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ReturnTypeAnalyzer.php
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ReturnTypeAnalyzer.php
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<?php
namespace Psalm\Internal\Analyzer\FunctionLike;
use PhpParser;
use PhpParser\Node\Expr\ArrowFunction;
use PhpParser\Node\Expr\Closure;
use PhpParser\Node\FunctionLike;
use PhpParser\Node\Stmt\ClassMethod;
use PhpParser\Node\Stmt\Function_;
use Psalm\CodeLocation;
use Psalm\Config;
use Psalm\Context;
use Psalm\Exception\UnresolvableConstantException;
use Psalm\Internal\Analyzer\ClassAnalyzer;
use Psalm\Internal\Analyzer\FunctionLikeAnalyzer;
use Psalm\Internal\Analyzer\InterfaceAnalyzer;
use Psalm\Internal\Analyzer\ProjectAnalyzer;
use Psalm\Internal\Analyzer\ScopeAnalyzer;
use Psalm\Internal\Analyzer\SourceAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\Call\ClassTemplateParamCollector;
use Psalm\Internal\Analyzer\StatementsAnalyzer;
use Psalm\Internal\Analyzer\TraitAnalyzer;
use Psalm\Internal\FileManipulation\FunctionDocblockManipulator;
use Psalm\Internal\Provider\NodeDataProvider;
use Psalm\Internal\Type\Comparator\TypeComparisonResult;
use Psalm\Internal\Type\Comparator\UnionTypeComparator;
use Psalm\Internal\Type\TemplateResult;
use Psalm\Internal\Type\TemplateStandinTypeReplacer;
use Psalm\Internal\Type\TypeExpander;
use Psalm\Issue\ImplicitToStringCast;
use Psalm\Issue\InvalidFalsableReturnType;
use Psalm\Issue\InvalidNullableReturnType;
use Psalm\Issue\InvalidParent;
use Psalm\Issue\InvalidReturnType;
use Psalm\Issue\InvalidToString;
use Psalm\Issue\LessSpecificReturnType;
use Psalm\Issue\MismatchingDocblockReturnType;
use Psalm\Issue\MissingClosureReturnType;
use Psalm\Issue\MissingReturnType;
use Psalm\Issue\MixedInferredReturnType;
use Psalm\Issue\MixedReturnTypeCoercion;
use Psalm\Issue\MoreSpecificReturnType;
use Psalm\Issue\UnresolvableConstant;
use Psalm\IssueBuffer;
use Psalm\StatementsSource;
use Psalm\Storage\FunctionLikeStorage;
use Psalm\Storage\MethodStorage;
use Psalm\Type;
use Psalm\Type\Atomic\TNamedObject;
use Psalm\Type\Atomic\TNull;
use Psalm\Type\Union;
use function array_diff;
use function count;
use function implode;
use function in_array;
use function strpos;
use function strtolower;
/**
* @internal
*/
class ReturnTypeAnalyzer
{
/**
* @param Closure|Function_|ClassMethod|ArrowFunction $function
* @param PhpParser\Node\Stmt[] $function_stmts
* @param string[] $compatible_method_ids
* @return false|null
* @psalm-suppress PossiblyUnusedReturnValue unused but seems important
* @psalm-suppress ComplexMethod Unavoidably complex method
*/
public static function verifyReturnType(
FunctionLike $function,
array $function_stmts,
SourceAnalyzer $source,
NodeDataProvider $type_provider,
FunctionLikeAnalyzer $function_like_analyzer,
?Union $return_type = null,
?string $fq_class_name = null,
?string $static_fq_class_name = null,
?CodeLocation $return_type_location = null,
array $compatible_method_ids = [],
bool $did_explicitly_return = false,
bool $closure_inside_call = false
): ?bool {
$suppressed_issues = $function_like_analyzer->getSuppressedIssues();
$codebase = $source->getCodebase();
$project_analyzer = $source->getProjectAnalyzer();
$function_like_storage = null;
if ($source instanceof StatementsAnalyzer) {
$function_like_storage = $function_like_analyzer->getFunctionLikeStorage($source);
} elseif ($source instanceof ClassAnalyzer
|| $source instanceof TraitAnalyzer
) {
$function_like_storage = $function_like_analyzer->getFunctionLikeStorage();
}
$cased_method_id = $function_like_analyzer->getCorrectlyCasedMethodId();
if (!$function->getStmts() &&
(
$function instanceof ClassMethod &&
($source instanceof InterfaceAnalyzer || $function->isAbstract())
)
) {
if (!$return_type) {
IssueBuffer::maybeAdd(
new MissingReturnType(
'Method ' . $cased_method_id . ' does not have a return type',
new CodeLocation($function_like_analyzer, $function->name, null, true)
),
$suppressed_issues
);
}
return null;
}
$is_to_string = $function instanceof ClassMethod && strtolower($function->name->name) === '__tostring';
if ($function instanceof ClassMethod
&& strpos($function->name->name, '__') === 0
&& !$is_to_string
&& !$return_type
) {
// do not check __construct, __set, __get, __call etc.
