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psalm/src/Psalm/Internal/Analyzer/Statements/Expression/Assignment/PropertyAssignmentAnalyzer.php

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<?php
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namespace Psalm\Internal\Analyzer\Statements\Expression\Assignment;
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use PhpParser;
use PhpParser\Node\Expr\PropertyFetch;
use PhpParser\Node\Stmt\PropertyProperty;
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use Psalm\Internal\Analyzer\ClassLikeAnalyzer;
use Psalm\Internal\Analyzer\NamespaceAnalyzer;
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use Psalm\Internal\Analyzer\Statements\ExpressionAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Expression\ExpressionIdentifier;
use Psalm\Internal\Analyzer\Statements\Expression\Fetch\PropertyFetchAnalyzer;
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use Psalm\Internal\Analyzer\StatementsAnalyzer;
use Psalm\Internal\Analyzer\TypeAnalyzer;
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use Psalm\Internal\FileManipulation\FileManipulationBuffer;
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use Psalm\CodeLocation;
use Psalm\Context;
use Psalm\Issue\DeprecatedProperty;
use Psalm\Issue\ImplicitToStringCast;
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use Psalm\Issue\InaccessibleProperty;
use Psalm\Issue\InternalProperty;
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use Psalm\Issue\InvalidPropertyAssignment;
use Psalm\Issue\InvalidPropertyAssignmentValue;
use Psalm\Issue\LoopInvalidation;
use Psalm\Issue\MixedAssignment;
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use Psalm\Issue\MixedPropertyAssignment;
use Psalm\Issue\MixedPropertyTypeCoercion;
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use Psalm\Issue\NoInterfaceProperties;
use Psalm\Issue\NullPropertyAssignment;
use Psalm\Issue\PossiblyFalsePropertyAssignmentValue;
use Psalm\Issue\PossiblyInvalidPropertyAssignment;
use Psalm\Issue\PossiblyInvalidPropertyAssignmentValue;
use Psalm\Issue\PossiblyNullPropertyAssignment;
use Psalm\Issue\PossiblyNullPropertyAssignmentValue;
use Psalm\Issue\PropertyTypeCoercion;
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use Psalm\Issue\UndefinedClass;
use Psalm\Issue\UndefinedPropertyAssignment;
use Psalm\Issue\UndefinedMagicPropertyAssignment;
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use Psalm\Issue\UndefinedThisPropertyAssignment;
use Psalm\IssueBuffer;
use Psalm\Type;
use Psalm\Type\Atomic\TNamedObject;
use Psalm\Type\Atomic\TNull;
use Psalm\Type\Atomic\TObject;
use function count;
use function in_array;
use function strtolower;
use function explode;
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use Psalm\Internal\Taint\Sink;
use Psalm\Internal\Taint\Source;
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/**
* @internal
*/
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class PropertyAssignmentAnalyzer
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{
/**
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* @param StatementsAnalyzer $statements_analyzer
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* @param PropertyFetch|PropertyProperty $stmt
* @param string $prop_name
* @param PhpParser\Node\Expr|null $assignment_value
* @param Type\Union $assignment_value_type
* @param Context $context
* @param bool $direct_assignment whether the variable is assigned explicitly
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*
* @return false|null
*/
public static function analyzeInstance(
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StatementsAnalyzer $statements_analyzer,
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$stmt,
$prop_name,
$assignment_value,
Type\Union $assignment_value_type,
Context $context,
$direct_assignment = true
) {
$class_property_types = [];
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$codebase = $statements_analyzer->getCodebase();
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$property_exists = false;
$property_ids = [];
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if ($stmt instanceof PropertyProperty) {
if (!$context->self || !$stmt->default) {
return null;
}
$property_id = $context->self . '::$' . $prop_name;
$property_ids[] = $property_id;
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$property_exists = true;
$class_property_type = $codebase->properties->getPropertyType(
$property_id,
true,
$statements_analyzer,
$context
);
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if ($class_property_type) {
$class_storage = $codebase->classlike_storage_provider->get($context->self);
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$class_property_type = \Psalm\Internal\Type\TypeExpander::expandUnion(
$codebase,
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clone $class_property_type,
$class_storage->name,
$class_storage->name,
$class_storage->parent_class
);
}
$class_property_types[] = $class_property_type ?: Type::getMixed();
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$var_id = '$this->' . $prop_name;
} else {
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if (ExpressionAnalyzer::analyze($statements_analyzer, $stmt->var, $context) === false) {
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return false;
}
$lhs_type = $statements_analyzer->node_data->getType($stmt->var);
