Device macro to generate stateful and publish variants of device specific poll inputs.

macros/node-poll-variants/tests/generate.rs

@@ -0,0 +1,11 @@
+use node_poll_variants::{PollVariants};
+
+#[derive(PollVariants)]
+struct ExamplePoll<'a, FirstT: Copy, SecondT> {
+    a: &'a i32,
+    b: i32,
+    first: FirstT,
+    second: SecondT,
+}
+
+fn main() {}