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https://github.com/rectorphp/rector.git
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[DeadCode] Add RemoveJustPropertyFetchForAssignRector (#2423)
This commit is contained in:
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@ -1,4 +1,4 @@
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# 516 Rules Overview
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# 517 Rules Overview
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<br>
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@ -14,7 +14,7 @@
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- [Composer](#composer) (6)
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- [DeadCode](#deadcode) (48)
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- [DeadCode](#deadcode) (49)
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- [DependencyInjection](#dependencyinjection) (2)
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@ -3230,6 +3230,29 @@ Remove empty method call
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<br>
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### RemoveJustPropertyFetchForAssignRector
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Remove assign of property, just for value assign
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- class: [`Rector\DeadCode\Rector\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector`](../rules/DeadCode/Rector/StmtsAwareInterface/RemoveJustPropertyFetchForAssignRector.php)
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```diff
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class SomeClass
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{
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private $items = [];
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public function run()
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{
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- $items = $this->items;
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- $items[] = 1000;
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- $this->items = $items ;
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+ $this->items[] = 1000;
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}
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}
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```
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<br>
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### RemoveLastReturnRector
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Remove very last `return` that has no meaning
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@ -44,6 +44,7 @@ use Rector\DeadCode\Rector\PropertyProperty\RemoveNullPropertyInitializationRect
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use Rector\DeadCode\Rector\Return_\RemoveDeadConditionAboveReturnRector;
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use Rector\DeadCode\Rector\StaticCall\RemoveParentCallWithoutParentRector;
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use Rector\DeadCode\Rector\Stmt\RemoveUnreachableStatementRector;
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use Rector\DeadCode\Rector\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector;
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use Rector\DeadCode\Rector\Switch_\RemoveDuplicatedCaseInSwitchRector;
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use Rector\DeadCode\Rector\Ternary\TernaryToBooleanOrFalseToBooleanAndRector;
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use Rector\DeadCode\Rector\TryCatch\RemoveDeadTryCatchRector;
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@ -97,5 +98,6 @@ return static function (RectorConfig $rectorConfig): void {
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RemoveNonExistingVarAnnotationRector::class,
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RemoveUnusedPromotedPropertyRector::class,
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RemoveLastReturnRector::class,
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RemoveJustPropertyFetchForAssignRector::class,
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]);
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};
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@ -712,3 +712,8 @@ parameters:
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-
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message: '#Method "refactor(Params|Return)\(\)" returns bool type, so the name should start with is/has/was#'
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path: rules/Php80/Rector/Class_/ConstantListClassToEnumRector.php
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# known values
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-
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message: '#Offset \d+ does not exist on array<PhpParser\\Node\\Stmt>\|null#'
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path: rules/DeadCode/Rector/StmtsAwareInterface/RemoveJustPropertyFetchForAssignRector.php
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@ -0,0 +1,17 @@
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<?php
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namespace Rector\Tests\DeadCode\Rector\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector\Fixture;
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final class SkipDifferentPropertyFetch
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{
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private $items = [];
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private $another = [];
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public function run()
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{
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$items = $this->another;
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$items[] = 1000;
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$this->items = $items ;
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}
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}
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<?php
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namespace Rector\Tests\DeadCode\Rector\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector\Fixture;
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final class SkipDifferentVariable
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{
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private $items = [];
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public function run()
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{
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$items = $this->items;
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$items[] = 1000;
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$this->items = $items2;
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}
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}
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<?php
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namespace Rector\Tests\DeadCode\Rector\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector\Fixture;
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final class SkipFourStmts
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{
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private $items = [];
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public function run()
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{
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$items = $this->items;
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$items[] = 1000;
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$items[] = 1000;
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$this->items = $items ;
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}
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}
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<?php
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namespace Rector\Tests\DeadCode\Rector\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector\Fixture;
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class SomeClass
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{
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private $items = [];
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public function run()
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{
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$items = $this->items;
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$items[] = 1000;
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$this->items = $items ;
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}
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}
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?>
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-----
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<?php
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namespace Rector\Tests\DeadCode\Rector\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector\Fixture;
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class SomeClass
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{
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private $items = [];
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public function run()
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{
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$this->items[] = 1000;
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}
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}
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?>
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@ -0,0 +1,33 @@
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<?php
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declare(strict_types=1);
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namespace Rector\Tests\DeadCode\Rector\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector;
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use Iterator;
