[2.x] Add namespaced aliases

lib/Twig/ExtensionSet.php

@@ -469,3 +469,5 @@ private function initExtension(Twig_ExtensionInterface $extension)
         }
     }
 }
+
+class_alias('Twig_ExtensionSet', 'Twig\ExtensionSet', false);

lib/Twig/Filter.php

@@ -138,3 +138,5 @@ public function getAlternative()
 
 // For Twig 1.x compatibility
 class_alias('Twig_Filter', 'Twig_SimpleFilter', false);
+
+class_alias('Twig_Filter', 'Twig\TwigFilter', false);

lib/Twig/Function.php

@@ -128,3 +128,5 @@ public function getAlternative()
 
 // For Twig 1.x compatibility
 class_alias('Twig_Function', 'Twig_SimpleFunction', false);
+
+class_alias('Twig_Function', 'Twig\TwigFunction', false);

lib/Twig/Test.php

@@ -90,3 +90,5 @@ public function getAlternative()
 
 // For Twig 1.x compatibility
 class_alias('Twig_Test', 'Twig_SimpleTest', false);
+
+class_alias('Twig_Test', 'Twig\TwigTest', false);

src/ExtensionSet.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Twig;
+
+require __DIR__.'/../lib/Twig/ExtensionSet.php';
+
+if (\false) {
+    class ExtensionSet extends \Twig_ExtensionSet
+    {
+    }
+}

src/TwigFilter.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Twig;
+
+require __DIR__.'/../lib/Twig/Filter.php';
+
+if (\false) {
+    class TwigFilter extends \Twig_Filter
+    {
+    }
+}

src/TwigFunction.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Twig;
+
+require __DIR__.'/../lib/Twig/Function.php';
+
+if (\false) {
+    class TwigFunction extends \Twig_Function
+    {
+    }
+}

src/TwigTest.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Twig;
+
+require __DIR__.'/../lib/Twig/Test.php';
+
+if (\false) {
+    class TwigTest extends \Twig_Test
+    {
+    }
+}