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if ($lhs_type === null) {
return null;
}
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$lhs_var_id = ExpressionIdentifier::getVarId(
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$stmt->var,
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$statements_analyzer->getFQCLN(),
$statements_analyzer
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);
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$var_id = ExpressionIdentifier::getVarId(
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$stmt,
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$statements_analyzer->getFQCLN(),
$statements_analyzer
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);
if ($var_id) {
$context->assigned_var_ids[$var_id] = true;
if ($direct_assignment && isset($context->protected_var_ids[$var_id])) {
if (IssueBuffer::accepts(
new LoopInvalidation(
'Variable ' . $var_id . ' has already been assigned in a for/foreach loop',
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new CodeLocation($statements_analyzer->getSource(), $stmt->var)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
// fall through
}
}
}
if ($lhs_type->hasMixed()) {
if (!$context->collect_initializations
&& !$context->collect_mutations
&& $statements_analyzer->getFilePath() === $statements_analyzer->getRootFilePath()
&& (!(($parent_source = $statements_analyzer->getSource())
instanceof \Psalm\Internal\Analyzer\FunctionLikeAnalyzer)
|| !$parent_source->getSource() instanceof \Psalm\Internal\Analyzer\TraitAnalyzer)
) {
$codebase->analyzer->incrementMixedCount($statements_analyzer->getFilePath());
}
if ($stmt->name instanceof PhpParser\Node\Identifier) {
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$codebase->analyzer->addMixedMemberName(
'$' . $stmt->name->name,
$context->calling_method_id ?: $statements_analyzer->getFileName()
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);
}
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if (IssueBuffer::accepts(
new MixedPropertyAssignment(
$lhs_var_id . ' of type mixed cannot be assigned to',
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new CodeLocation($statements_analyzer->getSource(), $stmt->var)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
return false;
}
return null;
}
if (!$context->collect_initializations
&& !$context->collect_mutations
&& $statements_analyzer->getFilePath() === $statements_analyzer->getRootFilePath()
&& (!(($parent_source = $statements_analyzer->getSource())
instanceof \Psalm\Internal\Analyzer\FunctionLikeAnalyzer)
|| !$parent_source->getSource() instanceof \Psalm\Internal\Analyzer\TraitAnalyzer)
) {
$codebase->analyzer->incrementNonMixedCount($statements_analyzer->getFilePath());
}
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if ($lhs_type->isNull()) {
if (IssueBuffer::accepts(
new NullPropertyAssignment(
$lhs_var_id . ' of type null cannot be assigned to',
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new CodeLocation($statements_analyzer->getSource(), $stmt->var)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
return false;
}
return null;
}
if ($lhs_type->isNullable() && !$lhs_type->ignore_nullable_issues) {
if (IssueBuffer::accepts(
new PossiblyNullPropertyAssignment(
$lhs_var_id . ' with possibly null type \'' . $lhs_type . '\' cannot be assigned to',
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new CodeLocation($statements_analyzer->getSource(), $stmt->var)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
return false;
}
}
$has_regular_setter = false;
$invalid_assignment_types = [];
$has_valid_assignment_type = false;
foreach ($lhs_type->getAtomicTypes() as $lhs_type_part) {
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if ($lhs_type_part instanceof TNull) {
continue;
}
if ($lhs_type_part instanceof Type\Atomic\TFalse
&& $lhs_type->ignore_falsable_issues
&& count($lhs_type->getAtomicTypes()) > 1
) {
continue;
}
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if (!$lhs_type_part instanceof TObject && !$lhs_type_part instanceof TNamedObject) {
$invalid_assignment_types[] = (string)$lhs_type_part;
continue;
}
$has_valid_assignment_type = true;
// stdClass and SimpleXMLElement are special cases where we cannot infer the return types
// but we don't want to throw an error
// Hack has a similar issue: https://github.com/facebook/hhvm/issues/5164
if ($lhs_type_part instanceof TObject ||
(
in_array(
strtolower($lhs_type_part->value),
['stdclass', 'simplexmlelement', 'dateinterval', 'domdocument', 'domnode'],
true
)
)
) {
if ($var_id) {
if ($lhs_type_part instanceof TNamedObject &&
strtolower($lhs_type_part->value) === 'stdclass'
) {
$context->vars_in_scope[$var_id] = $assignment_value_type;
} else {
$context->vars_in_scope[$var_id] = Type::getMixed();
}
}
return null;
}
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if (ExpressionAnalyzer::isMock($lhs_type_part->value)) {
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if ($var_id) {
$context->vars_in_scope[$var_id] = Type::getMixed();
}
return null;
}
$intersection_types = $lhs_type_part->getIntersectionTypes() ?: [];
$fq_class_name = $lhs_type_part->value;
$override_property_visibility = false;
$class_exists = false;
$interface_exists = false;
if (!$codebase->classExists($lhs_type_part->value)) {
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if ($codebase->interfaceExists($lhs_type_part->value)) {
