Twig update to latest Twig 1.x legacy as per vichan

78 files changed, 1125 insertions, 522 deletions

diff --git a/inc/lib/Twig/Node/AutoEscape.php b/inc/lib/Twig/Node/AutoEscape.php
index 8f190e0b..17e4e381 100644
--- a/inc/lib/Twig/Node/AutoEscape.php
+++ b/inc/lib/Twig/Node/AutoEscape.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -27,13 +27,10 @@ class Twig_Node_AutoEscape extends Twig_Node
         parent::__construct(array('body' => $body), array('value' => $value), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler->subcompile($this->getNode('body'));
     }
 }
+
+class_alias('Twig_Node_AutoEscape', 'Twig\Node\AutoEscapeNode', false);
diff --git a/inc/lib/Twig/Node/Block.php b/inc/lib/Twig/Node/Block.php
index 50eb67ed..91752ad2 100644
--- a/inc/lib/Twig/Node/Block.php
+++ b/inc/lib/Twig/Node/Block.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -22,11 +22,6 @@ class Twig_Node_Block extends Twig_Node
         parent::__construct(array('body' => $body), array('name' => $name), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -42,3 +37,5 @@ class Twig_Node_Block extends Twig_Node
         ;
     }
 }
+
+class_alias('Twig_Node_Block', 'Twig\Node\BlockNode', false);
diff --git a/inc/lib/Twig/Node/BlockReference.php b/inc/lib/Twig/Node/BlockReference.php
index 013e369e..92a9f398 100644
--- a/inc/lib/Twig/Node/BlockReference.php
+++ b/inc/lib/Twig/Node/BlockReference.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -22,11 +22,6 @@ class Twig_Node_BlockReference extends Twig_Node implements Twig_NodeOutputInter
         parent::__construct(array(), array('name' => $name), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -35,3 +30,5 @@ class Twig_Node_BlockReference extends Twig_Node implements Twig_NodeOutputInter
         ;
     }
 }
+
+class_alias('Twig_Node_BlockReference', 'Twig\Node\BlockReferenceNode', false);
diff --git a/inc/lib/Twig/Node/Body.php b/inc/lib/Twig/Node/Body.php
index 3ffb1342..07dfef8b 100644
--- a/inc/lib/Twig/Node/Body.php
+++ b/inc/lib/Twig/Node/Body.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -17,3 +17,5 @@
 class Twig_Node_Body extends Twig_Node
 {
 }
+
+class_alias('Twig_Node_Body', 'Twig\Node\BodyNode', false);
diff --git a/inc/lib/Twig/Node/CheckSecurity.php b/inc/lib/Twig/Node/CheckSecurity.php
new file mode 100644
index 00000000..7258acb6
--- /dev/null
+++ b/inc/lib/Twig/Node/CheckSecurity.php
@@ -0,0 +1,80 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_CheckSecurity extends Twig_Node
+{
+    protected $usedFilters;
+    protected $usedTags;
+    protected $usedFunctions;
+
+    public function __construct(array $usedFilters, array $usedTags, array $usedFunctions)
+    {
+        $this->usedFilters = $usedFilters;
+        $this->usedTags = $usedTags;
+        $this->usedFunctions = $usedFunctions;
+
+        parent::__construct();
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $tags = $filters = $functions = array();
+        foreach (array('tags', 'filters', 'functions') as $type) {
+            foreach ($this->{'used'.ucfirst($type)} as $name => $node) {
+                if ($node instanceof Twig_Node) {
+                    ${$type}[$name] = $node->getTemplateLine();
+                } else {
+                    ${$type}[$node] = null;
+                }
+            }
+        }
+
+        $compiler
+            ->write('$tags = ')->repr(array_filter($tags))->raw(";\n")
+            ->write('$filters = ')->repr(array_filter($filters))->raw(";\n")
+            ->write('$functions = ')->repr(array_filter($functions))->raw(";\n\n")
+            ->write("try {\n")
+            ->indent()
+            ->write("\$this->env->getExtension('Twig_Extension_Sandbox')->checkSecurity(\n")
+            ->indent()
+            ->write(!$tags ? "array(),\n" : "array('".implode("', '", array_keys($tags))."'),\n")
+            ->write(!$filters ? "array(),\n" : "array('".implode("', '", array_keys($filters))."'),\n")
+            ->write(!$functions ? "array()\n" : "array('".implode("', '", array_keys($functions))."')\n")
+            ->outdent()
+            ->write(");\n")
+            ->outdent()
+            ->write("} catch (Twig_Sandbox_SecurityError \$e) {\n")
+            ->indent()
+            ->write("\$e->setSourceContext(\$this->getSourceContext());\n\n")
+            ->write("if (\$e instanceof Twig_Sandbox_SecurityNotAllowedTagError && isset(\$tags[\$e->getTagName()])) {\n")
+            ->indent()
+            ->write("\$e->setTemplateLine(\$tags[\$e->getTagName()]);\n")
+            ->outdent()
+            ->write("} elseif (\$e instanceof Twig_Sandbox_SecurityNotAllowedFilterError && isset(\$filters[\$e->getFilterName()])) {\n")
+            ->indent()
+            ->write("\$e->setTemplateLine(\$filters[\$e->getFilterName()]);\n")
+            ->outdent()
+            ->write("} elseif (\$e instanceof Twig_Sandbox_SecurityNotAllowedFunctionError && isset(\$functions[\$e->getFunctionName()])) {\n")
+            ->indent()
+            ->write("\$e->setTemplateLine(\$functions[\$e->getFunctionName()]);\n")
+            ->outdent()
+            ->write("}\n\n")
+            ->write("throw \$e;\n")
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+}
+
+class_alias('Twig_Node_CheckSecurity', 'Twig\Node\CheckSecurityNode', false);
diff --git a/inc/lib/Twig/Node/Do.php b/inc/lib/Twig/Node/Do.php
index c528066b..cdd7e77a 100644
--- a/inc/lib/Twig/Node/Do.php
+++ b/inc/lib/Twig/Node/Do.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -21,11 +21,6 @@ class Twig_Node_Do extends Twig_Node
         parent::__construct(array('expr' => $expr), array(), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -36,3 +31,5 @@ class Twig_Node_Do extends Twig_Node
         ;
     }
 }
+
+class_alias('Twig_Node_Do', 'Twig\Node\DoNode', false);
diff --git a/inc/lib/Twig/Node/Embed.php b/inc/lib/Twig/Node/Embed.php
index 4c9456dc..3785d3a9 100644
--- a/inc/lib/Twig/Node/Embed.php
+++ b/inc/lib/Twig/Node/Embed.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2012 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -17,22 +17,30 @@
 class Twig_Node_Embed extends Twig_Node_Include
 {
     // we don't inject the module to avoid node visitors to traverse it twice (as it will be already visited in the main module)
-    public function __construct($filename, $index, Twig_Node_Expression $variables = null, $only = false, $ignoreMissing = false, $lineno, $tag = null)
+    public function __construct($name, $index, Twig_Node_Expression $variables = null, $only = false, $ignoreMissing = false, $lineno, $tag = null)
     {
         parent::__construct(new Twig_Node_Expression_Constant('not_used', $lineno), $variables, $only, $ignoreMissing, $lineno, $tag);
 
-        $this->setAttribute('filename', $filename);
+        $this->setAttribute('name', $name);
+        // to be removed in 2.0, used name instead
+        $this->setAttribute('filename', $name);
         $this->setAttribute('index', $index);
     }
 
     protected function addGetTemplate(Twig_Compiler $compiler)
     {
         $compiler
-            ->write("\$this->env->loadTemplate(")
-            ->string($this->getAttribute('filename'))
+            ->write('$this->loadTemplate(')
+            ->string($this->getAttribute('name'))
+            ->raw(', ')
+            ->repr($this->getTemplateName())
+            ->raw(', ')
+            ->repr($this->getTemplateLine())
             ->raw(', ')
             ->string($this->getAttribute('index'))
-            ->raw(")")
+            ->raw(')')
         ;
     }
 }
+
+class_alias('Twig_Node_Embed', 'Twig\Node\EmbedNode', false);
diff --git a/inc/lib/Twig/Node/Expression.php b/inc/lib/Twig/Node/Expression.php
index a7382e7d..a99c4e63 100644
--- a/inc/lib/Twig/Node/Expression.php
+++ b/inc/lib/Twig/Node/Expression.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -18,3 +18,5 @@
 abstract class Twig_Node_Expression extends Twig_Node
 {
 }
+
+class_alias('Twig_Node_Expression', 'Twig\Node\Expression\AbstractExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/Array.php b/inc/lib/Twig/Node/Expression/Array.php
index 1da785fe..0e77bb08 100644
--- a/inc/lib/Twig/Node/Expression/Array.php
+++ b/inc/lib/Twig/Node/Expression/Array.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -43,7 +43,7 @@ class Twig_Node_Expression_Array extends Twig_Node_Expression
         foreach ($this->getKeyValuePairs() as $pair) {
             // we compare the string representation of the keys
             // to avoid comparing the line numbers which are not relevant here.
-            if ((string) $key == (string) $pair['key']) {
+            if ((string) $key === (string) $pair['key']) {
                 return true;
             }
         }
@@ -54,17 +54,12 @@ class Twig_Node_Expression_Array extends Twig_Node_Expression
     public function addElement(Twig_Node_Expression $value, Twig_Node_Expression $key = null)
     {
         if (null === $key) {
-            $key = new Twig_Node_Expression_Constant(++$this->index, $value->getLine());
+            $key = new Twig_Node_Expression_Constant(++$this->index, $value->getTemplateLine());
         }
 
         array_push($this->nodes, $key, $value);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler->raw('array(');
@@ -84,3 +79,5 @@ class Twig_Node_Expression_Array extends Twig_Node_Expression
         $compiler->raw(')');
     }
 }
+
+class_alias('Twig_Node_Expression_Array', 'Twig\Node\Expression\ArrayExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/AssignName.php b/inc/lib/Twig/Node/Expression/AssignName.php
index 2ddea78c..2e6b4c7c 100644
--- a/inc/lib/Twig/Node/Expression/AssignName.php
+++ b/inc/lib/Twig/Node/Expression/AssignName.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -12,11 +12,6 @@
 
 class Twig_Node_Expression_AssignName extends Twig_Node_Expression_Name
 {
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -26,3 +21,5 @@ class Twig_Node_Expression_AssignName extends Twig_Node_Expression_Name
         ;
     }
 }
+
+class_alias('Twig_Node_Expression_AssignName', 'Twig\Node\Expression\AssignNameExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary.php b/inc/lib/Twig/Node/Expression/Binary.php
index 9dd5de2c..2b545d98 100644
--- a/inc/lib/Twig/Node/Expression/Binary.php
+++ b/inc/lib/Twig/Node/Expression/Binary.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,11 +16,6 @@ abstract class Twig_Node_Expression_Binary extends Twig_Node_Expression
         parent::__construct(array('left' => $left, 'right' => $right), array(), $lineno);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -38,3 +33,5 @@ abstract class Twig_Node_Expression_Binary extends Twig_Node_Expression
 
