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FunctionLikeAnalyzer.php
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FunctionLikeAnalyzer.php
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<?php
namespace Psalm\Internal\Analyzer;
use PhpParser;
use PhpParser\Node\Expr\ArrowFunction;
use PhpParser\Node\Expr\Closure;
use PhpParser\Node\Stmt\ClassMethod;
use PhpParser\Node\Stmt\Function_;
use Psalm\CodeLocation;
use Psalm\Codebase;
use Psalm\Context;
use Psalm\Internal\Analyzer\FunctionLike\ReturnTypeAnalyzer;
use Psalm\Internal\Analyzer\FunctionLike\ReturnTypeCollector;
use Psalm\Internal\Analyzer\Statements\ExpressionAnalyzer;
use Psalm\Internal\DataFlow\DataFlowNode;
use Psalm\Internal\FileManipulation\FunctionDocblockManipulator;
use Psalm\Internal\Type\Comparator\TypeComparisonResult;
use Psalm\Internal\Type\Comparator\UnionTypeComparator;
use Psalm\Issue\InvalidDocblockParamName;
use Psalm\Issue\InvalidParamDefault;
use Psalm\Issue\MethodSignatureMismatch;
use Psalm\Issue\MismatchingDocblockParamType;
use Psalm\Issue\MissingClosureParamType;
use Psalm\Issue\MissingParamType;
use Psalm\Issue\MissingThrowsDocblock;
use Psalm\Issue\ReferenceConstraintViolation;
use Psalm\Issue\ReservedWord;
use Psalm\Issue\UnusedClosureParam;
use Psalm\Issue\UnusedParam;
use Psalm\IssueBuffer;
use Psalm\Plugin\EventHandler\Event\AfterFunctionLikeAnalysisEvent;
use Psalm\Storage\FunctionLikeStorage;
use Psalm\Storage\FunctionStorage;
use Psalm\Storage\MethodStorage;
use Psalm\Type;
use Psalm\Type\Atomic\TNamedObject;
use function array_key_exists;
use function array_keys;
use function array_merge;
use function array_search;
use function end;
use function md5;
use function strpos;
use function strtolower;
use function substr;
/**
* @internal
* @template-covariant TFunction as Closure|Function_|ClassMethod|ArrowFunction
*/
abstract class FunctionLikeAnalyzer extends SourceAnalyzer
{
/**
* @var TFunction
*/
protected $function;
/**
* @var Codebase
*/
protected $codebase;
/**
* @var array<string>
*/
protected $suppressed_issues;
/**
* @var bool
*/
protected $is_static = false;
/**
* @var ?array<string, Type\Union>
*/
protected $return_vars_in_scope = [];
/**
* @var ?array<string, bool>
*/
protected $return_vars_possibly_in_scope = [];
/**
* @var Type\Union|null
*/
private $local_return_type;
/**
* @var array<string, bool>
*/
protected static $no_effects_hashes = [];
/**
* @var bool
*/
public $track_mutations = false;
/**
* @var bool
*/
public $inferred_impure = false;
/**
* @var bool
*/
public $inferred_has_mutation = false;
/**
* Holds param nodes for functions with func_get_args calls
*
* @var array<string, DataFlowNode>
*/
public $param_nodes = [];
/**
* @var FunctionLikeStorage
*/
protected $storage;
/**
* @param TFunction $function
*/
public function __construct($function, SourceAnalyzer $source, FunctionLikeStorage $storage)
{
$this->function = $function;
$this->source = $source;
$this->suppressed_issues = $source->getSuppressedIssues();
$this->codebase = $source->getCodebase();
$this->storage = $storage;
}
/**
* @param bool $add_mutations whether or not to add mutations to this method
*
* @return false|null
*
* @psalm-suppress PossiblyUnusedReturnValue unused but seems important
*/
public function analyze(
Context $context,
\Psalm\Internal\Provider\NodeDataProvider $type_provider,
?Context $global_context = null,
bool $add_mutations = false
): ?bool {
$storage = $this->storage;
$function_stmts = $this->function->getStmts() ?: [];
if ($this->function instanceof ArrowFunction
&& isset($function_stmts[0])
&& $function_stmts[0] instanceof PhpParser\Node\Stmt\Return_
&& $function_stmts[0]->expr
) {
$function_stmts[0]->setAttributes($function_stmts[0]->expr->getAttributes());
}
if ($global_context) {
foreach ($global_context->constants as $const_name => $var_type) {
if (!$context->hasVariable($const_name)) {
$context->vars_in_scope[$const_name] = clone $var_type;
}
}
}
$codebase = $this->codebase;
$project_analyzer = $this->getProjectAnalyzer();
if ($codebase->track_unused_suppressions && !isset($storage->suppressed_issues[0])) {
