Move Operators to ExpressionParsers, deprecate ExpressionParser

src/ExpressionParser/InfixAssociativity.php

@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Twig\ExpressionParser;
+
+enum InfixAssociativity
+{
+    case Left;
+    case Right;
+}