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TypeSpecifier.php
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TypeSpecifier.php
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<?php declare(strict_types = 1);
namespace PHPStan\Analyser;
use PhpParser\Node;
use PhpParser\Node\Expr;
use PhpParser\Node\Expr\ArrayDimFetch;
use PhpParser\Node\Expr\BinaryOp\BooleanAnd;
use PhpParser\Node\Expr\BinaryOp\BooleanOr;
use PhpParser\Node\Expr\BinaryOp\LogicalAnd;
use PhpParser\Node\Expr\BinaryOp\LogicalOr;
use PhpParser\Node\Expr\ClassConstFetch;
use PhpParser\Node\Expr\ConstFetch;
use PhpParser\Node\Expr\FuncCall;
use PhpParser\Node\Expr\Instanceof_;
use PhpParser\Node\Expr\MethodCall;
use PhpParser\Node\Expr\PropertyFetch;
use PhpParser\Node\Expr\StaticCall;
use PhpParser\Node\Expr\StaticPropertyFetch;
use PhpParser\Node\Name;
use PHPStan\Node\Expr\AlwaysRememberedExpr;
use PHPStan\Node\IssetExpr;
use PHPStan\Node\Printer\ExprPrinter;
use PHPStan\Reflection\Assertions;
use PHPStan\Reflection\ParametersAcceptor;
use PHPStan\Reflection\ParametersAcceptorSelector;
use PHPStan\Reflection\ParametersAcceptorWithPhpDocs;
use PHPStan\Reflection\ReflectionProvider;
use PHPStan\Reflection\ResolvedFunctionVariant;
use PHPStan\ShouldNotHappenException;
use PHPStan\TrinaryLogic;
use PHPStan\Type\Accessory\AccessoryArrayListType;
use PHPStan\Type\Accessory\AccessoryNonEmptyStringType;
use PHPStan\Type\Accessory\AccessoryNonFalsyStringType;
use PHPStan\Type\Accessory\HasOffsetType;
use PHPStan\Type\Accessory\HasPropertyType;
use PHPStan\Type\Accessory\NonEmptyArrayType;
use PHPStan\Type\ArrayType;
use PHPStan\Type\BooleanType;
use PHPStan\Type\ConditionalTypeForParameter;
use PHPStan\Type\Constant\ConstantArrayTypeBuilder;
use PHPStan\Type\Constant\ConstantBooleanType;
use PHPStan\Type\Constant\ConstantIntegerType;
use PHPStan\Type\Constant\ConstantStringType;
use PHPStan\Type\ConstantScalarType;
use PHPStan\Type\FloatType;
use PHPStan\Type\FunctionTypeSpecifyingExtension;
use PHPStan\Type\Generic\GenericClassStringType;
use PHPStan\Type\Generic\TemplateType;
use PHPStan\Type\Generic\TemplateTypeHelper;
use PHPStan\Type\Generic\TemplateTypeVariance;
use PHPStan\Type\Generic\TemplateTypeVarianceMap;
use PHPStan\Type\IntegerRangeType;
use PHPStan\Type\IntegerType;
use PHPStan\Type\IntersectionType;
use PHPStan\Type\MethodTypeSpecifyingExtension;
use PHPStan\Type\MixedType;
use PHPStan\Type\NeverType;
use PHPStan\Type\NonexistentParentClassType;
use PHPStan\Type\NullType;
use PHPStan\Type\ObjectType;
use PHPStan\Type\ObjectWithoutClassType;
use PHPStan\Type\ResourceType;
use PHPStan\Type\StaticMethodTypeSpecifyingExtension;
use PHPStan\Type\StaticType;
use PHPStan\Type\StaticTypeFactory;
use PHPStan\Type\StringType;
use PHPStan\Type\Type;
use PHPStan\Type\TypeCombinator;
use PHPStan\Type\TypeTraverser;
use PHPStan\Type\UnionType;
use function array_key_exists;
use function array_map;
use function array_merge;
use function array_reverse;
use function array_shift;
use function count;
use function in_array;
use function is_string;
use function strtolower;
use function substr;
class TypeSpecifier
{
/** @var MethodTypeSpecifyingExtension[][]|null */
private ?array $methodTypeSpecifyingExtensionsByClass = null;
/** @var StaticMethodTypeSpecifyingExtension[][]|null */
private ?array $staticMethodTypeSpecifyingExtensionsByClass = null;
/**
* @param FunctionTypeSpecifyingExtension[] $functionTypeSpecifyingExtensions
* @param MethodTypeSpecifyingExtension[] $methodTypeSpecifyingExtensions
* @param StaticMethodTypeSpecifyingExtension[] $staticMethodTypeSpecifyingExtensions
*/
public function __construct(
private ExprPrinter $exprPrinter,
private ReflectionProvider $reflectionProvider,
private array $functionTypeSpecifyingExtensions,
private array $methodTypeSpecifyingExtensions,
private array $staticMethodTypeSpecifyingExtensions,
private bool $rememberPossiblyImpureFunctionValues,
)
{
foreach (array_merge($functionTypeSpecifyingExtensions, $methodTypeSpecifyingExtensions, $staticMethodTypeSpecifyingExtensions) as $extension) {
