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CallAnalyzer.php
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CallAnalyzer.php
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<?php
namespace Psalm\Internal\Analyzer\Statements\Expression;
use PhpParser;
use PhpParser\Node\Identifier;
use PhpParser\Node\Name;
use Psalm\CodeLocation;
use Psalm\Codebase;
use Psalm\Context;
use Psalm\FileSource;
use Psalm\Internal\Algebra;
use Psalm\Internal\Algebra\FormulaGenerator;
use Psalm\Internal\Analyzer\ClassLikeAnalyzer;
use Psalm\Internal\Analyzer\FunctionLikeAnalyzer;
use Psalm\Internal\Analyzer\Statements\Expression\Call\ArgumentsAnalyzer;
use Psalm\Internal\Analyzer\StatementsAnalyzer;
use Psalm\Internal\Analyzer\TraitAnalyzer;
use Psalm\Internal\MethodIdentifier;
use Psalm\Internal\Type\Comparator\TypeComparisonResult;
use Psalm\Internal\Type\Comparator\UnionTypeComparator;
use Psalm\Internal\Type\TemplateBound;
use Psalm\Internal\Type\TemplateInferredTypeReplacer;
use Psalm\Internal\Type\TemplateResult;
use Psalm\Internal\Type\TemplateStandinTypeReplacer;
use Psalm\Internal\Type\TypeExpander;
use Psalm\Issue\ArgumentTypeCoercion;
use Psalm\Issue\InvalidArgument;
use Psalm\Issue\InvalidDocblock;
use Psalm\Issue\InvalidScalarArgument;
use Psalm\Issue\MixedArgumentTypeCoercion;
use Psalm\Issue\TypeDoesNotContainType;
use Psalm\Issue\UndefinedFunction;
use Psalm\IssueBuffer;
use Psalm\Node\Expr\BinaryOp\VirtualIdentical;
use Psalm\Node\Expr\VirtualConstFetch;
use Psalm\Node\VirtualName;
use Psalm\Storage\Assertion\Falsy;
use Psalm\Storage\Assertion\IsIdentical;
use Psalm\Storage\Assertion\IsType;
use Psalm\Storage\Assertion\Truthy;
use Psalm\Storage\ClassLikeStorage;
use Psalm\Storage\Possibilities;
use Psalm\Type;
use Psalm\Type\Atomic\TNamedObject;
use Psalm\Type\Atomic\TObjectWithProperties;
use Psalm\Type\Atomic\TTemplateParam;
use Psalm\Type\Atomic\TTrue;
use Psalm\Type\Reconciler;
use Psalm\Type\Union;
use UnexpectedValueException;
use function array_filter;
use function array_map;
use function array_merge;
use function array_unique;
use function count;
use function explode;
use function implode;
use function in_array;
use function is_int;
use function is_numeric;
use function mt_rand;
use function preg_match;
use function preg_replace;
use function spl_object_id;
use function str_replace;
use function strpos;
use function strtolower;
/**
* @internal
*/
class CallAnalyzer
{
public static function collectSpecialInformation(
FunctionLikeAnalyzer $source,
string $method_name,
Context $context
): void {
$method_name_lc = strtolower($method_name);
$fq_class_name = (string)$source->getFQCLN();
$project_analyzer = $source->getFileAnalyzer()->project_analyzer;
$codebase = $source->getCodebase();
if ($context->collect_mutations &&
$context->self &&
(
$context->self === $fq_class_name ||
$codebase->classExtends(
$context->self,
$fq_class_name
)
)
) {
$method_id = new MethodIdentifier(
$fq_class_name,
$method_name_lc
);
if ((string) $method_id !== $source->getId()) {
if ($context->collect_initializations) {
if (isset($context->initialized_methods[(string) $method_id])) {
return;
}
if ($context->initialized_methods === null) {
$context->initialized_methods = [];
}
$context->initialized_methods[(string) $method_id] = true;
}
$project_analyzer->getMethodMutations(
$method_id,
$context,
$source->getRootFilePath(),
$source->getRootFileName()
);
}
} elseif ($context->collect_initializations &&
$context->self &&
(
$context->self === $fq_class_name
|| $codebase->classlikes->classExtends(
$context->self,
$fq_class_name
)
) &&
$source->getMethodName() !== $method_name
) {
$method_id = new MethodIdentifier($fq_class_name, $method_name_lc);