$interface_exists = true;
$interface_storage = $codebase->classlike_storage_provider->get(
strtolower($lhs_type_part->value)
);
$override_property_visibility = $interface_storage->override_property_visibility;
foreach ($intersection_types as $intersection_type) {
if ($intersection_type instanceof TNamedObject
&& $codebase->classExists($intersection_type->value)
) {
$fq_class_name = $intersection_type->value;
$class_exists = true;
break;
}
}
if (!$class_exists) {
if (IssueBuffer::accepts(
new NoInterfaceProperties(
'Interfaces cannot have properties',
new CodeLocation($statements_analyzer->getSource(), $stmt),
$lhs_type_part->value
),
$statements_analyzer->getSuppressedIssues()
)) {
return null;
}
if (!$codebase->methods->methodExists(
new \Psalm\Internal\MethodIdentifier(
$fq_class_name,
'__set'
)
)) {
return null;
}
}
}
if (!$class_exists && !$interface_exists) {
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if (IssueBuffer::accepts(
new UndefinedClass(
'Cannot set properties of undefined class ' . $lhs_type_part->value,
new CodeLocation($statements_analyzer->getSource(), $stmt),
$lhs_type_part->value
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
// fall through
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}
return null;
}
} else {
$class_exists = true;
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}
$property_id = $fq_class_name . '::$' . $prop_name;
$property_ids[] = $property_id;
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$has_magic_setter = false;
$set_method_id = new \Psalm\Internal\MethodIdentifier($fq_class_name, '__set');
if ((!$codebase->properties->propertyExists($property_id, false, $statements_analyzer, $context)
|| ($lhs_var_id !== '$this'
&& $fq_class_name !== $context->self
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&& ClassLikeAnalyzer::checkPropertyVisibility(
$property_id,
$context,
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$statements_analyzer,
new CodeLocation($statements_analyzer->getSource(), $stmt),
$statements_analyzer->getSuppressedIssues(),
false
) !== true)
)
&& $codebase->methods->methodExists(
$set_method_id,
$context->calling_method_id,
$codebase->collect_locations
? new CodeLocation($statements_analyzer->getSource(), $stmt)
: null,
!$context->collect_initializations
&& !$context->collect_mutations
? $statements_analyzer
: null,
$statements_analyzer->getFilePath()
)
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) {
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$has_magic_setter = true;
$class_storage = $codebase->classlike_storage_provider->get($fq_class_name);
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if ($var_id) {
if (isset($class_storage->pseudo_property_set_types['$' . $prop_name])) {
$class_property_types[] =
clone $class_storage->pseudo_property_set_types['$' . $prop_name];
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$has_regular_setter = true;
$property_exists = true;
self::taintProperty($statements_analyzer, $stmt, $property_id, $assignment_value_type);
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continue;
}
}
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if ($assignment_value) {
if ($var_id) {
$context->removeVarFromConflictingClauses(
$var_id,
Type::getMixed(),
$statements_analyzer
);
unset($context->vars_in_scope[$var_id]);
}
$old_data_provider = $statements_analyzer->node_data;
$statements_analyzer->node_data = clone $statements_analyzer->node_data;
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$fake_method_call = new PhpParser\Node\Expr\MethodCall(
$stmt->var,
new PhpParser\Node\Identifier('__set', $stmt->name->getAttributes()),
[
new PhpParser\Node\Arg(
new PhpParser\Node\Scalar\String_(
$prop_name,
$stmt->name->getAttributes()
)
),
new PhpParser\Node\Arg(
$assignment_value
)
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]
);
$suppressed_issues = $statements_analyzer->getSuppressedIssues();
if (!in_array('PossiblyNullReference', $suppressed_issues, true)) {
$statements_analyzer->addSuppressedIssues(['PossiblyNullReference']);
}
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\Psalm\Internal\Analyzer\Statements\Expression\Call\MethodCallAnalyzer::analyze(
$statements_analyzer,
$fake_method_call,
$context,
false
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);
if (!in_array('PossiblyNullReference', $suppressed_issues, true)) {
$statements_analyzer->removeSuppressedIssues(['PossiblyNullReference']);
}
$statements_analyzer->node_data = $old_data_provider;
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}
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/*
* If we have an explicit list of all allowed magic properties on the class, and we're
* not in that list, fall through
*/
if (!$var_id || !$class_storage->sealed_properties) {
self::taintProperty($statements_analyzer, $stmt, $property_id, $assignment_value_type);
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continue;
}
if (!$class_exists) {
if (IssueBuffer::accepts(
new UndefinedMagicPropertyAssignment(
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'Magic instance property ' . $property_id . ' is not defined',
new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
}
}
if (!$class_exists) {
continue;
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}
$has_regular_setter = true;
if ($stmt->var instanceof PhpParser\Node\Expr\Variable