if (!($extension instanceof TypeSpecifierAwareExtension)) {
continue;
}
$extension->setTypeSpecifier($this);
}
}
/** @api */
public function specifyTypesInCondition(
Scope $scope,
Expr $expr,
TypeSpecifierContext $context,
?Expr $rootExpr = null,
): SpecifiedTypes
{
$rootExpr ??= $expr;
if ($expr instanceof Expr\CallLike && $expr->isFirstClassCallable()) {
return new SpecifiedTypes([], [], false, [], $rootExpr);
}
if ($expr instanceof Instanceof_) {
$exprNode = $expr->expr;
if ($expr->class instanceof Name) {
$className = (string) $expr->class;
$lowercasedClassName = strtolower($className);
if ($lowercasedClassName === 'self' && $scope->isInClass()) {
$type = new ObjectType($scope->getClassReflection()->getName());
} elseif ($lowercasedClassName === 'static' && $scope->isInClass()) {
$type = new StaticType($scope->getClassReflection());
} elseif ($lowercasedClassName === 'parent') {
if (
$scope->isInClass()
&& $scope->getClassReflection()->getParentClass() !== null
) {
$type = new ObjectType($scope->getClassReflection()->getParentClass()->getName());
} else {
$type = new NonexistentParentClassType();
}
} else {
$type = new ObjectType($className);
}
return $this->create($exprNode, $type, $context, false, $scope, $rootExpr);
}
$classType = $scope->getType($expr->class);
$type = TypeTraverser::map($classType, static function (Type $type, callable $traverse): Type {
if ($type instanceof UnionType || $type instanceof IntersectionType) {
return $traverse($type);
}
if ($type->getObjectClassNames() !== []) {
return $type;
}
if ($type instanceof GenericClassStringType) {
return $type->getGenericType();
}
if ($type instanceof ConstantStringType) {
return new ObjectType($type->getValue());
}
return new MixedType();
});
if (!$type->isSuperTypeOf(new MixedType())->yes()) {
if ($context->true()) {
$type = TypeCombinator::intersect(
$type,
new ObjectWithoutClassType(),
);
return $this->create($exprNode, $type, $context, false, $scope, $rootExpr);
} elseif ($context->false()) {
$exprType = $scope->getType($expr->expr);
if (!$type->isSuperTypeOf($exprType)->yes()) {
return $this->create($exprNode, $type, $context, false, $scope, $rootExpr);
}
}
}
if ($context->true()) {
return $this->create($exprNode, new ObjectWithoutClassType(), $context, false, $scope, $rootExpr);
}
} elseif ($expr instanceof Node\Expr\BinaryOp\Identical) {
return $this->resolveIdentical($expr, $scope, $context, $rootExpr);
} elseif ($expr instanceof Node\Expr\BinaryOp\NotIdentical) {
return $this->specifyTypesInCondition(
$scope,
new Node\Expr\BooleanNot(new Node\Expr\BinaryOp\Identical($expr->left, $expr->right)),
$context,
$rootExpr,
);
} elseif ($expr instanceof Node\Expr\BinaryOp\Equal) {
return $this->resolveEqual($expr, $scope, $context, $rootExpr);
} elseif ($expr instanceof Node\Expr\BinaryOp\NotEqual) {
return $this->specifyTypesInCondition(
$scope,
new Node\Expr\BooleanNot(new Node\Expr\BinaryOp\Equal($expr->left, $expr->right)),
$context,
$rootExpr,
);
} elseif ($expr instanceof Node\Expr\BinaryOp\Smaller || $expr instanceof Node\Expr\BinaryOp\SmallerOrEqual) {
if (
$expr->left instanceof FuncCall
&& count($expr->left->getArgs()) === 1
&& $expr->left->name instanceof Name
&& in_array(strtolower((string) $expr->left->name), ['count', 'sizeof', 'strlen'], true)
&& (
!$expr->right instanceof FuncCall
|| !$expr->right->name instanceof Name
|| !in_array(strtolower((string) $expr->right->name), ['count', 'sizeof', 'strlen'], true)
)
) {
$inverseOperator = $expr instanceof Node\Expr\BinaryOp\Smaller
? new Node\Expr\BinaryOp\SmallerOrEqual($expr->right, $expr->left)
: new Node\Expr\BinaryOp\Smaller($expr->right, $expr->left);
return $this->specifyTypesInCondition(
$scope,
new Node\Expr\BooleanNot($inverseOperator),
$context,
$rootExpr,
);
}
$orEqual = $expr instanceof Node\Expr\BinaryOp\SmallerOrEqual;
$offset = $orEqual ? 0 : 1;
$leftType = $scope->getType($expr->left);
$result = new SpecifiedTypes([], [], false, [], $rootExpr);
if (
!$context->null()
&& $expr->right instanceof FuncCall
