Debug print the dev syntax tree
diff --git a/dev/parse.rs b/dev/parse.rs
index 8f7fc44..2934066 100644
--- a/dev/parse.rs
+++ b/dev/parse.rs
@@ -5,6 +5,7 @@
 
 #[proc_macro]
 pub fn r#mod(input: TokenStream) -> TokenStream {
-    parse_macro_input!(input as File);
+    let file = parse_macro_input!(input as File);
+    println!("{:#?}", file);
     "fn main() {}".parse().unwrap()
 }