mirror of https://github.com/rectorphp/rector.git
58 lines
1.5 KiB
PHP
58 lines
1.5 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\DeadCode\Rector\Foreach_;
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use PhpParser\Node;
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use PhpParser\Node\Stmt\Foreach_;
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use Rector\Core\Rector\AbstractRector;
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use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
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use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
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/**
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* @see \Rector\Tests\DeadCode\Rector\Foreach_\RemoveUnusedForeachKeyRector\RemoveUnusedForeachKeyRectorTest
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*/
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final class RemoveUnusedForeachKeyRector extends AbstractRector
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{
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Remove unused key in foreach', [new CodeSample(<<<'CODE_SAMPLE'
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$items = [];
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foreach ($items as $key => $value) {
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$result = $value;
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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$items = [];
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foreach ($items as $value) {
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$result = $value;
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}
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CODE_SAMPLE
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)]);
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}
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/**
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* @return array<class-string<Node>>
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*/
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public function getNodeTypes() : array
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{
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return [Foreach_::class];
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}
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/**
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* @param Foreach_ $node
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*/
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public function refactor(Node $node) : ?Node
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{
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if ($node->keyVar === null) {
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return null;
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}
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$keyVar = $node->keyVar;
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$isNodeUsed = (bool) $this->betterNodeFinder->findFirst($node->stmts, function (Node $node) use($keyVar) : bool {
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return $this->nodeComparator->areNodesEqual($node, $keyVar);
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});
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if ($isNodeUsed) {
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return null;
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}
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$node->keyVar = null;
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return $node;
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}
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}
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