     abstract public function operator(Twig_Compiler $compiler);
 }
+
+class_alias('Twig_Node_Expression_Binary', 'Twig\Node\Expression\Binary\AbstractBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Add.php b/inc/lib/Twig/Node/Expression/Binary/Add.php
index 0ef8e117..5a09d836 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Add.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Add.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_Add extends Twig_Node_Expression_Binary
         return $compiler->raw('+');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Add', 'Twig\Node\Expression\Binary\AddBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/And.php b/inc/lib/Twig/Node/Expression/Binary/And.php
index d5752ebb..9ffddce6 100644
--- a/inc/lib/Twig/Node/Expression/Binary/And.php
+++ b/inc/lib/Twig/Node/Expression/Binary/And.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_And extends Twig_Node_Expression_Binary
         return $compiler->raw('&&');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_And', 'Twig\Node\Expression\Binary\AndBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/BitwiseAnd.php b/inc/lib/Twig/Node/Expression/Binary/BitwiseAnd.php
index 9a46d845..e46e9ebf 100644
--- a/inc/lib/Twig/Node/Expression/Binary/BitwiseAnd.php
+++ b/inc/lib/Twig/Node/Expression/Binary/BitwiseAnd.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_BitwiseAnd extends Twig_Node_Expression_Binary
         return $compiler->raw('&');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_BitwiseAnd', 'Twig\Node\Expression\Binary\BitwiseAndBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/BitwiseOr.php b/inc/lib/Twig/Node/Expression/Binary/BitwiseOr.php
index 058a20bf..5d7f1b7c 100644
--- a/inc/lib/Twig/Node/Expression/Binary/BitwiseOr.php
+++ b/inc/lib/Twig/Node/Expression/Binary/BitwiseOr.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_BitwiseOr extends Twig_Node_Expression_Binary
         return $compiler->raw('|');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_BitwiseOr', 'Twig\Node\Expression\Binary\BitwiseOrBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/BitwiseXor.php b/inc/lib/Twig/Node/Expression/Binary/BitwiseXor.php
index f4da73d4..82edf516 100644
--- a/inc/lib/Twig/Node/Expression/Binary/BitwiseXor.php
+++ b/inc/lib/Twig/Node/Expression/Binary/BitwiseXor.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_BitwiseXor extends Twig_Node_Expression_Binary
         return $compiler->raw('^');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_BitwiseXor', 'Twig\Node\Expression\Binary\BitwiseXorBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Concat.php b/inc/lib/Twig/Node/Expression/Binary/Concat.php
index f9a64627..91abca60 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Concat.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Concat.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_Concat extends Twig_Node_Expression_Binary
         return $compiler->raw('.');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Concat', 'Twig\Node\Expression\Binary\ConcatBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Div.php b/inc/lib/Twig/Node/Expression/Binary/Div.php
index e0797a61..38ffa30c 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Div.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Div.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_Div extends Twig_Node_Expression_Binary
         return $compiler->raw('/');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Div', 'Twig\Node\Expression\Binary\DivBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/EndsWith.php b/inc/lib/Twig/Node/Expression/Binary/EndsWith.php
new file mode 100644
index 00000000..85c52937
--- /dev/null
+++ b/inc/lib/Twig/Node/Expression/Binary/EndsWith.php
@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_EndsWith extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $left = $compiler->getVarName();
+        $right = $compiler->getVarName();
+        $compiler
+            ->raw(sprintf('(is_string($%s = ', $left))
+            ->subcompile($this->getNode('left'))
+            ->raw(sprintf(') && is_string($%s = ', $right))
+            ->subcompile($this->getNode('right'))
+            ->raw(sprintf(') && (\'\' === $%2$s || $%2$s === substr($%1$s, -strlen($%2$s))))', $left, $right))
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('');
+    }
+}
+
+class_alias('Twig_Node_Expression_Binary_EndsWith', 'Twig\Node\Expression\Binary\EndsWithBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Equal.php b/inc/lib/Twig/Node/Expression/Binary/Equal.php
index 7b1236d0..a6a6946b 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Equal.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Equal.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -15,3 +15,5 @@ class Twig_Node_Expression_Binary_Equal extends Twig_Node_Expression_Binary
         return $compiler->raw('==');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Equal', 'Twig\Node\Expression\Binary\EqualBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/FloorDiv.php b/inc/lib/Twig/Node/Expression/Binary/FloorDiv.php
index 7fbd0556..7393bcb8 100644
--- a/inc/lib/Twig/Node/Expression/Binary/FloorDiv.php
+++ b/inc/lib/Twig/Node/Expression/Binary/FloorDiv.php
@@ -3,23 +3,18 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 class Twig_Node_Expression_Binary_FloorDiv extends Twig_Node_Expression_Binary
 {
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
-        $compiler->raw('intval(floor(');
+        $compiler->raw('(int) floor(');
         parent::compile($compiler);
-        $compiler->raw('))');
+        $compiler->raw(')');
     }
 
     public function operator(Twig_Compiler $compiler)
@@ -27,3 +22,5 @@ class Twig_Node_Expression_Binary_FloorDiv extends Twig_Node_Expression_Binary
         return $compiler->raw('/');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_FloorDiv', 'Twig\Node\Expression\Binary\FloorDivBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Greater.php b/inc/lib/Twig/Node/Expression/Binary/Greater.php
index a110bd92..832f9797 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Greater.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Greater.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -15,3 +15,5 @@ class Twig_Node_Expression_Binary_Greater extends Twig_Node_Expression_Binary
         return $compiler->raw('>');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Greater', 'Twig\Node\Expression\Binary\GreaterBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/GreaterEqual.php b/inc/lib/Twig/Node/Expression/Binary/GreaterEqual.php
index 3754fed2..c5f76245 100644
--- a/inc/lib/Twig/Node/Expression/Binary/GreaterEqual.php
+++ b/inc/lib/Twig/Node/Expression/Binary/GreaterEqual.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -15,3 +15,5 @@ class Twig_Node_Expression_Binary_GreaterEqual extends Twig_Node_Expression_Bina
         return $compiler->raw('>=');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_GreaterEqual', 'Twig\Node\Expression\Binary\GreaterEqualBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/In.php b/inc/lib/Twig/Node/Expression/Binary/In.php
index 788f9377..af112448 100644
--- a/inc/lib/Twig/Node/Expression/Binary/In.php
+++ b/inc/lib/Twig/Node/Expression/Binary/In.php
@@ -3,18 +3,13 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 class Twig_Node_Expression_Binary_In extends Twig_Node_Expression_Binary
 {
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -31,3 +26,5 @@ class Twig_Node_Expression_Binary_In extends Twig_Node_Expression_Binary
         return $compiler->raw('in');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_In', 'Twig\Node\Expression\Binary\InBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Less.php b/inc/lib/Twig/Node/Expression/Binary/Less.php
index 45fd3004..ab8fc1f9 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Less.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Less.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -15,3 +15,5 @@ class Twig_Node_Expression_Binary_Less extends Twig_Node_Expression_Binary
         return $compiler->raw('<');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Less', 'Twig\Node\Expression\Binary\LessBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/LessEqual.php b/inc/lib/Twig/Node/Expression/Binary/LessEqual.php
index e38e257c..71a279e9 100644
--- a/inc/lib/Twig/Node/Expression/Binary/LessEqual.php
+++ b/inc/lib/Twig/Node/Expression/Binary/LessEqual.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -15,3 +15,5 @@ class Twig_Node_Expression_Binary_LessEqual extends Twig_Node_Expression_Binary
         return $compiler->raw('<=');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_LessEqual', 'Twig\Node\Expression\Binary\LessEqualBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Matches.php b/inc/lib/Twig/Node/Expression/Binary/Matches.php
new file mode 100644
index 00000000..5cb85584
--- /dev/null
+++ b/inc/lib/Twig/Node/Expression/Binary/Matches.php
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Matches extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('preg_match(')
+            ->subcompile($this->getNode('right'))
+            ->raw(', ')
+            ->subcompile($this->getNode('left'))
+            ->raw(')')
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('');
+    }
+}
+
+class_alias('Twig_Node_Expression_Binary_Matches', 'Twig\Node\Expression\Binary\MatchesBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Mod.php b/inc/lib/Twig/Node/Expression/Binary/Mod.php
index 9924114f..28109633 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Mod.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Mod.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_Mod extends Twig_Node_Expression_Binary
         return $compiler->raw('%');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Mod', 'Twig\Node\Expression\Binary\ModBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Mul.php b/inc/lib/Twig/Node/Expression/Binary/Mul.php
index c91529ca..790c6a22 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Mul.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Mul.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_Mul extends Twig_Node_Expression_Binary
         return $compiler->raw('*');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Mul', 'Twig\Node\Expression\Binary\MulBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/NotEqual.php b/inc/lib/Twig/Node/Expression/Binary/NotEqual.php
index 26867ba2..bb45c9ed 100644
--- a/inc/lib/Twig/Node/Expression/Binary/NotEqual.php
+++ b/inc/lib/Twig/Node/Expression/Binary/NotEqual.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -15,3 +15,5 @@ class Twig_Node_Expression_Binary_NotEqual extends Twig_Node_Expression_Binary
         return $compiler->raw('!=');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_NotEqual', 'Twig\Node\Expression\Binary\NotEqualBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/NotIn.php b/inc/lib/Twig/Node/Expression/Binary/NotIn.php
index f347b7b6..9dedf92f 100644
--- a/inc/lib/Twig/Node/Expression/Binary/NotIn.php
+++ b/inc/lib/Twig/Node/Expression/Binary/NotIn.php
@@ -3,18 +3,13 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 class Twig_Node_Expression_Binary_NotIn extends Twig_Node_Expression_Binary
 {
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -31,3 +26,5 @@ class Twig_Node_Expression_Binary_NotIn extends Twig_Node_Expression_Binary
         return $compiler->raw('not in');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_NotIn', 'Twig\Node\Expression\Binary\NotInBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Or.php b/inc/lib/Twig/Node/Expression/Binary/Or.php
index adba49c6..dc9eece1 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Or.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Or.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_Or extends Twig_Node_Expression_Binary
         return $compiler->raw('||');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Or', 'Twig\Node\Expression\Binary\OrBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Power.php b/inc/lib/Twig/Node/Expression/Binary/Power.php
index b2c59040..d24777bd 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Power.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Power.php
@@ -3,20 +3,19 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 class Twig_Node_Expression_Binary_Power extends Twig_Node_Expression_Binary
 {
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
+        if (PHP_VERSION_ID >= 50600) {
+            return parent::compile($compiler);
+        }
+
         $compiler
             ->raw('pow(')
             ->subcompile($this->getNode('left'))
@@ -31,3 +30,5 @@ class Twig_Node_Expression_Binary_Power extends Twig_Node_Expression_Binary
         return $compiler->raw('**');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Power', 'Twig\Node\Expression\Binary\PowerBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Range.php b/inc/lib/Twig/Node/Expression/Binary/Range.php
index bea4f2a6..187f6765 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Range.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Range.php
@@ -3,18 +3,13 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 class Twig_Node_Expression_Binary_Range extends Twig_Node_Expression_Binary
 {
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -31,3 +26,5 @@ class Twig_Node_Expression_Binary_Range extends Twig_Node_Expression_Binary
         return $compiler->raw('..');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Range', 'Twig\Node\Expression\Binary\RangeBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/StartsWith.php b/inc/lib/Twig/Node/Expression/Binary/StartsWith.php
new file mode 100644
index 00000000..7e43b8de
--- /dev/null
+++ b/inc/lib/Twig/Node/Expression/Binary/StartsWith.php
@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_StartsWith extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $left = $compiler->getVarName();
+        $right = $compiler->getVarName();
+        $compiler
+            ->raw(sprintf('(is_string($%s = ', $left))
+            ->subcompile($this->getNode('left'))
+            ->raw(sprintf(') && is_string($%s = ', $right))
+            ->subcompile($this->getNode('right'))
+            ->raw(sprintf(') && (\'\' === $%2$s || 0 === strpos($%1$s, $%2$s)))', $left, $right))
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('');
+    }
+}
+
+class_alias('Twig_Node_Expression_Binary_StartsWith', 'Twig\Node\Expression\Binary\StartsWithBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/Binary/Sub.php b/inc/lib/Twig/Node/Expression/Binary/Sub.php
index d4463991..cff8ed07 100644
--- a/inc/lib/Twig/Node/Expression/Binary/Sub.php
+++ b/inc/lib/Twig/Node/Expression/Binary/Sub.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Binary_Sub extends Twig_Node_Expression_Binary
         return $compiler->raw('-');
     }
 }
+
+class_alias('Twig_Node_Expression_Binary_Sub', 'Twig\Node\Expression\Binary\SubBinary', false);
diff --git a/inc/lib/Twig/Node/Expression/BlockReference.php b/inc/lib/Twig/Node/Expression/BlockReference.php
index 647196eb..37a3983d 100644
--- a/inc/lib/Twig/Node/Expression/BlockReference.php
+++ b/inc/lib/Twig/Node/Expression/BlockReference.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -17,35 +17,77 @@
  */
 class Twig_Node_Expression_BlockReference extends Twig_Node_Expression
 {
-    public function __construct(Twig_NodeInterface $name, $asString = false, $lineno, $tag = null)
+    /**
+     * @param Twig_Node|null $template
+     */
+    public function __construct(Twig_NodeInterface $name, $template = null, $lineno, $tag = null)
     {
-        parent::__construct(array('name' => $name), array('as_string' => $asString, 'output' => false), $lineno, $tag);
+        if (is_bool($template)) {
+            @trigger_error(sprintf('The %s method "$asString" argument is deprecated since version 1.28 and will be removed in 2.0.', __METHOD__), E_USER_DEPRECATED);
+
+            $template = null;
+        }
+
+        $nodes = array('name' => $name);
+        if (null !== $template) {
+            $nodes['template'] = $template;
+        }
+
+        parent::__construct($nodes, array('is_defined_test' => false, 'output' => false), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
-        if ($this->getAttribute('as_string')) {
-            $compiler->raw('(string) ');
+        if ($this->getAttribute('is_defined_test')) {
+            $this->compileTemplateCall($compiler, 'hasBlock');
+        } else {
+            if ($this->getAttribute('output')) {
+                $compiler->addDebugInfo($this);
+
+                $this
+                    ->compileTemplateCall($compiler, 'displayBlock')
+                    ->raw(";\n");
+            } else {
+                $this->compileTemplateCall($compiler, 'renderBlock');
+            }
         }
+    }
 