$declaring_method_id = $codebase->methods->getDeclaringMethodId($method_id);
if (isset($context->vars_in_scope['$this'])) {
foreach ($context->vars_in_scope['$this']->getAtomicTypes() as $atomic_type) {
if ($atomic_type instanceof TNamedObject) {
if ($fq_class_name === $atomic_type->value) {
$alt_declaring_method_id = $declaring_method_id;
} else {
$fq_class_name = $atomic_type->value;
$method_id = new MethodIdentifier(
$fq_class_name,
$method_name_lc
);
$alt_declaring_method_id = $codebase->methods->getDeclaringMethodId($method_id);
}
if ($alt_declaring_method_id) {
$declaring_method_id = $alt_declaring_method_id;
break;
}
if (!$atomic_type->extra_types) {
continue;
}
foreach ($atomic_type->extra_types as $intersection_type) {
if ($intersection_type instanceof TNamedObject) {
$fq_class_name = $intersection_type->value;
$method_id = new MethodIdentifier(
$fq_class_name,
$method_name_lc
);
$alt_declaring_method_id = $codebase->methods->getDeclaringMethodId($method_id);
if ($alt_declaring_method_id) {
$declaring_method_id = $alt_declaring_method_id;
break 2;
}
}
}
}
}
}
if (!$declaring_method_id) {
// can happen for __call
return;
}
if (isset($context->initialized_methods[(string) $declaring_method_id])) {
return;
}
if ($context->initialized_methods === null) {
$context->initialized_methods = [];
}
$context->initialized_methods[(string) $declaring_method_id] = true;
$method_storage = $codebase->methods->getStorage($declaring_method_id);
$class_analyzer = $source->getSource();
$is_final = $method_storage->final;
if ($method_name !== $declaring_method_id->method_name) {
$appearing_method_id = $codebase->methods->getAppearingMethodId($method_id);
if ($appearing_method_id) {
$appearing_class_storage = $codebase->classlike_storage_provider->get(
$appearing_method_id->fq_class_name
);
if (isset($appearing_class_storage->trait_final_map[$method_name_lc])) {
$is_final = true;
}
}
}
if ($class_analyzer instanceof ClassLikeAnalyzer
&& !$method_storage->is_static
&& ($context->collect_nonprivate_initializations
|| $method_storage->visibility === ClassLikeAnalyzer::VISIBILITY_PRIVATE
|| $is_final)
) {
$local_vars_in_scope = [];
foreach ($context->vars_in_scope as $var_id => $type) {
if (strpos($var_id, '$this->') === 0) {
if ($type->initialized) {
$local_vars_in_scope[$var_id] = $context->vars_in_scope[$var_id];
$context->remove($var_id, false);
}
} elseif ($var_id !== '$this') {
$local_vars_in_scope[$var_id] = $context->vars_in_scope[$var_id];
}
}
$local_vars_possibly_in_scope = $context->vars_possibly_in_scope;
$old_calling_method_id = $context->calling_method_id;
if ($fq_class_name === $source->getFQCLN()) {
$class_analyzer->getMethodMutations($declaring_method_id->method_name, $context);
} else {
$declaring_fq_class_name = $declaring_method_id->fq_class_name;
$old_self = $context->self;
$context->self = $declaring_fq_class_name;
$project_analyzer->getMethodMutations(
$declaring_method_id,
$context,
$source->getRootFilePath(),
$source->getRootFileName()
);
$context->self = $old_self;
}
$context->calling_method_id = $old_calling_method_id;
foreach ($local_vars_in_scope as $var => $type) {
$context->vars_in_scope[$var] = $type;
}
foreach ($local_vars_possibly_in_scope as $var => $_) {
$context->vars_possibly_in_scope[$var] = true;
}
}
}
}
/**
* @param list<PhpParser\Node\Arg> $args
*/
public static function checkMethodArgs(
?MethodIdentifier $method_id,
array $args,
TemplateResult $template_result,
Context $context,
CodeLocation $code_location,
StatementsAnalyzer $statements_analyzer
): bool {
$codebase = $statements_analyzer->getCodebase();
if (!$method_id) {
return ArgumentsAnalyzer::analyze(
$statements_analyzer,
$args,
null,
null,
true,
$context,
$template_result
) !== false;
}
