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psalm/src/Psalm/Internal/Analyzer/Statements/Expression/Call/MethodCallAnalyzer.php

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<?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\ClassLikeAnalyzer;
use Psalm\Internal\Analyzer\FunctionLikeAnalyzer;
use Psalm\Internal\Analyzer\MethodAnalyzer;
use Psalm\Internal\Analyzer\Statements\ExpressionAnalyzer;
use Psalm\Internal\Analyzer\StatementsAnalyzer;
use Psalm\Internal\Analyzer\TypeAnalyzer;
use Psalm\Internal\Codebase\CallMap;
use Psalm\Codebase;
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use Psalm\CodeLocation;
use Psalm\Context;
use Psalm\Internal\FileManipulation\FileManipulationBuffer;
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use Psalm\Issue\InvalidMethodCall;
use Psalm\Issue\InvalidPropertyAssignmentValue;
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use Psalm\Issue\InvalidScope;
use Psalm\Issue\MixedMethodCall;
use Psalm\Issue\MixedPropertyTypeCoercion;
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use Psalm\Issue\NullReference;
use Psalm\Issue\PossiblyFalseReference;
use Psalm\Issue\PossiblyInvalidMethodCall;
use Psalm\Issue\PossiblyInvalidPropertyAssignmentValue;
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use Psalm\Issue\PossiblyNullReference;
use Psalm\Issue\PossiblyUndefinedMethod;
use Psalm\Issue\PropertyTypeCoercion;
use Psalm\Issue\UndefinedInterfaceMethod;
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use Psalm\Issue\UndefinedMethod;
use Psalm\Issue\UndefinedThisPropertyAssignment;
use Psalm\Issue\UndefinedThisPropertyFetch;
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use Psalm\IssueBuffer;
use Psalm\Storage\Assertion;
use Psalm\Storage\ClassLikeStorage;
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use Psalm\Type;
use Psalm\Type\Atomic\TGenericObject;
use Psalm\Type\Atomic\TNamedObject;
/**
* @internal
*/
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class MethodCallAnalyzer extends \Psalm\Internal\Analyzer\Statements\Expression\CallAnalyzer
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{
/**
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* @param StatementsAnalyzer $statements_analyzer
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* @param PhpParser\Node\Expr\MethodCall $stmt
* @param Context $context
*
* @return false|null
*/
public static function analyze(
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StatementsAnalyzer $statements_analyzer,
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PhpParser\Node\Expr\MethodCall $stmt,
Context $context,
bool $real_method_call = true
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) {
$stmt->inferredType = null;
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if (ExpressionAnalyzer::analyze($statements_analyzer, $stmt->var, $context) === false) {
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return false;
}
if (!$stmt->name instanceof PhpParser\Node\Identifier) {
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if (ExpressionAnalyzer::analyze($statements_analyzer, $stmt->name, $context) === false) {
return false;
}
}
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if ($stmt->var instanceof PhpParser\Node\Expr\Variable) {
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if (is_string($stmt->var->name) && $stmt->var->name === 'this' && !$statements_analyzer->getFQCLN()) {
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if (IssueBuffer::accepts(
new InvalidScope(
'Use of $this in non-class context',
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
return false;
}
}
}
$lhs_var_id = ExpressionAnalyzer::getArrayVarId(
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$stmt->var,
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$statements_analyzer->getFQCLN(),
$statements_analyzer
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);
$class_type = $lhs_var_id && $context->hasVariable($lhs_var_id, $statements_analyzer)
? $context->vars_in_scope[$lhs_var_id]
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: null;
if (isset($stmt->var->inferredType)) {
$class_type = $stmt->var->inferredType;
} elseif (!$class_type) {
$stmt->inferredType = Type::getMixed();
}
if (!$context->check_classes) {
if (self::checkFunctionArguments(
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$statements_analyzer,
$stmt->args,
null,
null,
$context
) === false) {
return false;
}
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return null;
}
$has_mock = false;
if ($class_type && $stmt->name instanceof PhpParser\Node\Identifier && $class_type->isNull()) {
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if (IssueBuffer::accepts(
new NullReference(
'Cannot call method ' . $stmt->name->name . ' on null value',
new CodeLocation($statements_analyzer->getSource(), $stmt->name)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
return false;
}
return null;
}
if ($class_type
&& $stmt->name instanceof PhpParser\Node\Identifier
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&& $class_type->isNullable()
&& !$class_type->ignore_nullable_issues
) {
if (IssueBuffer::accepts(
new PossiblyNullReference(
'Cannot call method ' . $stmt->name->name . ' on possibly null value',
new CodeLocation($statements_analyzer->getSource(), $stmt->name)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
// fall through
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}
}
if ($class_type
&& $stmt->name instanceof PhpParser\Node\Identifier
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&& $class_type->isFalsable()
&& !$class_type->ignore_falsable_issues
) {
if (IssueBuffer::accepts(
new PossiblyFalseReference(
'Cannot call method ' . $stmt->name->name . ' on possibly false value',
new CodeLocation($statements_analyzer->getSource(), $stmt->name)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
