mirror of https://github.com/rectorphp/rector.git
215 lines
7.7 KiB
PHP
215 lines
7.7 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\TypeDeclaration\Rector\FunctionLike;
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use PhpParser\Node;
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use PhpParser\Node\Expr;
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use PhpParser\Node\Expr\Closure;
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use PhpParser\Node\Expr\Yield_;
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use PhpParser\Node\Expr\YieldFrom;
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use PhpParser\Node\FunctionLike;
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use PhpParser\Node\Identifier;
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use PhpParser\Node\Name;
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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\Expression;
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use PhpParser\Node\Stmt\Function_;
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use PhpParser\NodeTraverser;
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use PHPStan\Analyser\Scope;
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use PHPStan\Type\MixedType;
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use PHPStan\Type\Type;
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use Rector\NodeTypeResolver\PHPStan\Type\TypeFactory;
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use Rector\PhpDocParser\NodeTraverser\SimpleCallableNodeTraverser;
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use Rector\PHPStanStaticTypeMapper\Enum\TypeKind;
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use Rector\Rector\AbstractScopeAwareRector;
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use Rector\StaticTypeMapper\StaticTypeMapper;
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use Rector\StaticTypeMapper\ValueObject\Type\FullyQualifiedGenericObjectType;
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use Rector\StaticTypeMapper\ValueObject\Type\FullyQualifiedObjectType;
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use Rector\ValueObject\PhpVersionFeature;
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use Rector\VendorLocker\NodeVendorLocker\ClassMethodReturnTypeOverrideGuard;
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use Rector\VersionBonding\Contract\MinPhpVersionInterface;
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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\TypeDeclaration\Rector\FunctionLike\AddReturnTypeDeclarationFromYieldsRector\AddReturnTypeDeclarationFromYieldsRectorTest
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*/
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final class AddReturnTypeDeclarationFromYieldsRector extends AbstractScopeAwareRector implements MinPhpVersionInterface
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{
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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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/**
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* @readonly
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* @var \Rector\PhpDocParser\NodeTraverser\SimpleCallableNodeTraverser
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*/
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private $simpleCallableNodeTraverser;
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/**
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* @readonly
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* @var \Rector\StaticTypeMapper\StaticTypeMapper
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*/
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private $staticTypeMapper;
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/**
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* @readonly
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* @var \Rector\VendorLocker\NodeVendorLocker\ClassMethodReturnTypeOverrideGuard
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*/
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private $classMethodReturnTypeOverrideGuard;
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public function __construct(TypeFactory $typeFactory, SimpleCallableNodeTraverser $simpleCallableNodeTraverser, StaticTypeMapper $staticTypeMapper, ClassMethodReturnTypeOverrideGuard $classMethodReturnTypeOverrideGuard)
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{
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$this->typeFactory = $typeFactory;
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$this->simpleCallableNodeTraverser = $simpleCallableNodeTraverser;
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$this->staticTypeMapper = $staticTypeMapper;
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$this->classMethodReturnTypeOverrideGuard = $classMethodReturnTypeOverrideGuard;
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}
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Add return type declarations from yields', [new CodeSample(<<<'CODE_SAMPLE'
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class SomeClass
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{
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public function provide()
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{
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yield 1;
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}
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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class SomeClass
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{
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/**
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* @return Iterator<int>
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*/
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public function provide(): Iterator
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{
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yield 1;
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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 [Function_::class, ClassMethod::class, Closure::class];
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}
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/**
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* @param Function_|ClassMethod|Closure $node
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*/
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public function refactorWithScope(Node $node, Scope $scope) : ?Node
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{
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$yieldNodes = $this->findCurrentScopeYieldNodes($node);
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if ($yieldNodes === []) {
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return null;
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}
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// skip already filled type
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if ($node->returnType instanceof Node && $this->isNames($node->returnType, ['Iterator', 'Generator', 'Traversable', 'iterable'])) {
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return null;
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}
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if ($node instanceof ClassMethod && $this->classMethodReturnTypeOverrideGuard->shouldSkipClassMethod($node, $scope)) {
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return null;
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}
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$yieldType = $this->resolveYieldType($yieldNodes, $node);
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$returnTypeNode = $this->staticTypeMapper->mapPHPStanTypeToPhpParserNode($yieldType, TypeKind::RETURN);
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if (!$returnTypeNode instanceof Node) {
