February 21, 2018 23:39 · Feb 21, 2018
diff --git a/playground.rs b/playground.rs
@@ -0,0 +1,38 @@
+#![feature(trace_macros)] trace_macros!(true);
+macro_rules! doc_items {
+    (@distribute $docs:tt $($item:item)*) => {
+        $(doc_items!(@output $docs $item);)*
+    };
+    (@output [$($doc:expr),*] $item:item) => {
+        $(#[doc=$doc])*
+        $item
+    };
+
+    {
+        $(
+            $(#[doc = $doc:expr])*
+            {
+                $(
+                    $item:item
+                )*
+            }
+        )+
+    } => {
+        $(doc_items!(@distribute [$($doc),*] $($item)*);)*
+    };
+}
+
+doc_items! {
+    /// A
+    {
+        struct Foo;
+        struct Bar;
+    }
+    /// B
+    {
+        struct Baz;
+        struct Quux;
+    }
+}
+
+fn main() {}