foreach ($storage->suppressed_issues as $offset => $issue_name) {
IssueBuffer::addUnusedSuppression($this->getFilePath(), $offset, $issue_name);
}
}
foreach ($storage->docblock_issues as $docblock_issue) {
IssueBuffer::add($docblock_issue);
}
$function_information = $this->getFunctionInformation(
$context,
$codebase,
$type_provider,
$storage,
$add_mutations
);
if ($function_information === null) {
return null;
}
[
$real_method_id,
$method_id,
$appearing_class_storage,
$hash,
$cased_method_id,
$overridden_method_ids
] = $function_information;
$this->suppressed_issues = $this->getSource()->getSuppressedIssues() + $storage->suppressed_issues;
if ($appearing_class_storage) {
$this->suppressed_issues += $appearing_class_storage->suppressed_issues;
}
if ($storage instanceof MethodStorage && $storage->is_static) {
$this->is_static = true;
}
$statements_analyzer = new StatementsAnalyzer($this, $type_provider);
if ($this instanceof ClosureAnalyzer && $this->function instanceof Closure) {
$byref_uses = [];
foreach ($this->function->uses as $use) {
if (!\is_string($use->var->name)) {
continue;
}
$use_var_id = '$' . $use->var->name;
$use_location = new CodeLocation($this, $use);
$use_assignment = null;
if ($statements_analyzer->data_flow_graph) {
$use_assignment = DataFlowNode::getForAssignment(
$use_var_id,
$use_location
);
$statements_analyzer->data_flow_graph->addNode($use_assignment);
$context->vars_in_scope[$use_var_id]->parent_nodes += [$use_assignment->id => $use_assignment];
}
if ($use->byRef) {
$byref_uses[$use_var_id] = true;
if ($statements_analyzer->data_flow_graph && $use_assignment) {
$statements_analyzer->data_flow_graph->addPath(
$use_assignment,
new DataFlowNode('closure-use', 'closure use', null),
'closure-use'
);
}
} else {
$statements_analyzer->registerVariable($use_var_id, $use_location, null);
}
}
$statements_analyzer->setByRefUses($byref_uses);
}
if ($storage->template_types) {
foreach ($storage->template_types as $param_name => $_) {
$fq_classlike_name = Type::getFQCLNFromString(
$param_name,
$this->getAliases()
);
if ($codebase->classOrInterfaceExists($fq_classlike_name)) {
if (IssueBuffer::accepts(
new ReservedWord(
'Cannot use ' . $param_name . ' as template name since the class already exists',
new CodeLocation($this, $this->function),
'resource'
),
$this->getSuppressedIssues()
)) {
// fall through
}
}
}
}
$template_types = $storage->template_types;
if ($appearing_class_storage && $appearing_class_storage->template_types) {
$template_types = array_merge($template_types ?: [], $appearing_class_storage->template_types);
}
$params = $storage->params;
if ($codebase->alter_code) {
$this->alterParams($codebase, $storage, $params, $context);
}
foreach ($codebase->methods_to_rename as $original_method_id => $new_method_name) {
if ($this instanceof MethodAnalyzer
&& strtolower((string) $this->getMethodId()) === $original_method_id
) {
$file_manipulations = [
new \Psalm\FileManipulation(
(int) $this->function->name->getAttribute('startFilePos'),
(int) $this->function->name->getAttribute('endFilePos') + 1,
$new_method_name
)
];
\Psalm\Internal\FileManipulation\FileManipulationBuffer::add(
$this->getFilePath(),
$file_manipulations
);
}
}
if ($storage instanceof MethodStorage
&& $method_id instanceof \Psalm\Internal\MethodIdentifier
&& $overridden_method_ids
) {
$params = $codebase->methods->getMethodParams(
$method_id,
$this
);
}
$check_stmts = $this->processParams(
$statements_analyzer,
$storage,
$cased_method_id,
$params,
$context,
(bool) $template_types
);
if ($storage->pure) {
$context->pure = true;
}
if ($storage->mutation_free
&& $cased_method_id
&& !strpos($cased_method_id, '__construct')
&& !($storage instanceof MethodStorage && $storage->mutation_free_inferred)
) {
$context->mutation_free = true;
}
if ($storage instanceof MethodStorage
&& $storage->external_mutation_free
&& !$storage->mutation_free_inferred
) {
$context->external_mutation_free = true;
}
if ($storage->unused_docblock_params) {
foreach ($storage->unused_docblock_params as $param_name => $param_location) {
if (IssueBuffer::accepts(
