Rename folders

expressions/src/data/null.ts

@@ -0,0 +1,17 @@
+import {ExpressionData, ExpressionDataInterface, Kind} from "./expressiondata";
+
+export class Null implements ExpressionDataInterface {
+  constructor() {}
+
+  public readonly kind = Kind.Null;
+
+  public primitive = true;
+
+  coerceString(): string {
+    return "";
+  }
+
+  number(): number {
+    return 0;
+  }
+}