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ArrayAssignmentAnalyzer.php
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/
ArrayAssignmentAnalyzer.php
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<?php
namespace Psalm\Internal\Analyzer\Statements\Expression\Assignment;
use InvalidArgumentException;
use PhpParser;
use PhpParser\Node\Expr\Variable;
use Psalm\CodeLocation;
use Psalm\Codebase;
use Psalm\Context;
use Psalm\Internal\Analyzer\ClassLikeAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\ExpressionIdentifier;
use Psalm\Internal\Analyzer\Statements\Expression\Fetch\ArrayFetchAnalyzer;
use Psalm\Internal\Analyzer\Statements\ExpressionAnalyzer;
use Psalm\Internal\Analyzer\StatementsAnalyzer;
use Psalm\Internal\Codebase\VariableUseGraph;
use Psalm\Internal\DataFlow\DataFlowNode;
use Psalm\Internal\Type\TemplateInferredTypeReplacer;
use Psalm\Internal\Type\TemplateResult;
use Psalm\Issue\InvalidArrayAssignment;
use Psalm\IssueBuffer;
use Psalm\Type;
use Psalm\Type\Atomic\TArray;
use Psalm\Type\Atomic\TClassStringMap;
use Psalm\Type\Atomic\TDependentListKey;
use Psalm\Type\Atomic\TKeyedArray;
use Psalm\Type\Atomic\TList;
use Psalm\Type\Atomic\TLiteralClassString;
use Psalm\Type\Atomic\TLiteralInt;
use Psalm\Type\Atomic\TLiteralString;
use Psalm\Type\Atomic\TNonEmptyArray;
use Psalm\Type\Atomic\TNonEmptyList;
use Psalm\Type\Atomic\TString;
use Psalm\Type\Atomic\TTemplateIndexedAccess;
use Psalm\Type\Atomic\TTemplateKeyOf;
use Psalm\Type\Atomic\TTemplateParam;
use Psalm\Type\Atomic\TTemplateParamClass;
use Psalm\Type\Union;
use function array_pop;
use function array_reverse;
use function array_shift;
use function array_slice;
use function assert;
use function count;
use function end;
use function implode;
use function in_array;
use function is_string;
use function preg_match;
use function strlen;
/**
* @internal
*/
class ArrayAssignmentAnalyzer
{
public static function analyze(
StatementsAnalyzer $statements_analyzer,
PhpParser\Node\Expr\ArrayDimFetch $stmt,
Context $context,
?PhpParser\Node\Expr $assign_value,
Union $assignment_value_type
): void {
$nesting = 0;
$var_id = ExpressionIdentifier::getVarId(
$stmt->var,
$statements_analyzer->getFQCLN(),
$statements_analyzer,
$nesting
);
self::updateArrayType(
$statements_analyzer,
$stmt,
$assign_value,
$assignment_value_type,
$context
);
if (!$statements_analyzer->node_data->getType($stmt->var) && $var_id) {
$context->vars_in_scope[$var_id] = Type::getMixed();
}
}
/**
* @return false|null
* @psalm-suppress PossiblyUnusedReturnValue not used but seems important
*/
public static function updateArrayType(
StatementsAnalyzer $statements_analyzer,
PhpParser\Node\Expr\ArrayDimFetch $stmt,
?PhpParser\Node\Expr $assign_value,
Union $assignment_type,
Context $context
): ?bool {
$root_array_expr = $stmt;
$child_stmts = [];
while ($root_array_expr->var instanceof PhpParser\Node\Expr\ArrayDimFetch) {
$child_stmts[] = $root_array_expr;
$root_array_expr = $root_array_expr->var;
}
$child_stmts[] = $root_array_expr;
$root_array_expr = $root_array_expr->var;
if (ExpressionAnalyzer::analyze(
$statements_analyzer,
$root_array_expr,
$context,
true
) === false) {
// fall through
}
$codebase = $statements_analyzer->getCodebase();
$root_type = $statements_analyzer->node_data->getType($root_array_expr) ?? Type::getMixed();
if ($root_type->hasMixed()) {
if (ExpressionAnalyzer::analyze(
$statements_analyzer,
$stmt->var,
$context,
true
) === false) {
// fall through
}
if ($stmt->dim) {