-        if ($this->getAttribute('output')) {
-            $compiler
-                ->addDebugInfo($this)
-                ->write("\$this->displayBlock(")
-                ->subcompile($this->getNode('name'))
-                ->raw(", \$context, \$blocks);\n")
-            ;
+    private function compileTemplateCall(Twig_Compiler $compiler, $method)
+    {
+        if (!$this->hasNode('template')) {
+            $compiler->write('$this');
         } else {
             $compiler
-                ->raw("\$this->renderBlock(")
-                ->subcompile($this->getNode('name'))
-                ->raw(", \$context, \$blocks)")
+                ->write('$this->loadTemplate(')
+                ->subcompile($this->getNode('template'))
+                ->raw(', ')
+                ->repr($this->getTemplateName())
+                ->raw(', ')
+                ->repr($this->getTemplateLine())
+                ->raw(')')
             ;
         }
+
+        $compiler->raw(sprintf('->%s', $method));
+        $this->compileBlockArguments($compiler);
+
+        return $compiler;
+    }
+
+    private function compileBlockArguments(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('name'))
+            ->raw(', $context');
+
+        if (!$this->hasNode('template')) {
+            $compiler->raw(', $blocks');
+        }
+
+        return $compiler->raw(')');
     }
 }
+
+class_alias('Twig_Node_Expression_BlockReference', 'Twig\Node\Expression\BlockReferenceExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/Call.php b/inc/lib/Twig/Node/Expression/Call.php
index dba9b0e6..d962b6a5 100644
--- a/inc/lib/Twig/Node/Expression/Call.php
+++ b/inc/lib/Twig/Node/Expression/Call.php
@@ -3,27 +3,36 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2012 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 abstract class Twig_Node_Expression_Call extends Twig_Node_Expression
 {
+    private $reflector;
+
     protected function compileCallable(Twig_Compiler $compiler)
     {
-        $callable = $this->getAttribute('callable');
-
         $closingParenthesis = false;
-        if ($callable) {
-            if (is_string($callable)) {
+        if ($this->hasAttribute('callable') && $callable = $this->getAttribute('callable')) {
+            if (is_string($callable) && false === strpos($callable, '::')) {
                 $compiler->raw($callable);
-            } elseif (is_array($callable) && $callable[0] instanceof Twig_ExtensionInterface) {
-                $compiler->raw(sprintf('$this->env->getExtension(\'%s\')->%s', $callable[0]->getName(), $callable[1]));
             } else {
-                $type = ucfirst($this->getAttribute('type'));
-                $compiler->raw(sprintf('call_user_func_array($this->env->get%s(\'%s\')->getCallable(), array', $type, $this->getAttribute('name')));
-                $closingParenthesis = true;
+                list($r, $callable) = $this->reflectCallable($callable);
+                if ($r instanceof ReflectionMethod && is_string($callable[0])) {
+                    if ($r->isStatic()) {
+                        $compiler->raw(sprintf('%s::%s', $callable[0], $callable[1]));
+                    } else {
+                        $compiler->raw(sprintf('$this->env->getRuntime(\'%s\')->%s', $callable[0], $callable[1]));
+                    }
+                } elseif ($r instanceof ReflectionMethod && $callable[0] instanceof Twig_ExtensionInterface) {
+                    $compiler->raw(sprintf('$this->env->getExtension(\'%s\')->%s', get_class($callable[0]), $callable[1]));
+                } else {
+                    $type = ucfirst($this->getAttribute('type'));
+                    $compiler->raw(sprintf('call_user_func_array($this->env->get%s(\'%s\')->getCallable(), array', $type, $this->getAttribute('name')));
+                    $closingParenthesis = true;
+                }
             }
         } else {
             $compiler->raw($this->getAttribute('thing')->compile());
@@ -73,7 +82,7 @@ abstract class Twig_Node_Expression_Call extends Twig_Node_Expression
             $first = false;
         }
 
-        if ($this->hasNode('arguments') && null !== $this->getNode('arguments')) {
+        if ($this->hasNode('arguments')) {
             $callable = $this->hasAttribute('callable') ? $this->getAttribute('callable') : null;
 
             $arguments = $this->getArguments($callable, $this->getNode('arguments'));
@@ -92,6 +101,9 @@ abstract class Twig_Node_Expression_Call extends Twig_Node_Expression
 
     protected function getArguments($callable, $arguments)
     {
+        $callType = $this->getAttribute('type');
+        $callName = $this->getAttribute('name');
+
         $parameters = array();
         $named = false;
         foreach ($arguments as $name => $node) {
@@ -99,73 +111,101 @@ abstract class Twig_Node_Expression_Call extends Twig_Node_Expression
                 $named = true;
                 $name = $this->normalizeName($name);
             } elseif ($named) {
-                throw new Twig_Error_Syntax(sprintf('Positional arguments cannot be used after named arguments for %s "%s".', $this->getAttribute('type'), $this->getAttribute('name')));
+                throw new Twig_Error_Syntax(sprintf('Positional arguments cannot be used after named arguments for %s "%s".', $callType, $callName));
             }
 
             $parameters[$name] = $node;
         }
 
-        if (!$named) {
+        $isVariadic = $this->hasAttribute('is_variadic') && $this->getAttribute('is_variadic');
+        if (!$named && !$isVariadic) {
             return $parameters;
         }
 
         if (!$callable) {
-            throw new LogicException(sprintf('Named arguments are not supported for %s "%s".', $this->getAttribute('type'), $this->getAttribute('name')));
-        }
-
-        // manage named arguments
-        if (is_array($callable)) {
-            $r = new ReflectionMethod($callable[0], $callable[1]);
-        } elseif (is_object($callable) && !$callable instanceof Closure) {
-            $r = new ReflectionObject($callable);
-            $r = $r->getMethod('__invoke');
-        } else {
-            $r = new ReflectionFunction($callable);
-        }
-
-        $definition = $r->getParameters();
-        if ($this->hasNode('node')) {
-            array_shift($definition);
-        }
-        if ($this->hasAttribute('needs_environment') && $this->getAttribute('needs_environment')) {
-            array_shift($definition);
-        }
-        if ($this->hasAttribute('needs_context') && $this->getAttribute('needs_context')) {
-            array_shift($definition);
-        }
-        if ($this->hasAttribute('arguments') && null !== $this->getAttribute('arguments')) {
-            foreach ($this->getAttribute('arguments') as $argument) {
-                array_shift($definition);
+            if ($named) {
+                $message = sprintf('Named arguments are not supported for %s "%s".', $callType, $callName);
+            } else {
+                $message = sprintf('Arbitrary positional arguments are not supported for %s "%s".', $callType, $callName);
             }
+
+            throw new LogicException($message);
         }
 
+        $callableParameters = $this->getCallableParameters($callable, $isVariadic);
         $arguments = array();
+        $names = array();
+        $missingArguments = array();
+        $optionalArguments = array();
         $pos = 0;
-        foreach ($definition as $param) {
-            $name = $this->normalizeName($param->name);
+        foreach ($callableParameters as $callableParameter) {
+            $names[] = $name = $this->normalizeName($callableParameter->name);
 
             if (array_key_exists($name, $parameters)) {
                 if (array_key_exists($pos, $parameters)) {
-                    throw new Twig_Error_Syntax(sprintf('Argument "%s" is defined twice for %s "%s".', $name, $this->getAttribute('type'), $this->getAttribute('name')));
+                    throw new Twig_Error_Syntax(sprintf('Argument "%s" is defined twice for %s "%s".', $name, $callType, $callName));
+                }
+
+                if (count($missingArguments)) {
+                    throw new Twig_Error_Syntax(sprintf(
+                        'Argument "%s" could not be assigned for %s "%s(%s)" because it is mapped to an internal PHP function which cannot determine default value for optional argument%s "%s".',
+                        $name, $callType, $callName, implode(', ', $names), count($missingArguments) > 1 ? 's' : '', implode('", "', $missingArguments))
+                    );
                 }
 
+                $arguments = array_merge($arguments, $optionalArguments);
                 $arguments[] = $parameters[$name];
                 unset($parameters[$name]);
+                $optionalArguments = array();
             } elseif (array_key_exists($pos, $parameters)) {
+                $arguments = array_merge($arguments, $optionalArguments);
                 $arguments[] = $parameters[$pos];
                 unset($parameters[$pos]);
+                $optionalArguments = array();
                 ++$pos;
-            } elseif ($param->isDefaultValueAvailable()) {
-                $arguments[] = new Twig_Node_Expression_Constant($param->getDefaultValue(), -1);
-            } elseif ($param->isOptional()) {
-                break;
+            } elseif ($callableParameter->isDefaultValueAvailable()) {
+                $optionalArguments[] = new Twig_Node_Expression_Constant($callableParameter->getDefaultValue(), -1);
+            } elseif ($callableParameter->isOptional()) {
+                if (empty($parameters)) {
+                    break;
+                } else {
+                    $missingArguments[] = $name;
+                }
             } else {
-                throw new Twig_Error_Syntax(sprintf('Value for argument "%s" is required for %s "%s".', $name, $this->getAttribute('type'), $this->getAttribute('name')));
+                throw new Twig_Error_Syntax(sprintf('Value for argument "%s" is required for %s "%s".', $name, $callType, $callName));
+            }
+        }
+
+        if ($isVariadic) {
+            $arbitraryArguments = new Twig_Node_Expression_Array(array(), -1);
+            foreach ($parameters as $key => $value) {
+                if (is_int($key)) {
+                    $arbitraryArguments->addElement($value);
+                } else {
+                    $arbitraryArguments->addElement($value, new Twig_Node_Expression_Constant($key, -1));
+                }
+                unset($parameters[$key]);
+            }
+
+            if ($arbitraryArguments->count()) {
+                $arguments = array_merge($arguments, $optionalArguments);
+                $arguments[] = $arbitraryArguments;
             }
         }
 
         if (!empty($parameters)) {
-            throw new Twig_Error_Syntax(sprintf('Unknown argument%s "%s" for %s "%s".', count($parameters) > 1 ? 's' : '' , implode('", "', array_keys($parameters)), $this->getAttribute('type'), $this->getAttribute('name')));
+            $unknownParameter = null;
+            foreach ($parameters as $parameter) {
+                if ($parameter instanceof Twig_Node) {
+                    $unknownParameter = $parameter;
+                    break;
+                }
+            }
+
+            throw new Twig_Error_Syntax(sprintf(
+                'Unknown argument%s "%s" for %s "%s(%s)".',
+                count($parameters) > 1 ? 's' : '', implode('", "', array_keys($parameters)), $callType, $callName, implode(', ', $names)
+            ), $unknownParameter ? $unknownParameter->getTemplateLine() : -1);
         }
 
         return $arguments;
@@ -175,4 +215,77 @@ abstract class Twig_Node_Expression_Call extends Twig_Node_Expression
     {
         return strtolower(preg_replace(array('/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'), array('\\1_\\2', '\\1_\\2'), $name));
     }
+
+    private function getCallableParameters($callable, $isVariadic)
+    {
+        list($r) = $this->reflectCallable($callable);
+        if (null === $r) {
+            return array();
+        }
+
+        $parameters = $r->getParameters();
+        if ($this->hasNode('node')) {
+            array_shift($parameters);
+        }
+        if ($this->hasAttribute('needs_environment') && $this->getAttribute('needs_environment')) {
+            array_shift($parameters);
+        }
+        if ($this->hasAttribute('needs_context') && $this->getAttribute('needs_context')) {
+            array_shift($parameters);
+        }
+        if ($this->hasAttribute('arguments') && null !== $this->getAttribute('arguments')) {
+            foreach ($this->getAttribute('arguments') as $argument) {
+                array_shift($parameters);
+            }
+        }
+        if ($isVariadic) {
+            $argument = end($parameters);
+            if ($argument && $argument->isArray() && $argument->isDefaultValueAvailable() && array() === $argument->getDefaultValue()) {
+                array_pop($parameters);
+            } else {
+                $callableName = $r->name;
+                if ($r instanceof ReflectionMethod) {
+                    $callableName = $r->getDeclaringClass()->name.'::'.$callableName;
+                }
+
+                throw new LogicException(sprintf('The last parameter of "%s" for %s "%s" must be an array with default value, eg. "array $arg = array()".', $callableName, $this->getAttribute('type'), $this->getAttribute('name')));
+            }
+        }
+
+        return $parameters;
+    }
+
+    private function reflectCallable($callable)
+    {
+        if (null !== $this->reflector) {
+            return $this->reflector;
+        }
+
+        if (is_array($callable)) {
+            if (!method_exists($callable[0], $callable[1])) {
+                // __call()
+                return array(null, array());
+            }
+            $r = new ReflectionMethod($callable[0], $callable[1]);
+        } elseif (is_object($callable) && !$callable instanceof Closure) {
+            $r = new ReflectionObject($callable);
+            $r = $r->getMethod('__invoke');
+            $callable = array($callable, '__invoke');
+        } elseif (is_string($callable) && false !== $pos = strpos($callable, '::')) {
+            $class = substr($callable, 0, $pos);
+            $method = substr($callable, $pos + 2);
+            if (!method_exists($class, $method)) {
+                // __staticCall()
+                return array(null, array());
+            }
+            $r = new ReflectionMethod($callable);
+            $callable = array($class, $method);
+        } else {
+            $r = new ReflectionFunction($callable);
+        }
+
+        return $this->reflector = array($r, $callable);
+    }
 }
+
+class_alias('Twig_Node_Expression_Call', 'Twig\Node\Expression\CallExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/Conditional.php b/inc/lib/Twig/Node/Expression/Conditional.php
index edcb1e2d..c339d773 100644
--- a/inc/lib/Twig/Node/Expression/Conditional.php
+++ b/inc/lib/Twig/Node/Expression/Conditional.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -29,3 +29,5 @@ class Twig_Node_Expression_Conditional extends Twig_Node_Expression
         ;
     }
 }
+
+class_alias('Twig_Node_Expression_Conditional', 'Twig\Node\Expression\ConditionalExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/Constant.php b/inc/lib/Twig/Node/Expression/Constant.php
index a91dc698..bf4d031c 100644
--- a/inc/lib/Twig/Node/Expression/Constant.php
+++ b/inc/lib/Twig/Node/Expression/Constant.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -21,3 +21,5 @@ class Twig_Node_Expression_Constant extends Twig_Node_Expression
         $compiler->repr($this->getAttribute('value'));
     }
 }
+
+class_alias('Twig_Node_Expression_Constant', 'Twig\Node\Expression\ConstantExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/ExtensionReference.php b/inc/lib/Twig/Node/Expression/ExtensionReference.php
index 00ac6701..114b5cd9 100644
--- a/inc/lib/Twig/Node/Expression/ExtensionReference.php
+++ b/inc/lib/Twig/Node/Expression/ExtensionReference.php
@@ -3,16 +3,20 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 
+@trigger_error('The Twig_Node_Expression_ExtensionReference class is deprecated since version 1.23 and will be removed in 2.0.', E_USER_DEPRECATED);
+
 /**
  * Represents an extension call node.
  *
  * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.23 and will be removed in 2.0.
  */
 class Twig_Node_Expression_ExtensionReference extends Twig_Node_Expression
 {
@@ -21,11 +25,6 @@ class Twig_Node_Expression_ExtensionReference extends Twig_Node_Expression
         parent::__construct(array(), array('name' => $name), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler->raw(sprintf("\$this->env->getExtension('%s')", $this->getAttribute('name')));
diff --git a/inc/lib/Twig/Node/Expression/Filter.php b/inc/lib/Twig/Node/Expression/Filter.php
index 207b062a..12da1d67 100644
--- a/inc/lib/Twig/Node/Expression/Filter.php
+++ b/inc/lib/Twig/Node/Expression/Filter.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -30,7 +30,12 @@ class Twig_Node_Expression_Filter extends Twig_Node_Expression_Call
         if ($filter instanceof Twig_FilterCallableInterface || $filter instanceof Twig_SimpleFilter) {
             $this->setAttribute('callable', $filter->getCallable());
         }
+        if ($filter instanceof Twig_SimpleFilter) {
+            $this->setAttribute('is_variadic', $filter->isVariadic());
+        }
 