// fall through
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}
}
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$codebase = $statements_analyzer->getCodebase();
$config = $codebase->config;
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$non_existent_class_method_ids = [];
$non_existent_interface_method_ids = [];
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$existent_method_ids = [];
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$has_mixed_method_call = false;
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$invalid_method_call_types = [];
$has_valid_method_call_type = false;
$source = $statements_analyzer->getSource();
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$returns_by_ref = false;
$no_method_id = false;
if (!$class_type) {
$class_type = Type::getMixed();
}
$return_type = null;
$lhs_types = $class_type->getTypes();
foreach ($lhs_types as $lhs_type_part) {
$result = self::analyzeAtomicCall(
$statements_analyzer,
$stmt,
$codebase,
$context,
$lhs_type_part,
$lhs_type_part instanceof Type\Atomic\TNamedObject ? $lhs_type_part : null,
$lhs_var_id,
$return_type,
$returns_by_ref,
$has_mock,
$has_valid_method_call_type,
$has_mixed_method_call,
$invalid_method_call_types,
$existent_method_ids,
$non_existent_class_method_ids,
$non_existent_interface_method_ids
);
if ($result === false) {
return false;
}
if ($result === true) {
$no_method_id = true;
}
}
if ($invalid_method_call_types) {
$invalid_class_type = $invalid_method_call_types[0];
if ($has_valid_method_call_type || $has_mixed_method_call) {
if (IssueBuffer::accepts(
new PossiblyInvalidMethodCall(
'Cannot call method on possible ' . $invalid_class_type . ' variable ' . $lhs_var_id,
new CodeLocation($source, $stmt->name)
),
$statements_analyzer->getSuppressedIssues()
)) {
// keep going
}
} else {
if (IssueBuffer::accepts(
new InvalidMethodCall(
'Cannot call method on ' . $invalid_class_type . ' variable ' . $lhs_var_id,
new CodeLocation($source, $stmt->name)
),
$statements_analyzer->getSuppressedIssues()
)) {
// keep going
}
}
}
if ($non_existent_class_method_ids) {
if ($context->check_methods) {
if ($existent_method_ids || $has_mixed_method_call) {
if (IssueBuffer::accepts(
new PossiblyUndefinedMethod(
'Method ' . $non_existent_class_method_ids[0] . ' does not exist',
new CodeLocation($source, $stmt->name),
$non_existent_class_method_ids[0]
),
$statements_analyzer->getSuppressedIssues()
)) {
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// keep going
}
} else {
if (IssueBuffer::accepts(
new UndefinedMethod(
'Method ' . $non_existent_class_method_ids[0] . ' does not exist',
new CodeLocation($source, $stmt->name),
$non_existent_class_method_ids[0]
),
$statements_analyzer->getSuppressedIssues()
)) {
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// keep going
}
}
}
return null;
}
if ($non_existent_interface_method_ids) {
if ($context->check_methods) {
if ($existent_method_ids || $has_mixed_method_call) {
if (IssueBuffer::accepts(
new PossiblyUndefinedMethod(
'Method ' . $non_existent_interface_method_ids[0] . ' does not exist',
new CodeLocation($source, $stmt->name),
$non_existent_interface_method_ids[0]
),
$statements_analyzer->getSuppressedIssues()
)) {
// keep going
}
} else {
if (IssueBuffer::accepts(
new UndefinedInterfaceMethod(
'Method ' . $non_existent_interface_method_ids[0] . ' does not exist',
new CodeLocation($source, $stmt->name),
$non_existent_interface_method_ids[0]
),
$statements_analyzer->getSuppressedIssues()
)) {
// keep going
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}
}
}
return null;
}
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$stmt->inferredType = $return_type;
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if ($returns_by_ref) {
if (!$stmt->inferredType) {
$stmt->inferredType = Type::getMixed();
}
$stmt->inferredType->by_ref = $returns_by_ref;
}
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if ($no_method_id) {
return self::checkMethodArgs(
null,
$stmt->args,
$found_generic_params,
$context,
new CodeLocation($statements_analyzer->getSource(), $stmt),
$statements_analyzer
);
}
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if ($codebase->store_node_types
&& (!$context->collect_initializations
&& !$context->collect_mutations)
&& isset($stmt->inferredType)
) {
$codebase->analyzer->addNodeType(
$statements_analyzer->getFilePath(),
$stmt->name,
(string) $stmt->inferredType,
$stmt
);
}
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if (!$config->remember_property_assignments_after_call && !$context->collect_initializations) {
$context->removeAllObjectVars();
}
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// if we called a method on this nullable variable, remove the nullable status here
// because any further calls must have worked
if ($lhs_var_id
&& !$class_type->isMixed()
&& $has_valid_method_call_type
&& !$has_mixed_method_call
&& !$invalid_method_call_types
&& $existent_method_ids
&& ($class_type->from_docblock || $class_type->isNullable())
&& $real_method_call
) {
$keys_to_remove = [];
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foreach ($class_type->getTypes() as $key => $type) {
if (!$type instanceof TNamedObject) {
$keys_to_remove[] = $key;
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} else {
$type->from_docblock = false;
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}
}
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foreach ($keys_to_remove as $key) {
$class_type->removeType($key);
}
$class_type->from_docblock = false;
$context->removeVarFromConflictingClauses($lhs_var_id, null, $statements_analyzer);
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$context->vars_in_scope[$lhs_var_id] = $class_type;
}
}
/**
* [analyzeAtomicCall description]
* @param StatementsAnalyzer $statements_analyzer
* @param PhpParser\Node\Expr\MethodCall $stmt
