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Reconciler.php
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Reconciler.php
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<?php
declare(strict_types=1);
namespace Psalm\Type;
use InvalidArgumentException;
use Psalm\CodeLocation;
use Psalm\Codebase;
use Psalm\Internal\Analyzer\StatementsAnalyzer;
use Psalm\Internal\Codebase\TaintFlowGraph;
use Psalm\Internal\Codebase\VariableUseGraph;
use Psalm\Internal\MethodIdentifier;
use Psalm\Internal\Type\AssertionReconciler;
use Psalm\Internal\Type\TypeExpander;
use Psalm\Issue\DocblockTypeContradiction;
use Psalm\Issue\PsalmInternalError;
use Psalm\Issue\RedundantCondition;
use Psalm\Issue\RedundantConditionGivenDocblockType;
use Psalm\Issue\RedundantPropertyInitializationCheck;
use Psalm\Issue\TypeDoesNotContainNull;
use Psalm\Issue\TypeDoesNotContainType;
use Psalm\IssueBuffer;
use Psalm\Storage\Assertion;
use Psalm\Storage\Assertion\ArrayKeyDoesNotExist;
use Psalm\Storage\Assertion\ArrayKeyExists;
use Psalm\Storage\Assertion\Empty_;
use Psalm\Storage\Assertion\Falsy;
use Psalm\Storage\Assertion\HasArrayKey;
use Psalm\Storage\Assertion\HasIntOrStringArrayAccess;
use Psalm\Storage\Assertion\HasStringArrayAccess;
use Psalm\Storage\Assertion\IsEqualIsset;
use Psalm\Storage\Assertion\IsIdentical;
use Psalm\Storage\Assertion\IsIsset;
use Psalm\Storage\Assertion\IsNotIsset;
use Psalm\Storage\Assertion\IsNotLooselyEqual;
use Psalm\Storage\Assertion\NestedAssertions;
use Psalm\Storage\Assertion\NonEmpty;
use Psalm\Storage\Assertion\NonEmptyCountable;
use Psalm\Storage\Assertion\NotNestedAssertions;
use Psalm\Storage\Assertion\Truthy;
use Psalm\Type;
use Psalm\Type\Atomic\TArray;
use Psalm\Type\Atomic\TArrayKey;
use Psalm\Type\Atomic\TBool;
use Psalm\Type\Atomic\TClassStringMap;
use Psalm\Type\Atomic\TFalse;
use Psalm\Type\Atomic\TInt;
use Psalm\Type\Atomic\TKeyedArray;
use Psalm\Type\Atomic\TLiteralInt;
use Psalm\Type\Atomic\TLiteralString;
use Psalm\Type\Atomic\TMixed;
use Psalm\Type\Atomic\TNamedObject;
use Psalm\Type\Atomic\TNever;
use Psalm\Type\Atomic\TNull;
use Psalm\Type\Atomic\TObject;
use Psalm\Type\Atomic\TString;
use Psalm\Type\Atomic\TTemplateParam;
use ReflectionProperty;
use UnexpectedValueException;
use function array_keys;
use function array_merge;
use function array_pop;
use function array_shift;
use function array_values;
use function count;
use function explode;
use function implode;
use function is_numeric;
use function key;
use function ksort;
use function preg_match;
use function preg_quote;
use function str_contains;
use function str_ends_with;
use function str_replace;
use function str_split;
use function strlen;
use function strpos;
use function strtolower;
use function substr;
class Reconciler
{
public const RECONCILIATION_OK = 0;
public const RECONCILIATION_REDUNDANT = 1;
public const RECONCILIATION_EMPTY = 2;
/** @var array<string, non-empty-list<string>> */
private static array $broken_paths = [];
/**
* Takes two arrays and consolidates them, removing null values from existing types where applicable.
* Returns a tuple of [new_types, new_references].
*
* @param array<string, array<array<int, Assertion>>> $new_types
* @param array<string, array<array<int, Assertion>>> $active_new_types - types we can complain about
* @param array<string, Union> $existing_types
* @param array<string, string> $existing_references Maps keys of $existing_types that are references to other
* keys of $existing_types that they are references to.