if (ExpressionAnalyzer::analyze(
$statements_analyzer,
$stmt->dim,
$context
) === false) {
// fall through
}
}
}
$current_type = $root_type;
$current_dim = $stmt->dim;
// gets a variable id that *may* contain array keys
$root_var_id = ExpressionIdentifier::getExtendedVarId(
$root_array_expr,
$statements_analyzer->getFQCLN(),
$statements_analyzer
);
$parent_var_id = null;
$offset_already_existed = false;
self::analyzeNestedArrayAssignment(
$statements_analyzer,
$codebase,
$context,
$assign_value,
$assignment_type,
$child_stmts,
$root_var_id,
$parent_var_id,
$root_type,
$current_type,
$current_dim,
$offset_already_existed
);
$root_is_string = $root_type->isString();
$key_values = [];
if ($current_dim instanceof PhpParser\Node\Scalar\String_) {
$key_values[] = new TLiteralString($current_dim->value);
} elseif ($current_dim instanceof PhpParser\Node\Scalar\LNumber && !$root_is_string) {
$key_values[] = new TLiteralInt($current_dim->value);
} elseif ($current_dim
&& ($key_type = $statements_analyzer->node_data->getType($current_dim))
&& !$root_is_string
) {
$string_literals = $key_type->getLiteralStrings();
$int_literals = $key_type->getLiteralInts();
$all_atomic_types = $key_type->getAtomicTypes();
if (count($string_literals) + count($int_literals) === count($all_atomic_types)) {
foreach ($string_literals as $string_literal) {
$key_values[] = $string_literal;
}
foreach ($int_literals as $int_literal) {
$key_values[] = $int_literal;
}
}
}
if ($key_values) {
$new_child_type = self::updateTypeWithKeyValues(
$codebase,
$root_type,
$current_type,
$key_values
);
} elseif (!$root_is_string) {
$new_child_type = self::updateArrayAssignmentChildType(
$statements_analyzer,
$codebase,
$current_dim,
$context,
$current_type,
$root_type,
$offset_already_existed,
$parent_var_id
);
} else {
$new_child_type = $root_type;
}
$new_child_type = $new_child_type->getBuilder();
$new_child_type->removeType('null');
$new_child_type = $new_child_type->freeze();
if (!$root_type->hasObjectType()) {
$root_type = $new_child_type;
}
$statements_analyzer->node_data->setType($root_array_expr, $root_type);
if ($root_array_expr instanceof PhpParser\Node\Expr\PropertyFetch) {
if ($root_array_expr->name instanceof PhpParser\Node\Identifier) {
InstancePropertyAssignmentAnalyzer::analyze(
$statements_analyzer,
$root_array_expr,
$root_array_expr->name->name,
null,
$root_type,
$context,
false
);
} else {
if (ExpressionAnalyzer::analyze($statements_analyzer, $root_array_expr->name, $context) === false) {
return false;
}
if (ExpressionAnalyzer::analyze($statements_analyzer, $root_array_expr->var, $context) === false) {
return false;
}
}
} elseif ($root_array_expr instanceof PhpParser\Node\Expr\StaticPropertyFetch
&& $root_array_expr->name instanceof PhpParser\Node\Identifier
) {
if (StaticPropertyAssignmentAnalyzer::analyze(
$statements_analyzer,
$root_array_expr,
null,
$root_type,
$context
) === false) {
return false;
}
} elseif ($root_var_id) {
$context->vars_in_scope[$root_var_id] = $root_type;
}
if ($root_array_expr instanceof PhpParser\Node\Expr\MethodCall
|| $root_array_expr instanceof PhpParser\Node\Expr\StaticCall
|| $root_array_expr instanceof PhpParser\Node\Expr\FuncCall
) {
if ($root_type->hasArray()) {
if (IssueBuffer::accepts(
new InvalidArrayAssignment(
'Assigning to the output of a function has no effect',
new CodeLocation($statements_analyzer->getSource(), $root_array_expr)
),
$statements_analyzer->getSuppressedIssues()
)
) {
// do nothing
}
}
}
return null;
}
/**