return null;
}
if (!$return_type_location) {
$return_type_location = new CodeLocation(
$function_like_analyzer,
$function instanceof Closure || $function instanceof ArrowFunction ? $function : $function->name
);
}
$inferred_yield_types = [];
$inferred_return_type_parts = ReturnTypeCollector::getReturnTypes(
$codebase,
$type_provider,
$function_stmts,
$inferred_yield_types,
true
);
if (!$inferred_return_type_parts) {
$did_explicitly_return = true;
}
if ((!$return_type || $return_type->from_docblock)
&& ScopeAnalyzer::getControlActions(
$function_stmts,
$type_provider,
[]
) !== [ScopeAnalyzer::ACTION_END]
&& !$inferred_yield_types
&& count($inferred_return_type_parts)
&& !$did_explicitly_return
) {
// only add null if we have a return statement elsewhere and it wasn't void
foreach ($inferred_return_type_parts as $inferred_return_type_part) {
if (!$inferred_return_type_part->isVoid()) {
$atomic_null = new TNull(true);
$inferred_return_type_parts[] = new Union([$atomic_null]);
break;
}
}
}
$control_actions = ScopeAnalyzer::getControlActions(
$function_stmts,
$type_provider,
[],
false
);
$function_always_exits = $control_actions === [ScopeAnalyzer::ACTION_END];
$function_returns_implicitly = (bool) array_diff(
$control_actions,
[ScopeAnalyzer::ACTION_END, ScopeAnalyzer::ACTION_RETURN]
);
/** @psalm-suppress PossiblyUndefinedStringArrayOffset */
if ($return_type
&& (!$return_type->from_docblock
|| ($return_type->isNullable()
&& !$return_type->hasTemplate()
&& !$return_type->getAtomicTypes()['null']->from_docblock
)
)
&& !$return_type->isVoid()
&& !$inferred_yield_types
&& (!$function_like_storage || !$function_like_storage->has_yield)
&& $function_returns_implicitly
) {
if (IssueBuffer::accepts(
new InvalidReturnType(
'Not all code paths of ' . $cased_method_id . ' end in a return statement, return type '
. $return_type . ' expected',
$return_type_location
),
$suppressed_issues
)) {
return false;
}
return null;
}
if ($return_type
&& $return_type->isNever()
&& !$inferred_yield_types
&& !$function_always_exits
) {
if (IssueBuffer::accepts(
new InvalidReturnType(
$cased_method_id . ' is not expected to return any values but it does, '
. 'either implicitly or explicitly',
$return_type_location
),
$suppressed_issues
)) {
return false;
}
return null;
}
$inferred_return_type = $inferred_return_type_parts
? Type::combineUnionTypeArray($inferred_return_type_parts, $codebase)
: Type::getVoid();
if ($function_always_exits) {
$inferred_return_type = Type::getNever();
}
$inferred_yield_type = $inferred_yield_types
? Type::combineUnionTypeArray($inferred_yield_types, $codebase)
: null;
if ($inferred_yield_type) {
$inferred_return_type = $inferred_yield_type;
}
$unsafe_return_type = false;
// prevent any return types that do not return a value from being used in PHP typehints
if ($codebase->alter_code
&& $inferred_return_type->isNullable()
&& !$inferred_yield_types
) {
foreach ($inferred_return_type_parts as $inferred_return_type_part) {
