mirror of
https://github.com/danog/psalm.git
synced 2024-12-15 19:07:00 +01:00
710 lines
26 KiB
PHP
710 lines
26 KiB
PHP
<?php
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namespace Psalm\Checker;
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use PhpParser;
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use Psalm\Checker\Statements\ExpressionChecker;
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use Psalm\CodeLocation;
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use Psalm\Issue\DeprecatedMethod;
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use Psalm\Issue\ImplementedReturnTypeMismatch;
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use Psalm\Issue\InaccessibleMethod;
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use Psalm\Issue\InvalidStaticInvocation;
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use Psalm\Issue\MethodSignatureMismatch;
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use Psalm\Issue\MethodSignatureMustOmitReturnType;
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use Psalm\Issue\MoreSpecificImplementedParamType;
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use Psalm\Issue\LessSpecificImplementedReturnType;
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use Psalm\Issue\NonStaticSelfCall;
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use Psalm\Issue\OverriddenMethodAccess;
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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\Storage\ClassLikeStorage;
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use Psalm\Storage\MethodStorage;
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use Psalm\Type;
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class MethodChecker extends FunctionLikeChecker
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{
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/**
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* @param PhpParser\Node\FunctionLike $function
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* @param StatementsSource $source
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* @psalm-suppress MixedAssignment
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*/
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public function __construct($function, StatementsSource $source)
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{
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if (!$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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}
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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 bool $self_call
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* @param bool $is_context_dynamic
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* @param CodeLocation $code_location
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* @param array<string> $suppressed_issues
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* @param bool $is_dynamic_this_method
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*
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* @return bool
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*/
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public static function checkStatic(
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$method_id,
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$self_call,
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$is_context_dynamic,
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ProjectChecker $project_checker,
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CodeLocation $code_location,
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array $suppressed_issues,
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&$is_dynamic_this_method = false
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) {
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$codebase_methods = $project_checker->codebase->methods;
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$method_id = $codebase_methods->getDeclaringMethodId($method_id);
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if (!$method_id) {
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throw new \LogicException('Method id should not be null');
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}
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$storage = $codebase_methods->getStorage($method_id);
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if (!$storage->is_static) {
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if ($self_call) {
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if (!$is_context_dynamic) {
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if (IssueBuffer::accepts(
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new NonStaticSelfCall(
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'Method ' . $codebase_methods->getCasedMethodId($method_id) .
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' is not static, but is called ' .
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'using self::',
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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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} else {
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$is_dynamic_this_method = true;
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}
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} else {
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if (IssueBuffer::accepts(
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new InvalidStaticInvocation(
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'Method ' . $codebase_methods->getCasedMethodId($method_id) .
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' is not static, but is called ' .
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'statically',
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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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}
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return true;
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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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* @param string|null $source_method_id
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*
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* @return bool|null
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*/
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public static function checkMethodExists(
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ProjectChecker $project_checker,
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$method_id,
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CodeLocation $code_location,
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array $suppressed_issues,
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$source_method_id = null
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) {
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if ($project_checker->codebase->methodExists(
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$method_id,
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$source_method_id !== $method_id ? $code_location : null
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)) {
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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, $method_id),
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$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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* @param string $method_id
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* @param CodeLocation $code_location
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* @param array $suppressed_issues
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*
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* @return false|null
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*/
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public static function checkMethodNotDeprecated(
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ProjectChecker $project_checker,
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$method_id,
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CodeLocation $code_location,
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array $suppressed_issues
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) {
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$codebase_methods = $project_checker->codebase->methods;
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$method_id = (string) $codebase_methods->getDeclaringMethodId($method_id);
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$storage = $codebase_methods->getStorage($method_id);
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if ($storage->deprecated) {
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if (IssueBuffer::accepts(
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new DeprecatedMethod(
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'The method ' . $codebase_methods->getCasedMethodId($method_id) .