&& count($expr->right->getArgs()) === 1
&& $expr->right->name instanceof Name
&& in_array(strtolower((string) $expr->right->name), ['count', 'sizeof'], true)
&& $leftType->isInteger()->yes()
) {
if (
$context->truthy() && (IntegerRangeType::createAllGreaterThanOrEqualTo(1 - $offset)->isSuperTypeOf($leftType)->yes())
|| ($context->falsey() && (new ConstantIntegerType(1 - $offset))->isSuperTypeOf($leftType)->yes())
) {
$argType = $scope->getType($expr->right->getArgs()[0]->value);
if ($argType->isArray()->yes()) {
$newType = new NonEmptyArrayType();
if ($context->truthy() && $argType->isList()->yes()) {
$newType = AccessoryArrayListType::intersectWith($newType);
}
$result = $result->unionWith(
$this->create($expr->right->getArgs()[0]->value, $newType, $context, false, $scope, $rootExpr),
);
}
}
}
if (
!$context->null()
&& $expr->right instanceof FuncCall
&& count($expr->right->getArgs()) === 1
&& $expr->right->name instanceof Name
&& strtolower((string) $expr->right->name) === 'strlen'
&& $leftType->isInteger()->yes()
) {
if (
$context->truthy() && (IntegerRangeType::createAllGreaterThanOrEqualTo(1 - $offset)->isSuperTypeOf($leftType)->yes())
|| ($context->falsey() && (new ConstantIntegerType(1 - $offset))->isSuperTypeOf($leftType)->yes())
) {
$argType = $scope->getType($expr->right->getArgs()[0]->value);
if ($argType->isString()->yes()) {
$accessory = new AccessoryNonEmptyStringType();
if ($leftType instanceof ConstantIntegerType && $leftType->getValue() >= 2) {
$accessory = new AccessoryNonFalsyStringType();
}
$result = $result->unionWith($this->create($expr->right->getArgs()[0]->value, $accessory, $context, false, $scope, $rootExpr));
}
}
}
if ($leftType instanceof ConstantIntegerType) {
if ($expr->right instanceof Expr\PostInc) {
$result = $result->unionWith($this->createRangeTypes(
$rootExpr,
$expr->right->var,
IntegerRangeType::fromInterval($leftType->getValue(), null, $offset + 1),
$context,
));
} elseif ($expr->right instanceof Expr\PostDec) {
$result = $result->unionWith($this->createRangeTypes(
$rootExpr,
$expr->right->var,
IntegerRangeType::fromInterval($leftType->getValue(), null, $offset - 1),
$context,
));
} elseif ($expr->right instanceof Expr\PreInc || $expr->right instanceof Expr\PreDec) {
$result = $result->unionWith($this->createRangeTypes(
$rootExpr,
$expr->right->var,
IntegerRangeType::fromInterval($leftType->getValue(), null, $offset),
$context,
));
}
}
$rightType = $scope->getType($expr->right);
if ($rightType instanceof ConstantIntegerType) {
if ($expr->left instanceof Expr\PostInc) {
$result = $result->unionWith($this->createRangeTypes(
$rootExpr,
$expr->left->var,
IntegerRangeType::fromInterval(null, $rightType->getValue(), -$offset + 1),
$context,
));
} elseif ($expr->left instanceof Expr\PostDec) {
$result = $result->unionWith($this->createRangeTypes(
$rootExpr,
$expr->left->var,
IntegerRangeType::fromInterval(null, $rightType->getValue(), -$offset - 1),
$context,
));
} elseif ($expr->left instanceof Expr\PreInc || $expr->left instanceof Expr\PreDec) {
$result = $result->unionWith($this->createRangeTypes(
$rootExpr,
$expr->left->var,
IntegerRangeType::fromInterval(null, $rightType->getValue(), -$offset),
$context,
));
}
}
if ($context->true()) {
if (!$expr->left instanceof Node\Scalar) {
$result = $result->unionWith(
$this->create(
$expr->left,
$orEqual ? $rightType->getSmallerOrEqualType() : $rightType->getSmallerType(),
TypeSpecifierContext::createTruthy(),
false,
$scope,
$rootExpr,
),
);
}
if (!$expr->right instanceof Node\Scalar) {
$result = $result->unionWith(
$this->create(
$expr->right,
$orEqual ? $leftType->getGreaterOrEqualType() : $leftType->getGreaterType(),
TypeSpecifierContext::createTruthy(),
false,
$scope,
$rootExpr,
),
);
}
} elseif ($context->false()) {
if (!$expr->left instanceof Node\Scalar) {
$result = $result->unionWith(
$this->create(
$expr->left,
$orEqual ? $rightType->getGreaterType() : $rightType->getGreaterOrEqualType(),
TypeSpecifierContext::createTruthy(),
false,
$scope,
$rootExpr,
),
);
}
if (!$expr->right instanceof Node\Scalar) {
