Implement variadic support in luaify

crates/luaify/tests/test.rs

@@ -373,3 +373,21 @@ fn ifs() {
         r#"function()if a==b then c();elseif b==c then return a();else d();end;end"#
     );
 }
+
+#[test]
+fn variadic() {
+    assert_eq!(luaify!(|a, b, variadic!()| {}), r#"function(a,b,...)end"#);
+    assert_eq!(
+        luaify!(|variadic!()| {
+            let (a, b) = variadic!();
+        }),
+        r#"function(...)local a,b=...;end"#
+    );
+    assert_eq!(
+        luaify!(|a, variadic!()| {
+            let (a, b) = (a, b, c, variadic!());
+            func(a, b, (c, (d, variadic!())))
+        }),
+        r#"function(a,...)local a,b=a,b,c,...;return func(a,b,c,d,...);end"#
+    );
+}