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AssertionReconciler.php
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AssertionReconciler.php
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<?php
namespace Psalm\Internal\Type;
use Exception;
use Psalm\CodeLocation;
use Psalm\Codebase;
use Psalm\Exception\TypeParseTreeException;
use Psalm\Internal\Analyzer\Statements\Expression\Fetch\VariableFetchAnalyzer;
use Psalm\Internal\Analyzer\StatementsAnalyzer;
use Psalm\Internal\Analyzer\TraitAnalyzer;
use Psalm\Internal\Type\Comparator\AtomicTypeComparator;
use Psalm\Internal\Type\Comparator\TypeComparisonResult;
use Psalm\Internal\Type\Comparator\UnionTypeComparator;
use Psalm\Issue\DocblockTypeContradiction;
use Psalm\Issue\InvalidDocblock;
use Psalm\Issue\TypeDoesNotContainNull;
use Psalm\Issue\TypeDoesNotContainType;
use Psalm\IssueBuffer;
use Psalm\Type;
use Psalm\Type\Atomic;
use Psalm\Type\Atomic\TArray;
use Psalm\Type\Atomic\TClassConstant;
use Psalm\Type\Atomic\TClassString;
use Psalm\Type\Atomic\TEnumCase;
use Psalm\Type\Atomic\TFloat;
use Psalm\Type\Atomic\TGenericObject;
use Psalm\Type\Atomic\TInt;
use Psalm\Type\Atomic\TIntRange;
use Psalm\Type\Atomic\TIterable;
use Psalm\Type\Atomic\TKeyedArray;
use Psalm\Type\Atomic\TList;
use Psalm\Type\Atomic\TLiteralClassString;
use Psalm\Type\Atomic\TLiteralFloat;
use Psalm\Type\Atomic\TLiteralInt;
use Psalm\Type\Atomic\TLiteralString;
use Psalm\Type\Atomic\TMixed;
use Psalm\Type\Atomic\TNamedObject;
use Psalm\Type\Atomic\TPositiveInt;
use Psalm\Type\Atomic\TString;
use Psalm\Type\Atomic\TTemplateParam;
use Psalm\Type\Reconciler;
use Psalm\Type\Union;
use function array_intersect_key;
use function array_merge;
use function count;
use function explode;
use function get_class;
use function is_string;
use function strpos;
use function substr;
class AssertionReconciler extends Reconciler
{
/**
* Reconciles types
*
* think of this as a set of functions e.g. empty(T), notEmpty(T), null(T), notNull(T) etc. where
* - empty(Object) => null,
* - empty(bool) => false,
* - notEmpty(Object|null) => Object,
* - notEmpty(Object|false) => Object
*
* @param string[] $suppressed_issues
* @param array<string, array<string, Union>> $template_type_map
* @param-out 0|1|2 $failed_reconciliation
*/
public static function reconcile(
string $assertion,
?Union $existing_var_type,
?string $key,
StatementsAnalyzer $statements_analyzer,
bool $inside_loop,
array $template_type_map,
?CodeLocation $code_location = null,
array $suppressed_issues = [],
?int &$failed_reconciliation = Reconciler::RECONCILIATION_OK,
bool $negated = false
): Union {
$codebase = $statements_analyzer->getCodebase();
$is_strict_equality = false;
$is_loose_equality = false;
$is_equality = false;
$is_negation = false;
$failed_reconciliation = Reconciler::RECONCILIATION_OK;
if ($assertion[0] === '!') {
$assertion = substr($assertion, 1);
$is_negation = true;
}
if ($assertion[0] === '=') {
$assertion = substr($assertion, 1);
$is_strict_equality = true;
$is_equality = true;
}
if ($assertion[0] === '~') {
$assertion = substr($assertion, 1);
$is_loose_equality = true;
$is_equality = true;
}
$original_assertion = $assertion;
if ($assertion[0] === '@') {
$assertion = 'falsy';
$is_negation = true;
}
if ($existing_var_type === null
&& is_string($key)
&& VariableFetchAnalyzer::isSuperGlobal($key)
) {