&& $stmt->var->name === 'this'
&& $context->self
) {
$self_property_id = $context->self . '::$' . $prop_name;
if ($self_property_id !== $property_id
&& $codebase->properties->propertyExists(
$self_property_id,
false,
$statements_analyzer,
$context
)
) {
$property_id = $self_property_id;
}
}
self::taintProperty($statements_analyzer, $stmt, $property_id, $assignment_value_type);
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if (!$codebase->properties->propertyExists(
$property_id,
false,
$statements_analyzer,
$context,
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new CodeLocation($statements_analyzer->getSource(), $stmt)
)) {
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if ($stmt->var instanceof PhpParser\Node\Expr\Variable && $stmt->var->name === 'this') {
// if this is a proper error, we'll see it on the first pass
if ($context->collect_mutations) {
continue;
}
if (IssueBuffer::accepts(
new UndefinedThisPropertyAssignment(
'Instance property ' . $property_id . ' is not defined',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
} else {
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if ($has_magic_setter) {
if (IssueBuffer::accepts(
new UndefinedMagicPropertyAssignment(
'Magic instance property ' . $property_id . ' is not defined',
new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
} else {
if (IssueBuffer::accepts(
new UndefinedPropertyAssignment(
'Instance property ' . $property_id . ' is not defined',
new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
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}
}
continue;
}
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if ($codebase->store_node_types
&& !$context->collect_initializations
&& !$context->collect_mutations
) {
$codebase->analyzer->addNodeReference(
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$statements_analyzer->getFilePath(),
$stmt->name,
$property_id
);
}
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$property_exists = true;
if (!$override_property_visibility) {
if (!$context->collect_mutations) {
if (ClassLikeAnalyzer::checkPropertyVisibility(
$property_id,
$context,
$statements_analyzer,
new CodeLocation($statements_analyzer->getSource(), $stmt),
$statements_analyzer->getSuppressedIssues()
) === false) {
return false;
}
} else {
if (ClassLikeAnalyzer::checkPropertyVisibility(
$property_id,
$context,
$statements_analyzer,
new CodeLocation($statements_analyzer->getSource(), $stmt),
$statements_analyzer->getSuppressedIssues(),
false
) !== true) {
continue;
}
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}
}
$declaring_property_class = (string) $codebase->properties->getDeclaringClassForProperty(
$property_id,
false
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);
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if ($codebase->properties_to_rename) {
$declaring_property_id = strtolower($declaring_property_class) . '::$' . $prop_name;
foreach ($codebase->properties_to_rename as $original_property_id => $new_property_name) {
if ($declaring_property_id === $original_property_id) {
$file_manipulations = [
new \Psalm\FileManipulation(
(int) $stmt->name->getAttribute('startFilePos'),
(int) $stmt->name->getAttribute('endFilePos') + 1,
$new_property_name
)
];
\Psalm\Internal\FileManipulation\FileManipulationBuffer::add(
$statements_analyzer->getFilePath(),
$file_manipulations
);
}
}
}
$declaring_class_storage = $codebase->classlike_storage_provider->get($declaring_property_class);
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$property_storage = null;
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if (isset($declaring_class_storage->properties[$prop_name])) {
$property_storage = $declaring_class_storage->properties[$prop_name];
if ($property_storage->deprecated) {
if (IssueBuffer::accepts(
new DeprecatedProperty(
$property_id . ' is marked deprecated',
new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
}
if ($property_storage->psalm_internal && $context->self) {
if (! NamespaceAnalyzer::isWithin($context->self, $property_storage->psalm_internal)) {
if (IssueBuffer::accepts(
new InternalProperty(
$property_id . ' is marked internal to ' . $property_storage->psalm_internal,
new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
}
}
if ($property_storage->internal && $context->self) {
if (! NamespaceAnalyzer::nameSpaceRootsMatch($context->self, $declaring_property_class)) {
if (IssueBuffer::accepts(
new InternalProperty(
$property_id . ' is marked internal',
new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
}
}
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// prevents writing to readonly properties
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if ($property_storage->readonly) {
$appearing_property_class = $codebase->properties->getAppearingClassForProperty(
$property_id,
true
);
$stmt_var_type = $statements_analyzer->node_data->getType($stmt->var);
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$property_var_pure_compatible = $stmt_var_type
&& $stmt_var_type->reference_free
&& $stmt_var_type->allow_mutations;
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if ($appearing_property_class) {
$can_set_property = $context->self
&& $context->calling_method_id
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&& ($appearing_property_class === $context->self
|| $codebase->classExtends($context->self, $appearing_property_class))
