Start of action system re-write

app/imports/parser/parseTree/unaryOperator.js

@@ -1,4 +1,4 @@
-import resolve, { toString, traverse } from '../resolve.js';
+import resolve, { toString, traverse, map } from '../resolve.js';
 import constant from './constant.js';
 
 const unaryOperator = {
@@ -41,6 +41,13 @@ const unaryOperator = {
     fn(node);
     traverse(node.right, fn);
   },
+  map(node, fn){
+    const resultingNode = fn(node);
+    if (resultingNode === node){
+      node.right = map(node.right, fn);
+    }
+    return resultingNode;
+  },
 };
 
 export default unaryOperator;