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<?php declare (strict_types=1); namespace Rector\DeadCode\Rector\StmtsAwareInterface; use PhpParser\Node; use PhpParser\Node\Expr\ArrayDimFetch; use PhpParser\Node\Expr\Assign; use PhpParser\Node\Expr\Variable; use PhpParser\Node\Stmt\Expression; use Rector\Core\Contract\PhpParser\Node\StmtsAwareInterface; use Rector\Core\Rector\AbstractRector; use Rector\DeadCode\NodeAnalyzer\JustPropertyFetchVariableAssignMatcher; use Rector\DeadCode\ValueObject\VariableAndPropertyFetchAssign; use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @see \Rector\Tests\DeadCode\Rector\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector\RemoveJustPropertyFetchForAssignRectorTest */ final class RemoveJustPropertyFetchForAssignRector extends AbstractRector { /** * @readonly * @var \Rector\DeadCode\NodeAnalyzer\JustPropertyFetchVariableAssignMatcher */ private $justPropertyFetchVariableAssignMatcher; public function __construct(JustPropertyFetchVariableAssignMatcher $justPropertyFetchVariableAssignMatcher) { $this->justPropertyFetchVariableAssignMatcher = $justPropertyFetchVariableAssignMatcher; } public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Remove assign of property, just for value assign', [new CodeSample(<<<'CODE_SAMPLE' class SomeClass { private $items = []; public function run() { $items = $this->items; $items[] = 1000; $this->items = $items ; } } CODE_SAMPLE , <<<'CODE_SAMPLE' class SomeClass { private $items = []; public function run() { $this->items[] = 1000; } } CODE_SAMPLE )]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [StmtsAwareInterface::class]; } /** * @param StmtsAwareInterface $node */ public function refactor(Node $node) : ?Node { $variableAndPropertyFetchAssign = $this->justPropertyFetchVariableAssignMatcher->match($node); if (!$variableAndPropertyFetchAssign instanceof VariableAndPropertyFetchAssign) { return null; } $secondStmt = $node->stmts[1]; if (!$secondStmt instanceof Expression) { return null; } if (!$secondStmt->expr instanceof Assign) { return null; } $middleAssign = $secondStmt->expr; $assignVar = $middleAssign->var; // unwrap all array dim fetch nesting $lastArrayDimFetch = null; while ($assignVar instanceof ArrayDimFetch) { $lastArrayDimFetch = $assignVar; $assignVar = $assignVar->var; } if (!$assignVar instanceof Variable) { return null; } if (!$this->nodeComparator->areNodesEqual($assignVar, $variableAndPropertyFetchAssign->getVariable())) { return null; } if ($lastArrayDimFetch instanceof ArrayDimFetch) { $lastArrayDimFetch->var = $variableAndPropertyFetchAssign->getPropertyFetch(); } else { $middleAssign->var = $variableAndPropertyFetchAssign->getPropertyFetch(); } // remove just-assign stmts unset($node->stmts[0]); unset($node->stmts[2]); return $node; } }
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