commit 0ea38785985b2e17a518c1b0347231bf1d4ca7a8
Author: upstream <upstream@localhost>
Date:   Thu Sep 3 14:34:44 2026 +0200

    Upstream myclabs/DeepCopy state of the touched files before 6d74592b9e

diff --git a/src/DeepCopy/TypeFilter/Date/DateIntervalFilter.php b/src/DeepCopy/TypeFilter/Date/DateIntervalFilter.php
new file mode 100644
index 0000000..62aaea5
--- /dev/null
+++ b/src/DeepCopy/TypeFilter/Date/DateIntervalFilter.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace DeepCopy\TypeFilter\Date;
+
+use DateInterval;
+use DeepCopy\TypeFilter\TypeFilter;
+
+/**
+ * @final
+ *
+ * @deprecated Will be removed in 2.0. This filter will no longer be necessary in PHP 7.1+.
+ */
+class DateIntervalFilter implements TypeFilter
+{
+
+    /**
+     * {@inheritdoc}
+     *
+     * @param DateInterval $element
+     *
+     * @see http://news.php.net/php.bugs/205076
+     */
+    public function apply(mixed $element)
+    {
+        $copy = new DateInterval('P0D');
+
+        foreach ($element as $propertyName => $propertyValue) {
+            $copy->{$propertyName} = $propertyValue;
+        }
+
+        return $copy;
+    }
+}
diff --git a/tests/DeepCopyTest/TypeFilter/Date/DateIntervalFilterTest.php b/tests/DeepCopyTest/TypeFilter/Date/DateIntervalFilterTest.php
new file mode 100644
index 0000000..9552f56
--- /dev/null
+++ b/tests/DeepCopyTest/TypeFilter/Date/DateIntervalFilterTest.php
@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+
+namespace DeepCopyTest\TypeFilter\Date;
+
+use DateInterval;
+use DeepCopy\TypeFilter\Date\DateIntervalFilter;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \DeepCopy\TypeFilter\Date\DateIntervalFilter
+ */
+class DateIntervalFilterTest extends TestCase
+{
+    public function test_it_deep_copies_a_DateInterval()
+    {
+        $object = new DateInterval('P2D');;
+
+        $filter = new DateIntervalFilter();
+
+        $copy = $filter->apply($object);
+
+        $this->assertEquals($object, $copy);
+        $this->assertNotSame($object, $copy);
+    }
+}