$existing_var_type = VariableFetchAnalyzer::getGlobalType($key);
}
if ($existing_var_type === null) {
return self::getMissingType(
$assertion,
$is_negation,
$inside_loop,
$is_equality,
$template_type_map
);
}
$old_var_type_string = $existing_var_type->getId();
if ($is_negation) {
return NegatedAssertionReconciler::reconcile(
$statements_analyzer,
$assertion,
$is_strict_equality,
$is_loose_equality,
$existing_var_type,
$template_type_map,
$old_var_type_string,
$key,
$negated,
$code_location,
$suppressed_issues,
$failed_reconciliation,
$inside_loop
);
}
$simply_reconciled_type = SimpleAssertionReconciler::reconcile(
$assertion,
$codebase,
$existing_var_type,
$key,
$negated,
$code_location,
$suppressed_issues,
$failed_reconciliation,
$is_equality,
$is_strict_equality,
$inside_loop
);
if ($simply_reconciled_type) {
return $simply_reconciled_type;
}
if (strpos($assertion, 'isa-') === 0) {
$should_return = false;
$new_type = self::handleIsA(
$codebase,
$existing_var_type,
$assertion,
$template_type_map,
$code_location,
$key,
$suppressed_issues,
$should_return
);
if ($should_return) {
return $new_type;
}
} elseif (strpos($assertion, 'getclass-') === 0) {
$assertion = substr($assertion, 9);
$new_type = Type::parseString($assertion, null, $template_type_map);
} else {
$bracket_pos = strpos($assertion, '(');
if ($bracket_pos) {
return self::handleLiteralEquality(
$statements_analyzer,
$assertion,
$bracket_pos,
$is_loose_equality,
$existing_var_type,
$old_var_type_string,
$key,
$negated,
$code_location,
$suppressed_issues
);
}
if ($assertion === 'loaded-class-string') {
$assertion = 'class-string';
}
try {
$new_type = Type::parseString($assertion, null, $template_type_map);
} catch (TypeParseTreeException $e) {
$new_type = Type::getMixed();
}
}
if ($existing_var_type->hasMixed()) {
if ($is_loose_equality
&& $new_type->hasScalarType()
) {
return $existing_var_type;
}
return $new_type;
}
$refined_type = self::refine(
$statements_analyzer,
$assertion,
$original_assertion,
$new_type,
$existing_var_type,
$template_type_map,
$key,
$negated,
$code_location,
$is_equality,
$is_loose_equality,
$suppressed_issues,
$failed_reconciliation
);
return TypeExpander::expandUnion(
$codebase,
$refined_type,
null,
null,
null,
true,
false,
false,
true
);
}
/**
* @param array<string, array<string, Union>> $template_type_map
*/
private static function getMissingType(
string $assertion,
bool $is_negation,
bool $inside_loop,
bool $is_equality,
array $template_type_map
): Union {
if (($assertion === 'isset' && !$is_negation)
|| ($assertion === 'empty' && $is_negation)
) {
return Type::getMixed($inside_loop);
}
if ($assertion === 'array-key-exists'
|| $assertion === 'non-empty-countable'
|| strpos($assertion, 'has-at-least-') === 0
|| strpos($assertion, 'has-exactly-') === 0
) {
return Type::getMixed();
}
if (!$is_negation && $assertion !== 'falsy' && $assertion !== 'empty') {
if ($is_equality) {
$bracket_pos = strpos($assertion, '(');
if ($bracket_pos) {
$assertion = substr($assertion, 0, $bracket_pos);
}
}
try {
return Type::parseString($assertion, null, $template_type_map);
} catch (Exception $e) {
return Type::getMixed();
}
}
return Type::getMixed();
}
/**
* This method is called when SimpleAssertionReconciler was not enough. It receives the existing type, the assertion
* and also a new type created from the assertion string.