$method_params = $codebase->methods->getMethodParams($method_id, $statements_analyzer, $args, $context);
$fq_class_name = $method_id->fq_class_name;
$method_name = $method_id->method_name;
$fq_class_name = strtolower($codebase->classlikes->getUnAliasedName($fq_class_name));
$class_storage = $codebase->classlike_storage_provider->get($fq_class_name);
$method_storage = null;
if (isset($class_storage->declaring_method_ids[$method_name])) {
$declaring_method_id = $class_storage->declaring_method_ids[$method_name];
$declaring_fq_class_name = $declaring_method_id->fq_class_name;
$declaring_method_name = $declaring_method_id->method_name;
if ($declaring_fq_class_name !== $fq_class_name) {
$declaring_class_storage = $codebase->classlike_storage_provider->get($declaring_fq_class_name);
} else {
$declaring_class_storage = $class_storage;
}
if (!isset($declaring_class_storage->methods[$declaring_method_name])) {
throw new UnexpectedValueException('Storage should not be empty here');
}
$method_storage = $declaring_class_storage->methods[$declaring_method_name];
if ($declaring_class_storage->user_defined
&& !$method_storage->has_docblock_param_types
&& isset($declaring_class_storage->documenting_method_ids[$method_name])
) {
$documenting_method_id = $declaring_class_storage->documenting_method_ids[$method_name];
$documenting_method_storage = $codebase->methods->getStorage($documenting_method_id);
if ($documenting_method_storage->template_types) {
$method_storage = $documenting_method_storage;
}
}
if (!$context->isSuppressingExceptions($statements_analyzer)) {
$context->mergeFunctionExceptions($method_storage, $code_location);
}
}
if (ArgumentsAnalyzer::analyze(
$statements_analyzer,
$args,
$method_params,
(string) $method_id,
$method_storage->allow_named_arg_calls ?? true,
$context,
$template_result
) === false) {
return false;
}
if (ArgumentsAnalyzer::checkArgumentsMatch(
$statements_analyzer,
$args,
$method_id,
$method_params,
$method_storage,
$class_storage,
$template_result,
$code_location,
$context
) === false) {
return false;
}
if ($template_result->template_types) {
self::checkTemplateResult(
$statements_analyzer,
$template_result,
$code_location,
strtolower((string) $method_id)
);
}
return true;
}
/**
* This gets all the template params (and their types) that we think
* we'll need to know about
*
* @return array<string, array<string, Union>>
* @param array<string, non-empty-array<string, Union>> $existing_template_types
* @param array<string, array<string, Union>> $class_template_params
*/
public static function getTemplateTypesForCall(
Codebase $codebase,
?ClassLikeStorage $declaring_class_storage,
?string $appearing_class_name,
?ClassLikeStorage $calling_class_storage,
array $existing_template_types = [],
array $class_template_params = []
): array {
$template_types = $existing_template_types;
if ($declaring_class_storage) {
if ($calling_class_storage
&& $declaring_class_storage !== $calling_class_storage
&& $calling_class_storage->template_extended_params
) {
foreach ($calling_class_storage->template_extended_params as $class_name => $type_map) {
foreach ($type_map as $template_name => $type) {
if ($class_name === $declaring_class_storage->name) {
$output_type = null;
foreach ($type->getAtomicTypes() as $atomic_type) {
if ($atomic_type instanceof TTemplateParam) {
$output_type_candidate = self::getGenericParamForOffset(
$atomic_type->defining_class,
$atomic_type->param_name,
$calling_class_storage->template_extended_params,
$class_template_params + $template_types
);
} else {
$output_type_candidate = new Union([$atomic_type]);
}
$output_type = Type::combineUnionTypes(
$output_type_candidate,
$output_type
);
}
$template_types[$template_name][$declaring_class_storage->name] = $output_type;
