39     public function getSafe(\Twig_NodeInterface $node)  argument
41         $hash = spl_object_hash($node);
47             if ($bucket['key'] !== $node) {
59     protected function setSafe(\Twig_NodeInterface $node, array $safe)  argument
61         $hash = spl_object_hash($node);
64                 if ($bucket['key'] === $node) {
72             'key' => $node,
77     protected function doEnterNode(Node $node, Environment $env)  argument
79         return $node;
82     protected function doLeaveNode(Node $node, Environment $env)  argument
84         if ($node instanceof ConstantExpression) {
86             $this->setSafe($node, ['all']);
87         } elseif ($node instanceof BlockReferenceExpression) {
89             $this->setSafe($node, ['all']);
90         } elseif ($node instanceof ParentExpression) {
92             $this->setSafe($node, ['all']);
93         } elseif ($node instanceof ConditionalExpression) {
95 …$safe = $this->intersectSafe($this->getSafe($node->getNode('expr2')), $this->getSafe($node->getNod…
96             $this->setSafe($node, $safe);
97         } elseif ($node instanceof FilterExpression) {
99             $name = $node->getNode('filter')->getAttribute('value');
100             $args = $node->getNode('arguments');
104 …$safe = $this->intersectSafe($this->getSafe($node->getNode('node')), $filter->getPreservesSafety()…
106                 $this->setSafe($node, $safe);
108                 $this->setSafe($node, []);
110         } elseif ($node instanceof FunctionExpression) {
112             $name = $node->getAttribute('name');
113             $args = $node->getNode('arguments');
116                 $this->setSafe($node, $function->getSafe($args));
118                 $this->setSafe($node, []);
120         } elseif ($node instanceof MethodCallExpression) {
121             if ($node->getAttribute('safe')) {
122                 $this->setSafe($node, ['all']);
124                 $this->setSafe($node, []);
126 …} elseif ($node instanceof GetAttrExpression && $node->getNode('node') instanceof NameExpression) {
127             $name = $node->getNode('node')->getAttribute('name');
130                 $this->setSafe($node, ['all']);
132                 $this->setSafe($node, []);
135             $this->setSafe($node, []);
138         return $node;