* @param non-empty-list<TLiteralInt|TLiteralString> $key_values
*/
private static function updateTypeWithKeyValues(
Codebase $codebase,
Union $child_stmt_type,
Union $current_type,
array $key_values
): Union {
$has_matching_objectlike_property = false;
$has_matching_string = false;
$changed = false;
$types = [];
foreach ($child_stmt_type->getAtomicTypes() as $type) {
$old_type = $type;
if ($type instanceof TTemplateParam) {
$type = $type->replaceAs(self::updateTypeWithKeyValues(
$codebase,
$type->as,
$current_type,
$key_values
));
$has_matching_objectlike_property = true;
} elseif ($type instanceof TKeyedArray) {
$properties = $type->properties;
foreach ($key_values as $key_value) {
if (isset($properties[$key_value->value])) {
$has_matching_objectlike_property = true;
$properties[$key_value->value] = $current_type;
}
}
$type = $type->setProperties($properties);
} elseif ($type instanceof TString) {
foreach ($key_values as $key_value) {
if ($key_value instanceof TLiteralInt) {
$has_matching_string = true;
if ($type instanceof TLiteralString
&& $current_type->isSingleStringLiteral()
) {
$new_char = $current_type->getSingleStringLiteral()->value;
if (strlen($new_char) === 1 && $type->value[0] !== $new_char) {
$v = $type->value;
$v[0] = $new_char;
$changed = true;
$type = new TLiteralString($v);
break;
}
}
}
}
} elseif ($type instanceof TNonEmptyList
&& count($key_values) === 1
&& $key_values[0] instanceof TLiteralInt
) {
$key_value = $key_values[0];
$count = ($type->count ?? $type->min_count) ?? 1;
if ($key_value->value < $count) {
$has_matching_objectlike_property = true;
$changed = true;
$type = $type->setTypeParam(Type::combineUnionTypes(
$current_type,
$type->type_param,
$codebase,
true,
false
));
}
}
$types[$type->getKey()] = $type;
$changed = $changed || $old_type !== $type;
}
if ($changed) {
$child_stmt_type = $child_stmt_type->getBuilder()->setTypes($types)->freeze();
}
if (!$has_matching_objectlike_property && !$has_matching_string) {
if (count($key_values) === 1) {
$key_value = $key_values[0];
$object_like = new TKeyedArray(
[$key_value->value => $current_type],
$key_value instanceof TLiteralClassString
? [$key_value->value => true]
: null
);
$array_assignment_type = new Union([
$object_like,
]);
} else {
$array_assignment_literals = $key_values;
$array_assignment_type = new Union([
new TNonEmptyArray([
new Union($array_assignment_literals),
$current_type
])
]);
}
return Type::combineUnionTypes(
$child_stmt_type,
$array_assignment_type,
$codebase,
true,
false
);
}
return $child_stmt_type;
}
/**
* @param list<TLiteralInt|TLiteralString> $key_values $key_values
*/
private static function taintArrayAssignment(
StatementsAnalyzer $statements_analyzer,
PhpParser\Node\Expr\ArrayDimFetch $expr,
Union &$stmt_type,
Union $child_stmt_type,
?string $var_var_id,
array $key_values
): void {
if ($statements_analyzer->data_flow_graph
&& ($statements_analyzer->data_flow_graph instanceof VariableUseGraph
|| !in_array('TaintedInput', $statements_analyzer->getSuppressedIssues()))
) {
$var_location = new CodeLocation($statements_analyzer->getSource(), $expr->var);
$parent_node = DataFlowNode::getForAssignment(
$var_var_id ?: 'assignment',
$var_location
);
$statements_analyzer->data_flow_graph->addNode($parent_node);
$old_parent_nodes = $stmt_type->parent_nodes;
$stmt_type = $stmt_type->setParentNodes([$parent_node->id => $parent_node]);
foreach ($old_parent_nodes as $old_parent_node) {
$statements_analyzer->data_flow_graph->addPath(
$old_parent_node,