&& (\strpos($context->calling_method_id, '::__construct')
|| \strpos($context->calling_method_id, '::unserialize')
|| $property_storage->allow_private_mutation
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|| $property_var_pure_compatible);
if (!$can_set_property) {
if (IssueBuffer::accepts(
new InaccessibleProperty(
$property_id . ' is marked readonly',
new CodeLocation($statements_analyzer->getSource(), $stmt)
),
$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
} elseif ($declaring_class_storage->mutation_free) {
$visitor = new \Psalm\Internal\TypeVisitor\ImmutablePropertyAssignmentVisitor(
$statements_analyzer,
$stmt
);
$visitor->traverse($assignment_value_type);
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}
}
}
}
$class_property_type = $codebase->properties->getPropertyType(
$property_id,
true,
$statements_analyzer,
$context
);
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if (!$class_property_type) {
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$class_property_type = Type::getMixed();
if (!$assignment_value_type->hasMixed() && $property_storage) {
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if ($property_storage->suggested_type) {
$property_storage->suggested_type = Type::combineUnionTypes(
$assignment_value_type,
$property_storage->suggested_type
);
} else {
$property_storage->suggested_type =
$lhs_var_id === '$this' &&
($context->inside_constructor || $context->collect_initializations)
? $assignment_value_type
: Type::combineUnionTypes(Type::getNull(), $assignment_value_type);
}
}
} else {
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$class_property_type = \Psalm\Internal\Type\TypeExpander::expandUnion(
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$codebase,
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clone $class_property_type,
$fq_class_name,
$lhs_type_part,
$declaring_class_storage->parent_class
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);
$class_property_type = \Psalm\Internal\Codebase\Methods::localizeType(
$codebase,
$class_property_type,
$fq_class_name,
$declaring_property_class
);
if ($lhs_type_part instanceof Type\Atomic\TGenericObject) {
$class_storage = $codebase->classlike_storage_provider->get($fq_class_name);
$class_property_type = PropertyFetchAnalyzer::localizePropertyType(
$codebase,
$class_property_type,
$lhs_type_part,
$class_storage,
$declaring_class_storage
);
}
$assignment_value_type = \Psalm\Internal\Codebase\Methods::localizeType(
$codebase,
$assignment_value_type,
$fq_class_name,
$declaring_property_class
);
if (!$class_property_type->hasMixed() && $assignment_value_type->hasMixed()) {
if (IssueBuffer::accepts(
new MixedAssignment(
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'Cannot assign' . ($var_id ? ' ' . $var_id . ' ' : ' ') . 'to a mixed type',
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new CodeLocation($statements_analyzer->getSource(), $stmt)
),
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$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
}
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}
$class_property_types[] = $class_property_type;
}
if ($invalid_assignment_types) {
$invalid_assignment_type = $invalid_assignment_types[0];
if (!$has_valid_assignment_type) {
if (IssueBuffer::accepts(
new InvalidPropertyAssignment(
$lhs_var_id . ' with non-object type \'' . $invalid_assignment_type .
'\' cannot treated as an object',
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new CodeLocation($statements_analyzer->getSource(), $stmt->var)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
return false;
}
} else {
if (IssueBuffer::accepts(
new PossiblyInvalidPropertyAssignment(
$lhs_var_id . ' with possible non-object type \'' . $invalid_assignment_type .
'\' cannot treated as an object',
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new CodeLocation($statements_analyzer->getSource(), $stmt->var)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
return false;
}
}
}
if (!$has_regular_setter) {
return null;
}
if ($var_id) {
if ($context->collect_initializations
&& $lhs_var_id === '$this'
) {
$assignment_value_type->initialized_class = $context->self;
}
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// because we don't want to be assigning for property declarations
$context->vars_in_scope[$var_id] = $assignment_value_type;
}
}
if (!$property_exists) {
return null;
}
if ($assignment_value_type->hasMixed()) {
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return null;
}
$invalid_assignment_value_types = [];
$has_valid_assignment_value_type = false;
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if ($codebase->store_node_types
&& !$context->collect_initializations
&& !$context->collect_mutations
&& count($class_property_types) === 1
) {
$codebase->analyzer->addNodeType(
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$statements_analyzer->getFilePath(),
$stmt->name,
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$class_property_types[0]->getId()
);
}
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foreach ($class_property_types as $class_property_type) {
if ($class_property_type->hasMixed()) {
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continue;
}
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$union_comparison_results = new \Psalm\Internal\Analyzer\TypeComparisonResult();