* @param array<string, bool> $changed_var_ids
* @param array<string, bool> $referenced_var_ids
* @param array<string, array<string, Union>> $template_type_map
* @return array{array<string, Union>, array<string, string>}
* @psalm-suppress ComplexMethod
*/
public static function reconcileKeyedTypes(
array $new_types,
array $active_new_types,
array $existing_types,
array $existing_references,
array &$changed_var_ids,
array $referenced_var_ids,
StatementsAnalyzer $statements_analyzer,
array $template_type_map = [],
bool $inside_loop = false,
?CodeLocation $code_location = null,
bool $negated = false,
): array {
if (!$new_types) {
return [$existing_types, $existing_references];
}
$reference_graph = [];
if (!empty($existing_references)) {
// PHP behaves oddly when passing an array containing references: https://bugs.php.net/bug.php?id=20993
// To work around the issue, if there are any references, we have to recreate the array and fix the
// references so they're properly scoped and won't affect the caller. Starting with a new array is
// required for some unclear reason, just cloning elements of the existing array doesn't work properly.
$old_existing_types = $existing_types;
$existing_types = [];
$cloned_referenceds = [];
foreach ($existing_references as $reference => $referenced) {
if (!isset($cloned_referenceds[$referenced])) {
$existing_types[$referenced] = $old_existing_types[$referenced];
$cloned_referenceds[$referenced] = true;
}
$existing_types[$reference] = &$existing_types[$referenced];
}
$existing_types += $old_existing_types;
// Build a map from reference/referenced variables to other variables with the same reference
foreach ($existing_references as $reference => $referenced) {
$reference_graph[$reference][$referenced] = true;
foreach ($reference_graph[$referenced] ?? [] as $existing_referenced => $_) {
$reference_graph[$existing_referenced][$reference] = true;
$reference_graph[$reference][$existing_referenced] = true;
}
$reference_graph[$referenced][$reference] = true;
}
}
$suppressed_issues = $statements_analyzer->getSuppressedIssues();
$old_new_types = $new_types;
$new_types = self::addNestedAssertions($new_types, $existing_types);
// make sure array keys come after base keys
ksort($new_types);
$codebase = $statements_analyzer->getCodebase();
foreach ($new_types as $key => $new_type_parts) {
if (strpos($key, '::')
&& !strpos($key, '$')
&& !strpos($key, '[')
) {
continue;
}
$has_negation = false;
$has_isset = false;
$has_inverted_isset = false;
$has_inverted_key_exists = false;
$has_truthy_or_falsy_or_empty = false;
$has_empty = false;
$has_count_check = false;
$is_real = ($old_new_types[$key] ?? null) === $new_type_parts;
$is_equality = $is_real;
foreach ($new_type_parts as $new_type_part_parts) {
foreach ($new_type_part_parts as $new_type_part_part) {
if ($new_type_part_part->isNegation()) {
$has_negation = true;
}
$has_isset = $has_isset
|| $new_type_part_part instanceof IsIsset
|| $new_type_part_part instanceof IsEqualIsset
|| $new_type_part_part instanceof ArrayKeyExists
|| $new_type_part_part instanceof HasStringArrayAccess;
$has_empty = $has_empty || $new_type_part_part instanceof Empty_;
$has_truthy_or_falsy_or_empty = $has_truthy_or_falsy_or_empty
|| $new_type_part_part instanceof NonEmpty
|| $new_type_part_part instanceof Truthy
|| $new_type_part_part instanceof Empty_
|| $new_type_part_part instanceof Falsy;
$is_equality = $is_equality
&& $new_type_part_part instanceof IsIdentical;
$has_inverted_isset = $has_inverted_isset
|| $new_type_part_part instanceof IsNotIsset;
$has_inverted_key_exists = $has_inverted_key_exists
