Continued work on parser, now calling functions and rolling correctly

app/imports/parser/parseTree/SymbolNode.js

@@ -1,9 +1,10 @@
 import ParseNode from '/imports/parser/parseTree/ParseNode.js';
 import ConstantNode from '/imports/parser/parseTree/ConstantNode.js';
+import ErrorNode from '/imports/parser/parseTree/ErrorNode.js';
 
 export default class SymbolNode extends ParseNode {
   constructor({name}){
-		super();
+		super(...arguments);
     this.name = name;
   }
   toString(){
@@ -13,12 +14,11 @@ export default class SymbolNode extends ParseNode {
     let value = scope && scope[this.name];
     let type = typeof value;
     if (type === 'string' || type === 'number' || type === 'boolean'){
-      return new ConstantNode({value, type});
+      return new ConstantNode({value, type, previousNodes: [this]});
     } else if (type === 'undefined'){
-      return new ConstantNode({
-        value: this.name,
-        type: 'uncompiledNode',
-        errors: [`${this.name} could not be resolved`]
+      return new ErrorNode({
+        node: this,
+        error: `${this.name} could not be resolved`,
       });
     } else {
       throw new Meteor.Error(`Unexpected case: ${this.name} resolved to ${value}`);