add exprt macro

Author: b5

src/n0des.rs

@@ -8,3 +8,13 @@ pub trait N0de: 'static + Send {
         Self: Sized;
     fn shutdown(&mut self) -> impl Future<Output = Result<()>> + Send;
 }
+
+#[macro_export]
+macro_rules! export_node {
+    ($type:ty) => {
+        #[no_mangle]
+        pub extern "C" fn load_plugin() -> Box<dyn $crate::N0de> {
+            Box::new(<$type>::default())
+        }
+    };
+}