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737 lines
23 KiB
PHP
737 lines
23 KiB
PHP
<?php
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namespace Psalm;
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use LogicException;
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use Psalm\Internal\Type\Comparator\AtomicTypeComparator;
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use Psalm\Internal\Type\Comparator\UnionTypeComparator;
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use Psalm\Internal\Type\TypeCombiner;
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use Psalm\Internal\Type\TypeParser;
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use Psalm\Internal\Type\TypeTokenizer;
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use Psalm\Plugin\EventHandler\Event\StringInterpreterEvent;
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use Psalm\Type\Atomic;
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use Psalm\Type\Atomic\TArray;
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use Psalm\Type\Atomic\TArrayKey;
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use Psalm\Type\Atomic\TBool;
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use Psalm\Type\Atomic\TClassString;
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use Psalm\Type\Atomic\TEmpty;
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use Psalm\Type\Atomic\TFalse;
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use Psalm\Type\Atomic\TFloat;
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use Psalm\Type\Atomic\TInt;
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use Psalm\Type\Atomic\TIterable;
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use Psalm\Type\Atomic\TList;
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use Psalm\Type\Atomic\TLiteralClassString;
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use Psalm\Type\Atomic\TLiteralFloat;
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use Psalm\Type\Atomic\TLiteralInt;
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use Psalm\Type\Atomic\TLiteralString;
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use Psalm\Type\Atomic\TLowercaseString;
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use Psalm\Type\Atomic\TMixed;
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use Psalm\Type\Atomic\TNamedObject;
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use Psalm\Type\Atomic\TNever;
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use Psalm\Type\Atomic\TNonEmptyLowercaseString;
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use Psalm\Type\Atomic\TNonEmptyString;
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use Psalm\Type\Atomic\TNull;
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use Psalm\Type\Atomic\TNumeric;
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use Psalm\Type\Atomic\TNumericString;
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use Psalm\Type\Atomic\TObject;
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use Psalm\Type\Atomic\TObjectWithProperties;
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use Psalm\Type\Atomic\TResource;
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use Psalm\Type\Atomic\TScalar;
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use Psalm\Type\Atomic\TSingleLetter;
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use Psalm\Type\Atomic\TString;
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use Psalm\Type\Atomic\TTemplateParam;
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use Psalm\Type\Atomic\TTrue;
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use Psalm\Type\Atomic\TVoid;
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use Psalm\Type\Union;
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use function array_merge;
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use function array_pop;
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use function array_shift;
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use function array_values;
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use function explode;
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use function get_class;
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use function implode;
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use function preg_quote;
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use function preg_replace;
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use function stripos;
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use function strlen;
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use function strpos;
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use function strtolower;
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use function substr;
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abstract class Type
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{
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/**
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* Parses a string type representation
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*
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* @param array{int,int}|null $php_version
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* @param array<string, array<string, Type\Union>> $template_type_map
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*/
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public static function parseString(
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string $type_string,
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?array $php_version = null,
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array $template_type_map = []
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): Union {
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return TypeParser::parseTokens(
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TypeTokenizer::tokenize(
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$type_string
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),
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$php_version,
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$template_type_map
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);
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}
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public static function getFQCLNFromString(
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string $class,
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Aliases $aliases
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) : string {
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if ($class === '') {
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throw new \InvalidArgumentException('$class cannot be empty');
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}
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if ($class[0] === '\\') {
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return substr($class, 1);
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}
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$imported_namespaces = $aliases->uses;
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if (strpos($class, '\\') !== false) {
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$class_parts = explode('\\', $class);
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$first_namespace = array_shift($class_parts);
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if (isset($imported_namespaces[strtolower($first_namespace)])) {
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return $imported_namespaces[strtolower($first_namespace)] . '\\' . implode('\\', $class_parts);
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}
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} elseif (isset($imported_namespaces[strtolower($class)])) {
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return $imported_namespaces[strtolower($class)];
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}
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$namespace = $aliases->namespace;
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return ($namespace ? $namespace . '\\' : '') . $class;
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}
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/**
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* @param array<lowercase-string, string> $aliased_classes
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*
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* @psalm-pure
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*/
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public static function getStringFromFQCLN(
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string $value,
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?string $namespace,
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array $aliased_classes,
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?string $this_class,
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bool $allow_self = false,
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bool $was_static = false
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) : string {
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if ($allow_self && $value === $this_class) {
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if ($was_static) {
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return 'static';
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}