         $this->compileCallable($compiler);
     }
 }
+
+class_alias('Twig_Node_Expression_Filter', 'Twig\Node\Expression\FilterExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/Filter/Default.php b/inc/lib/Twig/Node/Expression/Filter/Default.php
index 1827c888..d2e19d54 100644
--- a/inc/lib/Twig/Node/Expression/Filter/Default.php
+++ b/inc/lib/Twig/Node/Expression/Filter/Default.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -22,13 +22,13 @@ class Twig_Node_Expression_Filter_Default extends Twig_Node_Expression_Filter
 {
     public function __construct(Twig_NodeInterface $node, Twig_Node_Expression_Constant $filterName, Twig_NodeInterface $arguments, $lineno, $tag = null)
     {
-        $default = new Twig_Node_Expression_Filter($node, new Twig_Node_Expression_Constant('default', $node->getLine()), $arguments, $node->getLine());
+        $default = new Twig_Node_Expression_Filter($node, new Twig_Node_Expression_Constant('default', $node->getTemplateLine()), $arguments, $node->getTemplateLine());
 
         if ('default' === $filterName->getAttribute('value') && ($node instanceof Twig_Node_Expression_Name || $node instanceof Twig_Node_Expression_GetAttr)) {
-            $test = new Twig_Node_Expression_Test_Defined(clone $node, 'defined', new Twig_Node(), $node->getLine());
-            $false = count($arguments) ? $arguments->getNode(0) : new Twig_Node_Expression_Constant('', $node->getLine());
+            $test = new Twig_Node_Expression_Test_Defined(clone $node, 'defined', new Twig_Node(), $node->getTemplateLine());
+            $false = count($arguments) ? $arguments->getNode(0) : new Twig_Node_Expression_Constant('', $node->getTemplateLine());
 
-            $node = new Twig_Node_Expression_Conditional($test, $default, $false, $node->getLine());
+            $node = new Twig_Node_Expression_Conditional($test, $default, $false, $node->getTemplateLine());
         } else {
             $node = $default;
         }
@@ -41,3 +41,5 @@ class Twig_Node_Expression_Filter_Default extends Twig_Node_Expression_Filter
         $compiler->subcompile($this->getNode('node'));
     }
 }
+
+class_alias('Twig_Node_Expression_Filter_Default', 'Twig\Node\Expression\Filter\DefaultFilter', false);
diff --git a/inc/lib/Twig/Node/Expression/Function.php b/inc/lib/Twig/Node/Expression/Function.php
index 3e1f6b55..cdee7c97 100644
--- a/inc/lib/Twig/Node/Expression/Function.php
+++ b/inc/lib/Twig/Node/Expression/Function.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -12,7 +12,7 @@ class Twig_Node_Expression_Function extends Twig_Node_Expression_Call
 {
     public function __construct($name, Twig_NodeInterface $arguments, $lineno)
     {
-        parent::__construct(array('arguments' => $arguments), array('name' => $name), $lineno);
+        parent::__construct(array('arguments' => $arguments), array('name' => $name, 'is_defined_test' => false), $lineno);
     }
 
     public function compile(Twig_Compiler $compiler)
@@ -27,9 +27,19 @@ class Twig_Node_Expression_Function extends Twig_Node_Expression_Call
         $this->setAttribute('needs_context', $function->needsContext());
         $this->setAttribute('arguments', $function->getArguments());
         if ($function instanceof Twig_FunctionCallableInterface || $function instanceof Twig_SimpleFunction) {
-            $this->setAttribute('callable', $function->getCallable());
+            $callable = $function->getCallable();
+            if ('constant' === $name && $this->getAttribute('is_defined_test')) {
+                $callable = 'twig_constant_is_defined';
+            }
+
+            $this->setAttribute('callable', $callable);
+        }
+        if ($function instanceof Twig_SimpleFunction) {
+            $this->setAttribute('is_variadic', $function->isVariadic());
         }
 
         $this->compileCallable($compiler);
     }
 }
+
+class_alias('Twig_Node_Expression_Function', 'Twig\Node\Expression\FunctionExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/GetAttr.php b/inc/lib/Twig/Node/Expression/GetAttr.php
index 55d9fcc3..b7823acc 100644
--- a/inc/lib/Twig/Node/Expression/GetAttr.php
+++ b/inc/lib/Twig/Node/Expression/GetAttr.php
@@ -3,21 +3,30 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 class Twig_Node_Expression_GetAttr extends Twig_Node_Expression
 {
-    public function __construct(Twig_Node_Expression $node, Twig_Node_Expression $attribute, Twig_Node_Expression_Array $arguments, $type, $lineno)
+    public function __construct(Twig_Node_Expression $node, Twig_Node_Expression $attribute, Twig_Node_Expression $arguments = null, $type, $lineno)
     {
-        parent::__construct(array('node' => $node, 'attribute' => $attribute, 'arguments' => $arguments), array('type' => $type, 'is_defined_test' => false, 'ignore_strict_check' => false, 'disable_c_ext' => false), $lineno);
+        $nodes = array('node' => $node, 'attribute' => $attribute);
+        if (null !== $arguments) {
+            $nodes['arguments'] = $arguments;
+        }
+
+        parent::__construct($nodes, array('type' => $type, 'is_defined_test' => false, 'ignore_strict_check' => false, 'disable_c_ext' => false), $lineno);
     }
 
     public function compile(Twig_Compiler $compiler)
     {
+        if ($this->getAttribute('disable_c_ext')) {
+            @trigger_error(sprintf('Using the "disable_c_ext" attribute on %s is deprecated since version 1.30 and will be removed in 2.0.', __CLASS__), E_USER_DEPRECATED);
+        }
+
         if (function_exists('twig_template_get_attributes') && !$this->getAttribute('disable_c_ext')) {
             $compiler->raw('twig_template_get_attributes($this, ');
         } else {
@@ -32,22 +41,34 @@ class Twig_Node_Expression_GetAttr extends Twig_Node_Expression
 
         $compiler->raw(', ')->subcompile($this->getNode('attribute'));
 
-        if (count($this->getNode('arguments')) || Twig_Template::ANY_CALL !== $this->getAttribute('type') || $this->getAttribute('is_defined_test') || $this->getAttribute('ignore_strict_check')) {
-            $compiler->raw(', ')->subcompile($this->getNode('arguments'));
+        // only generate optional arguments when needed (to make generated code more readable)
+        $needFourth = $this->getAttribute('ignore_strict_check');
+        $needThird = $needFourth || $this->getAttribute('is_defined_test');
+        $needSecond = $needThird || Twig_Template::ANY_CALL !== $this->getAttribute('type');
+        $needFirst = $needSecond || $this->hasNode('arguments');
 
-            if (Twig_Template::ANY_CALL !== $this->getAttribute('type') || $this->getAttribute('is_defined_test') || $this->getAttribute('ignore_strict_check')) {
-                $compiler->raw(', ')->repr($this->getAttribute('type'));
+        if ($needFirst) {
+            if ($this->hasNode('arguments')) {
+                $compiler->raw(', ')->subcompile($this->getNode('arguments'));
+            } else {
+                $compiler->raw(', array()');
             }
+        }
 
-            if ($this->getAttribute('is_defined_test') || $this->getAttribute('ignore_strict_check')) {
-                $compiler->raw(', '.($this->getAttribute('is_defined_test') ? 'true' : 'false'));
-            }
+        if ($needSecond) {
+            $compiler->raw(', ')->repr($this->getAttribute('type'));
+        }
 
-            if ($this->getAttribute('ignore_strict_check')) {
-                $compiler->raw(', '.($this->getAttribute('ignore_strict_check') ? 'true' : 'false'));
-            }
+        if ($needThird) {
+            $compiler->raw(', ')->repr($this->getAttribute('is_defined_test'));
+        }
+
+        if ($needFourth) {
+            $compiler->raw(', ')->repr($this->getAttribute('ignore_strict_check'));
         }
 
         $compiler->raw(')');
     }
 }
+
+class_alias('Twig_Node_Expression_GetAttr', 'Twig\Node\Expression\GetAttrExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/MethodCall.php b/inc/lib/Twig/Node/Expression/MethodCall.php
index 620b02bf..709016eb 100644
--- a/inc/lib/Twig/Node/Expression/MethodCall.php
+++ b/inc/lib/Twig/Node/Expression/MethodCall.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2012 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -39,3 +39,5 @@ class Twig_Node_Expression_MethodCall extends Twig_Node_Expression
         $compiler->raw(')');
     }
 }
+
+class_alias('Twig_Node_Expression_MethodCall', 'Twig\Node\Expression\MethodCallExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/Name.php b/inc/lib/Twig/Node/Expression/Name.php
index 3b8fae01..9d5a21f8 100644
--- a/inc/lib/Twig/Node/Expression/Name.php
+++ b/inc/lib/Twig/Node/Expression/Name.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -12,7 +12,7 @@
 class Twig_Node_Expression_Name extends Twig_Node_Expression
 {
     protected $specialVars = array(
-        '_self'    => '$this',
+        '_self' => '$this',
         '_context' => '$context',
         '_charset' => '$this->env->getCharset()',
     );
@@ -26,6 +26,8 @@ class Twig_Node_Expression_Name extends Twig_Node_Expression
     {
         $name = $this->getAttribute('name');
 