}
}
}
} elseif ($declaring_class_storage->template_types) {
foreach ($declaring_class_storage->template_types as $template_name => $type_map) {
foreach ($type_map as $key => $type) {
$template_types[$template_name][$key]
= $class_template_params[$template_name][$key] ?? $type;
}
}
}
}
foreach ($template_types as $key => $type_map) {
foreach ($type_map as $class => $type) {
$template_types[$key][$class] = TypeExpander::expandUnion(
$codebase,
$type,
$appearing_class_name,
$calling_class_storage->name ?? null,
null,
true,
false,
$calling_class_storage->final ?? false
);
}
}
return $template_types;
}
/**
* @param array<string, array<string, Union>> $template_extended_params
* @param array<string, array<string, Union>> $found_generic_params
*/
public static function getGenericParamForOffset(
string $fq_class_name,
string $template_name,
array $template_extended_params,
array $found_generic_params
): Union {
if (isset($found_generic_params[$template_name][$fq_class_name])) {
return $found_generic_params[$template_name][$fq_class_name];
}
foreach ($template_extended_params as $extended_class_name => $type_map) {
foreach ($type_map as $extended_template_name => $extended_type) {
foreach ($extended_type->getAtomicTypes() as $extended_atomic_type) {
if ($extended_atomic_type instanceof TTemplateParam
&& $extended_atomic_type->param_name === $template_name
&& $extended_atomic_type->defining_class === $fq_class_name
) {
return self::getGenericParamForOffset(
$extended_class_name,
$extended_template_name,
$template_extended_params,
$found_generic_params
);
}
}
}
}
return Type::getMixed();
}
/**
* @param PhpParser\Node\Scalar\String_|PhpParser\Node\Expr\Array_|PhpParser\Node\Expr\BinaryOp\Concat $callable_arg
*
* @return list<non-empty-string>
*
* @psalm-suppress LessSpecificReturnStatement
* @psalm-suppress MoreSpecificReturnType
*/
public static function getFunctionIdsFromCallableArg(
FileSource $file_source,
PhpParser\Node\Expr $callable_arg
): array {
if ($callable_arg instanceof PhpParser\Node\Expr\BinaryOp\Concat) {
if ($callable_arg->left instanceof PhpParser\Node\Expr\ClassConstFetch
&& $callable_arg->left->class instanceof Name
&& $callable_arg->left->name instanceof Identifier
&& strtolower($callable_arg->left->name->name) === 'class'
&& !in_array(strtolower($callable_arg->left->class->parts[0]), ['self', 'static', 'parent'])
&& $callable_arg->right instanceof PhpParser\Node\Scalar\String_
&& preg_match('/^::[A-Za-z0-9]+$/', $callable_arg->right->value)
) {
return [
(string) $callable_arg->left->class->getAttribute('resolvedName') . $callable_arg->right->value
];
}
return [];
}
if ($callable_arg instanceof PhpParser\Node\Scalar\String_) {
$potential_id = preg_replace('/^\\\/', '', $callable_arg->value);
if (preg_match('/^[A-Za-z0-9_]+(\\\[A-Za-z0-9_]+)*(::[A-Za-z0-9_]+)?$/', $potential_id)) {
return [$potential_id];
}
return [];
}
if (count($callable_arg->items) !== 2) {
return [];
}
/** @psalm-suppress PossiblyNullPropertyFetch */
if ($callable_arg->items[0]->key || $callable_arg->items[1]->key) {
return [];
}
if (!isset($callable_arg->items[0]) || !isset($callable_arg->items[1])) {
throw new UnexpectedValueException('These should never be unset');
}
$class_arg = $callable_arg->items[0]->value;
$method_name_arg = $callable_arg->items[1]->value;
if (!$method_name_arg instanceof PhpParser\Node\Scalar\String_) {
return [];
}
if ($class_arg instanceof PhpParser\Node\Scalar\String_) {
return [preg_replace('/^\\\/', '', $class_arg->value) . '::' . $method_name_arg->value];
}
if ($class_arg instanceof PhpParser\Node\Expr\ClassConstFetch
&& $class_arg->name instanceof Identifier
&& strtolower($class_arg->name->name) === 'class'