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return 'self';
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}
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if (isset($aliased_classes[strtolower($value)])) {
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return $aliased_classes[strtolower($value)];
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}
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if ($namespace && stripos($value, $namespace . '\\') === 0) {
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$candidate = preg_replace(
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'/^' . preg_quote($namespace . '\\') . '/i',
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'',
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$value
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);
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$candidate_parts = explode('\\', $candidate);
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if (!isset($aliased_classes[strtolower($candidate_parts[0])])) {
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return $candidate;
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}
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} elseif (!$namespace && strpos($value, '\\') === false) {
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return $value;
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}
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if (strpos($value, '\\')) {
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$parts = explode('\\', $value);
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$suffix = array_pop($parts);
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while ($parts) {
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$left = implode('\\', $parts);
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if (isset($aliased_classes[strtolower($left)])) {
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return $aliased_classes[strtolower($left)] . '\\' . $suffix;
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}
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$suffix = array_pop($parts) . '\\' . $suffix;
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}
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}
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return '\\' . $value;
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}
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public static function getInt(bool $from_calculation = false, ?int $value = null): Union
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{
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if ($value !== null) {
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$union = new Union([new TLiteralInt($value)]);
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} else {
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$union = new Union([new TInt()]);
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}
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$union->from_calculation = $from_calculation;
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return $union;
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}
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public static function getLowercaseString(): Union
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{
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$type = new TLowercaseString();
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return new Union([$type]);
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}
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public static function getPositiveInt(bool $from_calculation = false): Union
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{
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$union = new Union([new Type\Atomic\TPositiveInt()]);
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$union->from_calculation = $from_calculation;
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return $union;
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}
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public static function getNonEmptyLowercaseString(): Union
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{
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$type = new TNonEmptyLowercaseString();
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return new Union([$type]);
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}
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public static function getNonEmptyString(): Union
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{
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$type = new TNonEmptyString();
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return new Union([$type]);
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}
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public static function getNumeric(): Union
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{
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$type = new TNumeric;
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return new Union([$type]);
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}
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public static function getNumericString(): Union
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{
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$type = new TNumericString;
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return new Union([$type]);
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}
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public static function getString(?string $value = null): Union
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{
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$type = null;
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if ($value !== null) {
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$config = \Psalm\Config::getInstance();
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$event = new StringInterpreterEvent($value);
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$type = $config->eventDispatcher->dispatchStringInterpreter($event);
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if (!$type) {
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if (strlen($value) < $config->max_string_length) {
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$type = new TLiteralString($value);
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} else {
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$type = new Type\Atomic\TNonEmptyString();
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}
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}
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}
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if (!$type) {
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$type = new TString();
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}
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return new Union([$type]);
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}
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public static function getSingleLetter(): Union
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{
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$type = new TSingleLetter;
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return new Union([$type]);
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}
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public static function getClassString(string $extends = 'object'): Union
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{
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return new Union([
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new TClassString(
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$extends,
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$extends === 'object'
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? null
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: new TNamedObject($extends)
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),
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]);
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}
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public static function getLiteralClassString(string $class_type, bool $definite_class = false): Union
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{
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$type = new TLiteralClassString($class_type, $definite_class);
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return new Union([$type]);
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}
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public static function getNull(): Union
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{
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$type = new TNull;
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return new Union([$type]);
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}
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public static function getMixed(bool $from_loop_isset = false): Union
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{
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$type = new TMixed($from_loop_isset);
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return new Union([$type]);
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}
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public static function getScalar(): Union
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{
