mirror of
https://github.com/danog/psalm.git
synced 2024-12-16 11:26:55 +01:00
528 lines
22 KiB
PHP
528 lines
22 KiB
PHP
<?php
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namespace Psalm\Internal\Analyzer\Statements\Expression\Call;
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use PhpParser;
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use Psalm\Internal\Analyzer\ClassAnalyzer;
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use Psalm\Internal\Analyzer\ClassLikeAnalyzer;
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use Psalm\Internal\Analyzer\MethodAnalyzer;
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use Psalm\Internal\Analyzer\NamespaceAnalyzer;
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use Psalm\Internal\Analyzer\Statements\ExpressionAnalyzer;
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use Psalm\Internal\Analyzer\StatementsAnalyzer;
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use Psalm\CodeLocation;
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use Psalm\Context;
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use Psalm\Issue\AbstractInstantiation;
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use Psalm\Issue\DeprecatedClass;
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use Psalm\Issue\ImpureMethodCall;
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use Psalm\Issue\InterfaceInstantiation;
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use Psalm\Issue\InternalClass;
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use Psalm\Issue\InvalidStringClass;
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use Psalm\Issue\MixedMethodCall;
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use Psalm\Issue\TooManyArguments;
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use Psalm\Issue\UndefinedClass;
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use Psalm\IssueBuffer;
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use Psalm\Type;
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use Psalm\Type\Atomic\TNamedObject;
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use function in_array;
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use function strtolower;
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use function implode;
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use function explode;
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use function array_values;
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use function is_string;
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/**
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* @internal
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*/
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class NewAnalyzer extends \Psalm\Internal\Analyzer\Statements\Expression\CallAnalyzer
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{
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/**
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* @param StatementsAnalyzer $statements_analyzer
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* @param PhpParser\Node\Expr\New_ $stmt
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* @param Context $context
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*
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* @return false|null
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*/
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public static function analyze(
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StatementsAnalyzer $statements_analyzer,
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PhpParser\Node\Expr\New_ $stmt,
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Context $context
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) {
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$fq_class_name = null;
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$codebase = $statements_analyzer->getCodebase();
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$config = $codebase->config;
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$can_extend = false;
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if ($stmt->class instanceof PhpParser\Node\Name) {
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if (!in_array(strtolower($stmt->class->parts[0]), ['self', 'static', 'parent'], true)) {
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$aliases = $statements_analyzer->getAliases();
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if ($context->calling_method_id
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&& !$stmt->class instanceof PhpParser\Node\Name\FullyQualified
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) {
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$codebase->file_reference_provider->addMethodReferenceToClassMember(
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$context->calling_method_id,
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'use:' . $stmt->class->parts[0] . ':' . \md5($statements_analyzer->getFilePath())
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);
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}
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$fq_class_name = ClassLikeAnalyzer::getFQCLNFromNameObject(
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$stmt->class,
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$aliases
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);
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$fq_class_name = $codebase->classlikes->getUnAliasedName($fq_class_name);
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} else {
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switch ($stmt->class->parts[0]) {
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case 'self':
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$fq_class_name = $context->self;
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break;
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case 'parent':
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$fq_class_name = $context->parent;
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break;
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case 'static':
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// @todo maybe we can do better here
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$fq_class_name = $context->self;
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$can_extend = true;
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break;
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}
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}
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if ($codebase->store_node_types
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&& $fq_class_name
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&& !$context->collect_initializations
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&& !$context->collect_mutations
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) {
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$codebase->analyzer->addNodeReference(
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$statements_analyzer->getFilePath(),
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$stmt->class,
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$codebase->classlikes->classExists($fq_class_name)
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? $fq_class_name
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: '*' . implode('\\', $stmt->class->parts)
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);
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}
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} elseif ($stmt->class instanceof PhpParser\Node\Stmt\Class_) {
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$statements_analyzer->analyze([$stmt->class], $context);
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$fq_class_name = ClassAnalyzer::getAnonymousClassName($stmt->class, $statements_analyzer->getFilePath());
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} else {
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ExpressionAnalyzer::analyze($statements_analyzer, $stmt->class, $context);
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if (isset($stmt->class->inferredType)) {
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$has_single_class = $stmt->class->inferredType->isSingleStringLiteral();
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if ($has_single_class) {
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$fq_class_name = $stmt->class->inferredType->getSingleStringLiteral()->value;
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} else {
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$generic_params = null;
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if (self::checkMethodArgs(
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null,
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$stmt->args,
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$generic_params,
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$context,
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$statements_analyzer
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) === false) {
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return false;
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}
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}
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$new_type = null;
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foreach ($stmt->class->inferredType->getTypes() as $lhs_type_part) {
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if ($lhs_type_part instanceof Type\Atomic\TTemplateParamClass) {
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if (!isset($stmt->inferredType)) {
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$new_type_part = new Type\Atomic\TTemplateParam(
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$lhs_type_part->param_name,
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$lhs_type_part->as_type
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? new Type\Union([$lhs_type_part->as_type])
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: Type::parseString($lhs_type_part->as),
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$lhs_type_part->defining_class
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);
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if ($new_type) {
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$new_type = Type::combineUnionTypes(
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$new_type,
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new Type\Union([$new_type_part])
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);
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} else {
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$new_type = new Type\Union([$new_type_part]);
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}
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}
