mirror of
https://github.com/danog/psalm.git
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447 lines
17 KiB
PHP
447 lines
17 KiB
PHP
<?php
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namespace Psalm\Internal\Analyzer\Statements\Expression\Fetch;
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use PhpParser;
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use Psalm\Internal\Analyzer\ClassLikeAnalyzer;
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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\Internal\Analyzer\TraitAnalyzer;
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use Psalm\Internal\FileManipulation\FileManipulationBuffer;
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use Psalm\Codebase;
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use Psalm\CodeLocation;
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use Psalm\Context;
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use Psalm\Issue\DeprecatedConstant;
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use Psalm\Issue\InaccessibleClassConstant;
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use Psalm\Issue\ParentNotFound;
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use Psalm\Issue\UndefinedConstant;
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use Psalm\IssueBuffer;
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use Psalm\Type;
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/**
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* @internal
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*/
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class ConstFetchAnalyzer
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{
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/**
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* @param StatementsAnalyzer $statements_analyzer
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* @param PhpParser\Node\Expr\ConstFetch $stmt
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* @param Context $context
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*
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* @return void
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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\ConstFetch $stmt,
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Context $context
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) {
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$const_name = implode('\\', $stmt->name->parts);
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switch (strtolower($const_name)) {
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case 'null':
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$stmt->inferredType = Type::getNull();
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break;
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case 'false':
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// false is a subtype of bool
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$stmt->inferredType = Type::getFalse();
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break;
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case 'true':
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$stmt->inferredType = Type::getTrue();
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break;
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case 'stdin':
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$stmt->inferredType = Type::getResource();
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break;
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default:
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$const_type = $statements_analyzer->getConstType(
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$const_name,
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$stmt->name instanceof PhpParser\Node\Name\FullyQualified,
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$context
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);
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if ($const_type) {
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$stmt->inferredType = clone $const_type;
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} elseif ($context->check_consts) {
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if (IssueBuffer::accepts(
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new UndefinedConstant(
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'Const ' . $const_name . ' is not defined',
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new CodeLocation($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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}
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}
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/**
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* @param StatementsAnalyzer $statements_analyzer
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* @param PhpParser\Node\Expr\ClassConstFetch $stmt
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* @param Context $context
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*
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* @return null|false
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*/
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public static function analyzeClassConst(
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StatementsAnalyzer $statements_analyzer,
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PhpParser\Node\Expr\ClassConstFetch $stmt,
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Context $context
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) {
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$codebase = $statements_analyzer->getCodebase();
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if ($stmt->class instanceof PhpParser\Node\Name) {
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if ($context->check_consts
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|| ($stmt->name instanceof PhpParser\Node\Identifier && $stmt->name->name === 'class')
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) {
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$first_part_lc = strtolower($stmt->class->parts[0]);
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if ($first_part_lc === 'self' || $first_part_lc === 'static') {
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if (!$context->self) {
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throw new \UnexpectedValueException('$context->self cannot be null');
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}
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$fq_class_name = (string)$context->self;
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} elseif ($first_part_lc === 'parent') {
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$fq_class_name = $statements_analyzer->getParentFQCLN();
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if ($fq_class_name === null) {
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if (IssueBuffer::accepts(
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new ParentNotFound(
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'Cannot check property fetch on parent as this class does not extend another',
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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 false;
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}
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return;
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}
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} else {
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$fq_class_name = ClassLikeAnalyzer::getFQCLNFromNameObject(
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$stmt->class,
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$statements_analyzer->getAliases()
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);
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if ($stmt->name instanceof PhpParser\Node\Identifier) {
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if (!$context->inside_class_exists || $stmt->name->name !== 'class') {
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if (ClassLikeAnalyzer::checkFullyQualifiedClassLikeName(
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$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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true
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) === false) {
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return;
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}
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}
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}
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}
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$moved_class = false;
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if ($codebase->alter_code) {
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$moved_class = $codebase->classlikes->handleClassLikeReferenceInMigration(
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$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 ($stmt->name instanceof PhpParser\Node\Identifier && $stmt->name->name === 'class') {