+        $compiler->addDebugInfo($this);
+
         if ($this->getAttribute('is_defined_test')) {
             if ($this->isSpecial()) {
                 $compiler->repr(true);
@@ -41,10 +43,20 @@ class Twig_Node_Expression_Name extends Twig_Node_Expression
                 ->raw(']')
             ;
         } else {
-            // remove the non-PHP 5.4 version when PHP 5.3 support is dropped
-            // as the non-optimized version is just a workaround for slow ternary operator
-            // when the context has a lot of variables
-            if (version_compare(phpversion(), '5.4.0RC1', '>=')) {
+            if (PHP_VERSION_ID >= 70000) {
+                // use PHP 7 null coalescing operator
+                $compiler
+                    ->raw('($context[')
+                    ->string($name)
+                    ->raw('] ?? ')
+                ;
+
+                if ($this->getAttribute('ignore_strict_check') || !$compiler->getEnvironment()->isStrictVariables()) {
+                    $compiler->raw('null)');
+                } else {
+                    $compiler->raw('$this->getContext($context, ')->string($name)->raw('))');
+                }
+            } elseif (PHP_VERSION_ID >= 50400) {
                 // PHP 5.4 ternary operator performance was optimized
                 $compiler
                     ->raw('(isset($context[')
@@ -86,3 +98,5 @@ class Twig_Node_Expression_Name extends Twig_Node_Expression
         return !$this->isSpecial() && !$this->getAttribute('is_defined_test');
     }
 }
+
+class_alias('Twig_Node_Expression_Name', 'Twig\Node\Expression\NameExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/NullCoalesce.php b/inc/lib/Twig/Node/Expression/NullCoalesce.php
new file mode 100644
index 00000000..eaafa4c9
--- /dev/null
+++ b/inc/lib/Twig/Node/Expression/NullCoalesce.php
@@ -0,0 +1,48 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_NullCoalesce extends Twig_Node_Expression_Conditional
+{
+    public function __construct(Twig_NodeInterface $left, Twig_NodeInterface $right, $lineno)
+    {
+        $test = new Twig_Node_Expression_Binary_And(
+            new Twig_Node_Expression_Test_Defined(clone $left, 'defined', new Twig_Node(), $left->getTemplateLine()),
+            new Twig_Node_Expression_Unary_Not(new Twig_Node_Expression_Test_Null($left, 'null', new Twig_Node(), $left->getTemplateLine()), $left->getTemplateLine()),
+            $left->getTemplateLine()
+        );
+
+        parent::__construct($test, $left, $right, $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        /*
+         * This optimizes only one case. PHP 7 also supports more complex expressions
+         * that can return null. So, for instance, if log is defined, log("foo") ?? "..." works,
+         * but log($a["foo"]) ?? "..." does not if $a["foo"] is not defined. More advanced
+         * cases might be implemented as an optimizer node visitor, but has not been done
+         * as benefits are probably not worth the added complexity.
+         */
+        if (PHP_VERSION_ID >= 70000 && $this->getNode('expr2') instanceof Twig_Node_Expression_Name) {
+            $this->getNode('expr2')->setAttribute('always_defined', true);
+            $compiler
+                ->raw('((')
+                ->subcompile($this->getNode('expr2'))
+                ->raw(') ?? (')
+                ->subcompile($this->getNode('expr3'))
+                ->raw('))')
+            ;
+        } else {
+            parent::compile($compiler);
+        }
+    }
+}
+
+class_alias('Twig_Node_Expression_NullCoalesce', 'Twig\Node\Expression\NullCoalesceExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/Parent.php b/inc/lib/Twig/Node/Expression/Parent.php
index dcf618c0..78692db2 100644
--- a/inc/lib/Twig/Node/Expression/Parent.php
+++ b/inc/lib/Twig/Node/Expression/Parent.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -22,26 +22,23 @@ class Twig_Node_Expression_Parent extends Twig_Node_Expression
         parent::__construct(array(), array('output' => false, 'name' => $name), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         if ($this->getAttribute('output')) {
             $compiler
                 ->addDebugInfo($this)
-                ->write("\$this->displayParentBlock(")
+                ->write('$this->displayParentBlock(')
                 ->string($this->getAttribute('name'))
                 ->raw(", \$context, \$blocks);\n")
             ;
         } else {
             $compiler
-                ->raw("\$this->renderParentBlock(")
+                ->raw('$this->renderParentBlock(')
                 ->string($this->getAttribute('name'))
-                ->raw(", \$context, \$blocks)")
+                ->raw(', $context, $blocks)')
             ;
         }
     }
 }
+
+class_alias('Twig_Node_Expression_Parent', 'Twig\Node\Expression\ParentExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/TempName.php b/inc/lib/Twig/Node/Expression/TempName.php
index e6b058e8..0a86e003 100644
--- a/inc/lib/Twig/Node/Expression/TempName.php
+++ b/inc/lib/Twig/Node/Expression/TempName.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -24,3 +24,5 @@ class Twig_Node_Expression_TempName extends Twig_Node_Expression
         ;
     }
 }
+
+class_alias('Twig_Node_Expression_TempName', 'Twig\Node\Expression\TempNameExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/Test.php b/inc/lib/Twig/Node/Expression/Test.php
index 639f501a..ad102ba6 100644
--- a/inc/lib/Twig/Node/Expression/Test.php
+++ b/inc/lib/Twig/Node/Expression/Test.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -12,7 +12,12 @@ class Twig_Node_Expression_Test extends Twig_Node_Expression_Call
 {
     public function __construct(Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments = null, $lineno)
     {
-        parent::__construct(array('node' => $node, 'arguments' => $arguments), array('name' => $name), $lineno);
+        $nodes = array('node' => $node);
+        if (null !== $arguments) {
+            $nodes['arguments'] = $arguments;
+        }
+
+        parent::__construct($nodes, array('name' => $name), $lineno);
     }
 
     public function compile(Twig_Compiler $compiler)
@@ -26,7 +31,12 @@ class Twig_Node_Expression_Test extends Twig_Node_Expression_Call
         if ($test instanceof Twig_TestCallableInterface || $test instanceof Twig_SimpleTest) {
             $this->setAttribute('callable', $test->getCallable());
         }
+        if ($test instanceof Twig_SimpleTest) {
+            $this->setAttribute('is_variadic', $test->isVariadic());
+        }
 
         $this->compileCallable($compiler);
     }
 }
+
+class_alias('Twig_Node_Expression_Test', 'Twig\Node\Expression\TestExpression', false);
diff --git a/inc/lib/Twig/Node/Expression/Test/Constant.php b/inc/lib/Twig/Node/Expression/Test/Constant.php
index de55f5f5..a51a4ba1 100644
--- a/inc/lib/Twig/Node/Expression/Test/Constant.php
+++ b/inc/lib/Twig/Node/Expression/Test/Constant.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -44,3 +44,5 @@ class Twig_Node_Expression_Test_Constant extends Twig_Node_Expression_Test
         ;
     }
 }
+
+class_alias('Twig_Node_Expression_Test_Constant', 'Twig\Node\Expression\Test\ConstantTest', false);
diff --git a/inc/lib/Twig/Node/Expression/Test/Defined.php b/inc/lib/Twig/Node/Expression/Test/Defined.php
index 247b2e23..2136c390 100644
--- a/inc/lib/Twig/Node/Expression/Test/Defined.php
+++ b/inc/lib/Twig/Node/Expression/Test/Defined.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -25,17 +25,22 @@ class Twig_Node_Expression_Test_Defined extends Twig_Node_Expression_Test
 {
     public function __construct(Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments = null, $lineno)
     {
-        parent::__construct($node, $name, $arguments, $lineno);
-
         if ($node instanceof Twig_Node_Expression_Name) {
             $node->setAttribute('is_defined_test', true);
         } elseif ($node instanceof Twig_Node_Expression_GetAttr) {
             $node->setAttribute('is_defined_test', true);
-
             $this->changeIgnoreStrictCheck($node);
+        } elseif ($node instanceof Twig_Node_Expression_BlockReference) {
+            $node->setAttribute('is_defined_test', true);
+        } elseif ($node instanceof Twig_Node_Expression_Function && 'constant' === $node->getAttribute('name')) {
+            $node->setAttribute('is_defined_test', true);
+        } elseif ($node instanceof Twig_Node_Expression_Constant || $node instanceof Twig_Node_Expression_Array) {
+            $node = new Twig_Node_Expression_Constant(true, $node->getTemplateLine());
         } else {
-            throw new Twig_Error_Syntax('The "defined" test only works with simple variables', $this->getLine());
+            throw new Twig_Error_Syntax('The "defined" test only works with simple variables.', $this->getTemplateLine());
         }
+
+        parent::__construct($node, $name, $arguments, $lineno);
     }
 
     protected function changeIgnoreStrictCheck(Twig_Node_Expression_GetAttr $node)
@@ -52,3 +57,5 @@ class Twig_Node_Expression_Test_Defined extends Twig_Node_Expression_Test
         $compiler->subcompile($this->getNode('node'));
     }
 }
+
+class_alias('Twig_Node_Expression_Test_Defined', 'Twig\Node\Expression\Test\DefinedTest', false);
diff --git a/inc/lib/Twig/Node/Expression/Test/Divisibleby.php b/inc/lib/Twig/Node/Expression/Test/Divisibleby.php
index 0aceb530..a5d71961 100644
--- a/inc/lib/Twig/Node/Expression/Test/Divisibleby.php
+++ b/inc/lib/Twig/Node/Expression/Test/Divisibleby.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -13,7 +13,7 @@
  * Checks if a variable is divisible by a number.
  *
  * <pre>
- *  {% if loop.index is divisibleby(3) %}
+ *  {% if loop.index is divisible by(3) %}
  * </pre>
  *
  * @author Fabien Potencier <fabien@symfony.com>
@@ -31,3 +31,5 @@ class Twig_Node_Expression_Test_Divisibleby extends Twig_Node_Expression_Test
         ;
     }
 }
+
+class_alias('Twig_Node_Expression_Test_Divisibleby', 'Twig\Node\Expression\Test\DivisiblebyTest', false);
diff --git a/inc/lib/Twig/Node/Expression/Test/Even.php b/inc/lib/Twig/Node/Expression/Test/Even.php
index d7853e89..7e198bea 100644
--- a/inc/lib/Twig/Node/Expression/Test/Even.php
+++ b/inc/lib/Twig/Node/Expression/Test/Even.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -30,3 +30,5 @@ class Twig_Node_Expression_Test_Even extends Twig_Node_Expression_Test
         ;
     }
 }
+
+class_alias('Twig_Node_Expression_Test_Even', 'Twig\Node\Expression\Test\EvenTest', false);
diff --git a/inc/lib/Twig/Node/Expression/Test/Null.php b/inc/lib/Twig/Node/Expression/Test/Null.php
index 1c83825a..3746e4cb 100644
--- a/inc/lib/Twig/Node/Expression/Test/Null.php
+++ b/inc/lib/Twig/Node/Expression/Test/Null.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -29,3 +29,5 @@ class Twig_Node_Expression_Test_Null extends Twig_Node_Expression_Test
         ;
     }
 }
+
+class_alias('Twig_Node_Expression_Test_Null', 'Twig\Node\Expression\Test\NullTest', false);
diff --git a/inc/lib/Twig/Node/Expression/Test/Odd.php b/inc/lib/Twig/Node/Expression/Test/Odd.php
index 421c19e8..0c6c099b 100644
--- a/inc/lib/Twig/Node/Expression/Test/Odd.php
+++ b/inc/lib/Twig/Node/Expression/Test/Odd.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -30,3 +30,5 @@ class Twig_Node_Expression_Test_Odd extends Twig_Node_Expression_Test
         ;
     }
 }
+
+class_alias('Twig_Node_Expression_Test_Odd', 'Twig\Node\Expression\Test\OddTest', false);
diff --git a/inc/lib/Twig/Node/Expression/Test/Sameas.php b/inc/lib/Twig/Node/Expression/Test/Sameas.php
index b48905ee..e95ff1f2 100644
--- a/inc/lib/Twig/Node/Expression/Test/Sameas.php
+++ b/inc/lib/Twig/Node/Expression/Test/Sameas.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -27,3 +27,5 @@ class Twig_Node_Expression_Test_Sameas extends Twig_Node_Expression_Test
         ;
     }
 }
+
+class_alias('Twig_Node_Expression_Test_Sameas', 'Twig\Node\Expression\Test\SameasTest', false);
diff --git a/inc/lib/Twig/Node/Expression/Unary.php b/inc/lib/Twig/Node/Expression/Unary.php
index c514388e..5804485e 100644
--- a/inc/lib/Twig/Node/Expression/Unary.php
+++ b/inc/lib/Twig/Node/Expression/Unary.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -18,13 +18,12 @@ abstract class Twig_Node_Expression_Unary extends Twig_Node_Expression
 
     public function compile(Twig_Compiler $compiler)
     {
-        $compiler->raw('(');
+        $compiler->raw(' ');
         $this->operator($compiler);
-        $compiler
-            ->subcompile($this->getNode('node'))
-            ->raw(')')
-        ;
+        $compiler->subcompile($this->getNode('node'));
     }
 
