pat_id, _, _) = pat.kind
&& let Some(def_id) = path.res.opt_def_id()
// Since it comes from a pattern binding, we need to get the parent to actually match
// against it.
@ -60,13 +61,7 @@ fn get_some<'tcx>(cx: &LateContext<'tcx>, pat: &Pat<'tcx>) -> Option<HirId> {
&& (cx.tcx.lang_items().get(LangItem::OptionSome) == Some(def_id)
|| cx.tcx.lang_items().get(LangItem::ResultOk) == Some(def_id))
{
let mut bindings = Vec::new();
pat.each_binding(|_, id, _, _| bindings.push(id));
if let &[id] = bindings.as_slice() {
Some(id)
} else {
None
}
Some(pat_id)
} else {
None
}

21
tests/ui/manual_unwrap_or_default.fixed
View file

@ -78,3 +78,24 @@ fn issue_12569() {
0
};
}
// Should not warn!
fn issue_12928() {
let x = Some((1, 2));
let y = if let Some((a, _)) = x { a } else { 0 };
let y = if let Some((a, ..)) = x { a } else { 0 };
let x = Some([1, 2]);
let y = if let Some([a, _]) = x { a } else { 0 };
let y = if let Some([a, ..]) = x { a } else { 0 };
struct X {
a: u8,
b: u8,
}
let x = Some(X { a: 0, b: 0 });
let y = if let Some(X { a, .. }) = x { a } else { 0 };
struct Y(u8, u8);
let x = Some(Y(0, 0));
let y = if let Some(Y(a, _)) = x { a } else { 0 };
let y = if let Some(Y(a, ..)) = x { a } else { 0 };
}

21
tests/ui/manual_unwrap_or_default.rs
View file

@ -111,3 +111,24 @@ fn issue_12569() {
0
};
}
// Should not warn!
fn issue_12928() {
let x = Some((1, 2));
let y = if let Some((a, _)) = x { a } else { 0 };
let y = if let Some((a, ..)) = x { a } else { 0 };
let x = Some([1, 2]);
let y = if let Some([a, _]) = x { a } else { 0 };
let y = if let Some([a, ..]) = x { a } else { 0 };
struct X {
a: u8,
b: u8,
}
let x = Some(X { a: 0, b: 0 });
let y = if let Some(X { a, .. }) = x { a } else { 0 };
struct Y(u8, u8);
let x = Some(Y(0, 0));
let y = if let Some(Y(a, _)) = x { a } else { 0 };
let y = if let Some(Y(a, ..)) = x { a } else { 0 };
}