$result = $result->unionWith(
$this->create(
$expr->right,
$orEqual ? $leftType->getSmallerType() : $leftType->getSmallerOrEqualType(),
TypeSpecifierContext::createTruthy(),
false,
$scope,
$rootExpr,
),
);
}
}
return $result;
} elseif ($expr instanceof Node\Expr\BinaryOp\Greater) {
return $this->specifyTypesInCondition($scope, new Expr\BinaryOp\Smaller($expr->right, $expr->left), $context, $rootExpr);
} elseif ($expr instanceof Node\Expr\BinaryOp\GreaterOrEqual) {
return $this->specifyTypesInCondition($scope, new Expr\BinaryOp\SmallerOrEqual($expr->right, $expr->left), $context, $rootExpr);
} elseif ($expr instanceof FuncCall && $expr->name instanceof Name) {
if ($this->reflectionProvider->hasFunction($expr->name, $scope)) {
$functionReflection = $this->reflectionProvider->getFunction($expr->name, $scope);
foreach ($this->getFunctionTypeSpecifyingExtensions() as $extension) {
if (!$extension->isFunctionSupported($functionReflection, $expr, $context)) {
continue;
}
return $extension->specifyTypes($functionReflection, $expr, $scope, $context);
}
// lazy create parametersAcceptor, as creation can be expensive
$parametersAcceptor = null;
if (count($expr->getArgs()) > 0) {
$parametersAcceptor = ParametersAcceptorSelector::selectFromArgs($scope, $expr->getArgs(), $functionReflection->getVariants(), $functionReflection->getNamedArgumentsVariants());
$specifiedTypes = $this->specifyTypesFromConditionalReturnType($context, $expr, $parametersAcceptor, $scope);
if ($specifiedTypes !== null) {
return $specifiedTypes;
}
}
$assertions = $functionReflection->getAsserts();
if ($assertions->getAll() !== []) {
$parametersAcceptor ??= ParametersAcceptorSelector::selectFromArgs($scope, $expr->getArgs(), $functionReflection->getVariants(), $functionReflection->getNamedArgumentsVariants());
$asserts = $assertions->mapTypes(static fn (Type $type) => TemplateTypeHelper::resolveTemplateTypes(
$type,
$parametersAcceptor->getResolvedTemplateTypeMap(),
$parametersAcceptor instanceof ParametersAcceptorWithPhpDocs ? $parametersAcceptor->getCallSiteVarianceMap() : TemplateTypeVarianceMap::createEmpty(),
TemplateTypeVariance::createInvariant(),
));
$specifiedTypes = $this->specifyTypesFromAsserts($context, $expr, $asserts, $parametersAcceptor, $scope);
if ($specifiedTypes !== null) {
return $specifiedTypes;
}
}
}
return $this->handleDefaultTruthyOrFalseyContext($context, $rootExpr, $expr, $scope);
} elseif ($expr instanceof MethodCall && $expr->name instanceof Node\Identifier) {
$methodCalledOnType = $scope->getType($expr->var);
$methodReflection = $scope->getMethodReflection($methodCalledOnType, $expr->name->name);
if ($methodReflection !== null) {
$referencedClasses = $methodCalledOnType->getObjectClassNames();
if (
count($referencedClasses) === 1
&& $this->reflectionProvider->hasClass($referencedClasses[0])
) {
$methodClassReflection = $this->reflectionProvider->getClass($referencedClasses[0]);
foreach ($this->getMethodTypeSpecifyingExtensionsForClass($methodClassReflection->getName()) as $extension) {
if (!$extension->isMethodSupported($methodReflection, $expr, $context)) {
continue;
}
return $extension->specifyTypes($methodReflection, $expr, $scope, $context);
}
}
// lazy create parametersAcceptor, as creation can be expensive
$parametersAcceptor = null;
if (count($expr->getArgs()) > 0) {
$parametersAcceptor = ParametersAcceptorSelector::selectFromArgs($scope, $expr->getArgs(), $methodReflection->getVariants(), $methodReflection->getNamedArgumentsVariants());
$specifiedTypes = $this->specifyTypesFromConditionalReturnType($context, $expr, $parametersAcceptor, $scope);
if ($specifiedTypes !== null) {
return $specifiedTypes;
}
}
$assertions = $methodReflection->getAsserts();
if ($assertions->getAll() !== []) {
$parametersAcceptor ??= ParametersAcceptorSelector::selectFromArgs($scope, $expr->getArgs(), $methodReflection->getVariants(), $methodReflection->getNamedArgumentsVariants());
$asserts = $assertions->mapTypes(static fn (Type $type) => TemplateTypeHelper::resolveTemplateTypes(