$parent_node,
'='
);
if ($stmt_type->by_ref) {
$statements_analyzer->data_flow_graph->addPath(
$parent_node,
$old_parent_node,
'='
);
}
}
foreach ($stmt_type->parent_nodes as $parent_node) {
foreach ($child_stmt_type->parent_nodes as $child_parent_node) {
if ($key_values) {
foreach ($key_values as $key_value) {
$statements_analyzer->data_flow_graph->addPath(
$child_parent_node,
$parent_node,
'arrayvalue-assignment-\'' . $key_value->value . '\''
);
}
} else {
$statements_analyzer->data_flow_graph->addPath(
$child_parent_node,
$parent_node,
'arrayvalue-assignment'
);
}
}
}
}
}
private static function updateArrayAssignmentChildType(
StatementsAnalyzer $statements_analyzer,
Codebase $codebase,
?PhpParser\Node\Expr $current_dim,
Context $context,
Union $value_type,
Union $root_type,
bool $offset_already_existed,
?string $parent_var_id
): Union {
$templated_assignment = false;
if ($current_dim) {
$key_type = $statements_analyzer->node_data->getType($current_dim);
if ($key_type) {
if ($key_type->hasMixed()) {
$key_type = Type::getArrayKey();
}
if ($key_type->isSingle()) {
$key_type_type = $key_type->getSingleAtomic();
if ($key_type_type instanceof TDependentListKey
&& $key_type_type->getVarId() === $parent_var_id
) {
$offset_already_existed = true;
}
if ($key_type_type instanceof TTemplateParam
&& $key_type_type->as->isSingle()
&& $root_type->isSingle()
&& $value_type->isSingle()
) {
$key_type_as_type = $key_type_type->as->getSingleAtomic();
$value_atomic_type = $value_type->getSingleAtomic();
$root_atomic_type = $root_type->getSingleAtomic();
if ($key_type_as_type instanceof TTemplateKeyOf
&& $root_atomic_type instanceof TTemplateParam
&& $value_atomic_type instanceof TTemplateIndexedAccess
&& $key_type_as_type->param_name === $root_atomic_type->param_name
&& $key_type_as_type->defining_class === $root_atomic_type->defining_class
&& $value_atomic_type->array_param_name === $root_atomic_type->param_name
&& $value_atomic_type->offset_param_name === $key_type_type->param_name
&& $value_atomic_type->defining_class === $root_atomic_type->defining_class
) {
$templated_assignment = true;
$offset_already_existed = true;
}
}
}
$array_atomic_key_type = ArrayFetchAnalyzer::replaceOffsetTypeWithInts($key_type);
} else {
$array_atomic_key_type = Type::getArrayKey();
}
if ($offset_already_existed
&& $parent_var_id
&& ($parent_type = $context->vars_in_scope[$parent_var_id] ?? null)
) {
if ($parent_type->hasList()) {
$array_atomic_type = new TNonEmptyList(
$value_type
);
} elseif ($parent_type->hasClassStringMap()
&& $key_type
&& $key_type->isTemplatedClassString()
) {
/**
* @var TClassStringMap
* @psalm-suppress PossiblyUndefinedStringArrayOffset
*/
$class_string_map = $parent_type->getAtomicTypes()['array'];
/**
* @var TTemplateParamClass
*/
$offset_type_part = $key_type->getSingleAtomic();
$template_result = new TemplateResult(
[],
[
$offset_type_part->param_name => [
$offset_type_part->defining_class => new Union([
new TTemplateParam(
$class_string_map->param_name,
$offset_type_part->as_type
? new Union([$offset_type_part->as_type])
: Type::getObject(),
'class-string-map'
)
])
]
]
);
$value_type = TemplateInferredTypeReplacer::replace(
$value_type,
$template_result,
$codebase
);
$array_atomic_type = new TClassStringMap(
$class_string_map->param_name,
$class_string_map->as_type,
$value_type
);
} else {
$array_atomic_type = new TNonEmptyArray([
$array_atomic_key_type,
$value_type,
]);
}
} else {
$array_atomic_type = new TNonEmptyArray([
