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vendor/symfony/validator/Constraints/ExpressionLanguageSyntaxValidator.php

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+<?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\ExpressionLanguage;
+use Symfony\Component\ExpressionLanguage\SyntaxError;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
+
+/**
+ * @author Andrey Sevastianov <mrpkmail@gmail.com>
+ */
+class ExpressionLanguageSyntaxValidator extends ConstraintValidator
+{
+    private $expressionLanguage;
+
+    public function __construct(ExpressionLanguage $expressionLanguage = null)
+    {
+        $this->expressionLanguage = $expressionLanguage;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($expression, Constraint $constraint): void
+    {
+        if (!$constraint instanceof ExpressionLanguageSyntax) {
+            throw new UnexpectedTypeException($constraint, ExpressionLanguageSyntax::class);
+        }
+
+        if (!\is_string($expression)) {
+            throw new UnexpectedValueException($expression, 'string');
+        }
+
+        if (null === $this->expressionLanguage) {
+            $this->expressionLanguage = new ExpressionLanguage();
+        }
+
+        try {
+            $this->expressionLanguage->lint($expression, $constraint->allowedVariables);
+        } catch (SyntaxError $exception) {
+            $this->context->buildViolation($constraint->message)
+                ->setParameter('{{ syntax_error }}', $this->formatValue($exception->getMessage()))
+                ->setInvalidValue((string) $expression)
+                ->setCode(ExpressionLanguageSyntax::EXPRESSION_LANGUAGE_SYNTAX_ERROR)
+                ->addViolation();
+        }
+    }
+}