Create evaluators for literals, list and identifier nodes

smnp/runtime/evaluators/iterable.py

@@ -0,0 +1,10 @@
+def abstractIterableEvaluator(itemEvaluator):
+    def evaluator(node, environment):
+        evaluatedItems = []
+        for item in node.children:
+            result = itemEvaluator(item, environment)
+            evaluatedItems.append(result.value)
+
+        return evaluatedItems
+
+    return evaluator