$array_atomic_key_type,
$value_type,
]);
}
} else {
$array_atomic_type = new TNonEmptyList($value_type);
}
$from_countable_object_like = false;
$new_child_type = null;
if (!$current_dim && !$context->inside_loop) {
$atomic_root_types = $root_type->getAtomicTypes();
if (isset($atomic_root_types['array'])) {
if ($array_atomic_type instanceof TClassStringMap) {
$array_atomic_type = new TNonEmptyArray([
$array_atomic_type->getStandinKeyParam(),
$array_atomic_type->value_param
]);
} elseif ($atomic_root_types['array'] instanceof TNonEmptyArray
|| $atomic_root_types['array'] instanceof TNonEmptyList
) {
/** @psalm-suppress InaccessibleProperty We just created this object */
$array_atomic_type->count = $atomic_root_types['array']->count;
} elseif ($atomic_root_types['array'] instanceof TKeyedArray
&& $atomic_root_types['array']->fallback_value_type === null
) {
/** @psalm-suppress InaccessibleProperty We just created this object */
$array_atomic_type->count = count($atomic_root_types['array']->properties);
$from_countable_object_like = true;
if ($atomic_root_types['array']->is_list
&& $array_atomic_type instanceof TList
) {
$array_atomic_type = $atomic_root_types['array'];
$new_child_type = new Union([$array_atomic_type], [
'parent_nodes' => $root_type->parent_nodes
]);
}
} elseif ($array_atomic_type instanceof TList) {
$array_atomic_type = new TNonEmptyList(
$array_atomic_type->type_param
);
} else {
$array_atomic_type = new TNonEmptyArray(
$array_atomic_type->type_params
);
}
}
}
$array_assignment_type = new Union([
$array_atomic_type,
]);
if (!$new_child_type) {
if ($templated_assignment) {
$new_child_type = $root_type;
} else {
$new_child_type = Type::combineUnionTypes(
$root_type,
$array_assignment_type,
$codebase,
true,
true
);
}
}
if ($from_countable_object_like) {
$atomic_root_types = $new_child_type->getAtomicTypes();
if (isset($atomic_root_types['array'])
&& ($atomic_root_types['array'] instanceof TNonEmptyArray
|| $atomic_root_types['array'] instanceof TNonEmptyList)
&& $atomic_root_types['array']->count !== null
) {
$atomic_root_types['array'] =
$atomic_root_types['array']->setCount($atomic_root_types['array']->count+1);
$new_child_type = new Union($atomic_root_types);
}
}
return $new_child_type;
}
/**
* @param non-empty-list<PhpParser\Node\Expr\ArrayDimFetch> $child_stmts
* @param-out PhpParser\Node\Expr $child_stmt
*/
private static function analyzeNestedArrayAssignment(
StatementsAnalyzer $statements_analyzer,
Codebase $codebase,
Context $context,
?PhpParser\Node\Expr $assign_value,
Union $assignment_type,
array $child_stmts,
?string $root_var_id,
?string &$parent_var_id,
Union &$root_type,
Union &$current_type,
?PhpParser\Node\Expr &$current_dim,
bool &$offset_already_existed
): void {
$var_id_additions = [];
$root_var = end($child_stmts)->var;
// First go from the root element up, and go as far as we can to figure out what
// array types there are
foreach (array_reverse($child_stmts) as $i => $child_stmt) {
$child_stmt_dim_type = null;
$offset_type = null;
if ($child_stmt->dim) {
$was_inside_general_use = $context->inside_general_use;
$context->inside_general_use = true;
if (ExpressionAnalyzer::analyze(
$statements_analyzer,
$child_stmt->dim,
$context
) === false) {
$context->inside_general_use = $was_inside_general_use;
return;
}
$context->inside_general_use = $was_inside_general_use;
if (!($child_stmt_dim_type = $statements_analyzer->node_data->getType($child_stmt->dim))) {
return;
}
[$offset_type, $var_id_addition, $full_var_id] = self::getArrayAssignmentOffsetType(