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continue;
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}
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if ($lhs_type_part instanceof Type\Atomic\TLiteralClassString
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|| $lhs_type_part instanceof Type\Atomic\TClassString
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) {
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if (!isset($stmt->inferredType)) {
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$class_name = $lhs_type_part instanceof Type\Atomic\TClassString
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? $lhs_type_part->as
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: $lhs_type_part->value;
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if ($lhs_type_part instanceof Type\Atomic\TClassString) {
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$can_extend = true;
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}
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if ($class_name === 'object') {
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if (IssueBuffer::accepts(
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new MixedMethodCall(
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'Cannot call constructor on an unknown class',
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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}
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if ($new_type) {
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$new_type = Type::combineUnionTypes(
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$new_type,
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Type::parseString($class_name)
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);
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} else {
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$new_type = Type::parseString($class_name);
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}
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}
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continue;
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}
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if ($lhs_type_part instanceof Type\Atomic\TString) {
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if ($config->allow_string_standin_for_class
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&& !$lhs_type_part instanceof Type\Atomic\TNumericString
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) {
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// do nothing
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} elseif (IssueBuffer::accepts(
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new InvalidStringClass(
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'String cannot be used as a class',
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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} elseif ($lhs_type_part instanceof Type\Atomic\TMixed
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|| $lhs_type_part instanceof Type\Atomic\TTemplateParam
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) {
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if (IssueBuffer::accepts(
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new MixedMethodCall(
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'Cannot call constructor on an unknown class',
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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} elseif ($lhs_type_part instanceof Type\Atomic\TFalse
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&& $stmt->class->inferredType->ignore_falsable_issues
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) {
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// do nothing
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} elseif ($lhs_type_part instanceof Type\Atomic\TNull
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&& $stmt->class->inferredType->ignore_nullable_issues
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) {
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// do nothing
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} elseif (IssueBuffer::accepts(
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new UndefinedClass(
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'Type ' . $lhs_type_part . ' cannot be called as a class',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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(string)$lhs_type_part
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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if ($new_type) {
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$new_type = Type::combineUnionTypes(
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$new_type,
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Type::getObject()
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);
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} else {
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$new_type = Type::getObject();
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}
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}
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if (!$has_single_class) {
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if ($new_type) {
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$stmt->inferredType = $new_type;
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}
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return null;
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}
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} else {
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return null;
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}
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}
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if ($fq_class_name) {
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if ($codebase->alter_code) {
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$codebase->classlikes->handleClassLikeReferenceInMigration(
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$codebase,
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$statements_analyzer,
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$stmt->class,
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$fq_class_name,
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$context->calling_method_id
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);
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}
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if ($context->check_classes) {
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if ($context->isPhantomClass($fq_class_name)) {
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return null;
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}
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if (ClassLikeAnalyzer::checkFullyQualifiedClassLikeName(
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$statements_analyzer,
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$fq_class_name,
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new CodeLocation($statements_analyzer->getSource(), $stmt->class),
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$statements_analyzer->getSuppressedIssues(),
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false
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) === false) {
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return;
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}
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if ($codebase->interfaceExists($fq_class_name)) {
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if (IssueBuffer::accepts(
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new InterfaceInstantiation(
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'Interface ' . $fq_class_name . ' cannot be instantiated',
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new CodeLocation($statements_analyzer->getSource(), $stmt->class)
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),
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$statements_analyzer->getSuppressedIssues()
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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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$stmt->inferredType = new Type\Union([new TNamedObject($fq_class_name)]);
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if (strtolower($fq_class_name) !== 'stdclass' &&
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$codebase->classlikes->classExists($fq_class_name)
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) {
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$storage = $codebase->classlike_storage_provider->get($fq_class_name);
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// if we're not calling this constructor via new static()
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if ($storage->abstract && !$can_extend) {
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if (IssueBuffer::accepts(
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new AbstractInstantiation(
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'Unable to instantiate a abstract class ' . $fq_class_name,
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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return;
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}
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}
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if ($storage->deprecated && $fq_class_name !== $context->self) {
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if (IssueBuffer::accepts(
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new DeprecatedClass(
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$fq_class_name . ' is marked deprecated',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$fq_class_name
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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}
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if ($storage->psalm_internal && $context->self) {
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if (! NamespaceAnalyzer::isWithin($context->self, $storage->psalm_internal)) {
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if (IssueBuffer::accepts(
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new InternalClass(
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$fq_class_name . ' is marked internal to ' . $storage->psalm_internal,
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$fq_class_name
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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}
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}
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if ($storage->internal && $context->self) {
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if (! NamespaceAnalyzer::nameSpaceRootsMatch($context->self, $fq_class_name)) {