|| $new_type_part_part instanceof ArrayKeyDoesNotExist;
$has_count_check = $has_count_check
|| $new_type_part_part instanceof NonEmptyCountable;
}
}
$did_type_exist = isset($existing_types[$key]);
$has_object_array_access = false;
$result_type = $existing_types[$key] ?? self::getValueForKey(
$codebase,
$key,
$existing_types,
$new_types,
$code_location,
$has_isset,
$has_inverted_isset,
$has_inverted_key_exists,
$has_empty,
$inside_loop,
$has_object_array_access,
);
if ($result_type && $result_type->isUnionEmpty()) {
throw new InvalidArgumentException('Union::$types cannot be empty after get value for ' . $key);
}
$before_adjustment = $result_type;
$failed_reconciliation = self::RECONCILIATION_OK;
foreach ($new_type_parts as $offset => $new_type_part_parts) {
$orred_type = null;
foreach ($new_type_part_parts as $new_type_part_part) {
if ($new_type_part_part instanceof NestedAssertions
|| $new_type_part_part instanceof NotNestedAssertions
) {
$data = $new_type_part_part->assertions;
if ($new_type_part_part instanceof NotNestedAssertions) {
$nested_negated = !$negated;
} else {
$nested_negated = $negated;
}
[$existing_types, $_] = self::reconcileKeyedTypes(
$data,
$data,
$existing_types,
$existing_references,
$changed_var_ids,
$referenced_var_ids,
$statements_analyzer,
$template_type_map,
$inside_loop,
$code_location,
$nested_negated,
);
$new_type_part_part = $nested_negated ? new Falsy() : new Truthy();
}
$result_type_candidate = AssertionReconciler::reconcile(
$new_type_part_part,
$result_type,
$key,
$statements_analyzer,
$inside_loop,
$template_type_map,
$code_location
&& isset($referenced_var_ids[$key])
&& isset($active_new_types[$key][$offset])
? $code_location
: null,
$suppressed_issues,
$failed_reconciliation,
$negated,
);
if ($result_type_candidate->isUnionEmpty()) {
$result_type_candidate = $result_type_candidate->getBuilder()->addType(new TNever)->freeze();
}
$orred_type = Type::combineUnionTypes(
$result_type_candidate,
$orred_type,
$codebase,
);
}
$result_type = $orred_type;
}
if (!$result_type) {
throw new UnexpectedValueException('$result_type should not be null');
}
if (!$did_type_exist && $result_type->isNever()) {
continue;
}
if (($statements_analyzer->data_flow_graph instanceof TaintFlowGraph
&& (!$result_type->hasScalarType()
|| ($result_type->hasString() && !$result_type->hasLiteralString())))
|| $statements_analyzer->data_flow_graph instanceof VariableUseGraph
) {
if ($before_adjustment && $before_adjustment->parent_nodes) {
$result_type = $result_type->setParentNodes($before_adjustment->parent_nodes);
} elseif (!$did_type_exist && $code_location) {
$result_type = $result_type->setParentNodes(
$statements_analyzer->getParentNodesForPossiblyUndefinedVariable(
$key,
),
);
}
}
if ($before_adjustment && $before_adjustment->by_ref) {
$result_type = $result_type->setByRef(true);
}
$type_changed = !$before_adjustment
|| !$result_type->equals($before_adjustment)
|| $result_type->different
|| $before_adjustment->different;
$key_parts = self::breakUpPathIntoParts($key);
if ($type_changed || $failed_reconciliation) {
$changed_var_ids[$key] = true;
if (str_ends_with($key, ']')
&& !$has_inverted_isset
&& !$has_inverted_key_exists
&& !$has_empty
&& !$is_equality
) {
self::adjustTKeyedArrayType(
$key_parts,
$existing_types,
$changed_var_ids,
$result_type,
);
} elseif ($key !== '$this') {
foreach ($existing_types as $new_key => $_) {
if ($new_key === $key) {
continue;
}
if (!isset($new_types[$new_key])
&& preg_match('/' . preg_quote($key, '/') . '[\]\[\-]/', $new_key)
&& $is_real
) {
// Fix any references to the type before removing it.
