Convert doc comment to attr

crates/ra_mbe/src/tests.rs

@@ -867,6 +867,31 @@ fn test_meta() {
     );
 }
 
+#[test]
+fn test_meta_doc_comments() {
+    let rules = create_rules(
+        r#"
+        macro_rules! foo {
+            ($(#[$ i:meta])+) => (
+                $(#[$ i])+
+                fn bar() {}
+            )
+        }
+"#,
+    );
+    assert_expansion(
+        MacroKind::Items,
+        &rules,
+        r#"foo! { 
+            /// Single Line Doc 1
+            /** 
+                MultiLines Doc
+            */
+        }"#,
+        "# [doc = \" Single Line Doc 1\"] # [doc = \" \\n                MultiLines Doc\\n            \"] fn bar () {}",
+    );
+}
+
 #[test]
 fn test_tt_block() {
     let rules = create_rules(