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if (IssueBuffer::accepts(
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new InternalClass(
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$fq_class_name . ' is marked internal',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$fq_class_name
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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}
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}
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if ($codebase->methods->methodExists(
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$fq_class_name . '::__construct',
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$context->calling_method_id,
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$context->collect_references ? new CodeLocation($statements_analyzer->getSource(), $stmt) : null,
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null,
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$statements_analyzer->getFilePath()
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)) {
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$method_id = $fq_class_name . '::__construct';
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if (!$context->collect_initializations
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&& !$context->collect_mutations
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) {
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ArgumentMapPopulator::recordArgumentPositions(
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$statements_analyzer,
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$stmt,
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$codebase,
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$method_id
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);
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}
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if (self::checkMethodArgs(
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$method_id,
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$stmt->args,
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$found_generic_params,
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$context,
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$statements_analyzer
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) === false) {
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return false;
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}
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if (MethodAnalyzer::checkMethodVisibility(
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$method_id,
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$context,
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$statements_analyzer->getSource(),
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$statements_analyzer->getSuppressedIssues()
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) === false) {
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return false;
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}
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if ($context->pure) {
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$declaring_method_id = $codebase->methods->getDeclaringMethodId($method_id);
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if ($declaring_method_id) {
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$method_storage = $codebase->methods->getStorage($declaring_method_id);
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if (!$method_storage->external_mutation_free) {
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if (IssueBuffer::accepts(
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new ImpureMethodCall(
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'Cannot call an impure constructor from a pure context',
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new CodeLocation($statements_analyzer, $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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}
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}
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}
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$generic_param_types = null;
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if ($storage->template_types) {
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$declaring_method_id = $codebase->methods->getDeclaringMethodId($method_id);
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$declaring_fq_class_name = $declaring_method_id
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? explode('::', $declaring_method_id)[0]
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: $fq_class_name;
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foreach ($storage->template_types as $template_name => $base_type) {
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if (isset($found_generic_params[$template_name][$fq_class_name])) {
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$generic_param_type = $found_generic_params[$template_name][$fq_class_name][0];
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} elseif ($storage->template_type_extends && $found_generic_params) {
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$generic_param_type = self::getGenericParamForOffset(
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$declaring_fq_class_name,
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$template_name,
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$storage->template_type_extends,
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$found_generic_params
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);
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} else {
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$generic_param_type = array_values($base_type)[0][0];
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}
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$generic_param_type->had_template = true;
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$generic_param_types[] = $generic_param_type;
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}
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}
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if ($generic_param_types) {
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$stmt->inferredType = new Type\Union([
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new Type\Atomic\TGenericObject(
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$fq_class_name,
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$generic_param_types
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),
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]);
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}
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} elseif ($stmt->args) {
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if (IssueBuffer::accepts(
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new TooManyArguments(
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'Class ' . $fq_class_name . ' has no __construct, but arguments were passed',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$fq_class_name . '::__construct'
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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}
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if ($storage->external_mutation_free) {
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$stmt->inferredType->external_mutation_free = true;
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}
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}
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}
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if (!$config->remember_property_assignments_after_call && !$context->collect_initializations) {
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$context->removeAllObjectVars();
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}
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return null;
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}
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/**
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* @param string $template_name
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* @param array<string, array<int|string, Type\Union>> $template_type_extends
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* @param array<string, array<string, array{Type\Union}>> $found_generic_params
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* @return Type\Union
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*/
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private static function getGenericParamForOffset(
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string $fq_class_name,
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string $template_name,
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array $template_type_extends,
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array $found_generic_params
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) {
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if (isset($found_generic_params[$template_name][$fq_class_name])) {
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return $found_generic_params[$template_name][$fq_class_name][0];
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}
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foreach ($template_type_extends as $type_map) {
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foreach ($type_map as $extended_template_name => $extended_type) {
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foreach ($extended_type->getTypes() as $extended_atomic_type) {
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if (is_string($extended_template_name)
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&& $extended_atomic_type instanceof Type\Atomic\TTemplateParam
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&& $extended_atomic_type->param_name === $template_name
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&& $extended_template_name !== $template_name
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) {
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return self::getGenericParamForOffset(
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$fq_class_name,
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$extended_template_name,
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$template_type_extends,
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$found_generic_params
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);
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}
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}
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}
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}
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return Type::getMixed();
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}
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}
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