Merge #10174

10174: fix: path display error when start with `crate` r=flodiebold a=dzvon

Fixes  #10172

Co-authored-by: Dezhi Wu <wu543065657@163.com>

crates/hir_ty/src/display.rs

@@ -1141,20 +1141,22 @@ impl HirDisplay for Path {
                 write!(f, ">")?;
             }
             (_, PathKind::Plain) => {}
-            (_, PathKind::Abs) => write!(f, "::")?,
+            (_, PathKind::Abs) => {}
             (_, PathKind::Crate) => write!(f, "crate")?,
             (_, PathKind::Super(0)) => write!(f, "self")?,
             (_, PathKind::Super(n)) => {
-                write!(f, "super")?;
-                for _ in 0..*n {
-                    write!(f, "::super")?;
+                for i in 0..*n {
+                    if i > 0 {
+                        write!(f, "::")?;
+                    }
+                    write!(f, "super")?;
                 }
             }
             (_, PathKind::DollarCrate(_)) => write!(f, "{{extern_crate}}")?,
         }
 
         for (seg_idx, segment) in self.segments().iter().enumerate() {
-            if seg_idx != 0 {
+            if !matches!(self.kind(), PathKind::Plain) || seg_idx > 0 {
                 write!(f, "::")?;
             }
             write!(f, "{}", segment.name)?;

crates/ide/src/hover.rs

@@ -962,6 +962,50 @@ fn main() { let foo_test = fo$0o(); }
                 ```
             "#]],
         );
+
+        // Use literal `crate` in path
+        check(
+            r#"
+pub struct X;
+
+fn foo() -> crate::X { X }
+
+fn main() { f$0oo(); }
+        "#,
+            expect![[r#"
+            *foo*
+
+            ```rust
+            test
+            ```
+
+            ```rust
+            fn foo() -> crate::X
+            ```
+        "#]],
+        );
+
+        // Check `super` in path
+        check(
+            r#"
+pub struct X;
+
+mod m { pub fn foo() -> super::X { super::X } }
+
+fn main() { m::f$0oo(); }
+        "#,
+            expect![[r#"
+                *foo*
+
+                ```rust
+                test::m
+                ```
+
+                ```rust
+                pub fn foo() -> super::X
+                ```
+            "#]],
+        );
     }
 
     #[test]