minor #18781 [Validator] Deprecate annotations (alexandre-daubois)

This PR was merged into the 6.4 branch.

Discussion
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[Validator] Deprecate annotations

Fix #18780

Commits
-------

597644a [Validator] Deprecate annotations

Author: javiereguiluz

components/validator/resources.rst

@@ -86,7 +86,14 @@ configure the locations of these files::
 The AnnotationLoader
 --------------------
 
-At last, the component provides an
+.. deprecated:: 6.4
+
+    The :class:`Symfony\\Component\\Validator\\Mapping\\Loader\\AnnotationLoader`
+    is deprecated since Symfony 6.4, use the
+    :class:`Symfony\\Component\\Validator\\Mapping\\Loader\\AttributeLoader`
+    instead.
+
+The component provides an
 :class:`Symfony\\Component\\Validator\\Mapping\\Loader\\AnnotationLoader` to get
 the metadata from the annotations of the class. Annotations are defined as ``@``
 prefixed classes included in doc block comments (``/** ... */``). For example::
@@ -121,8 +128,44 @@ If you use annotations instead of attributes, it's also required to call
 To disable the annotation loader after it was enabled, call
 :method:`Symfony\\Component\\Validator\\ValidatorBuilder::disableAnnotationMapping`.
 
+.. deprecated:: 6.4
+
+    The :method:`Symfony\\Component\\Validator\\ValidatorBuilder::enableAnnotationMapping`
+    and :method:`Symfony\\Component\\Validator\\ValidatorBuilder::disableAnnotationMapping`
+    methods are deprecated since Symfony 6.4, use the
+    :method:`Symfony\\Component\\Validator\\ValidatorBuilder::enableAttributeMapping`
+    and :method:`Symfony\\Component\\Validator\\ValidatorBuilder::disableAttributeMapping`
+    methods instead.
+
 .. include:: /_includes/_annotation_loader_tip.rst.inc
 
+The AttributeLoader
+-------------------
+
+.. versionadded:: 6.4
+
+    The :class:`Symfony\\Component\\Validator\\Mapping\\Loader\\AttributeLoader`
+    was introduced in Symfony 6.4.
+
+The component provides an
+:class:`Symfony\\Component\\Validator\\Mapping\\Loader\\AttributeLoader` to get
+the metadata from the attributes of the class. For example::
+
+    use Symfony\Component\Validator\Constraints as Assert;
+    // ...
+
+    class User
+    {
+        #[Assert\NotBlank]
+        protected string $name;
+    }
+
+To enable the attribute loader, call the
+:method:`Symfony\\Component\\Validator\\ValidatorBuilder::enableAttributeMapping` method.
+
+To disable the annotation loader after it was enabled, call
+:method:`Symfony\\Component\\Validator\\ValidatorBuilder::disableAttributeMapping`.
+
 Using Multiple Loaders
 ----------------------
 
@@ -136,8 +179,7 @@ multiple mappings::
     use Symfony\Component\Validator\Validation;
 
     $validator = Validation::createValidatorBuilder()
-        ->enableAnnotationMapping(true)
-        ->addDefaultDoctrineAnnotationReader()
+        ->enableAttributeMapping()
         ->addMethodMapping('loadValidatorMetadata')
         ->addXmlMapping('validator/validation.xml')
         ->getValidator();

form/unit_testing.rst

@@ -216,7 +216,7 @@ allows you to return a list of extensions to register::
 
             // or if you also need to read constraints from annotations
             $validator = Validation::createValidatorBuilder()
-                ->enableAnnotationMapping(true)
+                ->enableAttributeMapping()
                 ->getValidator();
 
             return [

reference/configuration/framework.rst

@@ -2671,6 +2671,18 @@ enable_annotations
 
 If this option is enabled, validation constraints can be defined using annotations or attributes.
 
+.. deprecated:: 6.4
+
+    This option is deprecated since Symfony 6.4, use the ``enable_attributes``
+    option instead.
+
+enable_attributes
+.................
+
+**type**: ``boolean`` **default**: ``true``
+
+If this option is enabled, validation constraints can be defined using attributes.
+
 translation_domain
 ..................
 
@@ -2862,6 +2874,18 @@ enable_annotations
 
 If this option is enabled, serialization groups can be defined using annotations or attributes.
 
+.. deprecated:: 6.4
+
+    This option is deprecated since Symfony 6.4, use the ``enable_attributes``
+    option instead.
+
+enable_attributes
+.................
+
+**type**: ``boolean`` **default**: ``true``
+
+If this option is enabled, serialization groups can be defined using attributes.
+
 .. seealso::
 
     For more information, see :ref:`serializer-using-serialization-groups-attributes`.