Added nested functions to the Fun parser. (0.40.0)

examples/snippets/nested.fun

@@ -0,0 +1,22 @@
+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Demonstrates nested functions that are only visible inside the
+ * outer function where they are defined. This example avoids
+ * capturing outer variables (closures) and instead passes values
+ * explicitly, which works with the current implementation.
+ *
+ * Added: 2026-04-02
+ */
+
+fun outer(x)
+  fun inner(y)
+    return y * 2
+  end
+  return inner(x) + inner(3)
+end
+
+print(outer(5))