function TwigNodeVisitorCheckDeprecations::enterNode

File

core/lib/Drupal/Core/Template/TwigNodeVisitorCheckDeprecations.php, line 36

Class

TwigNodeVisitorCheckDeprecations

Provides a Node Visitor to trigger errors if deprecated variables are used.

Namespace

Code

public function enterNode(Node $node, Environment $env) : Node {
    if ($node instanceof ModuleNode) {
        $this->usedNames = [];
        $this->assignedNames = [];
    }
    elseif ($node instanceof AssignNameExpression) {
        // Setting a variable makes subsequent usage is safe.
        $this->assignedNames[$node->getAttribute('name')] = $node->getAttribute('name');
    }
    elseif ($node instanceof NameExpression) {
        // Track each usage of a variable, unless set within the template.
        $name = $node->getAttribute('name');
        if (!in_array($name, $this->assignedNames)) {
            $this->usedNames[$name] = $name;
        }
    }
    return $node;
}