1 files changed, 64 insertions, 0 deletions
diff --git a/vendor/ramsey/collection/src/AbstractSet.php b/vendor/ramsey/collection/src/AbstractSet.php
new file mode 100644
index 000000000..674fda03d
--- /dev/null
+++ b/vendor/ramsey/collection/src/AbstractSet.php
@@ -0,0 +1,64 @@
+<?php
+
+/**
+ * This file is part of the ramsey/collection library
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
+ * @license http://opensource.org/licenses/MIT MIT
+ */
+
+declare(strict_types=1);
+
+namespace Ramsey\Collection;
+
+use Ramsey\Collection\Exception\InvalidArgumentException;
+
+/**
+ * This class contains the basic implementation of a collection that does not
+ * allow duplicated values (a set), to minimize the effort required to implement
+ * this specific type of collection.
+ */
+abstract class AbstractSet extends AbstractCollection
+{
+    /**
+     * Adds the specified element to this set, if it is not already present.
+     *
+     * @param mixed $element The element to add to the set.
+     *
+     * @return bool `true` if this set did not already contain the specified
+     *     element.
+     *
+     * @throws InvalidArgumentException when the element does not match the
+     *     specified type for this set.
+     */
+    public function add($element): bool
+    {
+        if ($this->contains($element)) {
+            return false;
+        }
+
+        return parent::add($element);
+    }
+
+    /**
+     * Sets the given value to the given offset in this set, if it is not
+     * already present.
+     *
+     * @param mixed|null $offset The offset is ignored and is treated as `null`.
+     * @param mixed $value The value to set at the given offset.
+     *
+     * @throws InvalidArgumentException when the value does not match the
+     *     specified type for this set.
+     */
+    public function offsetSet($offset, $value): void
+    {
+        if ($this->contains($value)) {
+            return;
+        }
+
+        parent::offsetSet($offset, $value);
+    }
+}