if ($inferred_return_type_part->isVoid()) {
$unsafe_return_type = true;
break;
}
}
}
$inferred_return_type = TypeExpander::expandUnion(
$codebase,
$inferred_return_type,
$source->getFQCLN(),
$source->getFQCLN(),
$source->getParentFQCLN()
);
// hack until we have proper yield type collection
if ($function_like_storage
&& $function_like_storage->has_yield
&& !$inferred_yield_type
&& !$inferred_return_type->isVoid()
) {
$inferred_return_type = new Union([new TNamedObject('Generator')]);
}
if ($is_to_string) {
$union_comparison_results = new TypeComparisonResult();
if (!$inferred_return_type->hasMixed() &&
!UnionTypeComparator::isContainedBy(
$codebase,
$inferred_return_type,
Type::getString(),
$inferred_return_type->ignore_nullable_issues,
$inferred_return_type->ignore_falsable_issues,
$union_comparison_results
)
) {
if (IssueBuffer::accepts(
new InvalidToString(
'__toString methods must return a string, ' . $inferred_return_type . ' returned',
$return_type_location
),
$suppressed_issues
)) {
return false;
}
}
if ($union_comparison_results->to_string_cast) {
IssueBuffer::maybeAdd(
new ImplicitToStringCast(
'The declared return type for ' . $cased_method_id . ' expects string, ' .
'\'' . $inferred_return_type . '\' provided with a __toString method',
$return_type_location
),
$suppressed_issues
);
}
return null;
}
if (!$return_type) {
if ($function instanceof Closure || $function instanceof ArrowFunction) {
if (!$closure_inside_call || $inferred_return_type->isMixed()) {
if ($codebase->alter_code
&& isset($project_analyzer->getIssuesToFix()['MissingClosureReturnType'])
&& !in_array('MissingClosureReturnType', $suppressed_issues)
) {
if ($inferred_return_type->hasMixed() || $inferred_return_type->isNull()) {
return null;
}
self::addOrUpdateReturnType(
$function,
$project_analyzer,
$inferred_return_type,
$source,
($project_analyzer->only_replace_php_types_with_non_docblock_types
|| $unsafe_return_type)
&& $inferred_return_type->from_docblock,
$function_like_storage
);
return null;
}
IssueBuffer::maybeAdd(
new MissingClosureReturnType(
'Closure does not have a return type, expecting ' . $inferred_return_type->getId(),
new CodeLocation($function_like_analyzer, $function, null, true)
),
$suppressed_issues,
!$inferred_return_type->hasMixed() && !$inferred_return_type->isNull()
);
}
return null;
}
if ($codebase->alter_code
&& isset($project_analyzer->getIssuesToFix()['MissingReturnType'])
&& !in_array('MissingReturnType', $suppressed_issues)
) {
if ($inferred_return_type->hasMixed() || $inferred_return_type->isNull()) {
return null;
}
self::addOrUpdateReturnType(
$function,
$project_analyzer,
$inferred_return_type,
$source,
$compatible_method_ids
|| !$did_explicitly_return
|| (($project_analyzer->only_replace_php_types_with_non_docblock_types
|| $unsafe_return_type)
&& $inferred_return_type->from_docblock),
$function_like_storage
);
return null;
}
IssueBuffer::maybeAdd(
new MissingReturnType(
'Method ' . $cased_method_id . ' does not have a return type' .
