// This is the test unit, not the actual code.#include"moonshine.h"datatype(binarytree,((leaf,int),(node,binarytree*,int,binarytree*)));intmain(){constautotree=instance(binarytree,leaf,3);match(tree){of(leaf,v)print("Leafy ",v);of(node,_,v,_)print("Nodey ",v);other()print("Idk man");}return0;}