protected function initExtension(Twig_ExtensionInterface $extension)
{
// filters
foreach ($extension->getFilters() as $name => $filter) {
if ($name instanceof Twig_SimpleFilter) {
$filter = $name;
$name = $filter->getName();
} elseif ($filter instanceof Twig_SimpleFilter) {
$name = $filter->getName();
}
$this->filters[$name] = $filter;
}
// functions
foreach ($extension->getFunctions() as $name => $function) {
if ($name instanceof Twig_SimpleFunction) {
$function = $name;
$name = $function->getName();
} elseif ($function instanceof Twig_SimpleFunction) {
$name = $function->getName();
}
$this->functions[$name] = $function;
}
// tests
foreach ($extension->getTests() as $name => $test) {
if ($name instanceof Twig_SimpleTest) {
$test = $name;
$name = $test->getName();
} elseif ($test instanceof Twig_SimpleTest) {
$name = $test->getName();
}
$this->tests[$name] = $test;
}
// globals
$this->globals = array_merge($this->globals, $extension->getGlobals());
// token parsers
foreach ($extension->getTokenParsers() as $parser) {
if ($parser instanceof Twig_TokenParserInterface) {
$this->parsers->addTokenParser($parser);
} elseif ($parser instanceof Twig_TokenParserBrokerInterface) {
$this->parsers->addTokenParserBroker($parser);
} else {
throw new LogicException('getTokenParsers() must return an array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances');
}
}
// node visitors
foreach ($extension->getNodeVisitors() as $visitor) {
$this->visitors[] = $visitor;
}
// operators
if ($operators = $extension->getOperators()) {
if (2 !== count($operators)) {
throw new InvalidArgumentException(sprintf('"%s::getOperators()" does not return a valid operators array.', get_class($extension)));
}
$this->unaryOperators = array_merge($this->unaryOperators, $operators[0]);
$this->binaryOperators = array_merge($this->binaryOperators, $operators[1]);
}
}