$type,
$parametersAcceptor->getResolvedTemplateTypeMap(),
$parametersAcceptor instanceof ParametersAcceptorWithPhpDocs ? $parametersAcceptor->getCallSiteVarianceMap() : TemplateTypeVarianceMap::createEmpty(),
TemplateTypeVariance::createInvariant(),
));
$specifiedTypes = $this->specifyTypesFromAsserts($context, $expr, $asserts, $parametersAcceptor, $scope);
if ($specifiedTypes !== null) {
return $specifiedTypes;
}
}
}
return $this->handleDefaultTruthyOrFalseyContext($context, $rootExpr, $expr, $scope);
} elseif ($expr instanceof StaticCall && $expr->name instanceof Node\Identifier) {
if ($expr->class instanceof Name) {
$calleeType = $scope->resolveTypeByName($expr->class);
} else {
$calleeType = $scope->getType($expr->class);
}
$staticMethodReflection = $scope->getMethodReflection($calleeType, $expr->name->name);
if ($staticMethodReflection !== null) {
$referencedClasses = $calleeType->getObjectClassNames();
if (
count($referencedClasses) === 1
&& $this->reflectionProvider->hasClass($referencedClasses[0])
) {
$staticMethodClassReflection = $this->reflectionProvider->getClass($referencedClasses[0]);
foreach ($this->getStaticMethodTypeSpecifyingExtensionsForClass($staticMethodClassReflection->getName()) as $extension) {
if (!$extension->isStaticMethodSupported($staticMethodReflection, $expr, $context)) {
continue;
}
return $extension->specifyTypes($staticMethodReflection, $expr, $scope, $context);
}
}
// lazy create parametersAcceptor, as creation can be expensive
$parametersAcceptor = null;
if (count($expr->getArgs()) > 0) {
$parametersAcceptor = ParametersAcceptorSelector::selectFromArgs($scope, $expr->getArgs(), $staticMethodReflection->getVariants(), $staticMethodReflection->getNamedArgumentsVariants());
$specifiedTypes = $this->specifyTypesFromConditionalReturnType($context, $expr, $parametersAcceptor, $scope);
if ($specifiedTypes !== null) {
return $specifiedTypes;
}
}
$assertions = $staticMethodReflection->getAsserts();
if ($assertions->getAll() !== []) {
$parametersAcceptor ??= ParametersAcceptorSelector::selectFromArgs($scope, $expr->getArgs(), $staticMethodReflection->getVariants(), $staticMethodReflection->getNamedArgumentsVariants());
$asserts = $assertions->mapTypes(static fn (Type $type) => TemplateTypeHelper::resolveTemplateTypes(
$type,
$parametersAcceptor->getResolvedTemplateTypeMap(),
$parametersAcceptor instanceof ParametersAcceptorWithPhpDocs ? $parametersAcceptor->getCallSiteVarianceMap() : TemplateTypeVarianceMap::createEmpty(),
TemplateTypeVariance::createInvariant(),
));
$specifiedTypes = $this->specifyTypesFromAsserts($context, $expr, $asserts, $parametersAcceptor, $scope);
if ($specifiedTypes !== null) {
return $specifiedTypes;
}
}
}
return $this->handleDefaultTruthyOrFalseyContext($context, $rootExpr, $expr, $scope);
} elseif ($expr instanceof BooleanAnd || $expr instanceof LogicalAnd) {
if (!$scope instanceof MutatingScope) {
throw new ShouldNotHappenException();
}
$leftTypes = $this->specifyTypesInCondition($scope, $expr->left, $context, $rootExpr);
$rightScope = $scope->filterByTruthyValue($expr->left);
$rightTypes = $this->specifyTypesInCondition($rightScope, $expr->right, $context, $rootExpr);
$types = $context->true() ? $leftTypes->unionWith($rightTypes) : $leftTypes->normalize($scope)->intersectWith($rightTypes->normalize($rightScope));
if ($context->false()) {
return new SpecifiedTypes(
$types->getSureTypes(),
$types->getSureNotTypes(),
false,
array_merge(
$this->processBooleanNotSureConditionalTypes($scope, $leftTypes, $rightTypes),
$this->processBooleanNotSureConditionalTypes($scope, $rightTypes, $leftTypes),
$this->processBooleanSureConditionalTypes($scope, $leftTypes, $rightTypes),
$this->processBooleanSureConditionalTypes($scope, $rightTypes, $leftTypes),
),
$rootExpr,
);
}
return $types;
} elseif ($expr instanceof BooleanOr || $expr instanceof LogicalOr) {
if (!$scope instanceof MutatingScope) {
throw new ShouldNotHappenException();
}
$leftTypes = $this->specifyTypesInCondition($scope, $expr->left, $context, $rootExpr);