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$type = new TScalar();
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return new Union([$type]);
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}
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public static function getEmpty(): Union
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{
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$type = new TEmpty();
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return new Union([$type]);
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}
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public static function getNever(): Union
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{
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$type = new TNever();
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return new Union([$type]);
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}
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public static function getBool(): Union
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{
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$type = new TBool;
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return new Union([$type]);
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}
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public static function getFloat(?float $value = null): Union
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{
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if ($value !== null) {
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$type = new TLiteralFloat($value);
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} else {
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$type = new TFloat();
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}
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return new Union([$type]);
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}
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public static function getObject(): Union
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{
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$type = new TObject;
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return new Union([$type]);
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}
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public static function getClosure(): Union
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{
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$type = new Type\Atomic\TClosure('Closure');
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return new Union([$type]);
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}
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public static function getArrayKey(): Union
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{
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$type = new TArrayKey();
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return new Union([$type]);
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}
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public static function getArray(): Union
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{
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$type = new TArray(
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[
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new Type\Union([new TArrayKey]),
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new Type\Union([new TMixed]),
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]
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);
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return new Union([$type]);
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}
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public static function getEmptyArray(): Union
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{
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$array_type = new TArray(
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[
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new Type\Union([new TEmpty]),
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new Type\Union([new TEmpty]),
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]
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);
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return new Type\Union([
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$array_type,
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]);
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}
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public static function getList(): Union
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{
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$type = new TList(new Type\Union([new TMixed]));
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return new Union([$type]);
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}
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public static function getNonEmptyList(): Union
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{
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$type = new Type\Atomic\TNonEmptyList(new Type\Union([new TMixed]));
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return new Union([$type]);
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}
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public static function getVoid(): Union
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{
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$type = new TVoid;
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return new Union([$type]);
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}
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public static function getFalse(): Union
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{
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$type = new TFalse;
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return new Union([$type]);
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}
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public static function getTrue(): Union
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{
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$type = new TTrue;
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return new Union([$type]);
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}
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public static function getResource(): Union
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{
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return new Union([new TResource]);
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}
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/**
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* @param non-empty-list<Type\Union> $union_types
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*/
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public static function combineUnionTypeArray(array $union_types, ?Codebase $codebase) : Type\Union
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{
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$first_type = array_pop($union_types);
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foreach ($union_types as $type) {
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$first_type = self::combineUnionTypes($first_type, $type, $codebase);
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}
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return $first_type;
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}
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/**
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* Combines two union types into one
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*
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* @param int $literal_limit any greater number of literal types than this
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* will be merged to a scalar
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*
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*/
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public static function combineUnionTypes(
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Union $type_1,
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Union $type_2,
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?Codebase $codebase = null,
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bool $overwrite_empty_array = false,
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bool $allow_mixed_union = true,
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int $literal_limit = 500
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): Union {
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if ($type_1 === $type_2) {
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return $type_1;
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}
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if ($type_1->isVanillaMixed() && $type_2->isVanillaMixed()) {
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$combined_type = Type::getMixed();
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} else {
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$both_failed_reconciliation = false;
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if ($type_1->failed_reconciliation) {
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if ($type_2->failed_reconciliation) {
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$both_failed_reconciliation = true;
