mirror of https://github.com/rectorphp/rector.git
209 lines
6.6 KiB
PHP
209 lines
6.6 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\CodeQuality\Rector\FunctionLike;
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use PhpParser\Node;
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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\Stmt;
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use PhpParser\Node\Stmt\Class_;
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use PhpParser\Node\Stmt\ClassMethod;
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use PhpParser\Node\Stmt\If_;
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use PhpParser\Node\Stmt\Property;
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use PhpParser\NodeTraverser;
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use PHPStan\Type\MixedType;
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use PHPStan\Type\NullType;
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use PHPStan\Type\Type;
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use Rector\Core\Rector\AbstractRector;
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use Rector\Core\ValueObject\MethodName;
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use Rector\NodeTypeResolver\PHPStan\Type\StaticTypeAnalyzer;
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use Rector\NodeTypeResolver\PHPStan\Type\TypeFactory;
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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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* @changelog https://phpstan.org/r/e909844a-084e-427e-92ac-fed3c2aeabab
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*
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* @see \Rector\Tests\CodeQuality\Rector\FunctionLike\RemoveAlwaysTrueConditionSetInConstructorRector\RemoveAlwaysTrueConditionSetInConstructorRectorTest
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*/
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final class RemoveAlwaysTrueConditionSetInConstructorRector extends AbstractRector
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{
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/**
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* @readonly
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* @var \Rector\NodeTypeResolver\PHPStan\Type\StaticTypeAnalyzer
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*/
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private $staticTypeAnalyzer;
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/**
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* @readonly
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* @var \Rector\NodeTypeResolver\PHPStan\Type\TypeFactory
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*/
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private $typeFactory;
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public function __construct(StaticTypeAnalyzer $staticTypeAnalyzer, TypeFactory $typeFactory)
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{
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$this->staticTypeAnalyzer = $staticTypeAnalyzer;
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$this->typeFactory = $typeFactory;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('If conditions is always true, perform the content right away', [new CodeSample(<<<'CODE_SAMPLE'
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final class SomeClass
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{
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private $value;
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public function __construct(stdClass $value)
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{
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$this->value = $value;
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}
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public function go()
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{
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if ($this->value) {
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return 'yes';
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}
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}
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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final class SomeClass
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{
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private $value;
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public function __construct(stdClass $value)
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{
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$this->value = $value;
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}
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public function go()
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{
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return 'yes';
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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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* @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 [If_::class];
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}
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/**
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* @param If_ $node
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* @return null|If_|Stmt[]
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*/
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public function refactor(Node $node)
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{
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$ifStmt = $this->matchTruableIf($node);
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if (!$ifStmt instanceof If_) {
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return null;
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}
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if ($ifStmt->stmts === []) {
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$this->removeNode($ifStmt);
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return $ifStmt;
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}
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return $ifStmt->stmts;
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}
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private function matchTruableIf(If_ $if) : ?\PhpParser\Node\Stmt\If_
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{
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// just one if
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if ($if->elseifs !== []) {
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return null;
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}
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// there is some else
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if ($if->else !== null) {
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return null;
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}
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// only property fetch, because of constructor set
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if (!$if->cond instanceof PropertyFetch) {
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return null;
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}
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$propertyFetchType = $this->resolvePropertyFetchType($if->cond);
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if (!$this->staticTypeAnalyzer->isAlwaysTruableType($propertyFetchType)) {
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return null;
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}
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return $if;
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}
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private function resolvePropertyFetchType(PropertyFetch $propertyFetch) : Type
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{
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$classLike = $this->betterNodeFinder->findParentType($propertyFetch, Class_::class);
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if (!$classLike instanceof Class_) {
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return new MixedType();
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}
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$propertyName = $this->getName($propertyFetch);
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if ($propertyName === null) {
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return new MixedType();
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}
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$property = $classLike->getProperty($propertyName);
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if (!$property instanceof Property) {
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return new MixedType();
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}
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// anything but private can be changed from outer scope
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if (!$property->isPrivate()) {
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return new MixedType();
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}
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// set in constructor + changed in class
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$propertyType = $this->resolvePropertyTypeAfterConstructor($classLike, $propertyName);
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$resolvedTypes = [$propertyType];
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$defaultValue = $property->props[0]->default;
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if ($defaultValue !== null) {
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$resolvedTypes[] = $this->getType($defaultValue);
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}
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$resolveAssignedType = $this->resolveAssignedTypeInStmtsByPropertyName($classLike->stmts, $propertyName);
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if ($resolveAssignedType !== null) {
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$resolvedTypes[] = $resolveAssignedType;
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}
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return $this->typeFactory->createMixedPassedOrUnionTypeAndKeepConstant($resolvedTypes);
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}
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private function resolvePropertyTypeAfterConstructor(Class_ $class, string $propertyName) : Type
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{
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$propertyTypeFromConstructor = null;
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$constructClassMethod = $class->getMethod(MethodName::CONSTRUCT);
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if ($constructClassMethod !== null) {
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$propertyTypeFromConstructor = $this->resolveAssignedTypeInStmtsByPropertyName((array) $constructClassMethod->stmts, $propertyName);
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}
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if ($propertyTypeFromConstructor !== null) {
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return $propertyTypeFromConstructor;
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}
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// undefined property is null by default
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return new NullType();
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}
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/**
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* @param Stmt[] $stmts
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*/
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private function resolveAssignedTypeInStmtsByPropertyName(array $stmts, string $propertyName) : ?Type
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{
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$resolvedTypes = [];
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$this->traverseNodesWithCallable($stmts, function (Node $node) use($propertyName, &$resolvedTypes) : ?int {
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if ($node instanceof ClassMethod && $this->isName($node, MethodName::CONSTRUCT)) {
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return NodeTraverser::DONT_TRAVERSE_CURRENT_AND_CHILDREN;
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}
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if (!$this->isPropertyFetchAssignOfPropertyName($node, $propertyName)) {
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return null;
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}
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if (!$node instanceof Assign) {
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return null;
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}
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$resolvedTypes[] = $this->getType($node->expr);
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return null;
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});
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if ($resolvedTypes === []) {
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return null;
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}
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return $this->typeFactory->createMixedPassedOrUnionTypeAndKeepConstant($resolvedTypes);
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}
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/**
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* E.g. $this->{value} = x
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*/
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private function isPropertyFetchAssignOfPropertyName(Node $node, string $propertyName) : bool
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{
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if (!$node instanceof Assign) {
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return \false;
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}
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if (!$node->var instanceof PropertyFetch) {
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return \false;
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}
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return $this->isName($node->var, $propertyName);
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}
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}
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