*
* @param 0|1|2 $failed_reconciliation
* @param string[] $suppressed_issues
* @param array<string, array<string, Union>> $template_type_map
* @param-out 0|1|2 $failed_reconciliation
*/
private static function refine(
StatementsAnalyzer $statements_analyzer,
string $assertion,
string $original_assertion,
Union $new_type,
Union $existing_var_type,
array $template_type_map,
?string $key,
bool $negated,
?CodeLocation $code_location,
bool $is_equality,
bool $is_loose_equality,
array $suppressed_issues,
int &$failed_reconciliation
): Union {
$codebase = $statements_analyzer->getCodebase();
$old_var_type_string = $existing_var_type->getId();
$new_type_has_interface = false;
if ($new_type->hasObjectType()) {
foreach ($new_type->getAtomicTypes() as $new_type_part) {
if ($new_type_part instanceof TNamedObject &&
$codebase->interfaceExists($new_type_part->value)
) {
$new_type_has_interface = true;
break;
}
}
}
$old_type_has_interface = false;
if ($existing_var_type->hasObjectType()) {
foreach ($existing_var_type->getAtomicTypes() as $existing_type_part) {
if ($existing_type_part instanceof TNamedObject &&
$codebase->interfaceExists($existing_type_part->value)
) {
$old_type_has_interface = true;
break;
}
}
}
try {
if (strpos($assertion, '<') || strpos($assertion, '[') || strpos($assertion, '{')) {
$new_type_union = Type::parseString($assertion);
$new_type_part = $new_type_union->getSingleAtomic();
} else {
$new_type_part = Atomic::create($assertion, null, $template_type_map);
}
} catch (TypeParseTreeException $e) {
$new_type_part = new TMixed();
if ($code_location) {
IssueBuffer::maybeAdd(
new InvalidDocblock(
$assertion . ' cannot be used in an assertion',
$code_location
),
$suppressed_issues
);
}
}
if ($new_type_part instanceof TTemplateParam
&& $new_type_part->as->isSingle()
) {
$new_as_atomic = $new_type_part->as->getSingleAtomic();
$acceptable_atomic_types = [];
foreach ($existing_var_type->getAtomicTypes() as $existing_var_type_part) {
if ($existing_var_type_part instanceof TNamedObject
|| $existing_var_type_part instanceof TTemplateParam
) {
$new_type_part->addIntersectionType($existing_var_type_part);
$acceptable_atomic_types[] = clone $existing_var_type_part;
} else {
if (AtomicTypeComparator::isContainedBy(
$codebase,
$existing_var_type_part,
$new_as_atomic
)) {
$acceptable_atomic_types[] = clone $existing_var_type_part;
}
}
}
if ($acceptable_atomic_types) {
$new_type_part->as = new Union($acceptable_atomic_types);
return new Union([$new_type_part]);
}
}
if ($new_type_part instanceof TKeyedArray) {
$acceptable_atomic_types = [];
foreach ($existing_var_type->getAtomicTypes() as $existing_var_type_part) {
if ($existing_var_type_part instanceof TKeyedArray) {
if (!array_intersect_key(
$existing_var_type_part->properties,
$new_type_part->properties
)) {
$existing_var_type_part = clone $existing_var_type_part;
$existing_var_type_part->properties = array_merge(
$existing_var_type_part->properties,
$new_type_part->properties
);
$acceptable_atomic_types[] = $existing_var_type_part;
}
}
}
if ($acceptable_atomic_types) {
return new Union($acceptable_atomic_types);
}
}
if ($new_type_part instanceof TNamedObject
&& ($new_type_has_interface || $old_type_has_interface)
&& !UnionTypeComparator::canExpressionTypesBeIdentical(
$codebase,
$new_type,
$existing_var_type,
false
)
) {
$acceptable_atomic_types = [];
foreach ($existing_var_type->getAtomicTypes() as $existing_var_type_part) {
if (AtomicTypeComparator::isContainedBy(
$codebase,
$existing_var_type_part,
$new_type_part
)) {
$acceptable_atomic_types[] = clone $existing_var_type_part;
continue;
}
if ($existing_var_type_part instanceof TNamedObject
&& ($codebase->classExists($existing_var_type_part->value)
|| $codebase->interfaceExists($existing_var_type_part->value))
) {
$existing_var_type_part = clone $existing_var_type_part;
$existing_var_type_part->addIntersectionType($new_type_part);
$acceptable_atomic_types[] = $existing_var_type_part;
}
if ($existing_var_type_part instanceof TTemplateParam) {
$existing_var_type_part = clone $existing_var_type_part;
$existing_var_type_part->addIntersectionType($new_type_part);
$acceptable_atomic_types[] = $existing_var_type_part;
}
}
if ($acceptable_atomic_types) {
return new Union($acceptable_atomic_types);