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} else {
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$type_2 = clone $type_2;
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$type_2->parent_nodes += $type_1->parent_nodes;
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return $type_2;
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}
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} elseif ($type_2->failed_reconciliation) {
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$type_1 = clone $type_1;
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$type_1->parent_nodes += $type_2->parent_nodes;
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return $type_1;
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}
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$combined_type = TypeCombiner::combine(
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array_merge(
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array_values($type_1->getAtomicTypes()),
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array_values($type_2->getAtomicTypes())
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),
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$codebase,
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$overwrite_empty_array,
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$allow_mixed_union,
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$literal_limit
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);
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if (!$type_1->initialized || !$type_2->initialized) {
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$combined_type->initialized = false;
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}
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if ($type_1->from_docblock || $type_2->from_docblock) {
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$combined_type->from_docblock = true;
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}
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if ($type_1->from_calculation || $type_2->from_calculation) {
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$combined_type->from_calculation = true;
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}
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if ($type_1->ignore_nullable_issues || $type_2->ignore_nullable_issues) {
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$combined_type->ignore_nullable_issues = true;
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}
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if ($type_1->ignore_falsable_issues || $type_2->ignore_falsable_issues) {
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$combined_type->ignore_falsable_issues = true;
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}
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if ($type_1->had_template && $type_2->had_template) {
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$combined_type->had_template = true;
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}
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if ($type_1->reference_free && $type_2->reference_free) {
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$combined_type->reference_free = true;
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}
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if ($both_failed_reconciliation) {
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$combined_type->failed_reconciliation = true;
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}
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}
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if ($type_1->possibly_undefined || $type_2->possibly_undefined) {
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$combined_type->possibly_undefined = true;
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}
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if ($type_1->possibly_undefined_from_try || $type_2->possibly_undefined_from_try) {
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$combined_type->possibly_undefined_from_try = true;
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}
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if ($type_1->parent_nodes || $type_2->parent_nodes) {
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$combined_type->parent_nodes = $type_1->parent_nodes + $type_2->parent_nodes;
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}
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if ($type_1->by_ref || $type_2->by_ref) {
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$combined_type->by_ref = true;
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}
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return $combined_type;
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}
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/**
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* Combines two union types into one via an intersection
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*
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*
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*/
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public static function intersectUnionTypes(
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Union $type_1,
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Union $type_2,
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Codebase $codebase
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): ?Union {
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$intersection_performed = false;
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if ($type_1->isMixed() && $type_2->isMixed()) {
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$combined_type = Type::getMixed();
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} else {
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$both_failed_reconciliation = false;
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if ($type_1->failed_reconciliation) {
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if ($type_2->failed_reconciliation) {
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$both_failed_reconciliation = true;
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} else {
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return $type_2;
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}
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} elseif ($type_2->failed_reconciliation) {
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return $type_1;
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}
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if ($type_1->isMixed() && !$type_2->isMixed()) {
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$combined_type = clone $type_2;
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$intersection_performed = true;
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} elseif (!$type_1->isMixed() && $type_2->isMixed()) {
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$combined_type = clone $type_1;
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$intersection_performed = true;
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} else {
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$combined_type = null;
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foreach ($type_1->getAtomicTypes() as $type_1_atomic) {
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foreach ($type_2->getAtomicTypes() as $type_2_atomic) {
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$intersection_atomic = null;
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$wider_type = null;
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if ($type_1_atomic instanceof TNamedObject
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&& $type_2_atomic instanceof TNamedObject
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) {
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if (($type_1_atomic->value === $type_2_atomic->value
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&& get_class($type_1_atomic) === TNamedObject::class
|
|
&& get_class($type_2_atomic) !== TNamedObject::class)
|
|
) {
|
|
$intersection_atomic = clone $type_2_atomic;
|
|
$wider_type = $type_1_atomic;
|
|
$intersection_performed = true;
|
|
} elseif (($type_1_atomic->value === $type_2_atomic->value
|
|
&& get_class($type_2_atomic) === TNamedObject::class
|
|
&& get_class($type_1_atomic) !== TNamedObject::class)
|
|
) {
|
|
$intersection_atomic = clone $type_1_atomic;
|
|
$wider_type = $type_2_atomic;
|
|
$intersection_performed = true;
|
|
}
|
|
}
|
|
|
|
if (null === $intersection_atomic) {
|
|
if (AtomicTypeComparator::isContainedBy(
|
|
$codebase,
|
|
$type_2_atomic,
|
|
$type_1_atomic
|
|
)) {
|
|
$intersection_atomic = clone $type_2_atomic;
|
|
$wider_type = $type_1_atomic;
|
|
$intersection_performed = true;
|
|
} elseif (AtomicTypeComparator::isContainedBy(
|
|
$codebase,
|
|
$type_1_atomic,
|
|
$type_2_atomic
|
|
)) {
|
|
$intersection_atomic = clone $type_1_atomic;
|
|
$wider_type = $type_2_atomic;
|
|
$intersection_performed = true;
|
|
}
|
|
}
|
|
|
|
if (static::mayHaveIntersection($type_1_atomic)
|
|
&& static::mayHaveIntersection($type_2_atomic)
|
|
) {
|
|
if ($intersection_atomic === null && $wider_type === null) {
|
|
$intersection_atomic = clone $type_1_atomic;
|
|
$wider_type = $type_2_atomic;
|
|
}
|
|
if ($intersection_atomic === null || $wider_type === null) {
|
|
throw new LogicException(
|
|
'$intersection_atomic and $wider_type should be both set or null.'