* @param Codebase $codebase
* @param Context $context
* @param Type\Atomic $lhs_type_part
* @param ?string $lhs_var_id
* @param ?Type\Union &$return_type
* @param bool &$returns_by_ref
* @param bool &$has_mock
* @param bool &$has_valid_method_call_type
* @param bool &$has_mixed_method_call
* @param array<string> &$invalid_method_call_types
* @param array<string> &$existent_method_ids
* @param array<string> &$non_existent_class_method_ids
* @param array<string> &$non_existent_interface_method_ids
* @return null|bool
*/
private static function analyzeAtomicCall(
StatementsAnalyzer $statements_analyzer,
PhpParser\Node\Expr\MethodCall $stmt,
Codebase $codebase,
Context $context,
Type\Atomic $lhs_type_part,
?Type\Atomic\TNamedObject $static_type,
$lhs_var_id,
&$return_type,
&$returns_by_ref,
&$has_mock,
&$has_valid_method_call_type,
&$has_mixed_method_call,
&$invalid_method_call_types,
&$existent_method_ids,
&$non_existent_class_method_ids,
&$non_existent_interface_method_ids,
bool &$check_visibility = true
) {
$config = $codebase->config;
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if ($lhs_type_part instanceof Type\Atomic\TTemplateParam
&& !$lhs_type_part->as->isMixed()
) {
$extra_types = $lhs_type_part->extra_types;
$lhs_type_part = array_values(
$lhs_type_part->as->getTypes()
)[0];
$lhs_type_part->from_docblock = true;
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if ($lhs_type_part instanceof TNamedObject) {
$lhs_type_part->extra_types = $extra_types;
}
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$has_mixed_method_call = true;
}
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$source = $statements_analyzer->getSource();
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if (!$lhs_type_part instanceof TNamedObject) {
switch (get_class($lhs_type_part)) {
case Type\Atomic\TNull::class:
case Type\Atomic\TFalse::class:
// handled above
return;
case Type\Atomic\TInt::class:
case Type\Atomic\TLiteralInt::class:
case Type\Atomic\TFloat::class:
case Type\Atomic\TLiteralFloat::class:
case Type\Atomic\TBool::class:
case Type\Atomic\TTrue::class:
case Type\Atomic\TArray::class:
case Type\Atomic\TNonEmptyArray::class:
case Type\Atomic\ObjectLike::class:
case Type\Atomic\TString::class:
case Type\Atomic\TSingleLetter::class:
case Type\Atomic\TLiteralString::class:
case Type\Atomic\TLiteralClassString::class:
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case Type\Atomic\TTemplateParamClass::class:
case Type\Atomic\TNumericString::class:
case Type\Atomic\THtmlEscapedString::class:
case Type\Atomic\TClassString::class:
case Type\Atomic\TIterable::class:
$invalid_method_call_types[] = (string)$lhs_type_part;
return;
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case Type\Atomic\TTemplateParam::class:
case Type\Atomic\TEmptyMixed::class:
case Type\Atomic\TMixed::class:
case Type\Atomic\TNonEmptyMixed::class:
case Type\Atomic\TObject::class:
case Type\Atomic\TObjectWithProperties::class:
if (!$context->collect_initializations
&& !$context->collect_mutations
&& $statements_analyzer->getFilePath() === $statements_analyzer->getRootFilePath()
&& (!(($parent_source = $statements_analyzer->getSource())
instanceof \Psalm\Internal\Analyzer\FunctionLikeAnalyzer)
|| !$parent_source->getSource() instanceof \Psalm\Internal\Analyzer\TraitAnalyzer)
) {
$codebase->analyzer->incrementMixedCount($statements_analyzer->getFilePath());
}
$has_mixed_method_call = true;
if ($stmt->name instanceof PhpParser\Node\Identifier) {
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$codebase->analyzer->addMixedMemberName(
strtolower($stmt->name->name),
$context->calling_method_id ?: $statements_analyzer->getFileName()
);
}
if ($context->check_methods) {
if (IssueBuffer::accepts(
new MixedMethodCall(
'Cannot determine the type of the object on the left hand side of this expression',
new CodeLocation($source, $stmt->name)
),
$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
}
if (self::checkFunctionArguments(
$statements_analyzer,
$stmt->args,
null,
null,
$context
) === false) {
return false;
}
$return_type = Type::getMixed();
return;
}
return;
}
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if (!$context->collect_initializations
&& !$context->collect_mutations
&& $statements_analyzer->getFilePath() === $statements_analyzer->getRootFilePath()
&& (!(($parent_source = $statements_analyzer->getSource())
instanceof \Psalm\Internal\Analyzer\FunctionLikeAnalyzer)
|| !$parent_source->getSource() instanceof \Psalm\Internal\Analyzer\TraitAnalyzer)
) {
$codebase->analyzer->incrementNonMixedCount($statements_analyzer->getFilePath());
}
$has_valid_method_call_type = true;
$fq_class_name = $lhs_type_part->value;
$is_mock = ExpressionAnalyzer::isMock($fq_class_name);
$has_mock = $has_mock || $is_mock;
if ($fq_class_name === 'static') {
$fq_class_name = (string) $context->self;
}
if ($is_mock ||
$context->isPhantomClass($fq_class_name)
) {
$return_type = Type::getMixed();
if (self::checkFunctionArguments(
$statements_analyzer,
$stmt->args,
null,
null,
$context
) === false) {
return false;
}
return;
}
if ($lhs_var_id === '$this') {
$does_class_exist = true;
} else {
$does_class_exist = ClassLikeAnalyzer::checkFullyQualifiedClassLikeName(
$statements_analyzer,
$fq_class_name,
new CodeLocation($source, $stmt->var),
$statements_analyzer->getSuppressedIssues(),
true,
false,
true,
$lhs_type_part->from_docblock
);
}
if (!$does_class_exist) {
$non_existent_class_method_ids[] = $fq_class_name . '::*';
return false;
}
$class_storage = $codebase->classlike_storage_provider->get($fq_class_name);
$check_visibility = $check_visibility && !$class_storage->override_method_visibility;
$intersection_types = $lhs_type_part->getIntersectionTypes();
$all_intersection_return_type = null;
$all_intersection_existent_method_ids = [];
if ($intersection_types) {