$rightScope = $scope->filterByFalseyValue($expr->left);
$rightTypes = $this->specifyTypesInCondition($rightScope, $expr->right, $context, $rootExpr);
$types = $context->true() ? $leftTypes->normalize($scope)->intersectWith($rightTypes->normalize($rightScope)) : $leftTypes->unionWith($rightTypes);
if ($context->true()) {
return new SpecifiedTypes(
$types->getSureTypes(),
$types->getSureNotTypes(),
false,
array_merge(
$this->processBooleanNotSureConditionalTypes($scope, $leftTypes, $rightTypes),
$this->processBooleanNotSureConditionalTypes($scope, $rightTypes, $leftTypes),
$this->processBooleanSureConditionalTypes($scope, $leftTypes, $rightTypes),
$this->processBooleanSureConditionalTypes($scope, $rightTypes, $leftTypes),
),
$rootExpr,
);
}
return $types;
} elseif ($expr instanceof Node\Expr\BooleanNot && !$context->null()) {
return $this->specifyTypesInCondition($scope, $expr->expr, $context->negate(), $rootExpr);
} elseif ($expr instanceof Node\Expr\Assign) {
if (!$scope instanceof MutatingScope) {
throw new ShouldNotHappenException();
}
if ($context->null()) {
return $this->specifyTypesInCondition($scope->exitFirstLevelStatements(), $expr->expr, $context, $rootExpr);
}
return $this->specifyTypesInCondition($scope->exitFirstLevelStatements(), $expr->var, $context, $rootExpr);
} elseif (
$expr instanceof Expr\Isset_
&& count($expr->vars) > 0
&& !$context->null()
) {
// rewrite multi param isset() to and-chained single param isset()
if (count($expr->vars) > 1) {
$issets = [];
foreach ($expr->vars as $var) {
$issets[] = new Expr\Isset_([$var], $expr->getAttributes());
}
$first = array_shift($issets);
$andChain = null;
foreach ($issets as $isset) {
if ($andChain === null) {
$andChain = new BooleanAnd($first, $isset);
continue;
}
$andChain = new BooleanAnd($andChain, $isset);
}
if ($andChain === null) {
throw new ShouldNotHappenException();
}
return $this->specifyTypesInCondition($scope, $andChain, $context, $rootExpr);
}
$issetExpr = $expr->vars[0];
if (!$context->true()) {
if (!$scope instanceof MutatingScope) {
throw new ShouldNotHappenException();
}
$isset = $scope->issetCheck($issetExpr, static fn () => true);
if ($isset === false) {
return new SpecifiedTypes();
}
$type = $scope->getType($issetExpr);
$isNullable = !$type->isNull()->no();
$exprType = $this->create(
$issetExpr,
new NullType(),
$context->negate(),
false,
$scope,
$rootExpr,
);
if ($issetExpr instanceof Expr\Variable && is_string($issetExpr->name)) {
if ($isset === true) {
if ($isNullable) {
return $exprType;
}
// variable cannot exist in !isset()
return $exprType->unionWith($this->create(
new IssetExpr($issetExpr),
new NullType(),
$context,
false,
$scope,
$rootExpr,
));
}
if ($isNullable) {
// reduces variable certainty to maybe
return $exprType->unionWith($this->create(
new IssetExpr($issetExpr),
new NullType(),
$context->negate(),
false,
$scope,
$rootExpr,
));
}
// variable cannot exist in !isset()
return $this->create(
new IssetExpr($issetExpr),
new NullType(),
$context,
false,
$scope,
$rootExpr,
);
}
if ($isNullable && $isset === true) {
return $exprType;
}
return new SpecifiedTypes();
}
$tmpVars = [$issetExpr];
while (
$issetExpr instanceof ArrayDimFetch
|| $issetExpr instanceof PropertyFetch
|| (
$issetExpr instanceof StaticPropertyFetch
&& $issetExpr->class instanceof Expr
)
) {
if ($issetExpr instanceof StaticPropertyFetch) {
/** @var Expr $issetExpr */
$issetExpr = $issetExpr->class;
} else {
$issetExpr = $issetExpr->var;
}
$tmpVars[] = $issetExpr;
}
$vars = array_reverse($tmpVars);
$types = new SpecifiedTypes();
foreach ($vars as $var) {
if ($var instanceof Expr\Variable && is_string($var->name)) {
if ($scope->hasVariableType($var->name)->no()) {
return new SpecifiedTypes([], [], false, [], $rootExpr);
}
}
if (
$var instanceof ArrayDimFetch
&& $var->dim !== null
&& !$scope->getType($var->var) instanceof MixedType
) {
$dimType = $scope->getType($var->dim);
if ($dimType instanceof ConstantIntegerType || $dimType instanceof ConstantStringType) {
$types = $types->unionWith(
$this->create(
$var->var,
new HasOffsetType($dimType),
