From dc15b9b97bd34f0c2634e00a5c4df605ea01c27e Mon Sep 17 00:00:00 2001
From: A4-Tacks <wdsjxhno1001@163.com>
Date: Wed, 17 Dec 2025 16:30:01 +0800
Subject: [PATCH] Complete reference `&T` -> `&&T`
MIME-Version: 1.0
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Example
---
```rust
struct S;
fn foo(s: &&S) {}
fn main() {
    let mut ssss = &S;
    foo($0);
}
```

**Before this PR**

```rust
st S S []
lc ssss &S [local]
st S S []
fn foo(…) fn(&&S) []
fn main() fn() []
```

**After this PR**

```rust
st S S []
lc ssss &S [local]
lc &ssss [type+local]
st S S []
fn foo(…) fn(&&S) []
fn main() fn() []
```
---
 crates/ide-completion/src/render.rs | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/crates/ide-completion/src/render.rs b/crates/ide-completion/src/render.rs
index f2312c64945e..1f1b0fe4342a 100644
--- a/crates/ide-completion/src/render.rs
+++ b/crates/ide-completion/src/render.rs
@@ -630,7 +630,7 @@ fn compute_ref_match(
         return None;
     }
     if let Some(expected_without_ref) = &expected_without_ref
-        && completion_without_ref.is_none()
+        && (completion_without_ref.is_none() || completion_ty == expected_without_ref)
         && completion_ty.autoderef(ctx.db).any(|ty| ty == *expected_without_ref)
     {
         cov_mark::hit!(suggest_ref);
@@ -2232,6 +2232,24 @@ fn main() {
                 fn main() fn() []
             "#]],
         );
+        check_relevance(
+            r#"
+struct S;
+fn foo(s: &&S) {}
+fn main() {
+    let mut ssss = &S;
+    foo($0);
+}
+            "#,
+            expect![[r#"
+                st S S []
+                lc ssss &S [local]
+                lc &ssss [type+local]
+                st S S []
+                fn foo(…) fn(&&S) []
+                fn main() fn() []
+            "#]],
+        );
     }
 
     #[test]