     abstract public function operator(Twig_Compiler $compiler);
 }
+
+class_alias('Twig_Node_Expression_Unary', 'Twig\Node\Expression\Unary\AbstractUnary', false);
diff --git a/inc/lib/Twig/Node/Expression/Unary/Neg.php b/inc/lib/Twig/Node/Expression/Unary/Neg.php
index 2a3937ec..039d933d 100644
--- a/inc/lib/Twig/Node/Expression/Unary/Neg.php
+++ b/inc/lib/Twig/Node/Expression/Unary/Neg.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Unary_Neg extends Twig_Node_Expression_Unary
         $compiler->raw('-');
     }
 }
+
+class_alias('Twig_Node_Expression_Unary_Neg', 'Twig\Node\Expression\Unary\NegUnary', false);
diff --git a/inc/lib/Twig/Node/Expression/Unary/Not.php b/inc/lib/Twig/Node/Expression/Unary/Not.php
index f94073cf..a0860b18 100644
--- a/inc/lib/Twig/Node/Expression/Unary/Not.php
+++ b/inc/lib/Twig/Node/Expression/Unary/Not.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Unary_Not extends Twig_Node_Expression_Unary
         $compiler->raw('!');
     }
 }
+
+class_alias('Twig_Node_Expression_Unary_Not', 'Twig\Node\Expression\Unary\NotUnary', false);
diff --git a/inc/lib/Twig/Node/Expression/Unary/Pos.php b/inc/lib/Twig/Node/Expression/Unary/Pos.php
index 04edb52a..eeff5452 100644
--- a/inc/lib/Twig/Node/Expression/Unary/Pos.php
+++ b/inc/lib/Twig/Node/Expression/Unary/Pos.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,3 +16,5 @@ class Twig_Node_Expression_Unary_Pos extends Twig_Node_Expression_Unary
         $compiler->raw('+');
     }
 }
+
+class_alias('Twig_Node_Expression_Unary_Pos', 'Twig\Node\Expression\Unary\PosUnary', false);
diff --git a/inc/lib/Twig/Node/Flush.php b/inc/lib/Twig/Node/Flush.php
index 0467ddce..fcc461ac 100644
--- a/inc/lib/Twig/Node/Flush.php
+++ b/inc/lib/Twig/Node/Flush.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -21,11 +21,6 @@ class Twig_Node_Flush extends Twig_Node
         parent::__construct(array(), array(), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -34,3 +29,5 @@ class Twig_Node_Flush extends Twig_Node
         ;
     }
 }
+
+class_alias('Twig_Node_Flush', 'Twig\Node\FlushNode', false);
diff --git a/inc/lib/Twig/Node/For.php b/inc/lib/Twig/Node/For.php
index d1ff371d..914b70c9 100644
--- a/inc/lib/Twig/Node/For.php
+++ b/inc/lib/Twig/Node/For.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -27,26 +27,25 @@ class Twig_Node_For extends Twig_Node
             $body = new Twig_Node_If(new Twig_Node(array($ifexpr, $body)), null, $lineno, $tag);
         }
 
-        parent::__construct(array('key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body, 'else' => $else), array('with_loop' => true, 'ifexpr' => null !== $ifexpr), $lineno, $tag);
+        $nodes = array('key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body);
+        if (null !== $else) {
+            $nodes['else'] = $else;
+        }
+
+        parent::__construct($nodes, array('with_loop' => true, 'ifexpr' => null !== $ifexpr), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
             ->addDebugInfo($this)
-            // the (array) cast bypasses a PHP 5.2.6 bug
-            ->write("\$context['_parent'] = (array) \$context;\n")
+            ->write("\$context['_parent'] = \$context;\n")
             ->write("\$context['_seq'] = twig_ensure_traversable(")
             ->subcompile($this->getNode('seq'))
             ->raw(");\n")
         ;
 
-        if (null !== $this->getNode('else')) {
+        if ($this->hasNode('else')) {
             $compiler->write("\$context['_iterated'] = false;\n");
         }
 
@@ -75,14 +74,14 @@ class Twig_Node_For extends Twig_Node
             }
         }
 
-        $this->loop->setAttribute('else', null !== $this->getNode('else'));
+        $this->loop->setAttribute('else', $this->hasNode('else'));
         $this->loop->setAttribute('with_loop', $this->getAttribute('with_loop'));
         $this->loop->setAttribute('ifexpr', $this->getAttribute('ifexpr'));
 
         $compiler
             ->write("foreach (\$context['_seq'] as ")
             ->subcompile($this->getNode('key_target'))
-            ->raw(" => ")
+            ->raw(' => ')
             ->subcompile($this->getNode('value_target'))
             ->raw(") {\n")
             ->indent()
@@ -91,7 +90,7 @@ class Twig_Node_For extends Twig_Node
             ->write("}\n")
         ;
 
-        if (null !== $this->getNode('else')) {
+        if ($this->hasNode('else')) {
             $compiler
                 ->write("if (!\$context['_iterated']) {\n")
                 ->indent()
@@ -110,3 +109,5 @@ class Twig_Node_For extends Twig_Node
         $compiler->write("\$context = array_intersect_key(\$context, \$_parent) + \$_parent;\n");
     }
 }
+
+class_alias('Twig_Node_For', 'Twig\Node\ForNode', false);
diff --git a/inc/lib/Twig/Node/ForLoop.php b/inc/lib/Twig/Node/ForLoop.php
index b8841583..06477cf1 100644
--- a/inc/lib/Twig/Node/ForLoop.php
+++ b/inc/lib/Twig/Node/ForLoop.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -21,11 +21,6 @@ class Twig_Node_ForLoop extends Twig_Node
         parent::__construct(array(), array('with_loop' => false, 'ifexpr' => false, 'else' => false), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         if ($this->getAttribute('else')) {
@@ -53,3 +48,5 @@ class Twig_Node_ForLoop extends Twig_Node
         }
     }
 }
+
+class_alias('Twig_Node_ForLoop', 'Twig\Node\ForLoopNode', false);
diff --git a/inc/lib/Twig/Node/If.php b/inc/lib/Twig/Node/If.php
index 4296a8d6..d82edec7 100644
--- a/inc/lib/Twig/Node/If.php
+++ b/inc/lib/Twig/Node/If.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -19,22 +19,22 @@ class Twig_Node_If extends Twig_Node
 {
     public function __construct(Twig_NodeInterface $tests, Twig_NodeInterface $else = null, $lineno, $tag = null)
     {
-        parent::__construct(array('tests' => $tests, 'else' => $else), array(), $lineno, $tag);
+        $nodes = array('tests' => $tests);
+        if (null !== $else) {
+            $nodes['else'] = $else;
+        }
+
+        parent::__construct($nodes, array(), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler->addDebugInfo($this);
-        for ($i = 0; $i < count($this->getNode('tests')); $i += 2) {
+        for ($i = 0, $count = count($this->getNode('tests')); $i < $count; $i += 2) {
             if ($i > 0) {
                 $compiler
                     ->outdent()
-                    ->write("} elseif (")
+                    ->write('} elseif (')
                 ;
             } else {
                 $compiler
@@ -50,7 +50,7 @@ class Twig_Node_If extends Twig_Node
             ;
         }
 
-        if ($this->hasNode('else') && null !== $this->getNode('else')) {
+        if ($this->hasNode('else')) {
             $compiler
                 ->outdent()
                 ->write("} else {\n")
@@ -64,3 +64,5 @@ class Twig_Node_If extends Twig_Node
             ->write("}\n");
     }
 }
+
+class_alias('Twig_Node_If', 'Twig\Node\IfNode', false);
diff --git a/inc/lib/Twig/Node/Import.php b/inc/lib/Twig/Node/Import.php
index 99efc091..c77e320b 100644
--- a/inc/lib/Twig/Node/Import.php
+++ b/inc/lib/Twig/Node/Import.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -21,11 +21,6 @@ class Twig_Node_Import extends Twig_Node
         parent::__construct(array('expr' => $expr, 'var' => $var), array(), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -36,15 +31,21 @@ class Twig_Node_Import extends Twig_Node
         ;
 
         if ($this->getNode('expr') instanceof Twig_Node_Expression_Name && '_self' === $this->getNode('expr')->getAttribute('name')) {
-            $compiler->raw("\$this");
+            $compiler->raw('$this');
         } else {
             $compiler
-                ->raw('$this->env->loadTemplate(')
+                ->raw('$this->loadTemplate(')
                 ->subcompile($this->getNode('expr'))
-                ->raw(")")
+                ->raw(', ')
+                ->repr($this->getTemplateName())
+                ->raw(', ')
+                ->repr($this->getTemplateLine())
+                ->raw(')')
             ;
         }
 
         $compiler->raw(";\n");
     }
 }
+
+class_alias('Twig_Node_Import', 'Twig\Node\ImportNode', false);
diff --git a/inc/lib/Twig/Node/Include.php b/inc/lib/Twig/Node/Include.php
index ed4a3751..2a5114cb 100644
--- a/inc/lib/Twig/Node/Include.php
+++ b/inc/lib/Twig/Node/Include.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -19,14 +19,14 @@ class Twig_Node_Include extends Twig_Node implements Twig_NodeOutputInterface
 {
     public function __construct(Twig_Node_Expression $expr, Twig_Node_Expression $variables = null, $only = false, $ignoreMissing = false, $lineno, $tag = null)
     {
-        parent::__construct(array('expr' => $expr, 'variables' => $variables), array('only' => (Boolean) $only, 'ignore_missing' => (Boolean) $ignoreMissing), $lineno, $tag);
+        $nodes = array('expr' => $expr);
+        if (null !== $variables) {
+            $nodes['variables'] = $variables;
+        }
+
+        parent::__construct($nodes, array('only' => (bool) $only, 'ignore_missing' => (bool) $ignoreMissing), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler->addDebugInfo($this);
@@ -60,40 +60,31 @@ class Twig_Node_Include extends Twig_Node implements Twig_NodeOutputInterface
 
     protected function addGetTemplate(Twig_Compiler $compiler)
     {
-        if ($this->getNode('expr') instanceof Twig_Node_Expression_Constant) {
-            $compiler
-                ->write("\$this->env->loadTemplate(")
-                ->subcompile($this->getNode('expr'))
-                ->raw(")")
-            ;
-        } else {
-            $compiler
-                ->write("\$template = \$this->env->resolveTemplate(")
-                ->subcompile($this->getNode('expr'))
-                ->raw(");\n")
-                ->write('$template')
-            ;
-        }
+        $compiler
+             ->write('$this->loadTemplate(')
+             ->subcompile($this->getNode('expr'))
+             ->raw(', ')
+             ->repr($this->getTemplateName())
+             ->raw(', ')
+             ->repr($this->getTemplateLine())
+             ->raw(')')
+         ;
     }
 
     protected function addTemplateArguments(Twig_Compiler $compiler)
     {
-        if (false === $this->getAttribute('only')) {
-            if (null === $this->getNode('variables')) {
-                $compiler->raw('$context');
-            } else {
-                $compiler
-                    ->raw('array_merge($context, ')
-                    ->subcompile($this->getNode('variables'))
-                    ->raw(')')
-                ;
-            }
+        if (!$this->hasNode('variables')) {
+            $compiler->raw(false === $this->getAttribute('only') ? '$context' : 'array()');
+        } elseif (false === $this->getAttribute('only')) {
+            $compiler
+                ->raw('array_merge($context, ')
+                ->subcompile($this->getNode('variables'))
+                ->raw(')')
+            ;
         } else {
-            if (null === $this->getNode('variables')) {
-                $compiler->raw('array()');
-            } else {
-                $compiler->subcompile($this->getNode('variables'));
-            }
+            $compiler->subcompile($this->getNode('variables'));
         }
     }
 }
+
+class_alias('Twig_Node_Include', 'Twig\Node\IncludeNode', false);
diff --git a/inc/lib/Twig/Node/Macro.php b/inc/lib/Twig/Node/Macro.php
index 43c75e5c..3cf54977 100644
--- a/inc/lib/Twig/Node/Macro.php
+++ b/inc/lib/Twig/Node/Macro.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -16,28 +16,31 @@
  */
 class Twig_Node_Macro extends Twig_Node
 {
+    const VARARGS_NAME = 'varargs';
+
     public function __construct($name, Twig_NodeInterface $body, Twig_NodeInterface $arguments, $lineno, $tag = null)
     {
-        parent::__construct(array('body' => $body, 'arguments' => $arguments), array('name' => $name, 'method' => 'get'.ucfirst($name)), $lineno, $tag);
+        foreach ($arguments as $argumentName => $argument) {
+            if (self::VARARGS_NAME === $argumentName) {
+                throw new Twig_Error_Syntax(sprintf('The argument "%s" in macro "%s" cannot be defined because the variable "%s" is reserved for arbitrary arguments.', self::VARARGS_NAME, $name, self::VARARGS_NAME), $argument->getTemplateLine());
+            }
+        }
+
+        parent::__construct(array('body' => $body, 'arguments' => $arguments), array('name' => $name), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
             ->addDebugInfo($this)
-            ->write(sprintf("public function %s(", $this->getAttribute('method')))
+            ->write(sprintf('public function get%s(', $this->getAttribute('name')))
         ;
 
         $count = count($this->getNode('arguments'));
         $pos = 0;
         foreach ($this->getNode('arguments') as $name => $default) {
             $compiler
-                ->raw('$_'.$name.' = ')
+                ->raw('$__'.$name.'__ = ')
                 ->subcompile($default)
             ;
 
@@ -46,36 +49,55 @@ class Twig_Node_Macro extends Twig_Node
             }
         }
 
+        if (PHP_VERSION_ID >= 50600) {
+            if ($count) {
+                $compiler->raw(', ');
+            }
+
+            $compiler->raw('...$__varargs__');
+        }
+
         $compiler
             ->raw(")\n")
             ->write("{\n")
             ->indent()
         ;
 