(!$inferred_return_type->hasMixed() ? ', expecting ' . $inferred_return_type->getId() : ''),
new CodeLocation($function_like_analyzer, $function->name, null, true)
),
$suppressed_issues,
!$inferred_return_type->hasMixed() && !$inferred_return_type->isNull()
);
return null;
}
$self_fq_class_name = $fq_class_name ?: $source->getFQCLN();
$parent_class = null;
$classlike_storage = null;
if ($self_fq_class_name) {
$classlike_storage = $codebase->classlike_storage_provider->get($self_fq_class_name);
$parent_class = $classlike_storage->parent_class;
}
// passing it through fleshOutTypes eradicates errant $ vars
$declared_return_type = TypeExpander::expandUnion(
$codebase,
$return_type,
$self_fq_class_name,
$static_fq_class_name,
$parent_class,
true,
true,
($function_like_storage instanceof MethodStorage && $function_like_storage->final)
|| ($classlike_storage && $classlike_storage->final)
);
if (!$inferred_return_type_parts
&& !$inferred_return_type->isNever()
&& !$inferred_yield_types
&& (!$function_like_storage || !$function_like_storage->has_yield)
) {
if ($declared_return_type->isVoid() || $declared_return_type->isNever()) {
return null;
}
if (ScopeAnalyzer::onlyThrowsOrExits($type_provider, $function_stmts)) {
// if there's a single throw statement, it's presumably an exception saying this method is not to be
// used
return null;
}
if ($codebase->alter_code
&& isset($project_analyzer->getIssuesToFix()['InvalidReturnType'])
&& !in_array('InvalidReturnType', $suppressed_issues)
) {
self::addOrUpdateReturnType(
$function,
$project_analyzer,
Type::getVoid(),
$source,
$compatible_method_ids
|| (($project_analyzer->only_replace_php_types_with_non_docblock_types
|| $unsafe_return_type)
&& $inferred_return_type->from_docblock)
);
return null;
}
if (!$declared_return_type->from_docblock || !$declared_return_type->isNullable()) {
if (IssueBuffer::accepts(
new InvalidReturnType(
'No return statements were found for method ' . $cased_method_id .
' but return type \'' . $declared_return_type . '\' was expected',
$return_type_location
),
$suppressed_issues,
true
)) {
return false;
}
}
return null;
}
if (!$declared_return_type->hasMixed()) {
if ($inferred_return_type->isVoid()
&& ($declared_return_type->isVoid() || ($function_like_storage && $function_like_storage->has_yield))
) {
return null;
}
if ($inferred_return_type->hasMixed()) {
if (IssueBuffer::accepts(
new MixedInferredReturnType(
'Could not verify return type \'' . $declared_return_type . '\' for ' .
$cased_method_id,
$return_type_location
),
$suppressed_issues
)) {
return false;
}
return null;
}
$union_comparison_results = new TypeComparisonResult();
if ($declared_return_type->explicit_never === true && $inferred_return_type->explicit_never === false) {
if (IssueBuffer::accepts(
new MoreSpecificReturnType(
'The declared return type \'' . $declared_return_type->getId() . '|never\' for '
. $cased_method_id . ' is more specific than the inferred return type '
. '\'' . $inferred_return_type->getId() . '\'',
$return_type_location
),
$suppressed_issues
)) {
return false;
}
}
if (!$declared_return_type->isNever()
&& $function_always_exits
// never return type only available from PHP 8.1 in non-docblock
&& ($declared_return_type->from_docblock || $codebase->analysis_php_version_id >= 8_10_00)
// no error for single throw, as extending a class might not work without errors
// https://3v4l.org/vCSF4#v8.1.12
&& !ScopeAnalyzer::onlyThrows($function_stmts)
) {
if ($codebase->alter_code
&& isset($project_analyzer->getIssuesToFix()['InvalidReturnType'])
&& !in_array('InvalidReturnType', $suppressed_issues)
) {
self::addOrUpdateReturnType(
$function,
$project_analyzer,
Type::getNever(),
$source,
($project_analyzer->only_replace_php_types_with_non_docblock_types
|| $unsafe_return_type)
&& $inferred_return_type->from_docblock,
$function_like_storage
);
return null;
}
if (IssueBuffer::accepts(
new InvalidReturnType(
'The declared return type \''
. $declared_return_type->getId()
. '\' for ' . $cased_method_id
. ' is incorrect, got \'never\'',
$return_type_location
),
$suppressed_issues,
true
)) {
return false;
}
}
if (!UnionTypeComparator::isContainedBy(
$codebase,
$inferred_return_type,
$declared_return_type,
true,
true,
$union_comparison_results
)) {
// is the declared return type more specific than the inferred one?