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use Rector\Testing\PHPUnit\AbstractRectorTestCase;
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use Symplify\SmartFileSystem\SmartFileInfo;
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final class RemoveJustPropertyFetchForAssignRectorTest extends AbstractRectorTestCase
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{
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/**
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* @dataProvider provideData()
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*/
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public function test(SmartFileInfo $fileInfo): void
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{
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$this->doTestFileInfo($fileInfo);
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}
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/**
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* @return Iterator<SmartFileInfo>
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*/
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public function provideData(): Iterator
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{
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return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture');
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}
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public function provideConfigFilePath(): string
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{
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return __DIR__ . '/config/configured_rule.php';
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}
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}
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@ -0,0 +1,10 @@
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<?php
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declare(strict_types=1);
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use Rector\Config\RectorConfig;
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use Rector\DeadCode\Rector\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector;
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return static function (RectorConfig $rectorConfig): void {
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$rectorConfig->rule(RemoveJustPropertyFetchForAssignRector::class);
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};
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<?php
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declare(strict_types=1);
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namespace Rector\DeadCode\NodeAnalyzer;
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use PhpParser\Node\Expr\Assign;
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use PhpParser\Node\Expr\PropertyFetch;
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use PhpParser\Node\Expr\Variable;
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use PhpParser\Node\Stmt;
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use PhpParser\Node\Stmt\Expression;
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use Rector\Core\Contract\PhpParser\Node\StmtsAwareInterface;
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use Rector\Core\PhpParser\Comparing\NodeComparator;
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use Rector\DeadCode\ValueObject\VariableAndPropertyFetchAssign;
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final class JustPropertyFetchVariableAssignMatcher
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{
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public function __construct(
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private readonly NodeComparator $nodeComparator
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) {
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}
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public function match(StmtsAwareInterface $stmtsAware): ?VariableAndPropertyFetchAssign
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{
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$stmts = (array) $stmtsAware->stmts;
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$stmtCount = count($stmts);
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// must be exactly 3 stmts
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if ($stmtCount !== 3) {
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return null;
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}
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$firstVariableAndPropertyFetchAssign = $this->matchVariableAndPropertyFetchAssign($stmts[0]);
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if (! $firstVariableAndPropertyFetchAssign instanceof VariableAndPropertyFetchAssign) {
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return null;
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}
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$thirdVariableAndPropertyFetchAssign = $this->matchRevertedVariableAndPropertyFetchAssign($stmts[2]);
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if (! $thirdVariableAndPropertyFetchAssign instanceof VariableAndPropertyFetchAssign) {
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return null;
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}
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if (! $this->nodeComparator->areNodesEqual(
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$firstVariableAndPropertyFetchAssign->getPropertyFetch(),
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$thirdVariableAndPropertyFetchAssign->getPropertyFetch()
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)) {
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return null;
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}
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if (! $this->nodeComparator->areNodesEqual(
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$firstVariableAndPropertyFetchAssign->getVariable(),
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$thirdVariableAndPropertyFetchAssign->getVariable()
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)) {
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return null;
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}
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return $firstVariableAndPropertyFetchAssign;
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}
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private function matchVariableAndPropertyFetchAssign(Stmt $stmt): ?VariableAndPropertyFetchAssign
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{
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if (! $stmt instanceof Expression) {
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return null;
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}
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if (! $stmt->expr instanceof Assign) {
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return null;
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}
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$assign = $stmt->expr;
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if (! $assign->expr instanceof PropertyFetch) {
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return null;
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}
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if (! $assign->var instanceof Variable) {
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return null;
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}
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return new VariableAndPropertyFetchAssign($assign->var, $assign->expr);
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}
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private function matchRevertedVariableAndPropertyFetchAssign(Stmt $stmt): ?VariableAndPropertyFetchAssign
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{
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if (! $stmt instanceof Expression) {
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return null;
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}
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if (! $stmt->expr instanceof Assign) {
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return null;
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}
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$assign = $stmt->expr;
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if (! $assign->var instanceof PropertyFetch) {
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return null;
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}
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if (! $assign->expr instanceof Variable) {
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return null;
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}
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return new VariableAndPropertyFetchAssign($assign->expr, $assign->var);
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}
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}
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@ -0,0 +1,151 @@
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<?php
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declare(strict_types=1);
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namespace Rector\DeadCode\Rector\StmtsAwareInterface;
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use PhpParser\Node;
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use PhpParser\Node\Expr\ArrayDimFetch;
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use PhpParser\Node\Expr\Assign;
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use PhpParser\Node\Expr\Variable;
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use PhpParser\Node\Stmt\Expression;
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use Rector\Core\Contract\PhpParser\Node\StmtsAwareInterface;
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use Rector\Core\Rector\AbstractRector;
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use Rector\DeadCode\NodeAnalyzer\JustPropertyFetchVariableAssignMatcher;
