[Validator] Add shorter examples using the default option

reference/constraints/Type.rst

@@ -19,6 +19,67 @@ option to validate this.
 Basic Usage
 -----------
 
+.. configuration-block::
+
+    .. code-block:: php-annotations
+
+        // src/AppBundle/Entity/Author.php
+        namespace AppBundle\Entity;
+
+        use Symfony\Component\Validator\Constraints as Assert;
+
+        class Author
+        {
+            /**
+             * @Assert\Type("integer")
+             */
+            protected $age;
+        }
+
+    .. code-block:: yaml
+
+        # src/AppBundle/Resources/config/validation.yml
+        AppBundle\Entity\Author:
+            properties:
+                age:
+                    - Type: integer
+
+    .. code-block:: xml
+
+        <!-- src/AppBundle/Resources/config/validation.xml -->
+        <?xml version="1.0" encoding="UTF-8" ?>
+        <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
+            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+            xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
+
+            <class name="AppBundle\Entity\Author">
+                <property name="age">
+                    <constraint name="Type">
+                        <type>integer</type>
+                    </constraint>
+                </property>
+            </class>
+        </constraint-mapping>
+
+    .. code-block:: php
+
+        // src/AppBundle/Entity/Author.php
+        namespace AppBundle\Entity;
+
+        use Symfony\Component\Validator\Mapping\ClassMetadata;
+        use Symfony\Component\Validator\Constraints as Assert;
+
+        class Author
+        {
+            public static function loadValidatorMetadata(ClassMetadata $metadata)
+            {
+                $metadata->addPropertyConstraint('age', new Assert\Type('integer');
+            }
+        }
+
+Configure more options
+~~~~~~~~~~~~~~~~~~~~~~
+
 .. configuration-block::
 
     .. code-block:: php-annotations