$references_to_fix = array_keys($reference_graph[$new_key] ?? []);
if (count($references_to_fix) > 1) {
// Still multiple references, just remove $new_key
foreach ($references_to_fix as $reference_to_fix) {
unset($reference_graph[$reference_to_fix][$new_key]);
}
// Set references pointing to $new_key to point
// to the first other reference from the same group
$new_primary_reference = (string) key($reference_graph[$references_to_fix[0]]);
unset($existing_references[$new_primary_reference]);
foreach ($existing_references as $existing_reference => $existing_referenced) {
if ($existing_referenced === $new_key) {
$existing_references[$existing_reference] = $new_primary_reference;
}
}
} elseif (count($references_to_fix) === 1) {
// Since reference target is going to be removed,
// pretend the reference is just a normal variable
$reference_to_fix = $references_to_fix[0];
unset($reference_graph[$reference_to_fix], $existing_references[$reference_to_fix]);
}
unset(
$existing_types[$new_key],
$reference_graph[$new_key],
$existing_references[$new_key],
);
}
}
}
} elseif (!$has_negation && !$has_truthy_or_falsy_or_empty && !$has_isset) {
$changed_var_ids[$key] = true;
}
if ($failed_reconciliation === self::RECONCILIATION_EMPTY) {
$result_type = $result_type->setProperties(['failed_reconciliation' => true]);
}
if (!$has_object_array_access) {
$existing_types[$key] = $result_type;
}
if (!$did_type_exist && isset($existing_types[$key]) && isset($reference_graph[$key_parts[0]])) {
// If key is new, create references for other variables that reference the root variable.
$reference_key_parts = $key_parts;
foreach ($reference_graph[$key_parts[0]] as $reference => $_) {
$reference_key_parts[0] = $reference;
$reference_key = implode("", $reference_key_parts);
$existing_types[$reference_key] = &$existing_types[$key];
}
}
}
return [$existing_types, $existing_references];
}
/**
* This generates a list of extra assertions for an assertion on a nested key.
*
* For example ['$a[0]->foo->bar' => 'isset']
*
* generates the assertions
*
* [
* '$a' => '=int-or-string-array-access',
* '$a[0]' => '=isset',
* '$a[0]->foo' => '=isset',
* '$a[0]->foo->bar' => 'isset' // original assertion
* ]
*
* @param array<string, array<array<int, Assertion>>> $new_types
* @param array<string, Union> $existing_types
* @return array<string, array<array<int, Assertion>>>
*/
private static function addNestedAssertions(array $new_types, array $existing_types): array
{
foreach ($new_types as $nk => $type) {
if (strpos($nk, '[') || strpos($nk, '->')) {
$type = array_values($type);
if (!isset($type[0][0])) {
continue;
}
if ($type[0][0] instanceof IsEqualIsset
|| $type[0][0] instanceof IsIsset
|| $type[0][0] instanceof NonEmpty
) {
$key_parts = self::breakUpPathIntoParts($nk);
$base_key = array_shift($key_parts);
if ($base_key[0] !== '$' && count($key_parts) > 2 && $key_parts[0] === '::$') {
$base_key .= array_shift($key_parts);
$base_key .= array_shift($key_parts);
}
if (!isset($existing_types[$base_key]) || $existing_types[$base_key]->isNullable()) {
if (!isset($new_types[$base_key])) {
$new_types[$base_key] = [[new IsEqualIsset()]];
} else {
$new_types[$base_key][] = [new IsEqualIsset()];
}
}
while ($key_parts) {
$divider = array_shift($key_parts);
if ($divider === '[') {
$array_key = (string) array_shift($key_parts);
array_shift($key_parts);
$new_base_key = $base_key . '[' . $array_key . ']';
if (str_contains($array_key, '\'')) {
$new_types[$base_key][] = [new HasStringArrayAccess()];
} else {
$new_types[$base_key][] = [new HasIntOrStringArrayAccess()];
}
$base_key = $new_base_key;
continue;
}
if ($divider === '->') {