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' has been marked as deprecated',
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$code_location,
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$method_id
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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 null;
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}
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/**
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* @param string $method_id
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* @param string|null $calling_context
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* @param StatementsSource $source
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* @param CodeLocation $code_location
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* @param array $suppressed_issues
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*
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* @return false|null
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*/
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public static function checkMethodVisibility(
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$method_id,
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$calling_context,
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StatementsSource $source,
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CodeLocation $code_location,
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array $suppressed_issues
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) {
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$project_checker = $source->getFileChecker()->project_checker;
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$codebase = $project_checker->codebase;
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$codebase_methods = $codebase->methods;
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$codebase_classlikes = $codebase->classlikes;
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$declaring_method_id = $codebase_methods->getDeclaringMethodId($method_id);
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if (!$declaring_method_id) {
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$method_name = explode('::', $method_id)[1];
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if ($method_name === '__construct' || $method_id === 'Closure::__invoke') {
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return null;
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}
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throw new \UnexpectedValueException('$declaring_method_id not expected to be null here');
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}
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$appearing_method_id = $codebase_methods->getAppearingMethodId($method_id);
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$appearing_method_class = null;
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if ($appearing_method_id) {
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list($appearing_method_class) = explode('::', $appearing_method_id);
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// if the calling class is the same, we know the method exists, so it must be visible
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if ($appearing_method_class === $calling_context) {
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return null;
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}
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}
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list($declaring_method_class) = explode('::', $declaring_method_id);
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if ($source->getSource() instanceof TraitChecker && $declaring_method_class === $source->getFQCLN()) {
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return null;
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}
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$storage = $project_checker->codebase->methods->getStorage($declaring_method_id);
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switch ($storage->visibility) {
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case ClassLikeChecker::VISIBILITY_PUBLIC:
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return null;
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case ClassLikeChecker::VISIBILITY_PRIVATE:
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if (!$calling_context || $appearing_method_class !== $calling_context) {
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if (IssueBuffer::accepts(
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new InaccessibleMethod(
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'Cannot access private method ' . $codebase_methods->getCasedMethodId($method_id) .
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' from context ' . $calling_context,
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$code_location
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),
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$suppressed_issues
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)) {
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return false;
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}
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}
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return null;
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case ClassLikeChecker::VISIBILITY_PROTECTED:
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if (!$calling_context) {
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if (IssueBuffer::accepts(
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new InaccessibleMethod(
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'Cannot access protected method ' . $method_id,
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$code_location
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),
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$suppressed_issues
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)) {
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return false;
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}
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return null;
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}
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if ($appearing_method_class
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&& $codebase_classlikes->classExtends($appearing_method_class, $calling_context)
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) {
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return null;
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}
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if ($appearing_method_class
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&& !$codebase_classlikes->classExtends($calling_context, $appearing_method_class)
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) {
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if (IssueBuffer::accepts(
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new InaccessibleMethod(
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'Cannot access protected method ' . $codebase_methods->getCasedMethodId($method_id) .
