Use loop() to recurse instead of loop.recurse()

src/ExpressionParser.php

@@ -460,6 +460,15 @@ class ExpressionParser
                 }
 
                 return new GetAttrExpression($args->getNode('0'), $args->getNode('1'), \count($args) > 2 ? $args->getNode('2') : null, Template::ANY_CALL, $line);
+            case 'loop':
+                $args = $this->parseArguments();
+                if (\count($args) < 1) {
+                    throw new SyntaxError('The "loop" function takes an iterator as an argument.', $line, $this->parser->getStream()->getSourceContext());
+                }
+                $recurseArgs = new ArrayExpression([], $line);
+                $recurseArgs->addElement($args->getNode('0'));
+
+                return new GetAttrExpression(new NameExpression('loop', $line), new ConstantExpression('__invoke', $line), $recurseArgs, Template::METHOD_CALL, $line);
             default:
                 if (null !== $alias = $this->parser->getImportedSymbol('function', $name)) {
                     $arguments = new ArrayExpression([], $line);