mirror of
https://github.com/danog/psalm.git
synced 2024-12-14 18:36:58 +01:00
770 lines
24 KiB
PHP
770 lines
24 KiB
PHP
<?php
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namespace Psalm\Checker;
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use PhpParser;
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use Psalm\CodeLocation;
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use Psalm\Config;
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use Psalm\Exception\DocblockParseException;
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use Psalm\Issue\DeprecatedMethod;
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use Psalm\Issue\InaccessibleMethod;
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use Psalm\Issue\InvalidDocblock;
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use Psalm\Issue\InvalidStaticInvocation;
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use Psalm\Issue\UndefinedMethod;
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use Psalm\IssueBuffer;
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use Psalm\StatementsSource;
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use Psalm\Type;
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class MethodChecker extends FunctionLikeChecker
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{
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const VISIBILITY_PUBLIC = 1;
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const VISIBILITY_PROTECTED = 2;
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const VISIBILITY_PRIVATE = 3;
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/**
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* @var array<string,string>
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*/
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protected static $method_files = [];
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/**
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* @var array<string,array<int, \Psalm\FunctionLikeParameter>>
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*/
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protected static $method_params = [];
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/**
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* @var array<string,string>
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*/
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protected static $method_namespaces = [];
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/**
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* @var array<string, Type\Union|null>
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*/
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protected static $method_return_types = [];
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/**
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* @var array<string, CodeLocation|null>
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*/
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protected static $method_return_type_locations = [];
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/**
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* @var array<string, string>
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*/
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protected static $cased_method_ids = [];
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/**
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* @var array<string, bool>
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*/
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protected static $static_methods = [];
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/**
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* @var array<string, string>
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*/
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protected static $declaring_methods = [];
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/**
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* @var array<string, array<string>>
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*/
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protected static $overridden_methods = [];
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/**
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* @var array<string, bool>
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*/
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protected static $have_reflected = [];
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/**
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* @var array<string, bool>
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*/
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protected static $have_registered = [];
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/**
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* @var array<string, string>
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*/
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protected static $method_visibility = [];
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/**
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* @var array<string, array<int, string>>
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*/
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protected static $method_suppress = [];
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/**
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* @var array<string, bool>
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*/
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protected static $deprecated_methods = [];
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/**
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* A dictionary of variadic methods
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*
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* @var array<string, bool>
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*/
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protected static $variadic_methods = [];
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/**
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* @param PhpParser\Node\FunctionLike $function
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* @param StatementsSource $source
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* @param array $this_vars
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* @psalm-suppress MixedAssignment
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*/
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public function __construct($function, StatementsSource $source, array $this_vars = [])
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{
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if (!$function instanceof PhpParser\Node\Stmt\ClassMethod) {
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throw new \InvalidArgumentException('Must be called with a ClassMethod');
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}
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parent::__construct($function, $source);
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$this->registerMethod($function);
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$this->is_static = $function->isStatic();
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}
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/**
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* @param string $method_id
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* @return array<int, \Psalm\FunctionLikeParameter>|null
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*/
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public static function getMethodParams($method_id)
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{
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self::registerClassMethod($method_id);
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if ($method_id = self::getDeclaringMethodId($method_id)) {
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return self::$method_params[$method_id];
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}
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}
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/**
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* @param string $method_id
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* @return boolean
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*/
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public static function isVariadic($method_id)
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{
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self::registerClassMethod($method_id);
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$method_id = self::getDeclaringMethodId($method_id);
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return isset(self::$variadic_methods[$method_id]);
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}
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/**
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* @param string $method_id
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* @return Type\Union|null
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*/
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public static function getMethodReturnType($method_id)
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{
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self::registerClassMethod($method_id);
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/** @var string */
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$method_id = self::getDeclaringMethodId($method_id);
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$method_class = explode('::', $method_id)[0];