$property_name = array_shift($key_parts);
$new_base_key = $base_key . '->' . $property_name;
if (!isset($new_types[$base_key])) {
$new_types[$base_key] = [[new IsEqualIsset()]];
}
$base_key = $new_base_key;
} else {
break;
}
if (!$key_parts) {
break;
}
if (!isset($new_types[$base_key])) {
$new_types[$base_key] = [
[new IsNotLooselyEqual(new TBool())],
[new IsNotLooselyEqual(new TInt())],
[new IsEqualIsset()],
];
} else {
$new_types[$base_key][] = [new IsNotLooselyEqual(new TBool())];
$new_types[$base_key][] = [new IsNotLooselyEqual(new TInt())];
$new_types[$base_key][] = [new IsEqualIsset()];
}
}
}
if ($type[0][0] instanceof ArrayKeyExists) {
$key_parts = self::breakUpPathIntoParts($nk);
if (count($key_parts) === 4
&& $key_parts[1] === '['
&& $key_parts[2][0] !== '\''
&& !is_numeric($key_parts[2])
&& strpos($key_parts[2], '::class') === (strlen($key_parts[2])-7)
) {
if ($key_parts[0][0] === '$') {
if (isset($new_types[$key_parts[0]])) {
$new_types[$key_parts[0]][] = [new HasArrayKey($key_parts[2])];
} else {
$new_types[$key_parts[0]] = [[new HasArrayKey($key_parts[2])]];
}
}
}
}
}
}
return $new_types;
}
/**
* @return non-empty-list<string>
*/
public static function breakUpPathIntoParts(string $path): array
{
if (isset(self::$broken_paths[$path])) {
return self::$broken_paths[$path];
}
$chars = str_split($path);
$string_char = null;
$escape_char = false;
$brackets = 0;
$parts = [''];
$parts_offset = 0;
for ($i = 0, $char_count = count($chars); $i < $char_count; ++$i) {
$char = $chars[$i];
if ($string_char) {
if ($char === $string_char && !$escape_char) {
$string_char = null;
}
if ($char === '\\') {
$escape_char = !$escape_char;
}
$parts[$parts_offset] .= $char;
continue;
}
switch ($char) {
case '[':
case ']':
$parts_offset++;
$parts[$parts_offset] = $char;
++$parts_offset;
if ($char === '[') {
$brackets++;
} else {
$brackets--;
}
continue 2;
case '\'':
case '"':
if (!isset($parts[$parts_offset])) {
$parts[$parts_offset] = '';
}
$parts[$parts_offset] .= $char;
$string_char = $char;
continue 2;
case ':':
if (!$brackets
&& $i < $char_count - 2
&& $chars[$i + 1] === ':'
&& $chars[$i + 2] === '$'
) {
++$i;
++$i;
++$parts_offset;
$parts[$parts_offset] = '::$';
++$parts_offset;
continue 2;
}
// fall through
case '-':
if (!$brackets
&& $i < $char_count - 1
&& $chars[$i + 1] === '>'
) {
++$i;
++$parts_offset;
$parts[$parts_offset] = '->';
++$parts_offset;
continue 2;
}
// fall through
// no break
default:
if (!isset($parts[$parts_offset])) {
$parts[$parts_offset] = '';
}
$parts[$parts_offset] .= $char;
}
}
$parts = array_values($parts);
self::$broken_paths[$path] = $parts;
return $parts;
}
/**
* Gets the type for a given (non-existent key) based on the passed keys
*
* @param array<string, Union> $existing_keys
* @param array<string,mixed> $new_assertions
*/
private static function getValueForKey(
Codebase $codebase,
string $key,
array &$existing_keys,
array $new_assertions,
?CodeLocation $code_location,
bool $has_isset,
bool $has_inverted_isset,
bool $has_inverted_key_exists,
bool $has_empty,
bool $inside_loop,
bool &$has_object_array_access,
): ?Union {
$key_parts = self::breakUpPathIntoParts($key);
if (count($key_parts) === 1) {
return $existing_keys[$key_parts[0]] ?? null;
}
$base_key = array_shift($key_parts);
if ($base_key[0] !== '$' && count($key_parts) > 2 && $key_parts[0] === '::$') {
$base_key .= array_shift($key_parts);
$base_key .= array_shift($key_parts);
}
if (!isset($existing_keys[$base_key])) {
if (strpos($base_key, '::')) {
[$fq_class_name, $const_name] = explode('::', $base_key);
if (!$codebase->classlikes->classOrInterfaceExists($fq_class_name)) {