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$type_match_found = TypeAnalyzer::isContainedBy(
$codebase,
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$assignment_value_type,
$class_property_type,
true,
true,
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$union_comparison_results
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);
if ($type_match_found && $union_comparison_results->replacement_union_type) {
if ($var_id) {
$context->vars_in_scope[$var_id] = $union_comparison_results->replacement_union_type;
}
}
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if ($union_comparison_results->type_coerced) {
if ($union_comparison_results->type_coerced_from_mixed) {
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if (IssueBuffer::accepts(
new MixedPropertyTypeCoercion(
$var_id . ' expects \'' . $class_property_type->getId() . '\', '
. ' parent type `' . $assignment_value_type->getId() . '` provided',
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new CodeLocation(
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$statements_analyzer->getSource(),
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$assignment_value ?: $stmt,
$context->include_location
),
$property_ids[0]
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
// keep soldiering on
}
} else {
if (IssueBuffer::accepts(
new PropertyTypeCoercion(
$var_id . ' expects \'' . $class_property_type->getId() . '\', '
. ' parent type \'' . $assignment_value_type->getId() . '\' provided',
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new CodeLocation(
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$statements_analyzer->getSource(),
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$assignment_value ?: $stmt,
$context->include_location
),
$property_ids[0]
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
// keep soldiering on
}
}
}
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if ($union_comparison_results->to_string_cast) {
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if (IssueBuffer::accepts(
new ImplicitToStringCast(
$var_id . ' expects \'' . $class_property_type . '\', '
. '\'' . $assignment_value_type . '\' provided with a __toString method',
new CodeLocation(
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$statements_analyzer->getSource(),
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$assignment_value ?: $stmt,
$context->include_location
)
),
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$statements_analyzer->getSuppressedIssues()
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)) {
// fall through
}
}
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if (!$type_match_found && !$union_comparison_results->type_coerced) {
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if (TypeAnalyzer::canBeContainedBy(
$codebase,
$assignment_value_type,
$class_property_type,
true,
true
)) {
$has_valid_assignment_value_type = true;
}
$invalid_assignment_value_types[] = $class_property_type->getId();
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} else {
$has_valid_assignment_value_type = true;
}
if ($type_match_found) {
if (!$assignment_value_type->ignore_nullable_issues
&& $assignment_value_type->isNullable()
&& !$class_property_type->isNullable()
) {
if (IssueBuffer::accepts(
new PossiblyNullPropertyAssignmentValue(
$var_id . ' with non-nullable declared type \'' . $class_property_type .
'\' cannot be assigned nullable type \'' . $assignment_value_type . '\'',
new CodeLocation(
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$statements_analyzer->getSource(),
$assignment_value ?: $stmt,
$context->include_location
),
$property_ids[0]
),
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$statements_analyzer->getSuppressedIssues()
)) {
return false;
}
}
if (!$assignment_value_type->ignore_falsable_issues
&& $assignment_value_type->isFalsable()
&& !$class_property_type->hasBool()
&& !$class_property_type->hasScalar()
) {
if (IssueBuffer::accepts(
new PossiblyFalsePropertyAssignmentValue(
$var_id . ' with non-falsable declared type \'' . $class_property_type .
'\' cannot be assigned possibly false type \'' . $assignment_value_type . '\'',
new CodeLocation(
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$statements_analyzer->getSource(),
$assignment_value ?: $stmt,
$context->include_location
),
$property_ids[0]
),
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$statements_analyzer->getSuppressedIssues()
)) {
return false;
}
}
}
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}
if ($invalid_assignment_value_types) {
$invalid_class_property_type = $invalid_assignment_value_types[0];
if (!$has_valid_assignment_value_type) {
if (IssueBuffer::accepts(
new InvalidPropertyAssignmentValue(
$var_id . ' with declared type \'' . $invalid_class_property_type .
'\' cannot be assigned type \'' . $assignment_value_type->getId() . '\'',
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new CodeLocation(
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$statements_analyzer->getSource(),
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$assignment_value ?: $stmt,
$context->include_location
),
$property_ids[0]
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
return false;
}
} else {
if (IssueBuffer::accepts(
new PossiblyInvalidPropertyAssignmentValue(
$var_id . ' with declared type \'' . $invalid_class_property_type .
'\' cannot be assigned possibly different type \'' .
