function UrlMatcher::getExpressionLanguage

File

vendor/symfony/routing/Matcher/UrlMatcher.php, line 240

Class

UrlMatcher

UrlMatcher matches URL based on a set of routes.

Namespace

Symfony\Component\Routing\Matcher

Code

protected function getExpressionLanguage() : ExpressionLanguage {
    if (!isset($this->expressionLanguage)) {
        if (!class_exists(ExpressionLanguage::class)) {
            throw new \LogicException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed. Try running "composer require symfony/expression-language".');
        }
        $this->expressionLanguage = new ExpressionLanguage(null, $this->expressionLanguageProviders);
    }
    return $this->expressionLanguage;
}