foreach ($intersection_types as $intersection_type) {
$i_non_existent_class_method_ids = [];
$i_non_existent_interface_method_ids = [];
$intersection_return_type = null;
self::analyzeAtomicCall(
$statements_analyzer,
$stmt,
$codebase,
$context,
$intersection_type,
$lhs_type_part,
$lhs_var_id,
$intersection_return_type,
$returns_by_ref,
$has_mock,
$has_valid_method_call_type,
$has_mixed_method_call,
$invalid_method_call_types,
$all_intersection_existent_method_ids,
$i_non_existent_class_method_ids,
$i_non_existent_interface_method_ids,
$check_visibility
);
if ($intersection_return_type) {
if (!$all_intersection_return_type || $all_intersection_return_type->isMixed()) {
$all_intersection_return_type = $intersection_return_type;
} else {
$all_intersection_return_type = Type::intersectUnionTypes(
$all_intersection_return_type,
$intersection_return_type
);
}
}
}
}
if (!$stmt->name instanceof PhpParser\Node\Identifier) {
if (!$context->ignore_variable_method) {
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$codebase->analyzer->addMixedMemberName(
strtolower($fq_class_name) . '::',
$context->calling_method_id ?: $statements_analyzer->getFileName()
);
}
$return_type = Type::getMixed();
return true;
}
$method_name_lc = strtolower($stmt->name->name);
$method_id = $fq_class_name . '::' . $method_name_lc;
$intersection_method_id = $intersection_types
? '(' . $lhs_type_part . ')' . '::' . $stmt->name->name
: null;
$args = $stmt->args;
if (!$codebase->methods->methodExists(
$method_id,
$context->calling_method_id,
$codebase->collect_references ? new CodeLocation($source, $stmt->name) : null,
null,
$statements_analyzer->getFilePath()
)
|| !MethodAnalyzer::isMethodVisible(
$method_id,
$context,
$statements_analyzer->getSource()
)
) {
$interface_has_method = false;
if ($class_storage->abstract && $class_storage->class_implements) {
foreach ($class_storage->class_implements as $interface_fqcln) {
$interface_storage = $codebase->classlike_storage_provider->get($interface_fqcln);
if (isset($interface_storage->methods[$method_name_lc])) {
$interface_has_method = true;
$fq_class_name = $interface_fqcln;
$method_id = $fq_class_name . '::' . $method_name_lc;
break;
}
}
}
if (!$interface_has_method
&& $codebase->methods->methodExists(
$fq_class_name . '::__call',
$context->calling_method_id
)
) {
if (isset($class_storage->pseudo_methods[$method_name_lc])) {
$has_valid_method_call_type = true;
$existent_method_ids[] = $method_id;
$pseudo_method_storage = $class_storage->pseudo_methods[$method_name_lc];
if (self::checkFunctionArguments(
$statements_analyzer,
$args,
$pseudo_method_storage->params,
$method_id,
$context
) === false) {
return false;
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}
$generic_params = [];
if (self::checkFunctionLikeArgumentsMatch(
$statements_analyzer,
$args,
null,
$pseudo_method_storage->params,
$pseudo_method_storage,
null,
$generic_params,
new CodeLocation($source, $stmt),
$context
) === false) {
return false;
}
if ($pseudo_method_storage->return_type) {
$return_type_candidate = clone $pseudo_method_storage->return_type;
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$return_type_candidate = ExpressionAnalyzer::fleshOutType(
$codebase,
$return_type_candidate,
$fq_class_name,
$fq_class_name,
$class_storage->parent_class
);
if ($all_intersection_return_type) {
$return_type_candidate = Type::intersectUnionTypes(
$all_intersection_return_type,
$return_type_candidate
);
}
if (!$return_type) {
$return_type = $return_type_candidate;
} else {
$return_type = Type::combineUnionTypes($return_type_candidate, $return_type);
}
return;
}
} else {
if (self::checkFunctionArguments(
$statements_analyzer,
$args,
null,
null,
$context
) === false) {
return false;
}
if ($class_storage->sealed_methods) {
$non_existent_class_method_ids[] = $method_id;
return true;
}
}
$has_valid_method_call_type = true;
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$existent_method_ids[] = $method_id;
$array_values = array_map(
/**
* @return PhpParser\Node\Expr\ArrayItem
*/
function (PhpParser\Node\Arg $arg) {
return new PhpParser\Node\Expr\ArrayItem($arg->value);
},
$args
);
$args = [
new PhpParser\Node\Arg(new PhpParser\Node\Scalar\String_($method_name_lc)),
new PhpParser\Node\Arg(new PhpParser\Node\Expr\Array_($array_values)),
];
$method_id = $fq_class_name . '::__call';
}
}
$source_source = $statements_analyzer->getSource();
2018-01-29 00:29:38 +01:00
/**
* @var \Psalm\Internal\Analyzer\ClassLikeAnalyzer|null
*/
$classlike_source = $source_source->getSource();
$classlike_source_fqcln = $classlike_source ? $classlike_source->getFQCLN() : null;
if ($lhs_var_id === '$this'
&& $context->self
&& $classlike_source_fqcln
&& $fq_class_name !== $context->self
&& $codebase->methodExists($context->self . '::' . $method_name_lc)
) {
$method_id = $context->self . '::' . $method_name_lc;
$fq_class_name = $context->self;
}
$is_interface = false;
if ($codebase->interfaceExists($fq_class_name)) {
$is_interface = true;
}
$source_method_id = $source instanceof FunctionLikeAnalyzer
? $source->getMethodId()
: null;
if (!$codebase->methods->methodExists(
$method_id,
$context->calling_method_id,
$method_id !== $source_method_id ? new CodeLocation($source, $stmt->name) : null
)) {
$class_storage = $codebase->classlike_storage_provider->get($fq_class_name);
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if (($is_interface || $config->use_phpdoc_method_without_magic_or_parent)
&& isset($class_storage->pseudo_methods[$method_name_lc])
) {
$has_valid_method_call_type = true;
$existent_method_ids[] = $method_id;
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$pseudo_method_storage = $class_storage->pseudo_methods[$method_name_lc];
if (self::checkFunctionArguments(
$statements_analyzer,
$args,
$pseudo_method_storage->params,
$method_id,
$context
) === false) {
return false;
}
$generic_params = [];