$assignment_value_type->getId() . '\'',
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new CodeLocation(
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$statements_analyzer->getSource(),
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$assignment_value ?: $stmt,
$context->include_location
),
$property_ids[0]
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
return false;
}
}
}
return null;
}
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public static function analyzeStatement(
StatementsAnalyzer $statements_analyzer,
PhpParser\Node\Stmt\Property $stmt,
Context $context
): void {
foreach ($stmt->props as $prop) {
if ($prop->default) {
ExpressionAnalyzer::analyze($statements_analyzer, $prop->default, $context);
if ($prop_default_type = $statements_analyzer->node_data->getType($prop->default)) {
if (self::analyzeInstance(
$statements_analyzer,
$prop,
$prop->name->name,
$prop->default,
$prop_default_type,
$context
) === false) {
// fall through
}
}
}
}
}
private static function taintProperty(
StatementsAnalyzer $statements_analyzer,
PhpParser\Node\Expr\PropertyFetch $stmt,
string $property_id,
Type\Union $assignment_value_type
) : void {
$codebase = $statements_analyzer->getCodebase();
if (!$codebase->taint) {
return;
}
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$code_location = new CodeLocation($statements_analyzer->getSource(), $stmt);
$method_sink = new Sink(
$property_id,
$property_id,
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$code_location
);
if ($assignment_value_type->tainted) {
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$method_sink->taint = $assignment_value_type->tainted;
}
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if ($child_sink = $codebase->taint->hasPreviousSink($method_sink)) {
if ($assignment_value_type->sources) {
$codebase->taint->addSinks(
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\array_map(
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function (Source $assignment_source) use ($child_sink) {
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$new_sink = new Sink(
$assignment_source->id,
$assignment_source->label,
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$assignment_source->code_location
);
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$new_sink->children = [$child_sink];
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return $new_sink;
},
$assignment_value_type->sources
)
);
}
}
if ($assignment_value_type->sources) {
foreach ($assignment_value_type->sources as $type_source) {
if (($previous_source = $codebase->taint->hasPreviousSource($type_source))
|| $assignment_value_type->tainted
) {
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if (!$previous_source) {
$previous_source = new Source(
$type_source->id,
$type_source->label,
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$type_source->code_location
);
$previous_source->taint = $assignment_value_type->tainted;
}
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$new_source = new Source(
$property_id,
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$property_id,
$code_location
);
$new_source->parents = [$previous_source];
$new_source->taint = $previous_source->taint;
$codebase->taint->addSources(
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[$new_source]
);
}
}
} elseif ($assignment_value_type->tainted) {
throw new \UnexpectedValueException(
'sources should exist for tainted var in '
. $statements_analyzer->getFileName() . ':'
. $stmt->getLine()
);
}
}
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/**
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* @param StatementsAnalyzer $statements_analyzer
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* @param PhpParser\Node\Expr\StaticPropertyFetch $stmt
* @param PhpParser\Node\Expr|null $assignment_value
* @param Type\Union $assignment_value_type
* @param Context $context
*
* @return false|null
*/
public static function analyzeStatic(
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StatementsAnalyzer $statements_analyzer,
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PhpParser\Node\Expr\StaticPropertyFetch $stmt,
$assignment_value,
Type\Union $assignment_value_type,
Context $context
) {
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$var_id = ExpressionIdentifier::getArrayVarId(
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$stmt,
$context->self,
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$statements_analyzer
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);
$fq_class_name = (string) $statements_analyzer->node_data->getType($stmt->class);
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$codebase = $statements_analyzer->getCodebase();
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$prop_name = $stmt->name;
if (!$prop_name instanceof PhpParser\Node\Identifier) {
if (ExpressionAnalyzer::analyze($statements_analyzer, $prop_name, $context) === false) {
return false;
}
if ($fq_class_name && !$context->ignore_variable_property) {
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$codebase->analyzer->addMixedMemberName(
strtolower($fq_class_name) . '::$',
$context->calling_method_id ?: $statements_analyzer->getFileName()
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);
}
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return;
}
$property_id = $fq_class_name . '::$' . $prop_name;
if (!$codebase->properties->propertyExists($property_id, false, $statements_analyzer, $context)) {
if (IssueBuffer::accepts(
new UndefinedPropertyAssignment(
'Static property ' . $property_id . ' is not defined',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)) {
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// fall through
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}
return;
}
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if (ClassLikeAnalyzer::checkPropertyVisibility(
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$property_id,
$context,
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$statements_analyzer,
new CodeLocation($statements_analyzer->getSource(), $stmt),
$statements_analyzer->getSuppressedIssues()
2018-01-14 18:09:40 +01:00
) === false) {
return false;
}
$declaring_property_class = (string) $codebase->properties->getDeclaringClassForProperty(
$fq_class_name . '::$' . $prop_name->name,
false
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);
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$declaring_property_id = strtolower((string) $declaring_property_class) . '::$' . $prop_name;
