1 files changed, 16 insertions, 0 deletions
diff --git a/docs/type_system/empty.md b/docs/type_system/empty.md
index ab0226d..55bdcf1 100644
--- a/docs/type_system/empty.md
+++ b/docs/type_system/empty.md
@@ -5,3 +5,19 @@
 Container type can be null
 
 ## Use with `Option` Union
+
+```text
+make_array : Fn[yes] $ (
+    ? yes {
+        `some Array $ (1; 2; 3)
+        `nome
+    }
+)
+v : make_array(...) // Empty[Array[I64]] $ .none OR Empty[Array[I64]] $ (.some : (1; 2; 3))
+# v {
+    .some {[x] `log x } // Array[I64] $ (1; 2; 3)
+    .none { ... }
+}
+// same as above
+? v {[x] `log x } // Array[I64] $ (1; 2; 3)
+```