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if (self::checkFunctionLikeArgumentsMatch(
$statements_analyzer,
$args,
null,
$pseudo_method_storage->params,
$pseudo_method_storage,
null,
$generic_params,
new CodeLocation($source, $stmt->name),
$context
) === false) {
return false;
}
if ($pseudo_method_storage->return_type) {
$return_type_candidate = clone $pseudo_method_storage->return_type;
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if ($all_intersection_return_type) {
$return_type_candidate = Type::intersectUnionTypes(
$all_intersection_return_type,
$return_type_candidate
);
}
if (!$return_type) {
$return_type = $return_type_candidate;
} else {
$return_type = Type::combineUnionTypes($return_type_candidate, $return_type);
}
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return;
}
$return_type = Type::getMixed();
return;
}
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if ($all_intersection_return_type && $all_intersection_existent_method_ids) {
$existent_method_ids = array_merge($existent_method_ids, $all_intersection_existent_method_ids);
if (!$return_type) {
$return_type = $all_intersection_return_type;
} else {
$return_type = Type::combineUnionTypes($all_intersection_return_type, $return_type);
}
return;
}
if ($is_interface) {
$non_existent_interface_method_ids[] = $intersection_method_id ?: $method_id;
} else {
$non_existent_class_method_ids[] = $intersection_method_id ?: $method_id;
}
return true;
}
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if ($context->collect_initializations && $context->calling_method_id) {
list($calling_method_class) = explode('::', $context->calling_method_id);
$codebase->file_reference_provider->addMethodReferenceToClassMember(
$calling_method_class . '::__construct',
strtolower($method_id)
);
}
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$existent_method_ids[] = $method_id;
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if ($stmt->var instanceof PhpParser\Node\Expr\Variable
&& ($context->collect_initializations || $context->collect_mutations)
&& $stmt->var->name === 'this'
&& $source instanceof FunctionLikeAnalyzer
) {
self::collectSpecialInformation($source, $stmt->name->name, $context);
}
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$fq_class_name = $codebase->classlikes->getUnAliasedName($fq_class_name);
$parent_source = $statements_analyzer->getSource();
$class_template_params = self::getClassTemplateParams(
$codebase,
$codebase->methods->getClassLikeStorageForMethod($method_id),
$fq_class_name,
$method_name_lc,
$lhs_type_part,
$lhs_var_id
);
if ($lhs_var_id === '$this' && $parent_source instanceof \Psalm\Internal\Analyzer\FunctionLikeAnalyzer) {
$grandparent_source = $parent_source->getSource();
if ($grandparent_source instanceof \Psalm\Internal\Analyzer\TraitAnalyzer) {
$fq_trait_name = $grandparent_source->getFQCLN();
$trait_storage = $codebase->classlike_storage_provider->get($fq_trait_name);
if (isset($trait_storage->methods[$method_name_lc])) {
$trait_method_id = $fq_trait_name . '::' . $method_name_lc;
$class_template_params = self::getClassTemplateParams(
$codebase,
$codebase->methods->getClassLikeStorageForMethod($trait_method_id),
$fq_class_name,
$method_name_lc,
$lhs_type_part,
$lhs_var_id
);
}
}
}
if (self::checkMethodArgs(
$method_id,
$args,
$class_template_params,
$context,
new CodeLocation($source, $stmt->name),
$statements_analyzer
) === false) {
return false;
}
switch (strtolower($stmt->name->name)) {
case '__tostring':
$return_type = Type::getString();
return;
}
$declaring_method_id = $codebase->methods->getDeclaringMethodId($method_id);
$call_map_id = strtolower(
$declaring_method_id ?: $method_id
);
if ($method_name_lc === '__tostring') {
$return_type_candidate = Type::getString();
} else {
$return_type_candidate = null;
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if ($codebase->methods->return_type_provider->has($fq_class_name)) {
$return_type_candidate = $codebase->methods->return_type_provider->getReturnType(
$statements_analyzer,
$fq_class_name,
$stmt->name->name,
$stmt->args,
$context,
new CodeLocation($statements_analyzer->getSource(), $stmt->name),
$lhs_type_part instanceof TGenericObject ? $lhs_type_part->type_params : null
);
}
if (!$return_type_candidate && $declaring_method_id && $declaring_method_id !== $method_id) {
list($declaring_fq_class_name, $declaring_method_name) = explode('::', $declaring_method_id);
if ($codebase->methods->return_type_provider->has($declaring_fq_class_name)) {
$return_type_candidate = $codebase->methods->return_type_provider->getReturnType(
$statements_analyzer,
$declaring_fq_class_name,
$declaring_method_name,
$stmt->args,
$context,
new CodeLocation($statements_analyzer->getSource(), $stmt->name),
$lhs_type_part instanceof TGenericObject ? $lhs_type_part->type_params : null,
$fq_class_name,
$stmt->name->name
);
}
}
$class_storage = $codebase->methods->getClassLikeStorageForMethod($method_id);
if (!$return_type_candidate) {
if ($call_map_id && CallMap::inCallMap($call_map_id)) {
if (($class_template_params || $class_storage->stubbed)
&& isset($class_storage->methods[$method_name_lc])
&& ($method_storage = $class_storage->methods[$method_name_lc])
&& $method_storage->return_type
) {
$return_type_candidate = clone $method_storage->return_type;
if ($class_template_params) {
$return_type_candidate->replaceTemplateTypesWithArgTypes(
$class_template_params,
$codebase
);
}
} else {
$callmap_callables = CallMap::getCallablesFromCallMap($call_map_id);
if (!$callmap_callables || $callmap_callables[0]->return_type === null) {
throw new \UnexpectedValueException('Shouldnt get here');
}
$return_type_candidate = $callmap_callables[0]->return_type;
}
if ($return_type_candidate->isFalsable()) {
$return_type_candidate->ignore_falsable_issues = true;
}
$return_type_candidate = ExpressionAnalyzer::fleshOutType(
$codebase,
$return_type_candidate,