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if ($codebase->alter_code && $stmt->class instanceof PhpParser\Node\Name) {
$moved_class = $codebase->classlikes->handleClassLikeReferenceInMigration(
$codebase,
$statements_analyzer,
$stmt->class,
$fq_class_name,
$context->calling_method_id
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);
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if (!$moved_class) {
foreach ($codebase->property_transforms as $original_pattern => $transformation) {
if ($declaring_property_id === $original_pattern) {
list($old_declaring_fq_class_name) = explode('::$', $declaring_property_id);
list($new_fq_class_name, $new_property_name) = explode('::$', $transformation);
$file_manipulations = [];
if (strtolower($new_fq_class_name) !== strtolower($old_declaring_fq_class_name)) {
$file_manipulations[] = new \Psalm\FileManipulation(
(int) $stmt->class->getAttribute('startFilePos'),
(int) $stmt->class->getAttribute('endFilePos') + 1,
Type::getStringFromFQCLN(
$new_fq_class_name,
$statements_analyzer->getNamespace(),
$statements_analyzer->getAliasedClassesFlipped(),
null
)
);
}
$file_manipulations[] = new \Psalm\FileManipulation(
(int) $stmt->name->getAttribute('startFilePos'),
(int) $stmt->name->getAttribute('endFilePos') + 1,
'$' . $new_property_name
);
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FileManipulationBuffer::add($statements_analyzer->getFilePath(), $file_manipulations);
}
}
2019-06-04 06:32:19 +02:00
}
}
$class_storage = $codebase->classlike_storage_provider->get($declaring_property_class);
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$property_storage = $class_storage->properties[$prop_name->name];
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if ($var_id) {
$context->vars_in_scope[$var_id] = $assignment_value_type;
}
$class_property_type = $codebase->properties->getPropertyType(
$property_id,
true,
$statements_analyzer,
$context
);
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if (!$class_property_type) {
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$class_property_type = Type::getMixed();
if (!$assignment_value_type->hasMixed()) {
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if ($property_storage->suggested_type) {
$property_storage->suggested_type = Type::combineUnionTypes(
$assignment_value_type,
$property_storage->suggested_type
);
} else {
$property_storage->suggested_type = Type::combineUnionTypes(
Type::getNull(),
$assignment_value_type
);
}
}
} else {
$class_property_type = clone $class_property_type;
}
if ($assignment_value_type->hasMixed()) {
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return null;
}
if ($class_property_type->hasMixed()) {
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return null;
}
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$class_property_type = \Psalm\Internal\Type\TypeExpander::expandUnion(
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$codebase,
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$class_property_type,
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$fq_class_name,
$fq_class_name,
$class_storage->parent_class
2018-01-14 18:09:40 +01:00
);
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$union_comparison_results = new \Psalm\Internal\Analyzer\TypeComparisonResult();
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$type_match_found = TypeAnalyzer::isContainedBy(
$codebase,
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$assignment_value_type,
$class_property_type,
true,
true,
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$union_comparison_results
);
2019-07-10 07:35:57 +02:00
if ($union_comparison_results->type_coerced) {
if ($union_comparison_results->type_coerced_from_mixed) {
if (IssueBuffer::accepts(
new MixedPropertyTypeCoercion(
2020-03-25 14:18:49 +01:00
$var_id . ' expects \'' . $class_property_type->getId() . '\', '
. ' parent type `' . $assignment_value_type->getId() . '` provided',
new CodeLocation(
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$statements_analyzer->getSource(),
$assignment_value ?: $stmt,
$context->include_location
),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)) {
// keep soldiering on
}
} else {
if (IssueBuffer::accepts(
new PropertyTypeCoercion(
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$var_id . ' expects \'' . $class_property_type->getId() . '\', '
. ' parent type \'' . $assignment_value_type->getId() . '\' provided',
new CodeLocation(
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$statements_analyzer->getSource(),
$assignment_value ?: $stmt,
$context->include_location
),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)) {
// keep soldiering on
}
}
}
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if ($union_comparison_results->to_string_cast) {
if (IssueBuffer::accepts(
new ImplicitToStringCast(
$var_id . ' expects \'' . $class_property_type . '\', '
. '\'' . $assignment_value_type . '\' provided with a __toString method',
new CodeLocation(
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$statements_analyzer->getSource(),
$assignment_value ?: $stmt,
$context->include_location
)
),
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$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
}
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if (!$type_match_found && !$union_comparison_results->type_coerced) {
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if (TypeAnalyzer::canBeContainedBy($codebase, $assignment_value_type, $class_property_type)) {
if (IssueBuffer::accepts(
new PossiblyInvalidPropertyAssignmentValue(
$var_id . ' with declared type \''
. $class_property_type->getId() . '\' cannot be assigned type \''
. $assignment_value_type->getId() . '\'',
new CodeLocation(
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$statements_analyzer->getSource(),
$assignment_value ?: $stmt
),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)) {
return false;
}
} else {
if (IssueBuffer::accepts(
new InvalidPropertyAssignmentValue(
$var_id . ' with declared type \'' . $class_property_type->getId()
. '\' cannot be assigned type \''
. $assignment_value_type->getId() . '\'',
new CodeLocation(
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$statements_analyzer->getSource(),
$assignment_value ?: $stmt
),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)) {
return false;
}
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}
}
if ($var_id) {
$context->vars_in_scope[$var_id] = $assignment_value_type;
}
return null;
}
}