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<?php |
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/* |
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* (c) Jean-François Lépine <https://twitter.com/Halleck45> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Hal\Component\Ast; |
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use PhpParser\Node; |
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use PhpParser\NodeTraverser as Mother; |
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use PhpParser\NodeVisitor; |
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/** |
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* Custom Ast Traverser |
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* |
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* @author Jean-François Lépine <https://twitter.com/Halleck45> |
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* @internal |
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*/ |
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class Traverser |
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{ |
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protected $stopCondition; |
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/** @var NodeTraverser */ |
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private $traverser; |
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public function __construct(Mother $traverser, $stopCondition = null) |
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{ |
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if(null === $stopCondition) { |
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$stopCondition = function($node) { |
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if ($node instanceof Node\Stmt\Class_ || $node instanceof Node\Stmt\Interface_) { |
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return false; |
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} |
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return true; |
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}; |
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} |
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$this->stopCondition = $stopCondition; |
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$this->traverser = $traverser; |
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} |
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/** |
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* @param array $nodes |
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* @param array|NodeVisitor[] $visitors |
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* @return array |
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*/ |
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public function traverseArray(array $nodes, array $visitors) { |
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$doNodes = array(); |
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foreach ($nodes as $i => &$node) { |
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if (is_array($node)) { |
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$node = $this->traverseArray($node, $visitors); |
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} elseif ($node instanceof Node) { |
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$traverseChildren = call_user_func($this->stopCondition, $node); |
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foreach ($visitors as $visitor) { |
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$return = $visitor->enterNode($node); |
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if (Mother::DONT_TRAVERSE_CHILDREN === $return) { |
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$traverseChildren = false; |
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} else if (null !== $return) { |
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$node = $return; |
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} |
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} |
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if ($traverseChildren) { |
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$node = $this->traverser->traverseNode($node); |
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} |
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foreach ($visitors as $visitor) { |
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$return = $visitor->leaveNode($node); |
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if (Mother::REMOVE_NODE === $return) { |
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$doNodes[] = array($i, array()); |
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break; |
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} elseif (is_array($return)) { |
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$doNodes[] = array($i, $return); |
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break; |
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} elseif (null !== $return) { |
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$node = $return; |
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} |
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} |
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} |
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} |
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if (!empty($doNodes)) { |
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while (list($i, $replace) = array_pop($doNodes)) { |
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array_splice($nodes, $i, 1, $replace); |
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} |
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} |
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return $nodes; |
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} |
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} |
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if (PHP_VERSION_ID >= 70000) { |
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class_alias(Php7NodeTraverser::class, __NAMESPACE__ . '\\NodeTraverser'); |
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} else { |
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class_alias(Php5NodeTraverser::class, __NAMESPACE__ . '\\NodeTraverser'); |
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} |
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phpmetrics /
PhpMetrics
Loading history...
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.