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$stmt->inferredType = Type::getLiteralClassString($fq_class_name);
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if ($codebase->store_node_types) {
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$codebase->analyzer->addNodeReference(
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$statements_analyzer->getFilePath(),
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$stmt->class,
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$fq_class_name
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);
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}
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return null;
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}
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// if we're ignoring that the class doesn't exist, exit anyway
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if (!$codebase->classOrInterfaceExists($fq_class_name)) {
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$stmt->inferredType = Type::getMixed();
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return null;
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}
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if ($codebase->store_node_types) {
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$codebase->analyzer->addNodeReference(
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$statements_analyzer->getFilePath(),
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$stmt->class,
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$fq_class_name
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);
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}
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if (!$stmt->name instanceof PhpParser\Node\Identifier) {
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return;
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}
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$const_id = $fq_class_name . '::' . $stmt->name;
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if ($codebase->store_node_types) {
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$codebase->analyzer->addNodeReference(
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$statements_analyzer->getFilePath(),
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$stmt->name,
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$const_id
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);
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}
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if ($fq_class_name === $context->self
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|| (
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$statements_analyzer->getSource()->getSource() instanceof TraitAnalyzer &&
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$fq_class_name === $statements_analyzer->getSource()->getFQCLN()
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)
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) {
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$class_visibility = \ReflectionProperty::IS_PRIVATE;
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} elseif ($context->self &&
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$codebase->classExtends($context->self, $fq_class_name)
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) {
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$class_visibility = \ReflectionProperty::IS_PROTECTED;
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} else {
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$class_visibility = \ReflectionProperty::IS_PUBLIC;
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}
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$class_constants = $codebase->classlikes->getConstantsForClass(
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$fq_class_name,
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$class_visibility
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);
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if (!isset($class_constants[$stmt->name->name])) {
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$all_class_constants = [];
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if ($fq_class_name !== $context->self) {
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$all_class_constants = $codebase->classlikes->getConstantsForClass(
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$fq_class_name,
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\ReflectionProperty::IS_PRIVATE
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);
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}
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if ($all_class_constants && isset($all_class_constants[$stmt->name->name])) {
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if (IssueBuffer::accepts(
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new InaccessibleClassConstant(
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'Constant ' . $const_id . ' is not visible in this context',
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new CodeLocation($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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} else {
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if (IssueBuffer::accepts(
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new UndefinedConstant(
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'Constant ' . $const_id . ' is not defined',
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new CodeLocation($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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return;
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}
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if ($context->calling_method_id) {
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$codebase->file_reference_provider->addMethodReferenceToClassMember(
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$context->calling_method_id,
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strtolower($fq_class_name) . '::' . $stmt->name->name
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);
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}
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$declaring_const_id = strtolower($fq_class_name) . '::' . $stmt->name->name;
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if ($codebase->alter_code && !$moved_class) {
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foreach ($codebase->class_constant_transforms as $original_pattern => $transformation) {
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if ($declaring_const_id === $original_pattern) {
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list($new_fq_class_name, $new_const_name) = explode('::', $transformation);
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$file_manipulations = [];
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if (strtolower($new_fq_class_name) !== strtolower($fq_class_name)) {
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$file_manipulations[] = new \Psalm\FileManipulation(
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(int) $stmt->class->getAttribute('startFilePos'),
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(int) $stmt->class->getAttribute('endFilePos') + 1,
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Type::getStringFromFQCLN(
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$new_fq_class_name,
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$statements_analyzer->getNamespace(),
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$statements_analyzer->getAliasedClassesFlipped(),
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null
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)
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);
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}
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$file_manipulations[] = new \Psalm\FileManipulation(
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(int) $stmt->name->getAttribute('startFilePos'),
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(int) $stmt->name->getAttribute('endFilePos') + 1,
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$new_const_name
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);
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FileManipulationBuffer::add($statements_analyzer->getFilePath(), $file_manipulations);
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}
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}
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}
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$class_const_storage = $codebase->classlike_storage_provider->get($fq_class_name);
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if (isset($class_const_storage->deprecated_constants[$stmt->name->name])) {
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if (IssueBuffer::accepts(
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new DeprecatedConstant(
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'Constant ' . $const_id . ' is deprecated',
