public function compile(ExpressionCompiler $compiler, ExpressionInterface $expr)
{
if (isset($this->serviceMap[$expr->name])) {
$compiler->write("\$context['container']->get('{$this->serviceMap[$expr->name]}'");
if ($expr->allowNull) {
$compiler->write(", " . ContainerInterface::NULL_ON_INVALID_REFERENCE);
}
$compiler->write(")");
return;
}
if (isset($this->parameterMap[$expr->name])) {
$compiler->write("\$context['container']->getParameter('{$this->parameterMap[$expr->name]}')");
return;
}
parent::compile($compiler, $expr);
}
protected function isKnown($variable)
{
return isset($this->serviceMap[$variable]) || isset($this->parameterMap[$variable]) || parent::isKnown($variable);
}