$fq_class_name,
$static_type,
$class_storage->parent_class
);
} else {
$name_code_location = new CodeLocation($source, $stmt->name);
if ($check_visibility) {
if (MethodAnalyzer::checkMethodVisibility(
$method_id,
$context,
$statements_analyzer->getSource(),
$name_code_location,
$statements_analyzer->getSuppressedIssues()
) === false) {
return false;
}
}
if (MethodAnalyzer::checkMethodNotDeprecatedOrInternal(
$codebase,
$context,
$method_id,
$name_code_location,
$statements_analyzer->getSuppressedIssues()
) === false) {
return false;
}
if (!self::checkMagicGetterOrSetterProperty(
$statements_analyzer,
$stmt,
$context,
$fq_class_name
)) {
return false;
}
$self_fq_class_name = $fq_class_name;
$return_type_candidate = $codebase->methods->getMethodReturnType(
$method_id,
$self_fq_class_name,
$args
);
if ($codebase->store_node_types && $method_id) {
$codebase->analyzer->addNodeReference(
$statements_analyzer->getFilePath(),
$stmt->name,
$method_id . '()'
);
}
if (isset($stmt->inferredType)) {
$return_type_candidate = $stmt->inferredType;
}
if ($return_type_candidate) {
$return_type_candidate = clone $return_type_candidate;
if ($class_template_params) {
$return_type_candidate->replaceTemplateTypesWithArgTypes(
$class_template_params,
$codebase
);
}
$return_type_candidate = ExpressionAnalyzer::fleshOutType(
$codebase,
$return_type_candidate,
$self_fq_class_name,
$static_type,
$class_storage->parent_class
);
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$return_type_location = $codebase->methods->getMethodReturnTypeLocation(
$method_id,
$secondary_return_type_location
);
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if ($secondary_return_type_location) {
$return_type_location = $secondary_return_type_location;
}
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// only check the type locally if it's defined externally
if ($return_type_location && !$config->isInProjectDirs($return_type_location->file_path)) {
$return_type_candidate->check(
$statements_analyzer,
new CodeLocation($source, $stmt),
$statements_analyzer->getSuppressedIssues(),
$context->phantom_classes
);
}
} else {
$returns_by_ref =
$returns_by_ref
|| $codebase->methods->getMethodReturnsByRef($method_id);
}
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$method_storage = $codebase->methods->getUserMethodStorage($method_id);
if ($method_storage) {
if ($method_storage->assertions) {
self::applyAssertionsToContext(
$stmt->name,
$method_storage->assertions,
$args,
$class_template_params ?: [],
$context,
$statements_analyzer
);
}
if ($method_storage->if_true_assertions) {
$stmt->ifTrueAssertions = array_map(
function (Assertion $assertion) use ($class_template_params) : Assertion {
return $assertion->getUntemplatedCopy($class_template_params ?: []);
},
$method_storage->if_true_assertions
);
}
if ($method_storage->if_false_assertions) {
$stmt->ifFalseAssertions = array_map(
function (Assertion $assertion) use ($class_template_params) : Assertion {
return $assertion->getUntemplatedCopy($class_template_params ?: []);
},
$method_storage->if_false_assertions
);
}
}
}
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}
}
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if (!$args && $lhs_var_id) {
if ($config->memoize_method_calls) {
$method_var_id = $lhs_var_id . '->' . $method_name_lc . '()';
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if (isset($context->vars_in_scope[$method_var_id])) {
$return_type_candidate = clone $context->vars_in_scope[$method_var_id];
} elseif ($return_type_candidate) {
$context->vars_in_scope[$method_var_id] = $return_type_candidate;
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}
}
}
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if ($codebase->methods_to_rename) {
$declaring_method_id = $codebase->methods->getDeclaringMethodId($method_id);
foreach ($codebase->methods_to_rename as $original_method_id => $new_method_name) {
if ($declaring_method_id && strtolower($declaring_method_id) === $original_method_id) {
$file_manipulations = [
new \Psalm\FileManipulation(
(int) $stmt->name->getAttribute('startFilePos'),
(int) $stmt->name->getAttribute('endFilePos') + 1,
$new_method_name
)
];
\Psalm\Internal\FileManipulation\FileManipulationBuffer::add(
$statements_analyzer->getFilePath(),
$file_manipulations
);
}
}
}
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if ($config->after_method_checks) {
$file_manipulations = [];
$appearing_method_id = $codebase->methods->getAppearingMethodId($method_id);
$declaring_method_id = $codebase->methods->getDeclaringMethodId($method_id);
if ($appearing_method_id && $declaring_method_id) {
foreach ($config->after_method_checks as $plugin_fq_class_name) {
$plugin_fq_class_name::afterMethodCallAnalysis(
$stmt,
$method_id,
$appearing_method_id,
$declaring_method_id,
$context,
$source,
$codebase,
$file_manipulations,
$return_type_candidate
);
}
}
if ($file_manipulations) {
/** @psalm-suppress MixedTypeCoercion */
FileManipulationBuffer::add($statements_analyzer->getFilePath(), $file_manipulations);
}
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}
if ($return_type_candidate) {
if ($all_intersection_return_type) {
$return_type_candidate = Type::intersectUnionTypes(
$all_intersection_return_type,
$return_type_candidate
);
}
if (!$return_type) {
$return_type = $return_type_candidate;
} else {
$return_type = Type::combineUnionTypes($return_type_candidate, $return_type);
}
} elseif ($all_intersection_return_type) {
if (!$return_type) {
$return_type = $all_intersection_return_type;
} else {
$return_type = Type::combineUnionTypes($all_intersection_return_type, $return_type);
}
} else {
$return_type = Type::getMixed();
}
}
/**
2019-03-22 23:02:33 +01:00
* @return array<string, array<string, array{Type\Union, 1?:int}>>|null
*/
public static function getClassTemplateParams(
Codebase $codebase,
