Fix manual_unwrap_or_default FP on ref binding (#14731)

Closes #14716

changelog: [`manual_unwrap_or_default`] fix FP on ref binding

Author: Jarcho

clippy_lints/src/matches/manual_unwrap_or.rs

@@ -1,5 +1,6 @@
 use clippy_utils::consts::ConstEvalCtxt;
 use clippy_utils::source::{SpanRangeExt as _, indent_of, reindent_multiline};
+use rustc_ast::{BindingMode, ByRef};
 use rustc_errors::Applicability;
 use rustc_hir::def::Res;
 use rustc_hir::{Arm, Expr, ExprKind, HirId, LangItem, Pat, PatExpr, PatExprKind, PatKind, QPath};
@@ -16,7 +17,7 @@ use super::{MANUAL_UNWRAP_OR, MANUAL_UNWRAP_OR_DEFAULT};
 
 fn get_some(cx: &LateContext<'_>, pat: &Pat<'_>) -> Option<HirId> {
     if let PatKind::TupleStruct(QPath::Resolved(_, path), &[pat], _) = pat.kind
-        && let PatKind::Binding(_, pat_id, _, _) = pat.kind
+        && let PatKind::Binding(BindingMode(ByRef::No, _), 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.

tests/ui/manual_unwrap_or_default.fixed

@@ -106,3 +106,16 @@ fn issue_12928() {
 fn allowed_manual_unwrap_or_zero() -> u32 {
     Some(42).unwrap_or_default()
 }
+
+mod issue14716 {
+    struct Foo {
+        name: Option<String>,
+    }
+
+    fn bar(project: &Foo) {
+        let _name = match project.name {
+            Some(ref x) => x,
+            None => "",
+        };
+    }
+}

tests/ui/manual_unwrap_or_default.rs

@@ -147,3 +147,16 @@ fn allowed_manual_unwrap_or_zero() -> u32 {
         0
     }
 }
+
+mod issue14716 {
+    struct Foo {
+        name: Option<String>,
+    }
+
+    fn bar(project: &Foo) {
+        let _name = match project.name {
+            Some(ref x) => x,
+            None => "",
+        };
+    }
+}