$statements_analyzer,
$child_stmt,
$child_stmt_dim_type
);
$var_id_additions[] = $var_id_addition;
} else {
$var_id_additions[] = '';
$full_var_id = false;
}
if (!($array_type = $statements_analyzer->node_data->getType($child_stmt->var))) {
return;
}
if ($array_type->isNever()) {
$array_type = Type::getEmptyArray();
$statements_analyzer->node_data->setType($child_stmt->var, $array_type);
}
$extended_var_id = $root_var_id . implode('', $var_id_additions);
if ($parent_var_id && isset($context->vars_in_scope[$parent_var_id])) {
$array_type = $context->vars_in_scope[$parent_var_id];
$statements_analyzer->node_data->setType($child_stmt->var, $array_type);
}
$is_last = $i === count($child_stmts) - 1;
$child_stmt_dim_type_or_int = $child_stmt_dim_type ?? Type::getInt();
$child_stmt_type = ArrayFetchAnalyzer::getArrayAccessTypeGivenOffset(
$statements_analyzer,
$child_stmt,
$array_type,
$child_stmt_dim_type_or_int,
true,
$extended_var_id,
$context,
$assign_value,
!$is_last ? null : $assignment_type
);
if ($child_stmt->dim) {
$statements_analyzer->node_data->setType(
$child_stmt->dim,
$child_stmt_dim_type_or_int
);
}
$statements_analyzer->node_data->setType(
$child_stmt,
$child_stmt_type
);
if ($is_last) {
// we need this slight hack as the type we're putting it has to be
// different from the type we're getting out
if ($array_type->isSingle() && $array_type->hasClassStringMap()) {
$assignment_type = $child_stmt_type;
}
$child_stmt_type = $assignment_type;
$statements_analyzer->node_data->setType($child_stmt, $assignment_type);
if ($statements_analyzer->data_flow_graph) {
self::taintArrayAssignment(
$statements_analyzer,
$child_stmt,
$array_type,
$assignment_type,
ExpressionIdentifier::getExtendedVarId(
$child_stmt->var,
$statements_analyzer->getFQCLN(),
$statements_analyzer
),
$offset_type !== null ? [$offset_type] : []
);
}
}
$statements_analyzer->node_data->setType($child_stmt->var, $array_type);
if ($root_var_id) {
if (!$parent_var_id) {
$rooted_parent_id = $root_var_id;
$root_type = $array_type;
} else {
$rooted_parent_id = $parent_var_id;
}
$context->vars_in_scope[$rooted_parent_id] = $array_type;
$context->possibly_assigned_var_ids[$rooted_parent_id] = true;
}
$current_type = $child_stmt_type;
$current_dim = $child_stmt->dim;
$parent_var_id = $extended_var_id;
}
if ($statements_analyzer->data_flow_graph instanceof VariableUseGraph
&& $root_var_id !== null
&& isset($context->references_to_external_scope[$root_var_id])
&& $root_var instanceof Variable && is_string($root_var->name)
&& $root_var_id === '$' . $root_var->name
) {
// Array is a reference to an external scope, mark it as used
$statements_analyzer->data_flow_graph->addPath(
DataFlowNode::getForAssignment(
$root_var_id,
new CodeLocation($statements_analyzer->getSource(), $root_var)
),
new DataFlowNode('variable-use', 'variable use', null),
'variable-use'
);
}
if ($root_var_id
&& $full_var_id
&& ($child_stmt_var_type = $statements_analyzer->node_data->getType($child_stmt->var))
&& !$child_stmt_var_type->hasObjectType()
) {
$extended_var_id = $root_var_id . implode('', $var_id_additions);
$parent_var_id = $root_var_id . implode('', array_slice($var_id_additions, 0, -1));
if (isset($context->vars_in_scope[$extended_var_id])
&& !$context->vars_in_scope[$extended_var_id]->possibly_undefined
) {
$offset_already_existed = true;
}
$context->vars_in_scope[$extended_var_id] = $assignment_type;
$context->possibly_assigned_var_ids[$extended_var_id] = true;