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if (!ClassLikeChecker::isUserDefined($method_class) && FunctionChecker::inCallMap($method_id)) {
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return FunctionChecker::getReturnTypeFromCallMap($method_id);
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}
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if (self::$method_return_types[$method_id]) {
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return clone self::$method_return_types[$method_id];
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}
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$overridden_method_ids = self::getOverriddenMethodIds($method_id);
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foreach ($overridden_method_ids as $overridden_method_id) {
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if (isset(self::$method_return_types[$overridden_method_id])) {
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$implementary_return_type = self::$method_return_types[$overridden_method_id];
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if ($implementary_return_type && $implementary_return_type->isNull()) {
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return Type::getVoid();
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}
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return $implementary_return_type;
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}
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}
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return null;
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}
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/**
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* @param string $method_id
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* @param CodeLocation|null $defined_location
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* @return CodeLocation|null
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*/
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public static function getMethodReturnTypeLocation($method_id, CodeLocation &$defined_location = null)
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{
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self::registerClassMethod($method_id);
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/** @var string */
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$method_id = self::getDeclaringMethodId($method_id);
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if (!self::$method_return_type_locations[$method_id]) {
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$overridden_method_ids = self::getOverriddenMethodIds($method_id);
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foreach ($overridden_method_ids as $overridden_method_id) {
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if (isset(self::$method_return_type_locations[$overridden_method_id])) {
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$defined_location = self::$method_return_type_locations[$overridden_method_id];
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break;
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}
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}
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}
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return self::$method_return_type_locations[$method_id];
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}
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/**
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* @param \ReflectionMethod $method
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* @return null
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*/
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public static function extractReflectionMethodInfo(\ReflectionMethod $method)
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{
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$method_id = $method->class . '::' . strtolower($method->getName());
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self::$cased_method_ids[$method_id] = $method->class . '::' . $method->name;
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if (strtolower((string)$method->name) === strtolower((string)$method->class)) {
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self::setDeclaringMethodId($method->class . '::__construct', $method_id);
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}
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if (isset(self::$have_reflected[$method_id])) {
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return null;
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}
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/** @var \ReflectionClass */
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$declaring_class = $method->getDeclaringClass();
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self::$have_reflected[$method_id] = true;
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self::$static_methods[$method_id] = $method->isStatic();
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self::$method_files[$method_id] = $method->getFileName();
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self::$method_namespaces[$method_id] = $declaring_class->getNamespaceName();
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self::$declaring_methods[$method_id] = $declaring_class->name . '::' . strtolower((string)$method->getName());
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self::$method_visibility[$method_id] = $method->isPrivate()
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? self::VISIBILITY_PRIVATE
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: ($method->isProtected() ? self::VISIBILITY_PROTECTED : self::VISIBILITY_PUBLIC);
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$params = $method->getParameters();
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$method_param_names = [];
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$method_param_types = [];
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self::$method_params[$method_id] = [];
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/** @var \ReflectionParameter $param */
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foreach ($params as $param) {
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$param_array = self::getReflectionParamArray($param);
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self::$method_params[$method_id][] = $param_array;
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$method_param_names[$param->name] = true;
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$method_param_types[$param->name] = $param_array->type;
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}
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$return_types = null;
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$config = Config::getInstance();
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$return_type = null;
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self::$method_return_type_locations[$method_id] = null;
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self::$method_return_types[$method_id] = $return_type;
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return null;
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}
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/**
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* Determines whether a given method is static or not
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*
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* @param string $method_id
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* @param CodeLocation $code_location
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* @param array<string> $suppressed_issues
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* @return bool
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*/
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public static function checkMethodStatic($method_id, CodeLocation $code_location, array $suppressed_issues)
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{
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self::registerClassMethod($method_id);
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/** @var string */
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$method_id = self::getDeclaringMethodId($method_id);
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if (!self::$static_methods[$method_id]) {
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if (IssueBuffer::accepts(
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new InvalidStaticInvocation(
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'Method ' . MethodChecker::getCasedMethodId($method_id) . ' is not static',
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$code_location
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),
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$suppressed_issues
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)) {
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return false;
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}
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}
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return true;
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}
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/**
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* @param PhpParser\Node\Stmt\ClassMethod $method
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* @return null|false
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* @psalm-suppress MixedAssignment
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*/