ClassLikeStorage $class_storage,
string $fq_class_name,
string $method_name = null,
Type\Atomic $lhs_type_part = null,
string $lhs_var_id = null
) {
$calling_class_storage = $codebase->classlike_storage_provider->get($fq_class_name);
$template_types = $class_storage->template_types;
if ($calling_class_storage->template_type_extends
&& $method_name
&& !empty($class_storage->overridden_method_ids[$method_name])
&& isset($class_storage->methods[$method_name])
&& (!isset($class_storage->methods[$method_name]->return_type)
|| $class_storage->methods[$method_name]->inherited_return_type)
) {
foreach ($class_storage->overridden_method_ids[$method_name] as $overridden_method_id) {
$overridden_storage = $codebase->methods->getStorage($overridden_method_id);
if (!$overridden_storage->return_type) {
return null;
}
if ($overridden_storage->return_type->isNull()) {
return null;
}
list($fq_overridden_class) = explode('::', $overridden_method_id);
$overridden_class_storage = $codebase->classlike_storage_provider->get($fq_overridden_class);
if (!$template_types) {
$template_types = $overridden_class_storage->template_types;
} elseif ($overridden_class_storage->template_types) {
$template_types = array_merge($overridden_class_storage->template_types, $template_types);
}
$class_storage = $overridden_class_storage;
}
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}
if (!$template_types) {
return null;
}
$class_template_params = [];
$e = $calling_class_storage->template_type_extends;
if ($lhs_type_part instanceof TGenericObject) {
if ($calling_class_storage->template_types && $class_storage === $calling_class_storage) {
$i = 0;
foreach ($calling_class_storage->template_types as $type_name => $_) {
if (isset($lhs_type_part->type_params[$i])) {
$class_template_params[$type_name][$calling_class_storage->name] = [
2019-03-22 23:02:33 +01:00
$lhs_type_part->type_params[$i]
];
}
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$i++;
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}
}
$i = 0;
foreach ($template_types as $type_name => $_) {
if (isset($class_template_params[$type_name])) {
$i++;
continue;
}
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if ($class_storage !== $calling_class_storage
&& isset($e[strtolower($class_storage->name)][$type_name])
) {
$input_type_extends = $e[strtolower($class_storage->name)][$type_name];
$output_type_extends = null;
foreach ($input_type_extends->getTypes() as $type_extends_atomic) {
if ($type_extends_atomic instanceof Type\Atomic\TTemplateParam) {
if (isset($calling_class_storage->template_types[$type_extends_atomic->param_name])) {
$mapped_offset = array_search(
$type_extends_atomic->param_name,
array_keys($calling_class_storage->template_types)
);
if (isset($lhs_type_part->type_params[(int) $mapped_offset])) {
$candidate_type = $lhs_type_part->type_params[(int) $mapped_offset];
if (!$output_type_extends) {
$output_type_extends = $candidate_type;
} else {
$output_type_extends = Type::combineUnionTypes(
$candidate_type,
$output_type_extends
);
}
}
} elseif ($type_extends_atomic->defining_class
&& isset(
$calling_class_storage
->template_type_extends
[strtolower($type_extends_atomic->defining_class)]
[$type_extends_atomic->param_name]
)
) {
$mapped_offset = array_search(
$type_extends_atomic->param_name,
array_keys($calling_class_storage
2019-01-13 00:18:23 +01:00
->template_type_extends
[strtolower($type_extends_atomic->defining_class)])
);
if (isset($lhs_type_part->type_params[(int) $mapped_offset])) {
$candidate_type = $lhs_type_part->type_params[(int) $mapped_offset];
if (!$output_type_extends) {
$output_type_extends = $candidate_type;
} else {
$output_type_extends = Type::combineUnionTypes(
$candidate_type,
$output_type_extends
);
}
}
}
} else {
if (!$output_type_extends) {
$output_type_extends = new Type\Union([$type_extends_atomic]);
} else {
$output_type_extends = Type::combineUnionTypes(
new Type\Union([$type_extends_atomic]),
$output_type_extends
);
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}
}
}
$class_template_params[$type_name][$class_storage->name] = [
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$output_type_extends ?: Type::getMixed()
];
}
if (!isset($class_template_params[$type_name])) {
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$class_template_params[$type_name][$class_storage->name] = [Type::getMixed()];
}
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$i++;
}
} else {
foreach ($template_types as $type_name => $type_map) {
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foreach ($type_map as list($type)) {
if ($class_storage !== $calling_class_storage
&& isset($e[strtolower($class_storage->name)][$type_name])
) {
$input_type_extends = $e[strtolower($class_storage->name)][$type_name];
$output_type_extends = null;
foreach ($input_type_extends->getTypes() as $type_extends_atomic) {
if ($type_extends_atomic instanceof Type\Atomic\TTemplateParam) {
if (!$output_type_extends) {
$output_type_extends = $type_extends_atomic->as;
} else {
$output_type_extends = Type::combineUnionTypes(
$type_extends_atomic->as,
$output_type_extends
);
}
} else {
if (!$output_type_extends) {
$output_type_extends = new Type\Union([$type_extends_atomic]);
} else {
$output_type_extends = Type::combineUnionTypes(
new Type\Union([$type_extends_atomic]),
$output_type_extends
);
}
}
}
$class_template_params[$type_name][$class_storage->name] = [
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$output_type_extends ?: Type::getMixed()
];
}
if ($lhs_var_id !== '$this') {
if (!isset($class_template_params[$type_name])) {
2019-03-22 23:02:33 +01:00
$class_template_params[$type_name][$class_storage->name] = [$type];
}
}
}
}
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}
return $class_template_params;
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}
/**
* Check properties accessed with magic getters and setters.