}
array_shift($child_stmts);
// only update as many child stmts are we were able to process above
foreach ($child_stmts as $child_stmt) {
$child_stmt_type = $statements_analyzer->node_data->getType($child_stmt);
if (!$child_stmt_type) {
throw new InvalidArgumentException('Should never get here');
}
$key_values = $current_dim ? self::getDimKeyValues($statements_analyzer, $current_dim) : [];
if ($key_values) {
$new_child_type = self::updateTypeWithKeyValues(
$codebase,
$child_stmt_type,
$current_type,
$key_values
);
} else {
if (!$current_dim) {
$array_assignment_type = new Union([
new TList($current_type),
]);
} else {
$key_type = $statements_analyzer->node_data->getType($current_dim);
$array_assignment_type = new Union([
new TArray([
$key_type && !$key_type->hasMixed()
? $key_type
: Type::getArrayKey(),
$current_type,
]),
]);
}
$new_child_type = Type::combineUnionTypes(
$child_stmt_type,
$array_assignment_type,
$codebase,
true,
true
);
}
if ($new_child_type->hasNull() || $new_child_type->possibly_undefined) {
$new_child_type = $new_child_type->getBuilder();
$new_child_type->removeType('null');
$new_child_type->possibly_undefined = false;
$new_child_type = $new_child_type->freeze();
}
if (!$child_stmt_type->hasObjectType()) {
$child_stmt_type = $new_child_type;
$statements_analyzer->node_data->setType($child_stmt, $new_child_type);
}
$current_type = $child_stmt_type;
$current_dim = $child_stmt->dim;
array_pop($var_id_additions);
$parent_array_var_id = null;
if ($root_var_id) {
$extended_var_id = $root_var_id . implode('', $var_id_additions);
$parent_array_var_id = $root_var_id . implode('', array_slice($var_id_additions, 0, -1));
$context->vars_in_scope[$extended_var_id] = $child_stmt_type;
$context->possibly_assigned_var_ids[$extended_var_id] = true;
}
if ($statements_analyzer->data_flow_graph) {
$t_orig = $statements_analyzer->node_data->getType($child_stmt->var);
$array_type = $t_orig ?? Type::getMixed();
self::taintArrayAssignment(
$statements_analyzer,
$child_stmt,
$array_type,
$new_child_type,
$parent_array_var_id,
$child_stmt->dim ? self::getDimKeyValues($statements_analyzer, $child_stmt->dim) : [],
);
if ($t_orig) {
$statements_analyzer->node_data->setType($child_stmt->var, $array_type);
}
if ($root_var_id) {
if ($parent_array_var_id === $root_var_id) {
$rooted_parent_id = $root_var_id;
$root_type = $array_type;
} else {
assert($parent_array_var_id !== null);
$rooted_parent_id = $parent_array_var_id;
}
$context->vars_in_scope[$rooted_parent_id] = $array_type;
}
}
}
}
/**
* @return list<TLiteralInt|TLiteralString>
*/
private static function getDimKeyValues(
StatementsAnalyzer $statements_analyzer,
PhpParser\Node\Expr $dim
): array {
$key_values = [];
if ($dim instanceof PhpParser\Node\Scalar\String_) {
$key_values[] = new TLiteralString($dim->value);
} elseif ($dim instanceof PhpParser\Node\Scalar\LNumber) {
$key_values[] = new TLiteralInt($dim->value);
} else {
$key_type = $statements_analyzer->node_data->getType($dim);
if ($key_type) {
$string_literals = $key_type->getLiteralStrings();
$int_literals = $key_type->getLiteralInts();
$all_atomic_types = $key_type->getAtomicTypes();
if (count($string_literals) + count($int_literals) === count($all_atomic_types)) {
foreach ($string_literals as $string_literal) {
$key_values[] = $string_literal;
}
foreach ($int_literals as $int_literal) {
$key_values[] = $int_literal;
}
}
}
}
return $key_values;
}
/**
* @return strict-array{TLiteralInt|TLiteralString|null, string, bool}
*/