Finished migrating parser to be object orientation free. All tests pass

app/imports/parser/parseTree/parenthesis.js

@@ -0,0 +1,34 @@
+import resolve, { toString, traverse } from '../resolve.js';
+
+const parenthesis = {
+  create({content}) {
+    return {
+      parseType: 'parenthesis',
+      content,
+    };
+  },
+  resolve(fn, node, scope, context){
+    const {result: content} = resolve(fn, node.content, scope, context);
+    if (
+      fn === 'reduce' ||
+      content.parseType === 'constant' ||
+      content.parseType === 'error'
+    ){
+      return {result: content, context};
+    } else {
+      return {
+        result: parenthesis.create({content}),
+        context
+      };
+    }
+  },
+  toString(node){
+    return `(${toString(node.content)})`;
+  },
+  traverse(node, fn){
+    fn(node);
+    traverse(node.content, fn);
+  }
+}
+
+export default parenthesis;