new InvalidDocblockParamName(
'Incorrect param name $' . $param_name . ' in docblock for ' . $cased_method_id,
$param_location
)
)) {
}
}
}
if ($storage->signature_return_type && $storage->signature_return_type_location) {
[$start, $end] = $storage->signature_return_type_location->getSelectionBounds();
$codebase->analyzer->addOffsetReference(
$this->getFilePath(),
$start,
$end,
(string) $storage->signature_return_type
);
}
if ($storage instanceof MethodStorage && $storage->location && !$storage->allow_named_arg_calls) {
foreach ($overridden_method_ids as $overridden_method_id) {
$overridden_storage = $codebase->methods->getStorage($overridden_method_id);
if ($overridden_storage->allow_named_arg_calls) {
IssueBuffer::accepts(new MethodSignatureMismatch(
'Method ' . (string) $method_id . ' should accept named arguments '
. ' as ' . (string) $overridden_method_id . ' does',
$storage->location
));
}
}
}
if (ReturnTypeAnalyzer::checkReturnType(
$this->function,
$project_analyzer,
$this,
$storage,
$context
) === false) {
$check_stmts = false;
}
if (!$check_stmts) {
return false;
}
if ($context->collect_initializations || $context->collect_mutations) {
$statements_analyzer->addSuppressedIssues([
'DocblockTypeContradiction',
'InvalidReturnStatement',
'RedundantCondition',
'RedundantConditionGivenDocblockType',
'TypeDoesNotContainNull',
'TypeDoesNotContainType',
'LoopInvalidation',
]);
if ($context->collect_initializations) {
$statements_analyzer->addSuppressedIssues([
'UndefinedInterfaceMethod',
'UndefinedMethod',
'PossiblyUndefinedMethod',
]);
}
} elseif ($cased_method_id && strpos($cased_method_id, '__destruct')) {
$statements_analyzer->addSuppressedIssues([
'InvalidPropertyAssignmentValue',
'PossiblyNullPropertyAssignmentValue',
]);
}
$time = \microtime(true);
$project_analyzer = $statements_analyzer->getProjectAnalyzer();
if ($codebase->alter_code
&& (isset($project_analyzer->getIssuesToFix()['MissingPureAnnotation'])
|| isset($project_analyzer->getIssuesToFix()['MissingImmutableAnnotation']))
) {
$this->track_mutations = true;
} elseif ($this->function instanceof Closure
|| $this->function instanceof ArrowFunction
) {
$this->track_mutations = true;
}
$statements_analyzer->analyze($function_stmts, $context, $global_context, true);
if ($codebase->alter_code
&& isset($project_analyzer->getIssuesToFix()['MissingPureAnnotation'])
&& !$this->inferred_impure
&& ($this->function instanceof Function_
|| $this->function instanceof ClassMethod)
&& $storage->params
&& !$overridden_method_ids
) {
$manipulator = FunctionDocblockManipulator::getForFunction(
$project_analyzer,
$this->source->getFilePath(),
$this->function
);
$yield_types = [];
$inferred_return_types = ReturnTypeCollector::getReturnTypes(
$codebase,
$type_provider,
$function_stmts,
$yield_types,
true
);
$inferred_return_type = $inferred_return_types
? \Psalm\Type::combineUnionTypeArray(
$inferred_return_types,
$codebase
)
: Type::getVoid();
if (!$inferred_return_type->isVoid()
&& !$inferred_return_type->isFalse()
&& !$inferred_return_type->isNull()
&& !$inferred_return_type->isSingleIntLiteral()
&& !$inferred_return_type->isSingleStringLiteral()
&& !$inferred_return_type->isTrue()
&& $inferred_return_type->getId() !== 'array<empty, empty>'
) {
$manipulator->makePure();
}
}
if ($this->inferred_has_mutation && $context->self) {
$this->codebase->analyzer->addMutableClass($context->self);
}
if (!$context->collect_initializations
&& !$context->collect_mutations
&& $project_analyzer->debug_performance
&& $cased_method_id
) {
$traverser = new PhpParser\NodeTraverser;
$node_counter = new \Psalm\Internal\PhpVisitor\NodeCounterVisitor();
$traverser->addVisitor($node_counter);
$traverser->traverse($function_stmts);
if ($node_counter->count > 5) {
$time_taken = \microtime(true) - $time;
$codebase->analyzer->addFunctionTiming($cased_method_id, $time_taken / $node_counter->count);
}
}
$final_actions = ScopeAnalyzer::getControlActions(
$this->function->getStmts() ?: [],
null,
[]
);
if ($final_actions !== [ScopeAnalyzer::ACTION_END]) {
$this->examineParamTypes($statements_analyzer, $context, $codebase);
