Typescript all the parser things

app/imports/parser/toString.ts

@@ -0,0 +1,7 @@
+import factories from './parseTree';
+import ParseNode from '/imports/parser/parseTree/ParseNode';
+
+export default function toString(node: ParseNode) {
+  if (!node) return '';
+  return factories[node.parseType].toString(node as any, toString);
+}