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' from context ' . $calling_context,
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$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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}
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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 string|null $calling_context
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* @param StatementsSource $source
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*
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* @return bool
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*/
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public static function isMethodVisible(
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$method_id,
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$calling_context,
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StatementsSource $source
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) {
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$project_checker = $source->getFileChecker()->project_checker;
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$codebase = $project_checker->codebase;
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$declaring_method_id = $codebase->methods->getDeclaringMethodId($method_id);
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if (!$declaring_method_id) {
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$method_name = explode('::', $method_id)[1];
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if ($method_name === '__construct') {
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return true;
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}
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throw new \UnexpectedValueException('$declaring_method_id not expected to be null here');
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}
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$appearing_method_id = $codebase->methods->getAppearingMethodId($method_id);
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$appearing_method_class = null;
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if ($appearing_method_id) {
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list($appearing_method_class) = explode('::', $appearing_method_id);
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// if the calling class is the same, we know the method exists, so it must be visible
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if ($appearing_method_class === $calling_context) {
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return true;
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}
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}
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list($declaring_method_class) = explode('::', $declaring_method_id);
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if ($source->getSource() instanceof TraitChecker && $declaring_method_class === $source->getFQCLN()) {
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return true;
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}
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$storage = $codebase->methods->getStorage($declaring_method_id);
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switch ($storage->visibility) {
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case ClassLikeChecker::VISIBILITY_PUBLIC:
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return true;
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case ClassLikeChecker::VISIBILITY_PRIVATE:
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if (!$calling_context || $appearing_method_class !== $calling_context) {
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return false;
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}
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return true;
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case ClassLikeChecker::VISIBILITY_PROTECTED:
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if (!$calling_context) {
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return false;
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}
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if ($appearing_method_class
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&& $codebase->classExtends($appearing_method_class, $calling_context)
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) {
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return true;
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}
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if ($appearing_method_class
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&& !$codebase->classExtends($calling_context, $appearing_method_class)
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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 ProjectChecker $project_checker
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* @param ClassLikeStorage $implementer_classlike_storage
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* @param ClassLikeStorage $guide_classlike_storage
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* @param MethodStorage $implementer_method_storage
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* @param MethodStorage $guide_method_storage
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* @param CodeLocation $code_location
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* @param array $suppressed_issues
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* @param bool $prevent_abstract_override
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*
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* @return false|null
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*/
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public static function compareMethods(
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ProjectChecker $project_checker,
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ClassLikeStorage $implementer_classlike_storage,
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ClassLikeStorage $guide_classlike_storage,
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MethodStorage $implementer_method_storage,
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MethodStorage $guide_method_storage,
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CodeLocation $code_location,
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array $suppressed_issues,
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$prevent_abstract_override = true
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) {
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$codebase = $project_checker->codebase;
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$implementer_method_id = $implementer_classlike_storage->name . '::'
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. strtolower($guide_method_storage->cased_name);
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$implementer_declaring_method_id = $codebase->methods->getDeclaringMethodId($implementer_method_id);
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$cased_implementer_method_id = $implementer_classlike_storage->name . '::'
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. $implementer_method_storage->cased_name;
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$cased_guide_method_id = $guide_classlike_storage->name . '::' . $guide_method_storage->cased_name;
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if ($implementer_method_storage->visibility > $guide_method_storage->visibility) {
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if (IssueBuffer::accepts(
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new OverriddenMethodAccess(
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'Method ' . $cased_implementer_method_id . ' has different access level than '
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. $cased_guide_method_id,
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$code_location
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)
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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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if ($prevent_abstract_override
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&& !$guide_method_storage->abstract
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&& $implementer_method_storage->abstract
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&& !$guide_classlike_storage->abstract
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&& !$guide_classlike_storage->is_interface
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) {
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if (IssueBuffer::accepts(
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new MethodSignatureMismatch(
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'Method ' . $cased_implementer_method_id . ' cannot be abstract when inherited method '
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. $cased_guide_method_id . ' is non-abstract',
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$code_location
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)
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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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if ($guide_method_storage->signature_return_type) {
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$guide_signature_return_type = ExpressionChecker::fleshOutType(
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$project_checker,
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$guide_method_storage->signature_return_type,
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$guide_classlike_storage->name,
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$guide_classlike_storage->name
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);
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$implementer_signature_return_type = $implementer_method_storage->signature_return_type
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? ExpressionChecker::fleshOutType(
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$project_checker,
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$implementer_method_storage->signature_return_type,
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$implementer_classlike_storage->name,
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$implementer_classlike_storage->name
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) : null;
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if (!TypeChecker::isContainedByInPhp($implementer_signature_return_type, $guide_signature_return_type)) {
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if (IssueBuffer::accepts(
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new MethodSignatureMismatch(
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'Method ' . $cased_implementer_method_id . ' with return type \''
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. $implementer_signature_return_type . '\' is different to return type \''
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. $guide_signature_return_type . '\' of inherited method ' . $cased_guide_method_id,
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$code_location
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)
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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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} elseif ($guide_method_storage->return_type
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&& $implementer_method_storage->return_type
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&& $implementer_classlike_storage->user_defined
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&& !$guide_classlike_storage->stubbed
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) {
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$implementer_method_storage_return_type = ExpressionChecker::fleshOutType(
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$project_checker,
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$implementer_method_storage->return_type,
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$implementer_classlike_storage->name,
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$implementer_classlike_storage->name
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);
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$guide_method_storage_return_type = ExpressionChecker::fleshOutType(
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$project_checker,
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$guide_method_storage->return_type,
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$guide_classlike_storage->name,
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$guide_classlike_storage->name
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);
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// treat void as null when comparing against docblock implementer
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if ($implementer_method_storage_return_type->isVoid()) {
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$implementer_method_storage_return_type = Type::getNull();
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}
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if ($guide_method_storage_return_type->isVoid()) {
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$guide_method_storage_return_type = Type::getNull();
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}
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if (!TypeChecker::isContainedBy(
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$codebase,
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$implementer_method_storage_return_type,
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$guide_method_storage_return_type,
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false,
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false,
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$has_scalar_match,
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$type_coerced,
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$type_coerced_from_mixed
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)) {
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// is the declared return type more specific than the inferred one?