$context,
false,
$scope,
$rootExpr,
),
);
}
}
if (
$var instanceof PropertyFetch
&& $var->name instanceof Node\Identifier
) {
$types = $types->unionWith(
$this->create($var->var, new IntersectionType([
new ObjectWithoutClassType(),
new HasPropertyType($var->name->toString()),
]), TypeSpecifierContext::createTruthy(), false, $scope, $rootExpr),
);
} elseif (
$var instanceof StaticPropertyFetch
&& $var->class instanceof Expr
&& $var->name instanceof Node\VarLikeIdentifier
) {
$types = $types->unionWith(
$this->create($var->class, new IntersectionType([
new ObjectWithoutClassType(),
new HasPropertyType($var->name->toString()),
]), TypeSpecifierContext::createTruthy(), false, $scope, $rootExpr),
);
}
$types = $types->unionWith(
$this->create($var, new NullType(), TypeSpecifierContext::createFalse(), false, $scope, $rootExpr),
);
}
return $types;
} elseif (
$expr instanceof Expr\BinaryOp\Coalesce
&& !$context->null()
) {
if (!$context->true()) {
if (!$scope instanceof MutatingScope) {
throw new ShouldNotHappenException();
}
$isset = $scope->issetCheck($expr->left, static fn () => true);
if ($isset !== true) {
return new SpecifiedTypes();
}
return $this->create(
$expr->left,
new NullType(),
$context->negate(),
false,
$scope,
$rootExpr,
);
}
if ((new ConstantBooleanType(false))->isSuperTypeOf($scope->getType($expr->right)->toBoolean())->yes()) {
return $this->create(
$expr->left,
new NullType(),
TypeSpecifierContext::createFalse(),
false,
$scope,
$rootExpr,
);
}
} elseif (
$expr instanceof Expr\Empty_
) {
if (!$scope instanceof MutatingScope) {
throw new ShouldNotHappenException();
}
$isset = $scope->issetCheck($expr->expr, static fn () => true);
if ($isset === false) {
return new SpecifiedTypes();
}
return $this->specifyTypesInCondition($scope, new BooleanOr(
new Expr\BooleanNot(new Expr\Isset_([$expr->expr])),
new Expr\BooleanNot($expr->expr),
), $context, $rootExpr);
} elseif ($expr instanceof Expr\ErrorSuppress) {
return $this->specifyTypesInCondition($scope, $expr->expr, $context, $rootExpr);
} elseif (
$expr instanceof Expr\Ternary
&& !$context->null()
&& $scope->getType($expr->else)->isFalse()->yes()
) {
$conditionExpr = $expr->cond;
if ($expr->if !== null) {
$conditionExpr = new BooleanAnd($conditionExpr, $expr->if);
}
return $this->specifyTypesInCondition($scope, $conditionExpr, $context, $rootExpr);
} elseif ($expr instanceof Expr\NullsafePropertyFetch && !$context->null()) {
$types = $this->specifyTypesInCondition(
$scope,
new BooleanAnd(
new Expr\BinaryOp\NotIdentical($expr->var, new ConstFetch(new Name('null'))),
new PropertyFetch($expr->var, $expr->name),
),
$context,
$rootExpr,
);
$nullSafeTypes = $this->handleDefaultTruthyOrFalseyContext($context, $rootExpr, $expr, $scope);
return $context->true() ? $types->unionWith($nullSafeTypes) : $types->normalize($scope)->intersectWith($nullSafeTypes->normalize($scope));
} elseif ($expr instanceof Expr\NullsafeMethodCall && !$context->null()) {
$types = $this->specifyTypesInCondition(
$scope,
new BooleanAnd(
new Expr\BinaryOp\NotIdentical($expr->var, new ConstFetch(new Name('null'))),
new MethodCall($expr->var, $expr->name, $expr->args),
),
$context,
$rootExpr,
);
$nullSafeTypes = $this->handleDefaultTruthyOrFalseyContext($context, $rootExpr, $expr, $scope);
return $context->true() ? $types->unionWith($nullSafeTypes) : $types->normalize($scope)->intersectWith($nullSafeTypes->normalize($scope));
} elseif (
$expr instanceof Expr\New_
&& $expr->class instanceof Name
&& $this->reflectionProvider->hasClass($expr->class->toString())
) {
$classReflection = $this->reflectionProvider->getClass($expr->class->toString());
if ($classReflection->hasConstructor()) {
$methodReflection = $classReflection->getConstructor();
$asserts = $methodReflection->getAsserts();
if ($asserts->getAll() !== []) {
$parametersAcceptor = ParametersAcceptorSelector::selectFromArgs($scope, $expr->getArgs(), $methodReflection->getVariants(), $methodReflection->getNamedArgumentsVariants());
$asserts = $asserts->mapTypes(static fn (Type $type) => TemplateTypeHelper::resolveTemplateTypes(
