fix: remove space within {} when no fields in struct

Author: roife

src/tools/rust-analyzer/crates/hir/src/display.rs

@@ -249,19 +249,23 @@ fn display_fields(
         }
     } else {
         f.write_char('{')?;
-        f.write_char(separator)?;
-        for field in &fields[..count] {
-            f.write_str(indent)?;
-            field.hir_fmt(f)?;
-            f.write_char(',')?;
-            f.write_char(separator)?;
-        }
 
-        if fields.len() > count {
-            f.write_str(indent)?;
-            f.write_str("/* … */")?;
+        if !fields.is_empty() {
             f.write_char(separator)?;
+            for field in &fields[..count] {
+                f.write_str(indent)?;
+                field.hir_fmt(f)?;
+                f.write_char(',')?;
+                f.write_char(separator)?;
+            }
+
+            if fields.len() > count {
+                f.write_str(indent)?;
+                f.write_str("/* … */")?;
+                f.write_char(separator)?;
+            }
         }
+
         f.write_str("}")?;
     }
 

src/tools/rust-analyzer/crates/ide/src/hover/tests.rs

@@ -1039,7 +1039,27 @@ fn hover_record_struct_limit() {
             struct Foo { /* … */ }
             ```
         "#]],
-    )
+    );
+
+    // No extra spaces within `{}` when there are no fields
+    check_hover_fields_limit(
+        5,
+        r#"
+    struct Foo$0 {}
+    "#,
+        expect![[r#"
+            *Foo*
+
+            ```rust
+            test
+            ```
+
+            ```rust
+            // size = 0, align = 1
+            struct Foo {}
+            ```
+        "#]],
+    );
 }
 
 #[test]