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protected function registerMethod(PhpParser\Node\Stmt\ClassMethod $method)
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{
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$method_id = $this->fq_class_name . '::' . strtolower($method->name);
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$cased_method_id = self::$cased_method_ids[$method_id] = $this->fq_class_name . '::' . $method->name;
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if (strtolower((string)$method->name) === strtolower((string)$this->class_name)) {
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self::setDeclaringMethodId($this->fq_class_name . '::__construct', $method_id);
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}
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self::$have_registered[$method_id] = true;
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self::$declaring_methods[$method_id] = $method_id;
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self::$static_methods[$method_id] = $method->isStatic();
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self::$method_namespaces[$method_id] = $this->namespace;
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self::$method_files[$method_id] = $this->file_name;
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if ($method->isPrivate()) {
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self::$method_visibility[$method_id] = self::VISIBILITY_PRIVATE;
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} elseif ($method->isProtected()) {
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self::$method_visibility[$method_id] = self::VISIBILITY_PROTECTED;
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} else {
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self::$method_visibility[$method_id] = self::VISIBILITY_PUBLIC;
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}
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self::$method_params[$method_id] = [];
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$method_param_names = [];
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foreach ($method->getParams() as $param) {
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$param_array = $this->getTranslatedParam(
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$param,
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$this
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);
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self::$method_params[$method_id][] = $param_array;
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$method_param_names[$param->name] = $param_array->type;
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}
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$config = Config::getInstance();
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$return_type = null;
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$return_type_location = null;
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$doc_comment = $method->getDocComment();
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self::$method_suppress[$method_id] = [];
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if (isset($method->returnType)) {
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$parser_return_type = $method->returnType;
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$suffix = '';
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if ($parser_return_type instanceof PhpParser\Node\NullableType) {
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$suffix = '|null';
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$parser_return_type = $parser_return_type->type;
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}
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$return_type = Type::parseString(
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(is_string($parser_return_type)
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? $parser_return_type
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: ClassLikeChecker::getFQCLNFromNameObject(
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$parser_return_type,
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$this->namespace,
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$this->getAliasedClasses()
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)
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) . $suffix
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);
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$return_type_location = new CodeLocation($this->getSource(), $method, false, self::RETURN_TYPE_REGEX);
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}
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if ($doc_comment) {
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$docblock_info = null;
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try {
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$docblock_info = CommentChecker::extractDocblockInfo((string)$doc_comment, $doc_comment->getLine());
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} catch (DocblockParseException $e) {
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if (IssueBuffer::accepts(
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new InvalidDocblock(
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'Invalid type passed in docblock for ' . $cased_method_id,
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new CodeLocation($this, $method)
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)
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)) {
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return false;
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}
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}
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if ($docblock_info) {
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if ($docblock_info->deprecated) {
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self::$deprecated_methods[$method_id] = true;
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}
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if ($docblock_info->variadic) {
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self::$variadic_methods[$method_id] = true;
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}
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$this->suppressed_issues = $docblock_info->suppress;
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self::$method_suppress[$method_id] = $this->suppressed_issues;
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if ($config->use_docblock_types) {
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if ($docblock_info->return_type) {
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$docblock_return_type = Type::parseString(
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$this->fixUpLocalType(
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(string)$docblock_info->return_type,
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$this->fq_class_name,
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$this->namespace,
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$this->getAliasedClasses()
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)
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);
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if (!$return_type_location) {
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$return_type_location = new CodeLocation($this->getSource(), $method, true);
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}
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if ($return_type && !TypeChecker::hasIdenticalTypes($return_type, $docblock_return_type)) {
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if (IssueBuffer::accepts(
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new InvalidDocblock(
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'Docblock return type does not match method return type for ' . $this->getMethodId(),
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new CodeLocation($this, $method, true)
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)
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)) {
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return false;
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}
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} else {
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$return_type = $docblock_return_type;
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}
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$return_type_location->setCommentLine($docblock_info->return_type_line_number);
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}
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if ($docblock_info->params) {
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$this->improveParamsFromDocblock(
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$docblock_info->params,
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$method_param_names,
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self::$method_params[$method_id],
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new CodeLocation($this, $method, true)
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);
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}
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}
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}
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}
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self::$method_return_type_locations[$method_id] = $return_type_location;
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self::$method_return_types[$method_id] = $return_type;