return null;
}
$class_constant = $codebase->classlikes->getClassConstantType(
$fq_class_name,
$const_name,
ReflectionProperty::IS_PRIVATE,
null,
);
if ($class_constant) {
$existing_keys[$base_key] = $class_constant;
} else {
return null;
}
} else {
return null;
}
}
while ($key_parts) {
$divider = array_shift($key_parts);
if ($divider === '[') {
$array_key = (string) array_shift($key_parts);
array_shift($key_parts);
$new_base_key = $base_key . '[' . $array_key . ']';
if (!isset($existing_keys[$new_base_key])) {
$new_base_type = null;
$atomic_types = $existing_keys[$base_key]->getAtomicTypes();
while ($atomic_types) {
$existing_key_type_part = array_shift($atomic_types);
if ($existing_key_type_part instanceof TTemplateParam) {
$atomic_types = array_merge($atomic_types, $existing_key_type_part->as->getAtomicTypes());
continue;
}
if ($existing_key_type_part instanceof TArray) {
if ($has_empty) {
return null;
}
$new_base_type_candidate = $existing_key_type_part->type_params[1];
if ($new_base_type_candidate->isMixed()
&& !$has_isset
&& !$has_inverted_isset
&& !$has_inverted_key_exists
) {
return $new_base_type_candidate;
}
if (($has_isset || $has_inverted_isset || $has_inverted_key_exists)
&& isset($new_assertions[$new_base_key])
) {
if ($has_inverted_isset && $new_base_key === $key) {
$new_base_type_candidate = $new_base_type_candidate->getBuilder();
$new_base_type_candidate->addType(new TNull);
$new_base_type_candidate->possibly_undefined = true;
$new_base_type_candidate = $new_base_type_candidate->freeze();
} else {
$new_base_type_candidate = $new_base_type_candidate->setPossiblyUndefined(true);
}
}
} elseif ($existing_key_type_part instanceof TNull
|| $existing_key_type_part instanceof TFalse
) {
$new_base_type_candidate = Type::getNull();
if ($existing_keys[$base_key]->ignore_nullable_issues) {
/** @psalm-suppress InaccessibleProperty We just created this type */
$new_base_type_candidate->ignore_nullable_issues = true;
}
} elseif ($existing_key_type_part instanceof TClassStringMap) {
return Type::getMixed();
} elseif ($existing_key_type_part instanceof TNever
|| ($existing_key_type_part instanceof TMixed
&& $existing_key_type_part->from_loop_isset)
) {
return Type::getMixed($inside_loop);
} elseif ($existing_key_type_part instanceof TString) {
$new_base_type_candidate = Type::getString();
} elseif ($existing_key_type_part instanceof TNamedObject
&& ($has_isset || $has_inverted_isset || $has_inverted_key_exists)
) {
$has_object_array_access = true;
unset($existing_keys[$new_base_key]);
return null;
} elseif (!$existing_key_type_part instanceof TKeyedArray) {
return Type::getMixed();
} elseif ($array_key[0] === '$' || ($array_key[0] !== '\'' && !is_numeric($array_key[0]))) {
if ($has_empty) {
return null;
}
$new_base_type_candidate = $existing_key_type_part->getGenericValueType(true);
} else {
$array_properties = $existing_key_type_part->properties;
$key_parts_key = str_replace('\'', '', $array_key);
if (!isset($array_properties[$key_parts_key])) {
if ($existing_key_type_part->fallback_params !== null) {
$new_base_type_candidate = $existing_key_type_part
->fallback_params[1]->setDifferent(true);
} else {
return null;
}
} else {
$new_base_type_candidate = $array_properties[$key_parts_key];
}
}
$new_base_type = Type::combineUnionTypes(
$new_base_type,
$new_base_type_candidate,
$codebase,
);
$existing_keys[$new_base_key] = $new_base_type;
}
}
$base_key = $new_base_key;
} elseif ($divider === '->' || $divider === '::$') {
$property_name = (string) array_shift($key_parts);
$new_base_key = $base_key . $divider . $property_name;
if (!isset($existing_keys[$new_base_key])) {