}
} elseif (!$new_type->hasMixed()) {
$has_match = true;
if ($key
&& $code_location
&& $new_type->getId() === $existing_var_type->getId()
//even if two objects are the same, equality is not guaranteed
// example: (ErrorException and TypeError are both Throwable but not equal)
&& !$new_type->hasNamedObjectType()
&& !$is_equality
&& !($original_assertion === 'loaded-class-string' && $old_var_type_string === 'class-string')
&& (!($statements_analyzer->getSource()->getSource() instanceof TraitAnalyzer)
|| ($key !== '$this'
&& !($existing_var_type->hasLiteralClassString() && $new_type->hasLiteralClassString())))
) {
self::triggerIssueForImpossible(
$existing_var_type,
$old_var_type_string,
$key,
$original_assertion,
true,
$negated,
$code_location,
$suppressed_issues
);
}
$any_scalar_type_match_found = false;
if ($code_location
&& $key
&& !$is_equality
&& $new_type_part instanceof TNamedObject
&& !$new_type_has_interface
&& (!($statements_analyzer->getSource()->getSource() instanceof TraitAnalyzer)
|| ($key !== '$this'
&& !($existing_var_type->hasLiteralClassString() && $new_type->hasLiteralClassString())))
&& UnionTypeComparator::isContainedBy(
$codebase,
$existing_var_type,
$new_type,
false,
false,
null,
false,
false
)
) {
self::triggerIssueForImpossible(
$existing_var_type,
$old_var_type_string,
$key,
$original_assertion,
true,
$negated,
$code_location,
$suppressed_issues
);
}
$new_type = self::filterTypeWithAnother(
$codebase,
$existing_var_type,
$new_type,
$template_type_map,
$has_match,
$any_scalar_type_match_found
);
if ($code_location
&& !$has_match
&& (!$is_loose_equality || !$any_scalar_type_match_found)
) {
if ($assertion === 'null') {
if ($existing_var_type->from_docblock) {
IssueBuffer::maybeAdd(
new DocblockTypeContradiction(
'Cannot resolve types for ' . $key . ' - docblock-defined type '
. $existing_var_type . ' does not contain null',
$code_location,
$existing_var_type->getId() . ' null'
),
$suppressed_issues
);
} else {
IssueBuffer::maybeAdd(
new TypeDoesNotContainNull(
'Cannot resolve types for ' . $key . ' - ' . $existing_var_type
. ' does not contain null',
$code_location,
$existing_var_type->getId()
),
$suppressed_issues
);
}
} elseif (!($statements_analyzer->getSource()->getSource() instanceof TraitAnalyzer)
|| ($key !== '$this'
&& !($existing_var_type->hasLiteralClassString() && $new_type->hasLiteralClassString()))
) {
if ($existing_var_type->from_docblock) {
IssueBuffer::maybeAdd(
new DocblockTypeContradiction(
'Cannot resolve types for ' . $key . ' - docblock-defined type '
. $existing_var_type->getId() . ' does not contain ' . $new_type->getId(),
$code_location,
$existing_var_type->getId() . ' ' . $new_type->getId()
),
$suppressed_issues
);
} else {
IssueBuffer::maybeAdd(
new TypeDoesNotContainType(
'Cannot resolve types for ' . $key . ' - ' . $existing_var_type->getId()
. ' does not contain ' . $new_type->getId(),
$code_location,
$existing_var_type->getId() . ' ' . $new_type->getId()
),
$suppressed_issues
);
}
}
$failed_reconciliation = Reconciler::RECONCILIATION_EMPTY;
}
}
return $new_type;
}
/**
* This method receives two types. The goal is to use datas in the new type to reduce the existing_type to a more
* precise version. For example: new is `array<int>` old is `list<mixed>` so the result is `list<int>`
*
* @param array<string, array<string, Union>> $template_type_map
*
* @psalm-suppress ComplexMethod we'd probably want to extract specific handling blocks at the end and also allow
* early return once a specific case has been handled
*/
private static function filterTypeWithAnother(
Codebase $codebase,
Union $existing_type,
Union $new_type,
array $template_type_map,
bool &$has_match = false,
bool &$any_scalar_type_match_found = false
): Union {
$matching_atomic_types = [];
$has_cloned_type = false;
foreach ($new_type->getAtomicTypes() as $new_type_part) {
$has_local_match = false;
foreach ($existing_type->getAtomicTypes() as $key => $existing_type_part) {
// special workaround because PHP allows floats to contain ints, but we don’t want this
// behaviour here
if ($existing_type_part instanceof TFloat
&& $new_type_part instanceof TInt
) {
$any_scalar_type_match_found = true;
continue;
}
$atomic_comparison_results = new TypeComparisonResult();