}
foreach ($params as $function_param) {
// only complain if there's no type defined by a parent type
if (!$function_param->type
&& $function_param->location
) {
if ($this->function instanceof Closure
|| $this->function instanceof ArrowFunction
) {
IssueBuffer::accepts(
new MissingClosureParamType(
'Parameter $' . $function_param->name . ' has no provided type',
$function_param->location
),
$storage->suppressed_issues + $this->getSuppressedIssues()
);
} else {
IssueBuffer::accepts(
new MissingParamType(
'Parameter $' . $function_param->name . ' has no provided type',
$function_param->location
),
$storage->suppressed_issues + $this->getSuppressedIssues()
);
}
}
}
if ($this->function instanceof Closure
|| $this->function instanceof ArrowFunction
) {
$this->verifyReturnType(
$function_stmts,
$statements_analyzer,
$storage->return_type,
$this->source->getFQCLN(),
$storage->return_type_location,
$context->has_returned,
$global_context && ($global_context->inside_call || $global_context->inside_return)
);
$closure_yield_types = [];
$closure_return_types = ReturnTypeCollector::getReturnTypes(
$codebase,
$type_provider,
$function_stmts,
$closure_yield_types,
true
);
$closure_return_type = $closure_return_types
? \Psalm\Type::combineUnionTypeArray(
$closure_return_types,
$codebase
)
: Type::getVoid();
$closure_yield_type = $closure_yield_types
? \Psalm\Type::combineUnionTypeArray(
$closure_yield_types,
$codebase
)
: null;
if ($closure_yield_type) {
$closure_return_type = $closure_yield_type;
}
if ($function_type = $statements_analyzer->node_data->getType($this->function)) {
/**
* @var Type\Atomic\TClosure
*/
$closure_atomic = \array_values($function_type->getAtomicTypes())[0];
if (($storage->return_type === $storage->signature_return_type)
&& (!$storage->return_type
|| $storage->return_type->hasMixed()
|| UnionTypeComparator::isContainedBy(
$codebase,
$closure_return_type,
$storage->return_type
))
) {
$closure_atomic->return_type = $closure_return_type;
}
$closure_atomic->is_pure = !$this->inferred_impure;
}
}
if ($codebase->collect_references
&& !$context->collect_initializations
&& !$context->collect_mutations
&& $codebase->find_unused_variables
&& $context->check_variables
) {
$this->checkParamReferences(
$statements_analyzer,
$storage,
$appearing_class_storage,
$context
);
}
foreach ($storage->throws as $expected_exception => $_) {
if (($expected_exception === 'self'
|| $expected_exception === 'static')
&& $context->self
) {
$expected_exception = $context->self;
}
if (isset($storage->throw_locations[$expected_exception])) {
if (ClassLikeAnalyzer::checkFullyQualifiedClassLikeName(
$statements_analyzer,
$expected_exception,
$storage->throw_locations[$expected_exception],
$context->self,
$context->calling_method_id,
$statements_analyzer->getSuppressedIssues(),
new ClassLikeNameOptions(
false,
false,
true,
true,
true
)
)) {
$input_type = new Type\Union([new TNamedObject($expected_exception)]);
$container_type = new Type\Union([new TNamedObject('Exception'), new TNamedObject('Throwable')]);
if (!UnionTypeComparator::isContainedBy($codebase, $input_type, $container_type)) {
if (IssueBuffer::accepts(
new \Psalm\Issue\InvalidThrow(
'Class supplied for @throws ' . $expected_exception
. ' does not implement Throwable',
$storage->throw_locations[$expected_exception],
$expected_exception
),
$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
}
if ($codebase->alter_code) {
$codebase->classlikes->handleDocblockTypeInMigration(
$codebase,
$this,
$input_type,
$storage->throw_locations[$expected_exception],
$context->calling_method_id
);
}
}
}
}
foreach ($statements_analyzer->getUncaughtThrows($context) as $possibly_thrown_exception => $codelocations) {
$is_expected = false;
foreach ($storage->throws as $expected_exception => $_) {
if ($expected_exception === $possibly_thrown_exception
|| $codebase->classExtendsOrImplements($possibly_thrown_exception, $expected_exception)
) {
$is_expected = true;
break;
}
}
if (!$is_expected) {
foreach ($codelocations as $codelocation) {
// issues are suppressed in ThrowAnalyzer, CallAnalyzer, etc.
