mirror of https://github.com/rectorphp/rector.git
53 lines
1.3 KiB
PHP
53 lines
1.3 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\DeadCode\Rector\Expression;
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use PhpParser\Node;
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use PhpParser\Node\Expr\Assign;
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use PhpParser\Node\Stmt\Expression;
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use PhpParser\NodeTraverser;
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use Rector\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\Expression\SimplifyMirrorAssignRector\SimplifyMirrorAssignRectorTest
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*/
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final class SimplifyMirrorAssignRector 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('Removes unneeded $value = $value assigns', [new CodeSample(<<<'CODE_SAMPLE'
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function run() {
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$result = $result;
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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function run() {
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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 [Expression::class];
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}
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/**
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* @param Expression $node
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*/
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public function refactor(Node $node) : ?int
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{
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if (!$node->expr instanceof Assign) {
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return null;
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}
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$assign = $node->expr;
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if (!$this->nodeComparator->areNodesEqual($assign->var, $assign->expr)) {
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return null;
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}
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return NodeTraverser::REMOVE_NODE;
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}
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}
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