|
|
.' Check the preceding code for errors.'
|
|
.' Did you forget to assign one of the variables?'
|
|
);
|
|
}
|
|
if (!static::mayHaveIntersection($intersection_atomic)
|
|
|| !static::mayHaveIntersection($wider_type)
|
|
) {
|
|
throw new LogicException(
|
|
'$intersection_atomic and $wider_type should be both support intersection.'
|
|
.' Check the preceding code for errors.'
|
|
);
|
|
}
|
|
if (!$intersection_atomic->extra_types) {
|
|
$intersection_atomic->extra_types = [];
|
|
}
|
|
|
|
$intersection_performed = true;
|
|
|
|
$wider_type_clone = clone $wider_type;
|
|
|
|
$wider_type_clone->extra_types = [];
|
|
|
|
$intersection_atomic->extra_types[$wider_type_clone->getKey()] = $wider_type_clone;
|
|
|
|
$wider_type_intersection_types = $wider_type->getIntersectionTypes();
|
|
|
|
if ($wider_type_intersection_types !== null) {
|
|
foreach ($wider_type_intersection_types as $wider_type_intersection_type) {
|
|
$intersection_atomic->extra_types[$wider_type_intersection_type->getKey()]
|
|
= clone $wider_type_intersection_type;
|
|
}
|
|
}
|
|
}
|
|
if (null !== $intersection_atomic) {
|
|
if (null === $combined_type) {
|
|
$combined_type = new Union([$intersection_atomic]);
|
|
} else {
|
|
$combined_type->addType($intersection_atomic);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//if a type is contained by the other, the intersection is the narrowest type
|
|
if (!$intersection_performed) {
|
|
$type_1_in_2 = UnionTypeComparator::isContainedBy($codebase, $type_1, $type_2);
|
|
$type_2_in_1 = UnionTypeComparator::isContainedBy($codebase, $type_2, $type_1);
|
|
if ($type_1_in_2) {
|
|
$intersection_performed = true;
|
|
$combined_type = $type_1;
|
|
} elseif ($type_2_in_1) {
|
|
$intersection_performed = true;
|
|
$combined_type = $type_2;
|
|
}
|
|
}
|
|
|
|
if ($combined_type !== null) {
|
|
if (!$type_1->initialized && !$type_2->initialized) {
|
|
$combined_type->initialized = false;
|
|
}
|
|
|
|
if ($type_1->possibly_undefined_from_try && $type_2->possibly_undefined_from_try) {
|
|
$combined_type->possibly_undefined_from_try = true;
|
|
}
|
|
|
|
if ($type_1->from_docblock && $type_2->from_docblock) {
|
|
$combined_type->from_docblock = true;
|
|
}
|
|
|
|
if ($type_1->from_calculation && $type_2->from_calculation) {
|
|
$combined_type->from_calculation = true;
|
|
}
|
|
|
|
if ($type_1->ignore_nullable_issues && $type_2->ignore_nullable_issues) {
|
|
$combined_type->ignore_nullable_issues = true;
|
|
}
|
|
|
|
if ($type_1->ignore_falsable_issues && $type_2->ignore_falsable_issues) {
|
|
$combined_type->ignore_falsable_issues = true;
|
|
}
|
|
|
|
if ($both_failed_reconciliation) {
|
|
$combined_type->failed_reconciliation = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!$intersection_performed && $type_1->getId() !== $type_2->getId()) {
|
|
return null;
|
|
}
|
|
|
|
if ($type_1->possibly_undefined && $type_2->possibly_undefined && $combined_type !== null) {
|
|
$combined_type->possibly_undefined = true;
|
|
}
|
|
|
|
return $combined_type;
|
|
}
|
|
|
|
/**
|
|
* @psalm-assert-if-true TIterable|TNamedObject|TTemplateParam|TObjectWithProperties $type
|
|
*/
|
|
private static function mayHaveIntersection(Atomic $type): bool
|
|
{
|
|
return $type instanceof TIterable
|
|
|| $type instanceof TNamedObject
|
|
|| $type instanceof TTemplateParam
|
|
|| $type instanceof TObjectWithProperties;
|
|
}
|
|
}
|