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<?php |
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/** |
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* expression-types.php. |
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* |
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* |
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* Copyright (c) 2010-2013, Justin Swanhart |
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* with contributions by André Rothe <[email protected], [email protected]> |
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* and David Négrier <[email protected]> |
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* |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without modification, |
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* are permitted provided that the following conditions are met: |
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* |
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* * Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above copyright notice, |
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* this list of conditions and the following disclaimer in the documentation |
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* and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
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* SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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*/ |
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namespace SQLParser\Node; |
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use Doctrine\DBAL\Connection; |
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use Mouf\MoufInstanceDescriptor; |
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use Mouf\MoufManager; |
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use SQLParser\Node\Traverser\NodeTraverser; |
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use SQLParser\Node\Traverser\VisitorInterface; |
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/** |
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* This class represents a node that is an SQL expression. |
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* |
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* @author David Négrier <[email protected]> |
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*/ |
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class Expression implements NodeInterface |
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{ |
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private $baseExpression; |
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/** |
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* Returns the base expression (the string that generated this expression). |
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* |
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* @return string |
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*/ |
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public function getBaseExpression() |
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{ |
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return $this->baseExpression; |
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} |
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/** |
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* Sets the base expression (the string that generated this expression). |
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* |
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* @param string $baseExpression |
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*/ |
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public function setBaseExpression($baseExpression) |
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{ |
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$this->baseExpression = $baseExpression; |
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} |
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private $subTree; |
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public function getSubTree() |
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{ |
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return $this->subTree; |
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} |
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/** |
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* Sets the subtree. |
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* |
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* @Important |
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* |
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* @param array<NodeInterface>|NodeInterface $subTree |
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*/ |
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public function setSubTree($subTree) |
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{ |
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$this->subTree = $subTree; |
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$this->subTree = NodeFactory::simplify($this->subTree); |
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} |
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private $alias; |
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public function getAlias() |
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{ |
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return $this->alias; |
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} |
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/** |
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* Sets the alias. |
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* |
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* @Important |
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* |
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* @param string $alias |
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*/ |
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public function setAlias($alias) |
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{ |
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$this->alias = $alias; |
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} |
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private $direction; |
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public function getDiretion() |
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{ |
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return $this->direction; |
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} |
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/** |
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* Sets the direction. |
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* |
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* @Important |
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* |
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* @param string $direction |
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*/ |
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public function setDirection($direction) |
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{ |
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$this->direction = $direction; |
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} |
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private $brackets = false; |
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/** |
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* Returns true if the expression is between brackets. |
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* |
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* @return bool |
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*/ |
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public function hasBrackets() |
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{ |
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return $this->brackets; |
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} |
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/** |
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* Sets to true if the expression is between brackets. |
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* |
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* @Important |
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* |
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* @param bool $brackets |
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*/ |
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public function setBrackets($brackets) |
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{ |
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$this->brackets = $brackets; |
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} |
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/** |
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* Returns a Mouf instance descriptor describing this object. |
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* |
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* @param MoufManager $moufManager |
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* |
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* @return MoufInstanceDescriptor |
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*/ |
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public function toInstanceDescriptor(MoufManager $moufManager) |
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{ |
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$instanceDescriptor = $moufManager->createInstance(get_called_class()); |
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$instanceDescriptor->getProperty('baseExpression')->setValue(NodeFactory::nodeToInstanceDescriptor($this->baseExpression, $moufManager)); |
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$instanceDescriptor->getProperty('subTree')->setValue(NodeFactory::nodeToInstanceDescriptor($this->subTree, $moufManager)); |
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$instanceDescriptor->getProperty('alias')->setValue(NodeFactory::nodeToInstanceDescriptor($this->alias, $moufManager)); |
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$instanceDescriptor->getProperty('direction')->setValue(NodeFactory::nodeToInstanceDescriptor($this->direction, $moufManager)); |
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$instanceDescriptor->getProperty('brackets')->setValue(NodeFactory::nodeToInstanceDescriptor($this->brackets, $moufManager)); |
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return $instanceDescriptor; |
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} |
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/** |
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* Renders the object as a SQL string. |
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* |
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* @param Connection $dbConnection |
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* @param array $parameters |
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* @param number $indent |
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* @param int $conditionsMode |
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* |
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* @return string |
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*/ |
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public function toSql(array $parameters = array(), Connection $dbConnection = null, $indent = 0, $conditionsMode = self::CONDITION_APPLY) |
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{ |
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$sql = NodeFactory::toSql($this->subTree, $dbConnection, $parameters, ' ', false, $indent, $conditionsMode); |
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if ($this->alias) { |
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$sql .= ' AS '.$this->alias; |
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} |
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if ($this->direction) { |
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$sql .= ' '.$this->direction; |
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} |
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if ($this->brackets) { |
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$sql = '('.$sql.')'; |
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} |
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return $sql; |
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} |
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/** |
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* Walks the tree of nodes, calling the visitor passed in parameter. |
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* |
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* @param VisitorInterface $visitor |
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*/ |
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public function walk(VisitorInterface $visitor) |
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{ |
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$node = $this; |
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$result = $visitor->enterNode($node); |
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if ($result instanceof NodeInterface) { |
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$node = $result; |
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} |
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if ($result !== NodeTraverser::DONT_TRAVERSE_CHILDREN) { |
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foreach ($this->subTree as $key => $operand) { |
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$result2 = $operand->walk($visitor); |
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if ($result2 === NodeTraverser::REMOVE_NODE) { |
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unset($this->subTree[$key]); |
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} elseif ($result2 instanceof NodeInterface) { |
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$this->subTree[$key] = $result2; |
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} |
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} |
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} |
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return $visitor->leaveNode($node); |
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} |
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} |
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There are different options of fixing this problem.
If you want to be on the safe side, you can add an additional type-check:
If you are sure that the expression is traversable, you might want to add a doc comment cast to improve IDE auto-completion and static analysis:
Mark the issue as a false-positive: Just hover the remove button, in the top-right corner of this issue for more options.