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new CodeLocation($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 (isset($class_constants[$stmt->name->name]) && $first_part_lc !== 'static') {
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$stmt->inferredType = clone $class_constants[$stmt->name->name];
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$context->vars_in_scope[$const_id] = $stmt->inferredType;
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} else {
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$stmt->inferredType = Type::getMixed();
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}
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return null;
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}
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} elseif ($stmt->name instanceof PhpParser\Node\Identifier && $stmt->name->name === 'class') {
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ExpressionAnalyzer::analyze($statements_analyzer, $stmt->class, $context);
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$lhs_type = $stmt->class->inferredType;
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$class_string_types = [];
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$has_mixed_or_object = false;
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if ($lhs_type) {
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foreach ($lhs_type->getTypes() as $lhs_atomic_type) {
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if ($lhs_atomic_type instanceof Type\Atomic\TNamedObject) {
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$class_string_types[] = new Type\Atomic\TClassString(
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$lhs_atomic_type->value,
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clone $lhs_atomic_type
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);
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} elseif ($lhs_atomic_type instanceof Type\Atomic\TObject
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|| $lhs_atomic_type instanceof Type\Atomic\TMixed
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) {
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$has_mixed_or_object = true;
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}
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}
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}
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if ($has_mixed_or_object) {
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$stmt->inferredType = new Type\Union([new Type\Atomic\TClassString()]);
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} elseif ($class_string_types) {
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$stmt->inferredType = new Type\Union($class_string_types);
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} else {
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$stmt->inferredType = Type::getMixed();
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}
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return;
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}
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$stmt->inferredType = Type::getMixed();
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if ($stmt->class instanceof PhpParser\Node\Expr) {
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if (ExpressionAnalyzer::analyze($statements_analyzer, $stmt->class, $context) === false) {
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return;
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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 Codebase $codebase
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* @param ?string $fq_const_name
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* @param string $const_name
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*
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* @return Type\Union|null
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*/
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public static function getGlobalConstType(
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Codebase $codebase,
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$fq_const_name,
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$const_name
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) {
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if ($const_name === 'STDERR'
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|| $const_name === 'STDOUT'
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|| $const_name === 'STDIN'
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) {
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return Type::getResource();
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}
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$predefined_constants = $codebase->config->getPredefinedConstants();
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if (isset($predefined_constants[$fq_const_name])
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|| isset($predefined_constants[$const_name])
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) {
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switch ($const_name) {
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case 'PHP_VERSION':
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case 'DIRECTORY_SEPARATOR':
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case 'PATH_SEPARATOR':
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case 'PEAR_EXTENSION_DIR':
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case 'PEAR_INSTALL_DIR':
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case 'PHP_BINARY':
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case 'PHP_BINDIR':
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case 'PHP_CONFIG_FILE_PATH':
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case 'PHP_CONFIG_FILE_SCAN_DIR':
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case 'PHP_DATADIR':
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case 'PHP_EOL':
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case 'PHP_EXTENSION_DIR':
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case 'PHP_EXTRA_VERSION':
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case 'PHP_LIBDIR':
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case 'PHP_LOCALSTATEDIR':
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case 'PHP_MANDIR':
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case 'PHP_OS':
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case 'PHP_OS_FAMILY':
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case 'PHP_PREFIX':
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case 'PHP_SAPI':
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case 'PHP_SYSCONFDIR':
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return Type::getString();
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case 'PHP_MAJOR_VERSION':
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case 'PHP_MINOR_VERSION':
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case 'PHP_RELEASE_VERSION':
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case 'PHP_DEBUG':
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case 'PHP_FLOAT_DIG':
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case 'PHP_INT_MAX':
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case 'PHP_INT_MIN':
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case 'PHP_INT_SIZE':
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case 'PHP_MAXPATHLEN':
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case 'PHP_VERSION_ID':
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case 'PHP_ZTS':
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return Type::getInt();
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case 'PHP_FLOAT_EPSILON':
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case 'PHP_FLOAT_MAX':
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case 'PHP_FLOAT_MIN':
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return Type::getFloat();
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}
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if ($fq_const_name && isset($predefined_constants[$fq_const_name])) {
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return ClassLikeAnalyzer::getTypeFromValue($predefined_constants[$fq_const_name]);
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}
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return ClassLikeAnalyzer::getTypeFromValue($predefined_constants[$const_name]);
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}
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$stubbed_const_type = $codebase->getStubbedConstantType(
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$fq_const_name ?: $const_name
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);
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if ($stubbed_const_type) {
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return $stubbed_const_type;
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}
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return null;
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}
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}
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