if ($existing_type_part instanceof TNamedObject) {
$existing_type_part->was_static = false;
}
$atomic_contained_by = AtomicTypeComparator::isContainedBy(
$codebase,
$new_type_part,
$existing_type_part,
true,
false,
$atomic_comparison_results
);
if ($atomic_contained_by) {
$has_local_match = true;
if ($atomic_comparison_results->type_coerced
&& get_class($new_type_part) === TNamedObject::class
&& $existing_type_part instanceof TGenericObject
) {
// this is a hack - it's not actually rigorous, as the params may be different
$matching_atomic_types[] = new TGenericObject(
$new_type_part->value,
$existing_type_part->type_params
);
} elseif ($new_type_part instanceof TNamedObject
&& $existing_type_part instanceof TTemplateParam
&& $existing_type_part->as->hasObjectType()
) {
$existing_type_part = clone $existing_type_part;
$existing_type_part->as = self::filterTypeWithAnother(
$codebase,
$existing_type_part->as,
new Union([$new_type_part]),
$template_type_map
);
$matching_atomic_types[] = $existing_type_part;
} else {
$matching_atomic_types[] = clone $new_type_part;
}
continue;
}
if (AtomicTypeComparator::isContainedBy(
$codebase,
$existing_type_part,
$new_type_part,
false,
false,
null
)) {
$has_local_match = true;
$matching_atomic_types[] = $existing_type_part;
continue;
}
if ($existing_type_part instanceof TNamedObject
&& $new_type_part instanceof TNamedObject
&& ($codebase->interfaceExists($existing_type_part->value)
|| $codebase->interfaceExists($new_type_part->value))
) {
$matching_atomic_type = clone $new_type_part;
$matching_atomic_type->extra_types[$existing_type_part->getKey()] = $existing_type_part;
$matching_atomic_types[] = $matching_atomic_type;
$has_local_match = true;
continue;
}
if ($new_type_part instanceof TKeyedArray
&& $existing_type_part instanceof TList
) {
$new_type_key = $new_type_part->getGenericKeyType();
$new_type_value = $new_type_part->getGenericValueType();
if (!$new_type_key->hasString()) {
$has_param_match = false;
$new_type_value = self::filterTypeWithAnother(
$codebase,
$existing_type_part->type_param,
$new_type_value,
$template_type_map,
$has_param_match,
$any_scalar_type_match_found
);
$hybrid_type_part = new TKeyedArray($new_type_part->properties);
$hybrid_type_part->previous_key_type = Type::getInt();
$hybrid_type_part->previous_value_type = $new_type_value;
$hybrid_type_part->is_list = true;
if (!$has_cloned_type) {
$new_type = clone $new_type;
$has_cloned_type = true;
}
$has_local_match = true;
$new_type->removeType($key);
$new_type->addType($hybrid_type_part);
continue;
}
}
if ($new_type_part instanceof TTemplateParam
&& $existing_type_part instanceof TTemplateParam
&& $new_type_part->param_name !== $existing_type_part->param_name
&& $new_type_part->as->hasObject()
&& $existing_type_part->as->hasObject()
) {
$matching_atomic_type = clone $new_type_part;
$matching_atomic_type->extra_types[$existing_type_part->getKey()] = $existing_type_part;
$matching_atomic_types[] = $matching_atomic_type;
$has_local_match = true;
continue;
}
//we filter both types of standard iterables
if (($new_type_part instanceof TGenericObject
|| $new_type_part instanceof TArray
|| $new_type_part instanceof TIterable)
&& ($existing_type_part instanceof TGenericObject
|| $existing_type_part instanceof TArray
|| $existing_type_part instanceof TIterable)
&& count($new_type_part->type_params) === count($existing_type_part->type_params)
) {
$has_any_param_match = false;
foreach ($new_type_part->type_params as $i => $new_param) {
$existing_param = $existing_type_part->type_params[$i];
$has_param_match = true;
$new_param_id = $new_param->getId();
$new_param = self::filterTypeWithAnother(
$codebase,
$existing_param,
$new_param,
$template_type_map,
$has_param_match,
$any_scalar_type_match_found
);
if ($template_type_map) {
TemplateInferredTypeReplacer::replace(
$new_param,
new TemplateResult([], $template_type_map),
$codebase
);
}
$existing_type->bustCache();
if ($has_param_match
&& $existing_type_part->type_params[$i]->getId() !== $new_param_id
) {
/** @psalm-suppress PropertyTypeCoercion */
$existing_type_part->type_params[$i] = $new_param;
if (!$has_local_match) {
$has_any_param_match = true;
}
}
}
if ($has_any_param_match) {
$has_local_match = true;