-        if (!count($this->getNode('arguments'))) {
-            $compiler->write("\$context = \$this->env->getGlobals();\n\n");
-        } else {
+        $compiler
+            ->write("\$context = \$this->env->mergeGlobals(array(\n")
+            ->indent()
+        ;
+
+        foreach ($this->getNode('arguments') as $name => $default) {
             $compiler
-                ->write("\$context = \$this->env->mergeGlobals(array(\n")
-                ->indent()
+                ->write('')
+                ->string($name)
+                ->raw(' => $__'.$name.'__')
+                ->raw(",\n")
             ;
+        }
 
-            foreach ($this->getNode('arguments') as $name => $default) {
-                $compiler
-                    ->write('')
-                    ->string($name)
-                    ->raw(' => $_'.$name)
-                    ->raw(",\n")
-                ;
-            }
+        $compiler
+            ->write('')
+            ->string(self::VARARGS_NAME)
+            ->raw(' => ')
+        ;
 
+        if (PHP_VERSION_ID >= 50600) {
+            $compiler->raw("\$__varargs__,\n");
+        } else {
             $compiler
-                ->outdent()
-                ->write("));\n\n")
+                ->raw('func_num_args() > ')
+                ->repr($count)
+                ->raw(' ? array_slice(func_get_args(), ')
+                ->repr($count)
+                ->raw(") : array(),\n")
             ;
         }
 
         $compiler
+            ->outdent()
+            ->write("));\n\n")
             ->write("\$blocks = array();\n\n")
             ->write("ob_start();\n")
             ->write("try {\n")
@@ -87,6 +109,11 @@ class Twig_Node_Macro extends Twig_Node
             ->write("ob_end_clean();\n\n")
             ->write("throw \$e;\n")
             ->outdent()
+            ->write("} catch (Throwable \$e) {\n")
+            ->indent()
+            ->write("ob_end_clean();\n\n")
+            ->write("throw \$e;\n")
+            ->outdent()
             ->write("}\n\n")
             ->write("return ('' === \$tmp = ob_get_clean()) ? '' : new Twig_Markup(\$tmp, \$this->env->getCharset());\n")
             ->outdent()
@@ -94,3 +121,5 @@ class Twig_Node_Macro extends Twig_Node
         ;
     }
 }
+
+class_alias('Twig_Node_Macro', 'Twig\Node\MacroNode', false);
diff --git a/inc/lib/Twig/Node/Module.php b/inc/lib/Twig/Node/Module.php
index 224410a2..5cd8d050 100644
--- a/inc/lib/Twig/Node/Module.php
+++ b/inc/lib/Twig/Node/Module.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -13,14 +13,52 @@
 /**
  * Represents a module node.
  *
+ * Consider this class as being final. If you need to customize the behavior of
+ * the generated class, consider adding nodes to the following nodes: display_start,
+ * display_end, constructor_start, constructor_end, and class_end.
+ *
  * @author Fabien Potencier <fabien@symfony.com>
  */
 class Twig_Node_Module extends Twig_Node
 {
-    public function __construct(Twig_NodeInterface $body, Twig_Node_Expression $parent = null, Twig_NodeInterface $blocks, Twig_NodeInterface $macros, Twig_NodeInterface $traits, $embeddedTemplates, $filename)
+    private $source;
+
+    public function __construct(Twig_NodeInterface $body, Twig_Node_Expression $parent = null, Twig_NodeInterface $blocks, Twig_NodeInterface $macros, Twig_NodeInterface $traits, $embeddedTemplates, $name, $source = '')
     {
+        if (!$name instanceof Twig_Source) {
+            @trigger_error(sprintf('Passing a string as the $name argument of %s() is deprecated since version 1.27. Pass a Twig_Source instance instead.', __METHOD__), E_USER_DEPRECATED);
+            $this->source = new Twig_Source($source, $name);
+        } else {
+            $this->source = $name;
+        }
+
+        $nodes = array(
+            'body' => $body,
+            'blocks' => $blocks,
+            'macros' => $macros,
+            'traits' => $traits,
+            'display_start' => new Twig_Node(),
+            'display_end' => new Twig_Node(),
+            'constructor_start' => new Twig_Node(),
+            'constructor_end' => new Twig_Node(),
+            'class_end' => new Twig_Node(),
+        );
+        if (null !== $parent) {
+            $nodes['parent'] = $parent;
+        }
+
         // embedded templates are set as attributes so that they are only visited once by the visitors
-        parent::__construct(array('parent' => $parent, 'body' => $body, 'blocks' => $blocks, 'macros' => $macros, 'traits' => $traits), array('filename' => $filename, 'index' => null, 'embedded_templates' => $embeddedTemplates), 1);
+        parent::__construct($nodes, array(
+            // source to be remove in 2.0
+            'source' => $this->source->getCode(),
+            // filename to be remove in 2.0 (use getTemplateName() instead)
+            'filename' => $this->source->getName(),
+            'index' => null,
+            'embedded_templates' => $embeddedTemplates,
+        ), 1);
+
+        // populate the template name of all node children
+        $this->setTemplateName($this->source->getName());
     }
 
     public function setIndex($index)
@@ -28,11 +66,6 @@ class Twig_Node_Module extends Twig_Node
         $this->setAttribute('index', $index);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $this->compileTemplate($compiler);
@@ -50,17 +83,20 @@ class Twig_Node_Module extends Twig_Node
 
         $this->compileClassHeader($compiler);
 
-        if (count($this->getNode('blocks')) || count($this->getNode('traits')) || null === $this->getNode('parent') || $this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
+        if (
+            count($this->getNode('blocks'))
+            || count($this->getNode('traits'))
+            || !$this->hasNode('parent')
+            || $this->getNode('parent') instanceof Twig_Node_Expression_Constant
+            || count($this->getNode('constructor_start'))
+            || count($this->getNode('constructor_end'))
+        ) {
             $this->compileConstructor($compiler);
         }
 
         $this->compileGetParent($compiler);
 
-        $this->compileDisplayHeader($compiler);
-
-        $this->compileDisplayBody($compiler);
-
-        $this->compileDisplayFooter($compiler);
+        $this->compileDisplay($compiler);
 
         $compiler->subcompile($this->getNode('blocks'));
 
@@ -72,28 +108,38 @@ class Twig_Node_Module extends Twig_Node
 
         $this->compileDebugInfo($compiler);
 
+        $this->compileGetSource($compiler);
+
+        $this->compileGetSourceContext($compiler);
+
         $this->compileClassFooter($compiler);
     }
 
     protected function compileGetParent(Twig_Compiler $compiler)
     {
-        if (null === $this->getNode('parent')) {
+        if (!$this->hasNode('parent')) {
             return;
         }
+        $parent = $this->getNode('parent');
 
         $compiler
             ->write("protected function doGetParent(array \$context)\n", "{\n")
             ->indent()
-            ->write("return ")
+            ->addDebugInfo($parent)
+            ->write('return ')
         ;
 
-        if ($this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
-            $compiler->subcompile($this->getNode('parent'));
+        if ($parent instanceof Twig_Node_Expression_Constant) {
+            $compiler->subcompile($parent);
         } else {
             $compiler
-                ->raw("\$this->env->resolveTemplate(")
-                ->subcompile($this->getNode('parent'))
-                ->raw(")")
+                ->raw('$this->loadTemplate(')
+                ->subcompile($parent)
+                ->raw(', ')
+                ->repr($this->source->getName())
+                ->raw(', ')
+                ->repr($parent->getTemplateLine())
+                ->raw(')')
             ;
         }
 
@@ -104,27 +150,13 @@ class Twig_Node_Module extends Twig_Node
         ;
     }
 
-    protected function compileDisplayBody(Twig_Compiler $compiler)
-    {
-        $compiler->subcompile($this->getNode('body'));
-
-        if (null !== $this->getNode('parent')) {
-            if ($this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
-                $compiler->write("\$this->parent");
-            } else {
-                $compiler->write("\$this->getParent(\$context)");
-            }
-            $compiler->raw("->display(\$context, array_merge(\$this->blocks, \$blocks));\n");
-        }
-    }
-
     protected function compileClassHeader(Twig_Compiler $compiler)
     {
         $compiler
             ->write("\n\n")
-            // if the filename contains */, add a blank to avoid a PHP parse error
-            ->write("/* ".str_replace('*/', '* /', $this->getAttribute('filename'))." */\n")
-            ->write('class '.$compiler->getEnvironment()->getTemplateClass($this->getAttribute('filename'), $this->getAttribute('index')))
+            // if the template name contains */, add a blank to avoid a PHP parse error
+            ->write('/* '.str_replace('*/', '* /', $this->source->getName())." */\n")
+            ->write('class '.$compiler->getEnvironment()->getTemplateClass($this->source->getName(), $this->getAttribute('index')))
             ->raw(sprintf(" extends %s\n", $compiler->getEnvironment()->getBaseTemplateClass()))
             ->write("{\n")
             ->indent()
@@ -136,17 +168,23 @@ class Twig_Node_Module extends Twig_Node
         $compiler
             ->write("public function __construct(Twig_Environment \$env)\n", "{\n")
             ->indent()
+            ->subcompile($this->getNode('constructor_start'))
             ->write("parent::__construct(\$env);\n\n")
         ;
 
         // parent
-        if (null === $this->getNode('parent')) {
+        if (!$this->hasNode('parent')) {
             $compiler->write("\$this->parent = false;\n\n");
-        } elseif ($this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
+        } elseif (($parent = $this->getNode('parent')) && $parent instanceof Twig_Node_Expression_Constant) {
             $compiler
-                ->write("\$this->parent = \$this->env->loadTemplate(")
-                ->subcompile($this->getNode('parent'))
-                ->raw(");\n\n")
+                ->addDebugInfo($parent)
+                ->write('$this->parent = $this->loadTemplate(')
+                ->subcompile($parent)
+                ->raw(', ')
+                ->repr($this->source->getName())
+                ->raw(', ')
+                ->repr($parent->getTemplateLine())
+                ->raw(");\n")
             ;
         }
 
@@ -170,11 +208,23 @@ class Twig_Node_Module extends Twig_Node
 
                 foreach ($trait->getNode('targets') as $key => $value) {
                     $compiler
-                        ->write(sprintf("\$_trait_%s_blocks[", $i))
+                        ->write(sprintf('if (!isset($_trait_%s_blocks[', $i))
+                        ->string($key)
+                        ->raw("])) {\n")
+                        ->indent()
+                        ->write("throw new Twig_Error_Runtime(sprintf('Block ")
+                        ->string($key)
+                        ->raw(' is not defined in trait ')
+                        ->subcompile($trait->getNode('template'))
+                        ->raw(".'));\n")
+                        ->outdent()
+                        ->write("}\n\n")
+
+                        ->write(sprintf('$_trait_%s_blocks[', $i))
                         ->subcompile($value)
-                        ->raw(sprintf("] = \$_trait_%s_blocks[", $i))
+                        ->raw(sprintf('] = $_trait_%s_blocks[', $i))
                         ->string($key)
-                        ->raw(sprintf("]; unset(\$_trait_%s_blocks[", $i))
+                        ->raw(sprintf(']; unset($_trait_%s_blocks[', $i))
                         ->string($key)
                         ->raw("]);\n\n")
                     ;
@@ -187,9 +237,9 @@ class Twig_Node_Module extends Twig_Node
                     ->indent()
                 ;
 
-                for ($i = 0; $i < $countTraits; $i++) {
+                for ($i = 0; $i < $countTraits; ++$i) {
                     $compiler
-                        ->write(sprintf("\$_trait_%s_blocks".($i == $countTraits - 1 ? '' : ',')."\n", $i))
+                        ->write(sprintf('$_trait_%s_blocks'.($i == $countTraits - 1 ? '' : ',')."\n", $i))
                     ;
                 }
 
@@ -235,55 +285,35 @@ class Twig_Node_Module extends Twig_Node
 
         $compiler
             ->outdent()
-            ->write(");\n\n")
-        ;
-
-        // macro information
-        $compiler
-            ->write("\$this->macros = array(\n")
-            ->indent()
-        ;
-
-        foreach ($this->getNode('macros') as $name => $node) {
-            $compiler
-                ->addIndentation()->repr($name)->raw(" => array(\n")
-                ->indent()
-                ->write("'method' => ")->repr($node->getAttribute('method'))->raw(",\n")
-                ->write("'arguments' => array(\n")
-                ->indent()
-            ;
-            foreach ($node->getNode('arguments') as $argument => $value) {
-                $compiler->addIndentation()->repr($argument)->raw (' => ')->subcompile($value)->raw(",\n");
-            }
-            $compiler
-                ->outdent()
-                ->write("),\n")
-                ->outdent()
-                ->write("),\n")
-            ;
-        }
-        $compiler
-            ->outdent()
             ->write(");\n")
-        ;
-
-        $compiler
             ->outdent()
+            ->subcompile($this->getNode('constructor_end'))
             ->write("}\n\n")
         ;
     }
 
-    protected function compileDisplayHeader(Twig_Compiler $compiler)
+    protected function compileDisplay(Twig_Compiler $compiler)
     {
         $compiler
             ->write("protected function doDisplay(array \$context, array \$blocks = array())\n", "{\n")
             ->indent()
+            ->subcompile($this->getNode('display_start'))
+            ->subcompile($this->getNode('body'))
         ;
-    }
 