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if ($type_coerced) {
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if (IssueBuffer::accepts(
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new LessSpecificImplementedReturnType(
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'The return type \'' . $guide_method_storage->return_type
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. '\' for ' . $cased_guide_method_id . ' is more specific than the implemented '
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. 'return type for ' . $implementer_declaring_method_id . ' \''
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. $implementer_method_storage->return_type . '\'',
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$implementer_method_storage->return_type_location ?: $code_location
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),
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$suppressed_issues
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)) {
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return false;
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}
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} else {
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if (IssueBuffer::accepts(
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new ImplementedReturnTypeMismatch(
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'The return type \'' . $guide_method_storage->return_type
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. '\' for ' . $cased_guide_method_id . ' is different to the implemented '
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. 'return type for ' . $implementer_declaring_method_id . ' \''
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. $implementer_method_storage->return_type . '\'',
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$implementer_method_storage->return_type_location ?: $code_location
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),
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$suppressed_issues
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)) {
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return false;
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}
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}
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}
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}
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foreach ($guide_method_storage->params as $i => $guide_param) {
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if (!isset($implementer_method_storage->params[$i])) {
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if (!$prevent_abstract_override && $i >= $guide_method_storage->required_param_count) {
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continue;
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}
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|
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if (IssueBuffer::accepts(
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new MethodSignatureMismatch(
|
|
'Method ' . $cased_implementer_method_id . ' has fewer parameters than parent method ' .
|
|
$cased_guide_method_id,
|
|
$code_location
|
|
)
|
|
)) {
|
|
return false;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
$implementer_param = $implementer_method_storage->params[$i];
|
|
|
|
if ($guide_classlike_storage->user_defined
|
|
&& $implementer_param->signature_type
|
|
&& !TypeChecker::isContainedByInPhp($guide_param->signature_type, $implementer_param->signature_type)
|
|
) {
|
|
if (IssueBuffer::accepts(
|
|
new MethodSignatureMismatch(
|
|
'Argument ' . ($i + 1) . ' of ' . $cased_implementer_method_id . ' has wrong type \'' .
|
|
$implementer_param->signature_type . '\', expecting \'' .
|
|
$guide_param->signature_type . '\' as defined by ' .
|
|
$cased_guide_method_id,
|
|
$implementer_method_storage->params[$i]->location
|
|
?: $code_location
|
|
)
|
|
)) {
|
|
return false;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
if ($guide_classlike_storage->user_defined
|
|
&& $implementer_param->type
|
|
&& $guide_param->type
|
|
&& $implementer_param->type->getId() !== $guide_param->type->getId()
|
|
) {
|
|
if (!TypeChecker::isContainedBy(
|
|
$codebase,
|
|
$guide_param->type,
|
|
$implementer_param->type,
|
|
false,
|
|
false
|
|
)) {
|
|
if (IssueBuffer::accepts(
|
|
new MoreSpecificImplementedParamType(
|
|
'Argument ' . ($i + 1) . ' of ' . $cased_implementer_method_id . ' has wrong type \'' .
