protected function compileString(Twig_NodeList $body)
{
$msg = '';
$vars = array();
foreach ($body->getNodes() as $i => $node) {
if ($node instanceof Twig_Node_Text) {
$msg .= $node->getData();
} elseif ($node instanceof Twig_Node_Print && $node->getExpression() instanceof Twig_Node_Expression_Name) {
$msg .= sprintf('%%%s%%', $node->getExpression()->getName());
$vars[] = $node->getExpression();
} else {
throw new Twig_SyntaxError(sprintf('The text to be translated with "trans" can only contain references to simple variable'), $this->lineno);
}
}
return array(trim($msg), $vars);
}