if (IssueBuffer::accepts(
new MissingThrowsDocblock(
$possibly_thrown_exception . ' is thrown but not caught - please either catch'
. ' or add a @throws annotation',
$codelocation
)
)) {
// fall through
}
}
}
}
if ($codebase->taint_flow_graph
&& $this->function instanceof ClassMethod
&& $cased_method_id
&& $storage->specialize_call
&& isset($context->vars_in_scope['$this'])
&& $context->vars_in_scope['$this']->parent_nodes
) {
$method_source = DataFlowNode::getForMethodReturn(
(string) $method_id,
$cased_method_id,
$storage->location
);
$codebase->taint_flow_graph->addNode($method_source);
foreach ($context->vars_in_scope['$this']->parent_nodes as $parent_node) {
$codebase->taint_flow_graph->addPath(
$parent_node,
$method_source,
'$this'
);
}
}
if ($add_mutations) {
if ($this->return_vars_in_scope !== null) {
$context->vars_in_scope = TypeAnalyzer::combineKeyedTypes(
$context->vars_in_scope,
$this->return_vars_in_scope
);
}
if ($this->return_vars_possibly_in_scope !== null) {
$context->vars_possibly_in_scope = array_merge(
$context->vars_possibly_in_scope,
$this->return_vars_possibly_in_scope
);
}
foreach ($context->vars_in_scope as $var => $_) {
if (strpos($var, '$this->') !== 0 && $var !== '$this') {
unset($context->vars_in_scope[$var]);
}
}
foreach ($context->vars_possibly_in_scope as $var => $_) {
if (strpos($var, '$this->') !== 0 && $var !== '$this') {
unset($context->vars_possibly_in_scope[$var]);
}
}
if ($hash
&& $real_method_id
&& $this instanceof MethodAnalyzer
&& !$context->collect_initializations
) {
$new_hash = md5($real_method_id . '::' . $context->getScopeSummary());
if ($new_hash === $hash) {
self::$no_effects_hashes[$hash] = true;
}
}
}
$event = new AfterFunctionLikeAnalysisEvent(
$this->function,
$storage,
$this,
$codebase,
[],
$type_provider,
$context
);
if ($codebase->config->eventDispatcher->dispatchAfterFunctionLikeAnalysis($event) === false) {
return false;
}
$file_manipulations = $event->getFileReplacements();
if ($file_manipulations) {
\Psalm\Internal\FileManipulation\FileManipulationBuffer::add(
$this->getFilePath(),
$file_manipulations
);
}
foreach ($storage->attributes as $attribute) {
AttributeAnalyzer::analyze(
$this,
$attribute,
$storage->suppressed_issues + $this->getSuppressedIssues(),
$storage instanceof MethodStorage ? 4 : 2
);
}
return null;
}
private function checkParamReferences(
StatementsAnalyzer $statements_analyzer,
FunctionLikeStorage $storage,
?\Psalm\Storage\ClassLikeStorage $class_storage,
Context $context
) : void {
$codebase = $statements_analyzer->getCodebase();
$unused_params = [];
foreach ($statements_analyzer->getUnusedVarLocations() as [$var_name, $original_location]) {
if (!array_key_exists(substr($var_name, 1), $storage->param_lookup)) {
continue;
}
if (strpos($var_name, '$_') === 0 || (strpos($var_name, '$unused') === 0 && $var_name !== '$unused')) {
continue;
}
$position = array_search(substr($var_name, 1), array_keys($storage->param_lookup), true);
if ($position === false) {
throw new \UnexpectedValueException('$position should not be false here');
}
if ($storage->params[$position]->by_ref) {
continue;
}
if ($storage->params[$position]->promoted_property) {
continue;
}
$did_match_param = false;
foreach ($this->function->params as $param) {
if ($param->var->getAttribute('endFilePos') === $original_location->raw_file_end) {
$did_match_param = true;
break;
}
}
if (!$did_match_param) {
continue;
}
$assignment_node = DataFlowNode::getForAssignment($var_name, $original_location);
if ($statements_analyzer->data_flow_graph instanceof \Psalm\Internal\Codebase\VariableUseGraph