-    protected function compileDisplayFooter(Twig_Compiler $compiler)
-    {
+        if ($this->hasNode('parent')) {
+            $parent = $this->getNode('parent');
+            $compiler->addDebugInfo($parent);
+            if ($parent instanceof Twig_Node_Expression_Constant) {
+                $compiler->write('$this->parent');
+            } else {
+                $compiler->write('$this->getParent($context)');
+            }
+            $compiler->raw("->display(\$context, array_merge(\$this->blocks, \$blocks));\n");
+        }
+
         $compiler
+            ->subcompile($this->getNode('display_end'))
             ->outdent()
             ->write("}\n\n")
         ;
@@ -292,6 +322,7 @@ class Twig_Node_Module extends Twig_Node
     protected function compileClassFooter(Twig_Compiler $compiler)
     {
         $compiler
+            ->subcompile($this->getNode('class_end'))
             ->outdent()
             ->write("}\n")
         ;
@@ -308,7 +339,7 @@ class Twig_Node_Module extends Twig_Node
             ->write("public function getTemplateName()\n", "{\n")
             ->indent()
             ->write('return ')
-            ->repr($this->getAttribute('filename'))
+            ->repr($this->source->getName())
             ->raw(";\n")
             ->outdent()
             ->write("}\n\n")
@@ -324,7 +355,7 @@ class Twig_Node_Module extends Twig_Node
         //
         // Put another way, a template can be used as a trait if it
         // only contains blocks and use statements.
-        $traitable = null === $this->getNode('parent') && 0 === count($this->getNode('macros'));
+        $traitable = !$this->hasNode('parent') && 0 === count($this->getNode('macros'));
         if ($traitable) {
             if ($this->getNode('body') instanceof Twig_Node_Body) {
                 $nodes = $this->getNode('body')->getNode(0);
@@ -374,6 +405,37 @@ class Twig_Node_Module extends Twig_Node
             ->indent()
             ->write(sprintf("return %s;\n", str_replace("\n", '', var_export(array_reverse($compiler->getDebugInfo(), true), true))))
             ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileGetSource(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("/** @deprecated since 1.27 (to be removed in 2.0). Use getSourceContext() instead */\n")
+            ->write("public function getSource()\n", "{\n")
+            ->indent()
+            ->write("@trigger_error('The '.__METHOD__.' method is deprecated since version 1.27 and will be removed in 2.0. Use getSourceContext() instead.', E_USER_DEPRECATED);\n\n")
+            ->write('return $this->getSourceContext()->getCode();')
+            ->raw("\n")
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileGetSourceContext(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("public function getSourceContext()\n", "{\n")
+            ->indent()
+            ->write('return new Twig_Source(')
+            ->string($compiler->getEnvironment()->isDebug() ? $this->source->getCode() : '')
+            ->raw(', ')
+            ->string($this->source->getName())
+            ->raw(', ')
+            ->string($this->source->getPath())
+            ->raw(");\n")
+            ->outdent()
             ->write("}\n")
         ;
     }
@@ -382,22 +444,18 @@ class Twig_Node_Module extends Twig_Node
     {
         if ($node instanceof Twig_Node_Expression_Constant) {
             $compiler
-                ->write(sprintf("%s = \$this->env->loadTemplate(", $var))
+                ->write(sprintf('%s = $this->loadTemplate(', $var))
                 ->subcompile($node)
+                ->raw(', ')
+                ->repr($node->getTemplateName())
+                ->raw(', ')
+                ->repr($node->getTemplateLine())
                 ->raw(");\n")
             ;
         } else {
-            $compiler
-                ->write(sprintf("%s = ", $var))
-                ->subcompile($node)
-                ->raw(";\n")
-                ->write(sprintf("if (!%s", $var))
-                ->raw(" instanceof Twig_Template) {\n")
-                ->indent()
-                ->write(sprintf("%s = \$this->env->loadTemplate(%s);\n", $var, $var))
-                ->outdent()
-                ->write("}\n")
-            ;
+            throw new LogicException('Trait templates can only be constant nodes.');
         }
     }
 }
+
+class_alias('Twig_Node_Module', 'Twig\Node\ModuleNode', false);
diff --git a/inc/lib/Twig/Node/Print.php b/inc/lib/Twig/Node/Print.php
index b0c41d1d..374db89b 100644
--- a/inc/lib/Twig/Node/Print.php
+++ b/inc/lib/Twig/Node/Print.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -22,11 +22,6 @@ class Twig_Node_Print extends Twig_Node implements Twig_NodeOutputInterface
         parent::__construct(array('expr' => $expr), array(), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -37,3 +32,5 @@ class Twig_Node_Print extends Twig_Node implements Twig_NodeOutputInterface
         ;
     }
 }
+
+class_alias('Twig_Node_Print', 'Twig\Node\PrintNode', false);
diff --git a/inc/lib/Twig/Node/Sandbox.php b/inc/lib/Twig/Node/Sandbox.php
index 8cf3ed44..44b30ab9 100644
--- a/inc/lib/Twig/Node/Sandbox.php
+++ b/inc/lib/Twig/Node/Sandbox.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -21,16 +21,11 @@ class Twig_Node_Sandbox extends Twig_Node
         parent::__construct(array('body' => $body), array(), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
             ->addDebugInfo($this)
-            ->write("\$sandbox = \$this->env->getExtension('sandbox');\n")
+            ->write("\$sandbox = \$this->env->getExtension('Twig_Extension_Sandbox');\n")
             ->write("if (!\$alreadySandboxed = \$sandbox->isSandboxed()) {\n")
             ->indent()
             ->write("\$sandbox->enableSandbox();\n")
@@ -45,3 +40,5 @@ class Twig_Node_Sandbox extends Twig_Node
         ;
     }
 }
+
+class_alias('Twig_Node_Sandbox', 'Twig\Node\SandboxNode', false);
diff --git a/inc/lib/Twig/Node/SandboxedPrint.php b/inc/lib/Twig/Node/SandboxedPrint.php
index 73dfaa96..a08f21f5 100644
--- a/inc/lib/Twig/Node/SandboxedPrint.php
+++ b/inc/lib/Twig/Node/SandboxedPrint.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -21,21 +21,11 @@
  */
 class Twig_Node_SandboxedPrint extends Twig_Node_Print
 {
-    public function __construct(Twig_Node_Expression $expr, $lineno, $tag = null)
-    {
-        parent::__construct($expr, $lineno, $tag);
-    }
-
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
             ->addDebugInfo($this)
-            ->write('echo $this->env->getExtension(\'sandbox\')->ensureToStringAllowed(')
+            ->write('echo $this->env->getExtension(\'Twig_Extension_Sandbox\')->ensureToStringAllowed(')
             ->subcompile($this->getNode('expr'))
             ->raw(");\n")
         ;
@@ -46,9 +36,9 @@ class Twig_Node_SandboxedPrint extends Twig_Node_Print
      *
      * This is mostly needed when another visitor adds filters (like the escaper one).
      *
-     * @param Twig_Node $node A Node
+     * @return Twig_Node
      */
-    protected function removeNodeFilter($node)
+    protected function removeNodeFilter(Twig_Node $node)
     {
         if ($node instanceof Twig_Node_Expression_Filter) {
             return $this->removeNodeFilter($node->getNode('node'));
@@ -57,3 +47,5 @@ class Twig_Node_SandboxedPrint extends Twig_Node_Print
         return $node;
     }
 }
+
+class_alias('Twig_Node_SandboxedPrint', 'Twig\Node\SandboxedPrintNode', false);
diff --git a/inc/lib/Twig/Node/Set.php b/inc/lib/Twig/Node/Set.php
index 4c9c16ce..6c6743ee 100644
--- a/inc/lib/Twig/Node/Set.php
+++ b/inc/lib/Twig/Node/Set.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -14,7 +14,7 @@
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
-class Twig_Node_Set extends Twig_Node
+class Twig_Node_Set extends Twig_Node implements Twig_NodeCaptureInterface
 {
     public function __construct($capture, Twig_NodeInterface $names, Twig_NodeInterface $values, $lineno, $tag = null)
     {
@@ -30,17 +30,12 @@ class Twig_Node_Set extends Twig_Node
 
             $values = $this->getNode('values');
             if ($values instanceof Twig_Node_Text) {
-                $this->setNode('values', new Twig_Node_Expression_Constant($values->getAttribute('data'), $values->getLine()));
+                $this->setNode('values', new Twig_Node_Expression_Constant($values->getAttribute('data'), $values->getTemplateLine()));
                 $this->setAttribute('capture', false);
             }
         }
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler->addDebugInfo($this);
@@ -99,3 +94,5 @@ class Twig_Node_Set extends Twig_Node
         $compiler->raw(";\n");
     }
 }
+
+class_alias('Twig_Node_Set', 'Twig\Node\SetNode', false);
diff --git a/inc/lib/Twig/Node/SetTemp.php b/inc/lib/Twig/Node/SetTemp.php
index 3bdd1cb7..996fdcde 100644
--- a/inc/lib/Twig/Node/SetTemp.php
+++ b/inc/lib/Twig/Node/SetTemp.php
@@ -3,12 +3,15 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 
+/**
+ * @internal
+ */
 class Twig_Node_SetTemp extends Twig_Node
 {
     public function __construct($name, $lineno)
@@ -33,3 +36,5 @@ class Twig_Node_SetTemp extends Twig_Node
         ;
     }
 }
+
+class_alias('Twig_Node_SetTemp', 'Twig\Node\SetTempNode', false);
diff --git a/inc/lib/Twig/Node/Spaceless.php b/inc/lib/Twig/Node/Spaceless.php
index 7555fa0f..76f90cde 100644
--- a/inc/lib/Twig/Node/Spaceless.php
+++ b/inc/lib/Twig/Node/Spaceless.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2010 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -23,11 +23,6 @@ class Twig_Node_Spaceless extends Twig_Node
         parent::__construct(array('body' => $body), array(), $lineno, $tag);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -38,3 +33,5 @@ class Twig_Node_Spaceless extends Twig_Node
         ;
     }
 }
+
+class_alias('Twig_Node_Spaceless', 'Twig\Node\SpacelessNode', false);
diff --git a/inc/lib/Twig/Node/Text.php b/inc/lib/Twig/Node/Text.php
index 21bdcea1..f4577fee 100644
--- a/inc/lib/Twig/Node/Text.php
+++ b/inc/lib/Twig/Node/Text.php
@@ -3,8 +3,8 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
+ * (c) Fabien Potencier
+ * (c) Armin Ronacher
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -22,11 +22,6 @@ class Twig_Node_Text extends Twig_Node implements Twig_NodeOutputInterface
         parent::__construct(array(), array('data' => $data), $lineno);
     }
 
-    /**
-     * Compiles the node to PHP.
-     *
-     * @param Twig_Compiler A Twig_Compiler instance
-     */
     public function compile(Twig_Compiler $compiler)
     {
         $compiler
@@ -37,3 +32,5 @@ class Twig_Node_Text extends Twig_Node implements Twig_NodeOutputInterface
         ;
     }
 }
+
+class_alias('Twig_Node_Text', 'Twig\Node\TextNode', false);
diff --git a/inc/lib/Twig/Node/With.php b/inc/lib/Twig/Node/With.php
new file mode 100644
index 00000000..2ab0ea5d
--- /dev/null
+++ b/inc/lib/Twig/Node/With.php
@@ -0,0 +1,64 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a nested "with" scope.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_With extends Twig_Node
+{
+    public function __construct(Twig_Node $body, Twig_Node $variables = null, $only = false, $lineno, $tag = null)
+    {
+        $nodes = array('body' => $body);
+        if (null !== $variables) {
+            $nodes['variables'] = $variables;
+        }
+
+        parent::__construct($nodes, array('only' => (bool) $only), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->addDebugInfo($this);
+
+        if ($this->hasNode('variables')) {
+            $varsName = $compiler->getVarName();
+            $compiler
+                ->write(sprintf('$%s = ', $varsName))
+                ->subcompile($this->getNode('variables'))
+                ->raw(";\n")
+                ->write(sprintf("if (!is_array(\$%s)) {\n", $varsName))
+                ->indent()
+                ->write("throw new Twig_Error_Runtime('Variables passed to the \"with\" tag must be a hash.');\n")
+                ->outdent()
+                ->write("}\n")
+            ;
+
+            if ($this->getAttribute('only')) {
+                $compiler->write("\$context = array('_parent' => \$context);\n");
+            } else {
+                $compiler->write("\$context['_parent'] = \$context;\n");
+            }
+
+            $compiler->write(sprintf("\$context = array_merge(\$context, \$%s);\n", $varsName));
+        } else {
+            $compiler->write("\$context['_parent'] = \$context;\n");
+        }
+
+        $compiler
+            ->subcompile($this->getNode('body'))
+            ->write("\$context = \$context['_parent'];\n")
+        ;
+    }
+}
+
+class_alias('Twig_Node_With', 'Twig\Node\WithNode', false);