70     protected function doEnterNode(Node $node, Environment $env)  argument
73             $this->enterOptimizeFor($node, $env);
78                 if (!$node instanceof AbstractExpression) {
79                     if ('Twig_Node' !== \get_class($node)) {
83                     $node = $this->optimizeVariables($node, $env);
85             } elseif ($node instanceof BodyNode) {
90         return $node;
93     protected function doLeaveNode(Node $node, Environment $env)  argument
95         $expression = $node instanceof AbstractExpression;
98             $this->leaveOptimizeFor($node, $env);
102             $node = $this->optimizeRawFilter($node, $env);
105         $node = $this->optimizePrintNode($node, $env);
108             if ($node instanceof BodyNode) {
111 …if (!$expression && 'Twig_Node' !== \get_class($node) && $prependedNodes = array_shift($this->prep…
114                         $nodes[] = new SetTempNode($name, $node->getTemplateLine());
117                     $nodes[] = $node;
118                     $node = new Node($nodes);
123         return $node;
126     protected function optimizeVariables(\Twig_NodeInterface $node, Environment $env)  argument
128         if ('Twig_Node_Expression_Name' === \get_class($node) && $node->isSimple()) {
129             $this->prependedNodes[0][] = $node->getAttribute('name');
131             return new TempNameExpression($node->getAttribute('name'), $node->getTemplateLine());
134         return $node;
146     protected function optimizePrintNode(\Twig_NodeInterface $node, Environment $env)  argument
148         if (!$node instanceof PrintNode) {
149             return $node;
152         $exprNode = $node->getNode('expr');
162         return $node;
170     protected function optimizeRawFilter(\Twig_NodeInterface $node, Environment $env)  argument
172 …if ($node instanceof FilterExpression && 'raw' == $node->getNode('filter')->getAttribute('value'))…
173             return $node->getNode('node');
176         return $node;
182     protected function enterOptimizeFor(\Twig_NodeInterface $node, Environment $env)  argument
184         if ($node instanceof ForNode) {
186             $node->setAttribute('with_loop', false);
187             array_unshift($this->loops, $node);
188 …          array_unshift($this->loopsTargets, $node->getNode('value_target')->getAttribute('name'));
189             array_unshift($this->loopsTargets, $node->getNode('key_target')->getAttribute('name'));
198         elseif ($node instanceof NameExpression && 'loop' === $node->getAttribute('name')) {
199             $node->setAttribute('always_defined', true);
204 …elseif ($node instanceof NameExpression && \in_array($node->getAttribute('name'), $this->loopsTarg…
205             $node->setAttribute('always_defined', true);
209         elseif ($node instanceof BlockReferenceNode || $node instanceof BlockReferenceExpression) {
214         elseif ($node instanceof IncludeNode && !$node->getAttribute('only')) {
219         elseif ($node instanceof FunctionExpression
220             && 'include' === $node->getAttribute('name')
221             && (!$node->getNode('arguments')->hasNode('with_context')
222 …           || false !== $node->getNode('arguments')->getNode('with_context')->getAttribute('value')
229         elseif ($node instanceof GetAttrExpression
230             && (!$node->getNode('attribute') instanceof ConstantExpression
231                 || 'parent' === $node->getNode('attribute')->getAttribute('value')
234                 || ($node->getNode('node') instanceof NameExpression
235                     && 'loop' === $node->getNode('node')->getAttribute('name')
246     protected function leaveOptimizeFor(\Twig_NodeInterface $node, Environment $env)  argument
248         if ($node instanceof ForNode) {