if ($union_comparison_results->type_coerced) {
if ($union_comparison_results->type_coerced_from_mixed) {
if (!$union_comparison_results->type_coerced_from_as_mixed) {
if (IssueBuffer::accepts(
new MixedReturnTypeCoercion(
'The declared return type \'' . $declared_return_type->getId() . '\' for '
. $cased_method_id . ' is more specific than the inferred return type '
. '\'' . $inferred_return_type->getId() . '\'',
$return_type_location
),
$suppressed_issues
)) {
return false;
}
}
} else {
if (IssueBuffer::accepts(
new MoreSpecificReturnType(
'The declared return type \'' . $declared_return_type->getId() . '\' for '
. $cased_method_id . ' is more specific than the inferred return type '
. '\'' . $inferred_return_type->getId() . '\'',
$return_type_location
),
$suppressed_issues
)) {
return false;
}
}
} else {
if ($codebase->alter_code
&& isset($project_analyzer->getIssuesToFix()['InvalidReturnType'])
&& !in_array('InvalidReturnType', $suppressed_issues)
) {
self::addOrUpdateReturnType(
$function,
$project_analyzer,
$inferred_return_type,
$source,
($project_analyzer->only_replace_php_types_with_non_docblock_types
|| $unsafe_return_type)
&& $inferred_return_type->from_docblock,
$function_like_storage
);
return null;
}
if (IssueBuffer::accepts(
new InvalidReturnType(
'The declared return type \''
. $declared_return_type->getId()
. '\' for ' . $cased_method_id
. ' is incorrect, got \''
. $inferred_return_type->getId()
. '\''
. ($union_comparison_results->missing_shape_fields
? ' which is different due to additional array shape fields ('
. implode(', ', $union_comparison_results->missing_shape_fields)
. ')'
: ''),
$return_type_location
),
$suppressed_issues,
true
)) {
return false;
}
}
} elseif (!UnionTypeComparator::isContainedBy(
$codebase,
$declared_return_type,
$inferred_return_type,
false,
false
)) {
if ($codebase->alter_code) {
if (isset($project_analyzer->getIssuesToFix()['LessSpecificReturnType'])
&& !in_array('LessSpecificReturnType', $suppressed_issues)
&& !($function_like_storage instanceof MethodStorage && $function_like_storage->inheritdoc)
) {
self::addOrUpdateReturnType(
$function,
$project_analyzer,
$inferred_return_type,
$source,
$compatible_method_ids
|| (($project_analyzer->only_replace_php_types_with_non_docblock_types
|| $unsafe_return_type)
&& $inferred_return_type->from_docblock),
$function_like_storage
);
}
} else {
if ($function instanceof Function_
|| $function instanceof Closure
|| $function instanceof ArrowFunction
|| $function->isPrivate()
) {
$check_for_less_specific_type = true;
} elseif ($source instanceof StatementsAnalyzer) {
if ($function_like_storage instanceof MethodStorage) {
$check_for_less_specific_type = !$function_like_storage->overridden_somewhere;
} else {
$check_for_less_specific_type = false;
}
} else {
$check_for_less_specific_type = false;
}
if ($check_for_less_specific_type
&& (Config::getInstance()->restrict_return_types
|| (!$inferred_return_type->isNullable() && $declared_return_type->isNullable())
|| (!$inferred_return_type->isFalsable() && $declared_return_type->isFalsable()))
) {
if (IssueBuffer::accepts(
new LessSpecificReturnType(
'The inferred return type \''
. $inferred_return_type->getId()
. '\' for ' . $cased_method_id
. ' is more specific than the declared return type \''
. $declared_return_type->getId() . '\'',
$return_type_location
),
$suppressed_issues,
!($function_like_storage instanceof MethodStorage && $function_like_storage->inheritdoc)
)) {
return false;
}
}
}
}
if ($union_comparison_results->to_string_cast) {
IssueBuffer::maybeAdd(
new ImplicitToStringCast(
'The declared return type for ' . $cased_method_id . ' expects \'' .