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return null;
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}
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$node->returnType = $returnTypeNode;
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return $node;
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}
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public function provideMinPhpVersion() : int
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{
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return PhpVersionFeature::SCALAR_TYPES;
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}
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/**
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* @return Yield_[]|YieldFrom[]
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*/
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private function findCurrentScopeYieldNodes(FunctionLike $functionLike) : array
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{
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$yieldNodes = [];
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$this->simpleCallableNodeTraverser->traverseNodesWithCallable((array) $functionLike->getStmts(), static function (Node $node) use(&$yieldNodes) : ?int {
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// skip anonymous class and inner function
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if ($node instanceof Class_) {
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return NodeTraverser::DONT_TRAVERSE_CURRENT_AND_CHILDREN;
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}
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// skip nested scope
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if ($node instanceof FunctionLike) {
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return NodeTraverser::DONT_TRAVERSE_CURRENT_AND_CHILDREN;
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}
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if ($node instanceof Stmt && !$node instanceof Expression) {
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$yieldNodes = [];
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return NodeTraverser::STOP_TRAVERSAL;
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}
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if (!$node instanceof Yield_ && !$node instanceof YieldFrom) {
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return null;
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}
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$yieldNodes[] = $node;
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return null;
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});
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return $yieldNodes;
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}
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/**
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* @param \PhpParser\Node\Expr\Yield_|\PhpParser\Node\Expr\YieldFrom $yield
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*/
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private function resolveYieldValue($yield) : ?Expr
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{
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if ($yield instanceof Yield_) {
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return $yield->value;
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}
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return $yield->expr;
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}
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/**
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* @param array<Yield_|YieldFrom> $yieldNodes
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* @return Type[]
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*/
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private function resolveYieldedTypes(array $yieldNodes) : array
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{
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$yieldedTypes = [];
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foreach ($yieldNodes as $yieldNode) {
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$value = $this->resolveYieldValue($yieldNode);
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if (!$value instanceof Expr) {
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// one of the yields is empty
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return [];
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}
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$resolvedType = $this->nodeTypeResolver->getType($value);
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if ($resolvedType instanceof MixedType) {
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continue;
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}
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$yieldedTypes[] = $resolvedType;
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}
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return $yieldedTypes;
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}
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/**
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* @param array<Yield_|YieldFrom> $yieldNodes
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* @param \PhpParser\Node\Stmt\ClassMethod|\PhpParser\Node\Stmt\Function_|\PhpParser\Node\Expr\Closure $functionLike
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* @return \Rector\StaticTypeMapper\ValueObject\Type\FullyQualifiedObjectType|\Rector\StaticTypeMapper\ValueObject\Type\FullyQualifiedGenericObjectType
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*/
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private function resolveYieldType(array $yieldNodes, $functionLike)
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{
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$yieldedTypes = $this->resolveYieldedTypes($yieldNodes);
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$className = $this->resolveClassName($functionLike);
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if ($yieldedTypes === []) {
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return new FullyQualifiedObjectType($className);
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}
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$yieldedTypes = $this->typeFactory->createMixedPassedOrUnionType($yieldedTypes);
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return new FullyQualifiedGenericObjectType($className, [$yieldedTypes]);
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}
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/**
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* @param \PhpParser\Node\Stmt\Function_|\PhpParser\Node\Stmt\ClassMethod|\PhpParser\Node\Expr\Closure $functionLike
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*/
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private function resolveClassName($functionLike) : string
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{
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$returnTypeNode = $functionLike->getReturnType();
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if ($returnTypeNode instanceof Identifier && $returnTypeNode->name === 'iterable') {
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return 'Iterator';
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}
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if ($returnTypeNode instanceof Name && !$this->nodeNameResolver->isName($returnTypeNode, 'Generator')) {
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return $this->nodeNameResolver->getName($returnTypeNode);
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}
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return 'Generator';
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}
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}
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