$matching_atomic_types[] = $existing_type_part;
$atomic_comparison_results->type_coerced = true;
}
}
//we filter the second part of a list with the second part of standard iterables
if (($new_type_part instanceof TArray
|| $new_type_part instanceof TIterable)
&& $existing_type_part instanceof TList
) {
$has_any_param_match = false;
$new_param = $new_type_part->type_params[1];
$existing_param = $existing_type_part->type_param;
$has_param_match = true;
$new_param = self::filterTypeWithAnother(
$codebase,
$existing_param,
$new_param,
$template_type_map,
$has_param_match,
$any_scalar_type_match_found
);
if ($template_type_map) {
TemplateInferredTypeReplacer::replace(
$new_param,
new TemplateResult([], $template_type_map),
$codebase
);
}
$existing_type->bustCache();
if ($has_param_match
&& $existing_type_part->type_param->getId() !== $new_param->getId()
) {
$existing_type_part->type_param = $new_param;
if (!$has_local_match) {
$has_any_param_match = true;
}
}
if ($has_any_param_match) {
$has_local_match = true;
$matching_atomic_types[] = $existing_type_part;
$atomic_comparison_results->type_coerced = true;
}
}
//we filter each property of a Keyed Array with the second part of standard iterables
if (($new_type_part instanceof TArray
|| $new_type_part instanceof TIterable)
&& $existing_type_part instanceof TKeyedArray
) {
$has_any_param_match = false;
$new_param = $new_type_part->type_params[1];
foreach ($existing_type_part->properties as $property_key => $existing_param) {
$has_param_match = true;
$new_param = self::filterTypeWithAnother(
$codebase,
$existing_param,
$new_param,
$template_type_map,
$has_param_match,
$any_scalar_type_match_found
);
if ($template_type_map) {
TemplateInferredTypeReplacer::replace(
$new_param,
new TemplateResult([], $template_type_map),
$codebase
);
}
if ($has_param_match
&& $existing_type_part->properties[$property_key]->getId() !== $new_param->getId()
) {
$existing_type_part->properties[$property_key] = $new_param;
if (!$has_local_match) {
$has_any_param_match = true;
}
}
}
$existing_type->bustCache();
if ($has_any_param_match) {
$has_local_match = true;
$matching_atomic_types[] = $existing_type_part;
$atomic_comparison_results->type_coerced = true;
}
}
//These partial match wouldn't have been handled by AtomicTypeComparator
$new_range = null;
if ($new_type_part instanceof TIntRange && $existing_type_part instanceof TPositiveInt) {
$new_range = TIntRange::intersectIntRanges(
TIntRange::convertToIntRange($existing_type_part),
$new_type_part
);
} elseif ($existing_type_part instanceof TIntRange
&& $new_type_part instanceof TPositiveInt
) {
$new_range = TIntRange::intersectIntRanges(
$existing_type_part,
TIntRange::convertToIntRange($new_type_part)
);
} elseif ($new_type_part instanceof TIntRange
&& $existing_type_part instanceof TIntRange
) {
$new_range = TIntRange::intersectIntRanges(
$existing_type_part,
$new_type_part
);
}
if ($new_range !== null) {
$has_local_match = true;
$matching_atomic_types[] = $new_range;
}
if ($atomic_comparison_results->type_coerced) {
continue;
}
if ($atomic_comparison_results->scalar_type_match_found) {
$any_scalar_type_match_found = true;
}
}
if (!$has_local_match) {
$has_match = false;
break;
}
}
if ($matching_atomic_types) {
return new Union($matching_atomic_types);
}
return $new_type;
}
/**
* @param string[] $suppressed_issues
*/
private static function handleLiteralEquality(
StatementsAnalyzer $statements_analyzer,
string $assertion,
int $bracket_pos,
bool $is_loose_equality,
Union $existing_var_type,
string $old_var_type_string,
?string $var_id,
bool $negated,
?CodeLocation $code_location,
array $suppressed_issues
): Union {
$value = substr($assertion, $bracket_pos + 1, -1);
$scalar_type = substr($assertion, 0, $bracket_pos);
$existing_var_atomic_types = $existing_var_type->getAtomicTypes();
if ($scalar_type === 'int') {
return self::handleLiteralEqualityWithInt(
$statements_analyzer,
$assertion,
$bracket_pos,
$is_loose_equality,
$existing_var_type,
$old_var_type_string,
$var_id,
$negated,
$code_location,
$suppressed_issues
);
} elseif ($scalar_type === 'string'
|| $scalar_type === 'class-string'
|| $scalar_type === 'interface-string'
|| $scalar_type === 'callable-string'
|| $scalar_type === 'trait-string'