$declared_return_type . '\', ' . '\'' . $inferred_return_type .
'\' provided with a __toString method',
$return_type_location
),
$suppressed_issues
);
}
if (!$inferred_return_type->ignore_nullable_issues
&& $inferred_return_type->isNullable()
&& !$declared_return_type->isNullable()
&& !$declared_return_type->hasTemplate()
&& !$declared_return_type->isVoid()
) {
if ($codebase->alter_code
&& isset($project_analyzer->getIssuesToFix()['InvalidNullableReturnType'])
&& !in_array('InvalidNullableReturnType', $suppressed_issues)
&& !$inferred_return_type->isNull()
) {
self::addOrUpdateReturnType(
$function,
$project_analyzer,
$inferred_return_type,
$source,
($project_analyzer->only_replace_php_types_with_non_docblock_types
|| $unsafe_return_type)
&& $inferred_return_type->from_docblock,
$function_like_storage
);
return null;
}
if (IssueBuffer::accepts(
new InvalidNullableReturnType(
'The declared return type \'' . $declared_return_type . '\' for ' . $cased_method_id .
' is not nullable, but \'' . $inferred_return_type . '\' contains null',
$return_type_location
),
$suppressed_issues,
!$inferred_return_type->isNull()
)) {
return false;
}
}
if (!$inferred_return_type->ignore_falsable_issues
&& $inferred_return_type->isFalsable()
&& !$declared_return_type->isFalsable()
&& !$declared_return_type->hasBool()
&& !$declared_return_type->hasScalar()
) {
if ($codebase->alter_code
&& isset($project_analyzer->getIssuesToFix()['InvalidFalsableReturnType'])
) {
self::addOrUpdateReturnType(
$function,
$project_analyzer,
$inferred_return_type,
$source,
($project_analyzer->only_replace_php_types_with_non_docblock_types
|| $unsafe_return_type)
&& $inferred_return_type->from_docblock,
$function_like_storage
);
return null;
}
if (IssueBuffer::accepts(
new InvalidFalsableReturnType(
'The declared return type \'' . $declared_return_type . '\' for ' . $cased_method_id .
' does not allow false, but \'' . $inferred_return_type . '\' contains false',
$return_type_location
),
$suppressed_issues,
true
)) {
return false;
}
}
}
return null;
}
/**
* @param Closure|Function_|ClassMethod|ArrowFunction $function
* @return false|null
*/
public static function checkReturnType(
FunctionLike $function,
ProjectAnalyzer $project_analyzer,
FunctionLikeAnalyzer $function_like_analyzer,
FunctionLikeStorage $storage,
Context $context
): ?bool {
$codebase = $project_analyzer->getCodebase();
if (!$storage->return_type || !$storage->return_type_location) {
return null;
}
$parent_class = null;
$classlike_storage = null;
if ($context->self) {
$classlike_storage = $codebase->classlike_storage_provider->get($context->self);
$parent_class = $classlike_storage->parent_class;
}
if (!$storage->signature_return_type || $storage->signature_return_type === $storage->return_type) {
foreach ($storage->return_type->getAtomicTypes() as $type) {
if ($type instanceof TNamedObject
&& 'parent' === $type->value
&& null === $parent_class
) {
if (IssueBuffer::accepts(
new InvalidParent(
'Cannot use parent as a return type when class has no parent',
$storage->return_type_location
),
$storage->suppressed_issues
)) {
return false;
}
return null;
}
}
$fleshed_out_return_type = TypeExpander::expandUnion(
$codebase,
$storage->return_type,
$classlike_storage->name ?? null,
$classlike_storage->name ?? null,
$parent_class
);
/** @psalm-suppress UnusedMethodCall This call actually has the side effect of creating issues */
$fleshed_out_return_type->check(
$function_like_analyzer,
