Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/validator/Constraints/AbstractComparisonValidator.php

@@ -0,0 +1,83 @@
+<?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\Validator\Context\ExecutionContextInterface;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+/**
+ * Provides a base class for the validation of property comparisons.
+ *
+ * @author Daniel Holmes <daniel@danielholmes.org>
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+abstract class AbstractComparisonValidator extends ConstraintValidator
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof AbstractComparison) {
+            throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\AbstractComparison');
+        }
+
+        if (null === $value) {
+            return;
+        }
+
+        $comparedValue = $constraint->value;
+
+        // Convert strings to DateTimes if comparing another DateTime
+        // This allows to compare with any date/time value supported by
+        // the DateTime constructor:
+        // http://php.net/manual/en/datetime.formats.php
+        if (is_string($comparedValue)) {
+            if ($value instanceof \DatetimeImmutable) {
+                // If $value is immutable, convert the compared value to a
+                // DateTimeImmutable too
+                $comparedValue = new \DatetimeImmutable($comparedValue);
+            } elseif ($value instanceof \DateTime || $value instanceof \DateTimeInterface) {
+                // Otherwise use DateTime
+                $comparedValue = new \DateTime($comparedValue);
+            }
+        }
+
+        if (!$this->compareValues($value, $comparedValue)) {
+            if ($this->context instanceof ExecutionContextInterface) {
+                $this->context->buildViolation($constraint->message)
+                    ->setParameter('{{ value }}', $this->formatValue($value, self::OBJECT_TO_STRING | self::PRETTY_DATE))
+                    ->setParameter('{{ compared_value }}', $this->formatValue($comparedValue, self::OBJECT_TO_STRING | self::PRETTY_DATE))
+                    ->setParameter('{{ compared_value_type }}', $this->formatTypeOf($comparedValue))
+                    ->addViolation();
+            } else {
+                $this->buildViolation($constraint->message)
+                    ->setParameter('{{ value }}', $this->formatValue($value, self::OBJECT_TO_STRING | self::PRETTY_DATE))
+                    ->setParameter('{{ compared_value }}', $this->formatValue($comparedValue, self::OBJECT_TO_STRING | self::PRETTY_DATE))
+                    ->setParameter('{{ compared_value_type }}', $this->formatTypeOf($comparedValue))
+                    ->addViolation();
+            }
+        }
+    }
+
+    /**
+     * Compares the two given values to find if their relationship is valid.
+     *
+     * @param mixed $value1 The first value to compare
+     * @param mixed $value2 The second value to compare
+     *
+     * @return bool true if the relationship is valid, false otherwise
+     */
+    abstract protected function compareValues($value1, $value2);
+}