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optimize access to loop, key and value variables

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This commit is contained in:
Sergey Linnik
2014-07-11 17:00:19 +04:00
parent 5fd428ed76
commit 33ca8d11cb
1 changed files with 11 additions and 0 deletions
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lib/Twig/NodeVisitor/Optimizer.php
+11
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@@ -28,6 +28,7 @@ class Twig_NodeVisitor_Optimizer implements Twig_NodeVisitorInterface
const OPTIMIZE_VAR_ACCESS = 8;
protected $loops = array();
protected $loopsTargets = array();
protected $optimizers;
protected $prependedNodes = array();
protected $inABody = false;
@@ -174,6 +175,8 @@ class Twig_NodeVisitor_Optimizer implements Twig_NodeVisitorInterface
// disable the loop variable by default
$node->setAttribute('with_loop', false);
array_unshift($this->loops, $node);
array_unshift($this->loopsTargets, $node->getNode('value_target')->getAttribute('name'));
array_unshift($this->loopsTargets, $node->getNode('key_target')->getAttribute('name'));
} elseif (!$this->loops) {
// we are outside a loop
return;
@@ -183,9 +186,15 @@ class Twig_NodeVisitor_Optimizer implements Twig_NodeVisitorInterface
// the loop variable is referenced for the current loop
elseif ($node instanceof Twig_Node_Expression_Name && 'loop' === $node->getAttribute('name')) {
$node->setAttribute('always_defined', true);
$this->addLoopToCurrent();
}
// optimize access to loop targets
elseif ($node instanceof Twig_Node_Expression_Name && in_array($node->getAttribute('name'), $this->loopsTargets)) {
$node->setAttribute('always_defined', true);
}
// block reference
elseif ($node instanceof Twig_Node_BlockReference || $node instanceof Twig_Node_Expression_BlockReference) {
$this->addLoopToCurrent();
@@ -221,6 +230,8 @@ class Twig_NodeVisitor_Optimizer implements Twig_NodeVisitorInterface
{
if ($node instanceof Twig_Node_For) {
array_shift($this->loops);
array_shift($this->loopsTargets);
array_shift($this->loopsTargets);
}
}