Adds support for parent type resolving

src/TypeResolver.php

@@ -50,6 +50,7 @@ final class TypeResolver
         'self' => 'phpDocumentor\Reflection\Types\Self_',
         '$this' => 'phpDocumentor\Reflection\Types\This',
         'static' => 'phpDocumentor\Reflection\Types\Static_',
+        'parent' => 'phpDocumentor\Reflection\Types\Parent_',
         'iterable' => Iterable_::class,
     );
 

src/Types/Parent_.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * This file is part of phpDocumentor.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @copyright 2010-2015 Mike van Riel<mike@phpdoc.org>
+ * @license   http://www.opensource.org/licenses/mit-license.php MIT
+ * @link      http://phpdoc.org
+ */
+
+namespace phpDocumentor\Reflection\Types;
+
+use phpDocumentor\Reflection\Type;
+
+/**
+ * Value Object representing the 'parent' type.
+ *
+ * Parent, as a Type, represents the parent class of class in which the associated element was defined.
+ */
+final class Parent_ implements Type
+{
+    /**
+     * Returns a rendered output of the Type as it would be used in a DocBlock.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return 'parent';
+    }
+}

tests/unit/TypeResolverTest.php

@@ -401,6 +401,7 @@ public function provideKeywords()
             ['$this', 'phpDocumentor\Reflection\Types\This'],
             ['static', 'phpDocumentor\Reflection\Types\Static_'],
             ['self', 'phpDocumentor\Reflection\Types\Self_'],
+            ['parent', 'phpDocumentor\Reflection\Types\Parent_'],
             ['iterable', Iterable_::class],
         ];
     }