$type,
$parametersAcceptor->getResolvedTemplateTypeMap(),
$parametersAcceptor instanceof ParametersAcceptorWithPhpDocs ? $parametersAcceptor->getCallSiteVarianceMap() : TemplateTypeVarianceMap::createEmpty(),
TemplateTypeVariance::createInvariant(),
));
$specifiedTypes = $this->specifyTypesFromAsserts($context, $expr, $asserts, $parametersAcceptor, $scope);
if ($specifiedTypes !== null) {
return $specifiedTypes;
}
}
}
} elseif (!$context->null()) {
return $this->handleDefaultTruthyOrFalseyContext($context, $rootExpr, $expr, $scope);
}
return new SpecifiedTypes([], [], false, [], $rootExpr);
}
private function specifyTypesForConstantBinaryExpression(
Expr $exprNode,
ConstantScalarType $constantType,
TypeSpecifierContext $context,
Scope $scope,
?Expr $rootExpr,
): ?SpecifiedTypes
{
if (!$context->null() && $constantType->getValue() === false) {
$types = $this->create($exprNode, $constantType, $context, false, $scope, $rootExpr);
if ($exprNode instanceof Expr\NullsafeMethodCall || $exprNode instanceof Expr\NullsafePropertyFetch) {
return $types;
}
return $types->unionWith($this->specifyTypesInCondition(
$scope,
$exprNode,
$context->true() ? TypeSpecifierContext::createFalse() : TypeSpecifierContext::createFalse()->negate(),
$rootExpr,
));
}
if (!$context->null() && $constantType->getValue() === true) {
$types = $this->create($exprNode, $constantType, $context, false, $scope, $rootExpr);
if ($exprNode instanceof Expr\NullsafeMethodCall || $exprNode instanceof Expr\NullsafePropertyFetch) {
return $types;
}
return $types->unionWith($this->specifyTypesInCondition(
$scope,
$exprNode,
$context->true() ? TypeSpecifierContext::createTrue() : TypeSpecifierContext::createTrue()->negate(),
$rootExpr,
));
}
if ($constantType->getValue() === null) {
return $this->create($exprNode, $constantType, $context, false, $scope, $rootExpr);
}
if (
!$context->null()
&& $exprNode instanceof FuncCall
&& count($exprNode->getArgs()) === 1
&& $exprNode->name instanceof Name
&& in_array(strtolower((string) $exprNode->name), ['count', 'sizeof'], true)
&& $constantType instanceof ConstantIntegerType
) {
if ($context->truthy() || $constantType->getValue() === 0) {
$newContext = $context;
if ($constantType->getValue() === 0) {
$newContext = $newContext->negate();
}
$argType = $scope->getType($exprNode->getArgs()[0]->value);
if ($argType->isArray()->yes()) {
$funcTypes = $this->create($exprNode, $constantType, $context, false, $scope, $rootExpr);
if ($argType->isList()->yes() && $context->truthy() && $constantType->getValue() < ConstantArrayTypeBuilder::ARRAY_COUNT_LIMIT) {
$valueTypesBuilder = ConstantArrayTypeBuilder::createEmpty();
$itemType = $argType->getIterableValueType();
for ($i = 0; $i < $constantType->getValue(); $i++) {
$valueTypesBuilder->setOffsetValueType(new ConstantIntegerType($i), $itemType);
}
$valueTypes = $this->create($exprNode->getArgs()[0]->value, $valueTypesBuilder->getArray(), $context, false, $scope, $rootExpr);
} else {
$valueTypes = $this->create($exprNode->getArgs()[0]->value, new NonEmptyArrayType(), $newContext, false, $scope, $rootExpr);
}
return $funcTypes->unionWith($valueTypes);
}
}
}
if (
!$context->null()
&& $exprNode instanceof FuncCall
&& count($exprNode->getArgs()) === 1
&& $exprNode->name instanceof Name
&& strtolower((string) $exprNode->name) === 'strlen'
&& $constantType instanceof ConstantIntegerType
) {
if ($context->truthy() || $constantType->getValue() === 0) {
$newContext = $context;
if ($constantType->getValue() === 0) {
$newContext = $newContext->negate();
}
$argType = $scope->getType($exprNode->getArgs()[0]->value);
if ($argType->isString()->yes()) {
$funcTypes = $this->create($exprNode, $constantType, $context, false, $scope, $rootExpr);
$accessory = new AccessoryNonEmptyStringType();
if ($constantType->getValue() >= 2) {
$accessory = new AccessoryNonFalsyStringType();
}
$valueTypes = $this->create($exprNode->getArgs()[0]->value, $accessory, $newContext, false, $scope, $rootExpr);
return $funcTypes->unionWith($valueTypes);
}
}