2019-10-13 05:59:52 +00:00
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<?php
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2021-05-09 20:15:43 +00:00
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declare (strict_types=1);
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2022-06-06 17:12:56 +00:00
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namespace Rector\DeadCode\Rector\Expression;
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2018-10-15 09:41:53 +00:00
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2022-06-06 17:12:56 +00:00
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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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2023-06-05 09:32:57 +00:00
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use PhpParser\NodeTraverser;
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2024-01-02 02:40:38 +00:00
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use Rector\Rector\AbstractRector;
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2022-06-07 09:18:30 +00:00
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use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
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use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
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2019-09-03 09:11:45 +00:00
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/**
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2021-03-12 22:20:25 +00:00
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* @see \Rector\Tests\DeadCode\Rector\Expression\SimplifyMirrorAssignRector\SimplifyMirrorAssignRectorTest
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2019-09-03 09:11:45 +00:00
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*/
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2022-06-07 08:22:29 +00:00
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final class SimplifyMirrorAssignRector extends AbstractRector
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2018-10-15 09:41:53 +00:00
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{
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2022-06-07 08:22:29 +00:00
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public function getRuleDefinition() : RuleDefinition
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2018-10-15 09:41:53 +00:00
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{
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2022-08-24 08:53:31 +00:00
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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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2018-10-15 09:41:53 +00:00
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}
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/**
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2021-02-27 00:06:15 +00:00
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* @return array<class-string<Node>>
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2018-10-15 09:41:53 +00:00
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*/
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2021-05-09 20:15:43 +00:00
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public function getNodeTypes() : array
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2018-10-15 09:41:53 +00:00
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{
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2022-06-07 08:22:29 +00:00
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return [Expression::class];
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2018-10-15 09:41:53 +00:00
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}
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/**
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2021-12-10 10:22:23 +00:00
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* @param Expression $node
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2018-10-15 09:41:53 +00:00
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*/
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2023-06-05 09:32:57 +00:00
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public function refactor(Node $node) : ?int
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2018-10-15 09:41:53 +00:00
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{
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2022-06-07 08:22:29 +00:00
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if (!$node->expr instanceof Assign) {
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2018-10-15 09:41:53 +00:00
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return null;
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}
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2023-06-05 09:32:57 +00:00
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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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2018-10-15 09:41:53 +00:00
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}
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2023-06-05 09:32:57 +00:00
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return NodeTraverser::REMOVE_NODE;
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2018-10-15 09:41:53 +00:00
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}
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}
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