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use Rector\DeadCode\ValueObject\VariableAndPropertyFetchAssign;
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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\StmtsAwareInterface\RemoveJustPropertyFetchForAssignRector\RemoveJustPropertyFetchForAssignRectorTest
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*/
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final class RemoveJustPropertyFetchForAssignRector extends AbstractRector
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{
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public function __construct(
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private readonly JustPropertyFetchVariableAssignMatcher $justPropertyFetchVariableAssignMatcher
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) {
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}
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public function getRuleDefinition(): RuleDefinition
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{
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return new RuleDefinition('Remove assign of property, just for value assign', [
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new CodeSample(
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<<<'CODE_SAMPLE'
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class SomeClass
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{
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private $items = [];
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public function run()
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{
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$items = $this->items;
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$items[] = 1000;
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$this->items = $items ;
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}
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}
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CODE_SAMPLE
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,
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<<<'CODE_SAMPLE'
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class SomeClass
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{
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private $items = [];
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public function run()
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{
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$this->items[] = 1000;
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}
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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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/**
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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 [StmtsAwareInterface::class];
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}
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/**
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* @param StmtsAwareInterface $node
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*/
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public function refactor(Node $node): ?Node
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{
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$variableAndPropertyFetchAssign = $this->justPropertyFetchVariableAssignMatcher->match($node);
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if (! $variableAndPropertyFetchAssign instanceof VariableAndPropertyFetchAssign) {
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return null;
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}
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$secondStmt = $node->stmts[1];
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if (! $secondStmt instanceof Expression) {
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return null;
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}
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if (! $secondStmt->expr instanceof Assign) {
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return null;
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}
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$middleAssign = $secondStmt->expr;
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if ($middleAssign->var instanceof Variable) {
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return $this->refactorToVariableAssign($middleAssign, $variableAndPropertyFetchAssign, $node);
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}
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if ($middleAssign->var instanceof ArrayDimFetch) {
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return $this->removeToArrayDimFetchAssign($middleAssign, $variableAndPropertyFetchAssign, $node);
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}
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return null;
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}
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private function refactorToVariableAssign(
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Assign $middleAssign,
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VariableAndPropertyFetchAssign $variableAndPropertyFetchAssign,
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StmtsAwareInterface $stmtsAware
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): StmtsAwareInterface|Node|null {
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$middleVariable = $middleAssign->var;
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if (! $this->nodeComparator->areNodesEqual($middleVariable, $variableAndPropertyFetchAssign->getVariable())) {
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return null;
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}
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// remove just-assign stmts
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unset($stmtsAware->stmts[0]);
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unset($stmtsAware->stmts[2]);
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$middleAssign->var = $variableAndPropertyFetchAssign->getPropertyFetch();
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return $stmtsAware;
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}
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private function removeToArrayDimFetchAssign(
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Assign $middleAssign,
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VariableAndPropertyFetchAssign $variableAndPropertyFetchAssign,
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StmtsAwareInterface $stmtsAware
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): StmtsAwareInterface|null {
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$middleArrayDimFetch = $middleAssign->var;
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if (! $middleArrayDimFetch instanceof ArrayDimFetch) {
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return null;
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}
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if ($middleArrayDimFetch->var instanceof Variable) {
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$middleNestedVariable = $middleArrayDimFetch->var;
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if (! $this->nodeComparator->areNodesEqual(
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$middleNestedVariable,
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$variableAndPropertyFetchAssign->getVariable()
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)) {
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return null;
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}
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$middleArrayDimFetch->var = $variableAndPropertyFetchAssign->getPropertyFetch();
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}
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// remove just-assign stmts
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unset($stmtsAware->stmts[0]);
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unset($stmtsAware->stmts[2]);
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return $stmtsAware;
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}
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}
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@ -0,0 +1,27 @@
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<?php
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declare(strict_types=1);
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namespace Rector\DeadCode\ValueObject;
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use PhpParser\Node\Expr\PropertyFetch;
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use PhpParser\Node\Expr\Variable;
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final class VariableAndPropertyFetchAssign
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{
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public function __construct(
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private readonly Variable $variable,
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private readonly PropertyFetch $propertyFetch
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) {
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}
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public function getVariable(): Variable
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{
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return $this->variable;
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}
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public function getPropertyFetch(): PropertyFetch
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{
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return $this->propertyFetch;
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}
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}
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