* If `@psalm-seal-properties` is set, they must be defined.
* If an `@property` annotation is specified, the setter must set something with the correct
* type.
*
2018-11-11 18:01:14 +01:00
* @param StatementsAnalyzer $statements_analyzer
* @param PhpParser\Node\Expr\MethodCall $stmt
* @param string $fq_class_name
*
* @return bool
*/
private static function checkMagicGetterOrSetterProperty(
2018-11-11 18:01:14 +01:00
StatementsAnalyzer $statements_analyzer,
PhpParser\Node\Expr\MethodCall $stmt,
Context $context,
$fq_class_name
) {
if (!$stmt->name instanceof PhpParser\Node\Identifier) {
return true;
}
$method_name = strtolower($stmt->name->name);
if (!in_array($method_name, ['__get', '__set'], true)) {
return true;
}
$codebase = $statements_analyzer->getCodebase();
$first_arg_value = $stmt->args[0]->value;
if (!$first_arg_value instanceof PhpParser\Node\Scalar\String_) {
return true;
}
$prop_name = $first_arg_value->value;
$property_id = $fq_class_name . '::$' . $prop_name;
2018-11-06 03:57:36 +01:00
$class_storage = $codebase->classlike_storage_provider->get($fq_class_name);
$codebase->properties->propertyExists(
$property_id,
$method_name === '__get',
$statements_analyzer,
$context,
new CodeLocation($statements_analyzer->getSource(), $stmt)
);
switch ($method_name) {
case '__set':
// If `@psalm-seal-properties` is set, the property must be defined with
// a `@property` annotation
if ($class_storage->sealed_properties
&& !isset($class_storage->pseudo_property_set_types['$' . $prop_name])
&& IssueBuffer::accepts(
new UndefinedThisPropertyAssignment(
'Instance property ' . $property_id . ' is not defined',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)
) {
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// fall through
}
// If a `@property` annotation is set, the type of the value passed to the
// magic setter must match the annotation.
$second_arg_type = isset($stmt->args[1]->value->inferredType)
? $stmt->args[1]->value->inferredType
: null;
if (isset($class_storage->pseudo_property_set_types['$' . $prop_name]) && $second_arg_type) {
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$pseudo_set_type = ExpressionAnalyzer::fleshOutType(
$codebase,
$class_storage->pseudo_property_set_types['$' . $prop_name],
$fq_class_name,
new Type\Atomic\TNamedObject($fq_class_name),
$class_storage->parent_class
);
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$type_match_found = TypeAnalyzer::isContainedBy(
$codebase,
$second_arg_type,
$pseudo_set_type,
$second_arg_type->ignore_nullable_issues,
$second_arg_type->ignore_falsable_issues,
$has_scalar_match,
$type_coerced,
$type_coerced_from_mixed,
$to_string_cast
);
if ($type_coerced) {
if ($type_coerced_from_mixed) {
if (IssueBuffer::accepts(
new MixedPropertyTypeCoercion(
$prop_name . ' expects \'' . $pseudo_set_type . '\', '
. ' parent type `' . $second_arg_type . '` provided',
new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)) {
// keep soldiering on
}
} else {
if (IssueBuffer::accepts(
new PropertyTypeCoercion(
$prop_name . ' expects \'' . $pseudo_set_type . '\', '
. ' parent type `' . $second_arg_type . '` provided',
new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)) {
// keep soldiering on
}
}
}
if (!$type_match_found && !$type_coerced_from_mixed) {
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if (TypeAnalyzer::canBeContainedBy(
$codebase,
$second_arg_type,
$pseudo_set_type
)) {
if (IssueBuffer::accepts(
new PossiblyInvalidPropertyAssignmentValue(
$prop_name . ' with declared type \''
. $pseudo_set_type
. '\' cannot be assigned possibly different type \'' . $second_arg_type . '\'',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)) {
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// fall through
}
} else {
if (IssueBuffer::accepts(
new InvalidPropertyAssignmentValue(
$prop_name . ' with declared type \''
. $pseudo_set_type
. '\' cannot be assigned type \'' . $second_arg_type . '\'',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)) {
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// fall through
}
}
}
}
break;
case '__get':
// If `@psalm-seal-properties` is set, the property must be defined with
// a `@property` annotation
if ($class_storage->sealed_properties
&& !isset($class_storage->pseudo_property_get_types['$' . $prop_name])
&& IssueBuffer::accepts(
new UndefinedThisPropertyFetch(
'Instance property ' . $property_id . ' is not defined',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
$property_id
),
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$statements_analyzer->getSuppressedIssues()
)
) {
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// fall through
}
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if (isset($class_storage->pseudo_property_get_types['$' . $prop_name])) {
$stmt->inferredType = clone $class_storage->pseudo_property_get_types['$' . $prop_name];
}
break;
}
return true;
}
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}