ExpressionLanguageProvider.php

<?php


/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\Validator\Constraints;

use Symfony\Component\ExpressionLanguage\ExpressionFunction;
use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
class ExpressionLanguageProvider implements ExpressionFunctionProviderInterface {
    public function getFunctions() : array {
        return [
            new ExpressionFunction('is_valid', function (...$arguments) {
                return \sprintf('0 === $context->getValidator()->inContext($context)->validate(%s)->getViolations()->count()', implode(', ', $arguments));
            }, function (array $variables, ...$arguments) : bool {
                return 0 === $variables['context']->getValidator()
                    ->inContext($variables['context'])
                    ->validate(...$arguments)
                    ->getViolations()
                    ->count();
            }),
        ];
    }

}