|
|
$implementer_param->type . '\', expecting \'' .
|
|
$guide_param->type . '\' as defined by ' .
|
|
$cased_guide_method_id,
|
|
$implementer_method_storage->params[$i]->location
|
|
?: $code_location
|
|
),
|
|
$suppressed_issues
|
|
)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($guide_classlike_storage->user_defined && $implementer_param->by_ref !== $guide_param->by_ref) {
|
|
if (IssueBuffer::accepts(
|
|
new MethodSignatureMismatch(
|
|
'Argument ' . ($i + 1) . ' of ' . $cased_implementer_method_id . ' is' .
|
|
($implementer_param->by_ref ? '' : ' not') . ' passed by reference, but argument ' .
|
|
($i + 1) . ' of ' . $cased_guide_method_id . ' is' . ($guide_param->by_ref ? '' : ' not'),
|
|
$implementer_method_storage->params[$i]->location
|
|
?: $code_location
|
|
)
|
|
)) {
|
|
return false;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
$implemeneter_param_type = $implementer_method_storage->params[$i]->type;
|
|
|
|
$or_null_guide_type = $guide_param->signature_type
|
|
? clone $guide_param->signature_type
|
|
: null;
|
|
|
|
if ($or_null_guide_type) {
|
|
$or_null_guide_type->addType(new Type\Atomic\TNull);
|
|
}
|
|
|
|
if (!$guide_classlike_storage->user_defined
|
|
&& $guide_param->type
|
|
&& !$guide_param->type->isMixed()
|
|
&& !$guide_param->type->from_docblock
|
|
&& (
|
|
!$implemeneter_param_type
|
|
|| (
|
|
$implemeneter_param_type->getId() !== $guide_param->type->getId()
|
|
&& (
|
|
!$or_null_guide_type
|
|
|| $implemeneter_param_type->getId() !== $or_null_guide_type->getId()
|
|
)
|
|
)
|
|
)
|
|
) {
|
|
if (IssueBuffer::accepts(
|
|
new MethodSignatureMismatch(
|
|
'Argument ' . ($i + 1) . ' of ' . $cased_implementer_method_id . ' has wrong type \'' .
|
|
$implementer_method_storage->params[$i]->type . '\', expecting \'' .
|
|
$guide_param->type . '\' as defined by ' .
|
|
$cased_guide_method_id,
|
|
$implementer_method_storage->params[$i]->location
|
|
?: $code_location
|
|
)
|
|
)) {
|
|
return false;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|
|
|
|
if ($guide_classlike_storage->user_defined
|
|
&& $implementer_method_storage->cased_name !== '__construct'
|
|
&& $implementer_method_storage->required_param_count > $guide_method_storage->required_param_count
|
|
) {
|
|
if (IssueBuffer::accepts(
|
|
new MethodSignatureMismatch(
|
|
'Method ' . $cased_implementer_method_id . ' has more required parameters than parent method ' .
|
|
$cased_guide_method_id,
|
|
$code_location
|
|
)
|
|
)) {
|
|
return false;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check that __clone, __construct, and __destruct do not have a return type
|
|
* hint in their signature.
|
|
*
|
|
* @param MethodStorage $method_storage
|
|
* @param CodeLocation $code_location
|
|
* @return false|null
|
|
*/
|
|
public static function checkMethodSignatureMustOmitReturnType(
|
|
MethodStorage $method_storage,
|
|
CodeLocation $code_location
|
|
) {
|
|
if ($method_storage->signature_return_type === null) {
|
|
return null;
|
|
}
|
|
|
|
$cased_method_name = $method_storage->cased_name;
|
|
$methodsOfInterest = ['__clone', '__construct', '__destruct'];
|
|
if (in_array($cased_method_name, $methodsOfInterest)) {
|
|
if (IssueBuffer::accepts(
|
|
new MethodSignatureMustOmitReturnType(
|
|
'Method ' . $cased_method_name . ' must not declare a return type',
|
|
$code_location
|
|
)
|
|
)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|