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return null;
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}
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/**
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* @param string $return_type
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* @param string $method_id
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* @return string
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*/
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protected static function fixUpReturnType($return_type, $method_id)
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{
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if (strpos($return_type, '[') !== false) {
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$return_type = Type::convertSquareBrackets($return_type);
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}
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$return_type_tokens = Type::tokenize($return_type);
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foreach ($return_type_tokens as $i => &$return_type_token) {
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if ($return_type_token[0] === '\\') {
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$return_type_token = substr($return_type_token, 1);
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continue;
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}
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if (in_array($return_type_token, ['<', '>', '|', '?', ',', '{', '}', ':'])) {
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continue;
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}
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if (isset($return_type_token[$i + 1]) && $return_type_token[$i + 1] === ':') {
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continue;
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}
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$return_type_token = Type::fixScalarTerms($return_type_token);
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if ($return_type_token[0] === strtoupper($return_type_token[0])) {
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$fq_class_name = explode('::', $method_id)[0];
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if ($return_type_token === '$this') {
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$return_type_token = $fq_class_name;
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continue;
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}
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$return_type_token = FileChecker::getFQCLNFromNameInFile(
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$return_type_token,
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self::$method_namespaces[$method_id],
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self::$method_files[$method_id]
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);
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}
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}
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return implode('', $return_type_tokens);
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}
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/**
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* @param string $method_id
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* @param CodeLocation $code_location
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* @param array $suppressed_issues
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* @return bool|null
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*/
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public static function checkMethodExists($method_id, CodeLocation $code_location, array $suppressed_issues)
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{
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if (self::methodExists($method_id)) {
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return true;
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}
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if (IssueBuffer::accepts(
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new UndefinedMethod('Method ' . $method_id . ' does not exist', $code_location),
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$suppressed_issues
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)) {
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return false;
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}
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return null;
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}
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/**
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* Whether or not a given method exists
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*
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* @param string $method_id
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* @return bool
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*/
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public static function methodExists($method_id)
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{
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// remove trailing backslash if it exists
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$method_id = preg_replace('/^\\\\/', '', $method_id);
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$method_parts = explode('::', $method_id);
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$method_parts[1] = strtolower($method_parts[1]);
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$method_id = implode('::', $method_parts);
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self::registerClassMethod($method_id);
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$old_method_id = null;
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if (isset(self::$declaring_methods[$method_id])) {
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return true;
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}
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// support checking oldstyle constructors
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if ($method_parts[1] === '__construct') {
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$method_part_parts = explode('\\', $method_parts[0]);
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$old_constructor_name = array_pop($method_part_parts);
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$old_method_id = $method_parts[0] . '::' . $old_constructor_name;
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}
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if (FunctionChecker::inCallMap($method_id) || ($old_method_id && FunctionChecker::inCallMap($method_id))) {
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return true;
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}
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return false;
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}
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/**
|
|
* @param string $method_id
|
|
* @return void
|
|
*/
|
|
public static function registerClassMethod($method_id)
|
|
{
|
|
ClassLikeChecker::registerClass(explode('::', $method_id)[0]);
|
|
}
|
|
|
|
/**
|
|
* @param string $method_id
|
|
* @param CodeLocation $code_location
|
|
* @param array $suppressed_issues
|
|
* @return false|null
|
|
*/
|
|
public static function checkMethodNotDeprecated($method_id, CodeLocation $code_location, array $suppressed_issues)
|
|
{
|
|
self::registerClassMethod($method_id);
|
|
|
|
if (isset(self::$deprecated_methods[$method_id])) {
|
|
if (IssueBuffer::accepts(
|
|
new DeprecatedMethod(
|
|
'The method ' . MethodChecker::getCasedMethodId($method_id) . ' has been marked as deprecated',
|
|
$code_location
|
|
),
|
|
$suppressed_issues
|
|
)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* @param string $method_id
|
|
* @param string|null $calling_context
|
|
* @param StatementsSource $source
|
|
* @param CodeLocation $code_location
|
|
* @param array $suppressed_issues
|
|
* @return false|null
|
|
*/
|
|
public static function checkMethodVisibility(
|
|
$method_id,
|
|
$calling_context,
|
|
StatementsSource $source,
|
|
CodeLocation $code_location,
|
|
array $suppressed_issues
|
|
) {
|
|
self::registerClassMethod($method_id);
|
|
|
|
$declared_method_id = self::getDeclaringMethodId($method_id);
|
|
|
|
$method_class = explode('::', (string)$method_id)[0];
|
|
$declaring_method_class = explode('::', (string)$declared_method_id)[0];
|
|
$method_name = explode('::', $method_id)[1];
|
|
|
|
if (TraitChecker::traitExists($declaring_method_class) && ClassLikeChecker::classUsesTrait($method_class, $declaring_method_class)) {
|
|
return null;
|
|
}
|
|
|
|
// if the calling class is the same, we know the method exists, so it must be visible
|
|
if ($method_class === $calling_context) {
|
|
return null;
|
|
}
|
|
|
|
if (!isset(self::$method_visibility[$declared_method_id])) {
|
|
if (IssueBuffer::accepts(
|
|
new InaccessibleMethod('Cannot access method ' . $method_id, $code_location),
|
|
$suppressed_issues
|
|
)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if ($source->getSource() instanceof TraitChecker && $declaring_method_class === $source->getFQCLN()) {
|
|
return null;
|
|
}
|
|
|
|
switch (self::$method_visibility[$declared_method_id]) {
|
|
case self::VISIBILITY_PUBLIC:
|
|
return null;
|
|
|
|
case self::VISIBILITY_PRIVATE:
|
|
if (!$calling_context || $declaring_method_class !== $calling_context) {
|
|
if (IssueBuffer::accepts(
|
|
new InaccessibleMethod(
|
|
'Cannot access private method ' . MethodChecker::getCasedMethodId($method_id) .