&& $statements_analyzer->data_flow_graph->isVariableUsed($assignment_node)
) {
continue;
}
if (!$storage instanceof MethodStorage
|| !$storage->cased_name
|| $storage->visibility === ClassLikeAnalyzer::VISIBILITY_PRIVATE
) {
if ($this instanceof ClosureAnalyzer) {
if (IssueBuffer::accepts(
new UnusedClosureParam(
'Param ' . $var_name . ' is never referenced in this method',
$original_location
),
$this->getSuppressedIssues()
)) {
// fall through
}
} else {
if (IssueBuffer::accepts(
new UnusedParam(
'Param ' . $var_name . ' is never referenced in this method',
$original_location
),
$this->getSuppressedIssues()
)) {
// fall through
}
}
} else {
$fq_class_name = (string)$context->self;
$class_storage = $codebase->classlike_storage_provider->get($fq_class_name);
$method_name_lc = strtolower($storage->cased_name);
if ($storage->abstract) {
continue;
}
if (isset($class_storage->overridden_method_ids[$method_name_lc])) {
$parent_method_id = end($class_storage->overridden_method_ids[$method_name_lc]);
if ($parent_method_id) {
$parent_method_storage = $codebase->methods->getStorage($parent_method_id);
// if the parent method has a param at that position and isn't abstract
if (!$parent_method_storage->abstract
&& isset($parent_method_storage->params[$position])
) {
continue;
}
}
}
$unused_params[$position] = $original_location;
}
}
if ($storage instanceof MethodStorage
&& $this instanceof MethodAnalyzer
&& $class_storage
&& $storage->cased_name
&& $storage->visibility !== ClassLikeAnalyzer::VISIBILITY_PRIVATE
) {
$method_id_lc = strtolower((string) $this->getMethodId());
foreach ($storage->params as $i => $_) {
if (!isset($unused_params[$i])) {
$codebase->file_reference_provider->addMethodParamUse(
$method_id_lc,
$i,
$method_id_lc
);
$method_name_lc = strtolower($storage->cased_name);
if (!isset($class_storage->overridden_method_ids[$method_name_lc])) {
continue;
}
foreach ($class_storage->overridden_method_ids[$method_name_lc] as $parent_method_id) {
$codebase->file_reference_provider->addMethodParamUse(
strtolower((string) $parent_method_id),
$i,
$method_id_lc
);
}
}
}
}
}
/**
* @param array<int, \Psalm\Storage\FunctionLikeParameter> $params
*/
private function processParams(
StatementsAnalyzer $statements_analyzer,
FunctionLikeStorage $storage,
?string $cased_method_id,
array $params,
Context $context,
bool $has_template_types
) : bool {
$check_stmts = true;
$codebase = $statements_analyzer->getCodebase();
$project_analyzer = $statements_analyzer->getProjectAnalyzer();
foreach ($params as $offset => $function_param) {
$signature_type = $function_param->signature_type;
$signature_type_location = $function_param->signature_type_location;
if ($signature_type && $signature_type_location && $signature_type->hasObjectType()) {
$referenced_type = $signature_type;
if ($referenced_type->isNullable()) {
$referenced_type = clone $referenced_type;
$referenced_type->removeType('null');
}
[$start, $end] = $signature_type_location->getSelectionBounds();
$codebase->analyzer->addOffsetReference(
$this->getFilePath(),
$start,
$end,
(string) $referenced_type
);
}
if ($signature_type) {
$signature_type = \Psalm\Internal\Type\TypeExpander::expandUnion(
$codebase,
$signature_type,
$context->self,
$context->self,
$this->getParentFQCLN()
);
}
if ($function_param->type) {
$param_type = clone $function_param->type;
$param_type = \Psalm\Internal\Type\TypeExpander::expandUnion(
$codebase,
$param_type,
$context->self,
$context->self,
$this->getParentFQCLN(),
true,
false,
false,
true
);
if ($function_param->type_location) {
if ($param_type->check(
$this,