added soe missing deprecations

CHANGELOG

@@ -1,12 +1,14 @@
 * 2.7.0 (2019-XX-XX)
 
+ * deprecated Twig\Extension\InitRuntimeInterface
+ * deprecated Twig\Loader\ExistsLoaderInterface
  * deprecated PSR-0 classes in favor of namespaced ones
  * made namespace classes the default classes (PSR-0 ones are aliases now)
  * added Twig\Loader\ChainLoader::getLoaders()
  * removed duplicated directory separator in FilesystemLoader
  * deprecated the "base_template_class" option on Twig\Environment
- * deprecated the ``Twig\Environment::getBaseTemplateClass()`` and
-   ``Twig\Environment::setBaseTemplateClass()`` methods
+ * deprecated the Twig\Environment::getBaseTemplateClass() and
+   Twig\Environment::setBaseTemplateClass() methods
  * changed internal code to use the namespaced classes as much as possible
  * deprecated Twig_Parser::isReservedMacroName()
 

doc/deprecated.rst

@@ -60,3 +60,20 @@ Environment
 * As of Twig 2.7, the ``Twig\Environment::getBaseTemplateClass()`` and
   ``Twig\Environment::setBaseTemplateClass()`` methods are deprecated and will
   be removed in Twig 3.0.
+
+Interfaces
+----------
+
+* As of Twig 2.7, the empty ``Twig\Loader\ExistsLoaderInterface`` interface is
+  deprecated and will be removed in Twig 3.0.
+
+* As of Twig 2.7, the ``Twig\Extension\InitRuntimeInterface`` interface is
+  deprecated and will be removed in Twig 3.0.
+
+Miscellaneous
+-------------
+
+* As of Twig 2.7, the ``Twig_SimpleFilter``, ``Twig_SimpleFunction``, and
+  ``Twig_SimpleTest`` empty classes are deprecated and will be removed in Twig
+  3.0. Use ``Twig\TwigFilter``, ``Twig\TwigFunction``, and ``Twig\TwigTest``
+  respectively.

lib/Twig/SimpleFilter.php

@@ -16,7 +16,10 @@ use Twig\TwigFilter;
  */
 class_exists(TwigFilter::class);
 
+@trigger_error(sprintf('Using the "Twig_SimpleFilter" class is deprecated since Twig version 2.7, use "Twig\TwigFilter" instead.'), E_USER_DEPRECATED);
+
 if (false) {
+    /** @deprecated since Twig 2.7, use "Twig\TwigFilter" instead */
     final class Twig_SimpleFilter extends TwigFilter
     {
     }

lib/Twig/SimpleFunction.php

@@ -16,7 +16,10 @@ use Twig\TwigFunction;
  */
 class_exists(TwigFunction::class);
 
+@trigger_error(sprintf('Using the "Twig_SimpleFunction" class is deprecated since Twig version 2.7, use "Twig\TwigFunction" instead.'), E_USER_DEPRECATED);
+
 if (false) {
+    /** @deprecated since Twig 2.7, use "Twig\TwigFunction" instead */
     final class Twig_SimpleFunction extends TwigFunction
     {
     }

lib/Twig/SimpleTest.php

@@ -16,7 +16,10 @@ use Twig\TwigTest;
  */
 class_exists(TwigTest::class);
 
+@trigger_error(sprintf('Using the "Twig_SimpleTest" class is deprecated since Twig version 2.7, use "Twig\TwigTest" instead.'), E_USER_DEPRECATED);
+
 if (false) {
+    /** @deprecated since Twig 2.7, use "Twig\TwigTest" instead */
     final class Twig_SimpleTest extends TwigTest
     {
     }

src/Extension/InitRuntimeInterface.php

@@ -20,6 +20,8 @@ use Twig\Environment;
  * deprecated initRuntime() method in your extensions.
  *
  * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since version 2.7, to be removed in 3.0
  */
 interface InitRuntimeInterface
 {

src/ExtensionSet.php

@@ -60,6 +60,8 @@ final class ExtensionSet
 
         foreach ($this->extensions as $extension) {
             if ($extension instanceof InitRuntimeInterface) {
+                @trigger_error(sprintf('Implementing \Twig\Extension\InitRuntimeInterface on "%s" is deprecated since Twig 2.7 as the interface will be removed in 3.0.', get_class($extension)), E_USER_DEPRECATED);
+
                 $extension->initRuntime($env);
             }
         }

src/Loader/ExistsLoaderInterface.php

@@ -13,6 +13,8 @@ namespace Twig\Loader;
 
 /**
  * Empty interface for Twig 1.x compatibility.
+ *
+ * @deprecated since version 2.7, to be removed in 3.0
  */
 interface ExistsLoaderInterface extends LoaderInterface
 {

test/Twig/Tests/EnvironmentTest.php

@@ -308,6 +308,9 @@ class Twig_Tests_EnvironmentTest extends \PHPUnit\Framework\TestCase
         $this->assertTrue($twig->isTemplateFresh('page', time()));
     }
 
+    /**
+     * @group legacy
+     */
     public function testInitRuntimeWithAnExtensionUsingInitRuntimeNoDeprecation()
     {
         $loader = $this->getMockBuilder(LoaderInterface::class)->getMock();