$storage->return_type_location,
$storage->suppressed_issues,
[],
false,
false,
false,
$context->calling_method_id
);
return null;
}
$fleshed_out_signature_type = TypeExpander::expandUnion(
$codebase,
$storage->signature_return_type,
$classlike_storage->name ?? null,
$classlike_storage->name ?? null,
$parent_class
);
if ($fleshed_out_signature_type->check(
$function_like_analyzer,
$storage->signature_return_type_location ?: $storage->return_type_location,
$storage->suppressed_issues,
[],
false
) === false) {
return false;
}
if ($function instanceof Closure || $function instanceof ArrowFunction) {
return null;
}
try {
$fleshed_out_return_type = TypeExpander::expandUnion(
$codebase,
$storage->return_type,
$classlike_storage->name ?? null,
$classlike_storage->name ?? null,
$parent_class,
true,
true,
false,
false,
false,
true,
);
} catch (UnresolvableConstantException $e) {
IssueBuffer::maybeAdd(
new UnresolvableConstant(
"Could not resolve constant {$e->class_name}::{$e->const_name}",
$storage->return_type_location
),
$storage->suppressed_issues,
true
);
$fleshed_out_return_type = $storage->return_type;
}
if ($fleshed_out_return_type->check(
$function_like_analyzer,
$storage->return_type_location,
$storage->suppressed_issues,
[],
false,
$storage instanceof MethodStorage && $storage->inherited_return_type
) === false) {
return false;
}
if ($classlike_storage && $context->self) {
$class_template_params = ClassTemplateParamCollector::collect(
$codebase,
$classlike_storage,
$codebase->classlike_storage_provider->get($context->self),
strtolower($function->name->name),
new TNamedObject($context->self),
true
);
$class_template_params = $class_template_params ?: [];
if ($class_template_params) {
$template_result = new TemplateResult(
$class_template_params,
[]
);
$fleshed_out_return_type = TemplateStandinTypeReplacer::replace(
$fleshed_out_return_type,
$template_result,
$codebase,
null,
null,
null
);
}
}
$union_comparison_result = new TypeComparisonResult();
if (!UnionTypeComparator::isContainedBy(
$codebase,
$fleshed_out_return_type,
$fleshed_out_signature_type,
false,
false,
$union_comparison_result
) && !$union_comparison_result->type_coerced_from_mixed
) {
if ($codebase->alter_code
&& isset($project_analyzer->getIssuesToFix()['MismatchingDocblockReturnType'])
) {
self::addOrUpdateReturnType(
$function,
$project_analyzer,
$storage->signature_return_type,
$function_like_analyzer->getSource()
);
return null;
}
if (IssueBuffer::accepts(
new MismatchingDocblockReturnType(
'Docblock has incorrect return type \'' . $storage->return_type->getId() .
'\', should be \'' . $storage->signature_return_type->getId() . '\'',
$storage->return_type_location
),
$storage->suppressed_issues,
true
)) {
return false;
}
}
return null;
}
/**
* @param Closure|Function_|ClassMethod|ArrowFunction $function
*/
private static function addOrUpdateReturnType(
FunctionLike $function,
ProjectAnalyzer $project_analyzer,
Union $inferred_return_type,
StatementsSource $source,
bool $docblock_only = false,
?FunctionLikeStorage $function_like_storage = null
): void {
$manipulator = FunctionDocblockManipulator::getForFunction(
$project_analyzer,
$source->getFilePath(),
$function
);
$codebase = $project_analyzer->getCodebase();
$is_final = true;
$fqcln = $source->getFQCLN();
if ($fqcln !== null && $function instanceof ClassMethod) {
$class_storage = $codebase->classlike_storage_provider->get($fqcln);
$is_final = $function->isFinal() || $class_storage->final;
}