$new_base_type = null;
$atomic_types = $existing_keys[$base_key]->getAtomicTypes();
while ($atomic_types) {
$existing_key_type_part = array_shift($atomic_types);
if ($existing_key_type_part instanceof TTemplateParam) {
$atomic_types = array_merge($atomic_types, $existing_key_type_part->as->getAtomicTypes());
continue;
}
if ($existing_key_type_part instanceof TNull) {
$class_property_type = Type::getNull();
} elseif ($existing_key_type_part instanceof TMixed
|| $existing_key_type_part instanceof TObject
|| ($existing_key_type_part instanceof TNamedObject
&& strtolower($existing_key_type_part->value) === 'stdclass')
) {
$class_property_type = Type::getMixed();
} elseif ($existing_key_type_part instanceof TNamedObject) {
if (!$codebase->classOrInterfaceExists($existing_key_type_part->value)) {
$class_property_type = Type::getMixed();
} else {
if (str_ends_with($property_name, '()')) {
$method_id = new MethodIdentifier(
$existing_key_type_part->value,
strtolower(substr($property_name, 0, -2)),
);
if (!$codebase->methods->methodExists($method_id)) {
return null;
}
$declaring_method_id = $codebase->methods->getDeclaringMethodId(
$method_id,
);
if ($declaring_method_id === null) {
return null;
}
$declaring_class = $declaring_method_id->fq_class_name;
$method_return_type = $codebase->methods->getMethodReturnType(
$method_id,
$declaring_class,
null,
null,
);
if ($method_return_type) {
$class_property_type = TypeExpander::expandUnion(
$codebase,
$method_return_type,
$declaring_class,
$declaring_class,
null,
);
} else {
$class_property_type = Type::getMixed();
}
} else {
$class_property_type = self::getPropertyType(
$codebase,
$existing_key_type_part->value,
$property_name,
);
if (!$class_property_type) {
return null;
}
}
}
} else {
$class_property_type = Type::getMixed();
}
$new_base_type = Type::combineUnionTypes(
$new_base_type,
$class_property_type,
$codebase,
);
$existing_keys[$new_base_key] = $new_base_type;
}
}
$base_key = $new_base_key;
} else {
return null;
}
}
if (!isset($existing_keys[$base_key])) {
if ($code_location) {
IssueBuffer::add(
new PsalmInternalError(
'Unknown key ' . $base_key,
$code_location,
),
);
}
return null;
}
return $existing_keys[$base_key];
}
private static function getPropertyType(
Codebase $codebase,
string $fq_class_name,
string $property_name,
): ?Union {
$property_id = $fq_class_name . '::$' . $property_name;
if (!$codebase->properties->propertyExists($property_id, true)) {
$declaring_class_storage = $codebase->classlike_storage_provider->get(
$fq_class_name,
);
return $declaring_class_storage->pseudo_property_get_types['$' . $property_name] ?? null;
}
$declaring_property_class = $codebase->properties->getDeclaringClassForProperty(
$property_id,
true,
);
if ($declaring_property_class === null) {
return null;
}
$class_property_type = $codebase->properties->getPropertyType(
$property_id,
false,
null,
null,
);
$declaring_class_storage = $codebase->classlike_storage_provider->get(
$declaring_property_class,
);
if ($class_property_type) {
return TypeExpander::expandUnion(
$codebase,
$class_property_type,
$declaring_class_storage->name,
$declaring_class_storage->name,
null,
);
}
return Type::getMixed();
}
/**
* @param string[] $suppressed_issues
*/
protected static function triggerIssueForImpossible(
Union|MutableUnion $existing_var_type,
string $old_var_type_string,
string $key,
Assertion $assertion,
bool $redundant,
bool $negated,
CodeLocation $code_location,
array $suppressed_issues,
): void {
$assertion_string = (string)$assertion;
$not = $assertion_string[0] === '!';
if ($not) {
$assertion_string = substr($assertion_string, 1);
}