|
|
' from context ' . $calling_context,
|
|
$code_location
|
|
),
|
|
$suppressed_issues
|
|
)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
|
|
case self::VISIBILITY_PROTECTED:
|
|
if ($declaring_method_class === $calling_context) {
|
|
return null;
|
|
}
|
|
|
|
if (!$calling_context) {
|
|
if (IssueBuffer::accepts(
|
|
new InaccessibleMethod(
|
|
'Cannot access protected method ' . $method_id,
|
|
$code_location
|
|
),
|
|
$suppressed_issues
|
|
)) {
|
|
return false;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
if (ClassChecker::classExtends($declaring_method_class, $calling_context) &&
|
|
MethodChecker::methodExists($calling_context . '::' . $method_name)
|
|
) {
|
|
return null;
|
|
}
|
|
|
|
if (!ClassChecker::classExtends($calling_context, $declaring_method_class)) {
|
|
if (IssueBuffer::accepts(
|
|
new InaccessibleMethod(
|
|
'Cannot access protected method ' . MethodChecker::getCasedMethodId($method_id) .
|
|
' from context ' . $calling_context,
|
|
$code_location
|
|
),
|
|
$suppressed_issues
|
|
)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* @param string $method_id
|
|
* @param string $declaring_method_id
|
|
* @return void
|
|
*/
|
|
public static function setDeclaringMethodId($method_id, $declaring_method_id)
|
|
{
|
|
self::$declaring_methods[$method_id] = $declaring_method_id;
|
|
}
|
|
|
|
/**
|
|
* @param string $method_id
|
|
* @return string|null
|
|
*/
|
|
public static function getDeclaringMethodId($method_id)
|
|
{
|
|
if (isset(self::$declaring_methods[$method_id])) {
|
|
return self::$declaring_methods[$method_id];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* @param string $method_id
|
|
* @param string $overridden_method_id
|
|
* @return void
|
|
*/
|
|
public static function setOverriddenMethodId($method_id, $overridden_method_id)
|
|
{
|
|
self::$overridden_methods[$method_id][] = $overridden_method_id;
|
|
}
|
|
|
|
/**
|
|
* @param string $method_id
|
|
* @return array<string>
|
|
*/
|
|
public static function getOverriddenMethodIds($method_id)
|
|
{
|
|
return isset(self::$overridden_methods[$method_id]) ? self::$overridden_methods[$method_id] : [];
|
|
}
|
|
|
|
/**
|
|
* @param string $original_method_id
|
|
* @return string
|
|
*/
|
|
public static function getCasedMethodId($original_method_id)
|
|
{
|
|
$method_id = self::getDeclaringMethodId($original_method_id);
|
|
|
|
if ($method_id === null) {
|
|
throw new \UnexpectedValueException('Cannot get declaring method id for ' . $original_method_id);
|
|
}
|
|
|
|
return self::$cased_method_ids[$method_id];
|
|
}
|
|
|
|
/**
|
|
* @return void
|
|
*/
|
|
public static function clearCache()
|
|
{
|
|
self::$method_files = [];
|
|
self::$method_params = [];
|
|
self::$cased_method_ids = [];
|
|
self::$deprecated_methods = [];
|
|
self::$method_namespaces = [];
|
|
self::$method_return_types = [];
|
|
self::$method_return_type_locations = [];
|
|
self::$static_methods = [];
|
|
self::$declaring_methods = [];
|
|
self::$have_reflected = [];
|
|
self::$have_registered = [];
|
|
self::$method_visibility = [];
|
|
self::$overridden_methods = [];
|
|
}
|
|
}
|