&& $class_arg->class instanceof Name
) {
$fq_class_name = ClassLikeAnalyzer::getFQCLNFromNameObject(
$class_arg->class,
$file_source->getAliases()
);
return [$fq_class_name . '::' . $method_name_arg->value];
}
if (!$file_source instanceof StatementsAnalyzer
|| !($class_arg_type = $file_source->node_data->getType($class_arg))
) {
return [];
}
$method_ids = [];
foreach ($class_arg_type->getAtomicTypes() as $type_part) {
if ($type_part instanceof TNamedObject) {
$method_id = $type_part->value . '::' . $method_name_arg->value;
if ($type_part->extra_types) {
foreach ($type_part->extra_types as $extra_type) {
if ($extra_type instanceof TTemplateParam
|| $extra_type instanceof TObjectWithProperties
) {
throw new UnexpectedValueException('Shouldn’t get a generic param here');
}
$method_id .= '&' . $extra_type->value . '::' . $method_name_arg->value;
}
}
$method_ids[] = '$' . $method_id;
}
}
return $method_ids;
}
/**
* @param non-empty-string $function_id
* @param bool $can_be_in_root_scope if true, the function can be shortened to the root version
*
*/
public static function checkFunctionExists(
StatementsAnalyzer $statements_analyzer,
string &$function_id,
CodeLocation $code_location,
bool $can_be_in_root_scope
): bool {
$cased_function_id = $function_id;
$function_id = strtolower($function_id);
$codebase = $statements_analyzer->getCodebase();
if (!$codebase->functions->functionExists($statements_analyzer, $function_id)) {
/** @var non-empty-lowercase-string */
$root_function_id = preg_replace('/.*\\\/', '', $function_id);
if ($can_be_in_root_scope
&& $function_id !== $root_function_id
&& $codebase->functions->functionExists($statements_analyzer, $root_function_id)
) {
$function_id = $root_function_id;
} else {
IssueBuffer::maybeAdd(
new UndefinedFunction(
'Function ' . $cased_function_id . ' does not exist',
$code_location,
$function_id
),
$statements_analyzer->getSuppressedIssues()
);
return false;
}
}
return true;
}
/**
* @param Identifier|Name $expr
* @param Possibilities[] $var_assertions
* @param list<PhpParser\Node\Arg> $args
*
*/
public static function applyAssertionsToContext(
PhpParser\NodeAbstract $expr,
?string $thisName,
array $var_assertions,
array $args,
TemplateResult $template_result,
Context $context,
StatementsAnalyzer $statements_analyzer
): void {
$type_assertions = [];
$asserted_keys = [];
foreach ($var_assertions as $var_possibilities) {
$assertion_var_id = null;
$arg_value = null;
if (is_int($var_possibilities->var_id)) {
if (!isset($args[$var_possibilities->var_id])) {
continue;
}
$arg_value = $args[$var_possibilities->var_id]->value;
$arg_var_id = ExpressionIdentifier::getExtendedVarId($arg_value, null, $statements_analyzer);
if ($arg_var_id) {
$assertion_var_id = $arg_var_id;
}
} elseif ($var_possibilities->var_id === '$this' && $thisName !== null) {
$assertion_var_id = $thisName;
} elseif (strpos($var_possibilities->var_id, '$this->') === 0 && $thisName !== null) {
$assertion_var_id = $thisName . str_replace('$this->', '->', $var_possibilities->var_id);
} elseif (strpos($var_possibilities->var_id, 'self::') === 0 && $context->self) {
$assertion_var_id = $context->self . str_replace('self::', '::', $var_possibilities->var_id);
} elseif (strpos($var_possibilities->var_id, '::$') !== false) {
// allow assertions to bring external static props into scope
$assertion_var_id = $var_possibilities->var_id;
} elseif (isset($context->vars_in_scope[$var_possibilities->var_id])) {
$assertion_var_id = $var_possibilities->var_id;
} elseif (strpos($var_possibilities->var_id, '->') !== false) {
$exploded = explode('->', $var_possibilities->var_id);
if (count($exploded) < 2) {
IssueBuffer::add(
new InvalidDocblock(
'Assert notation is malformed',
new CodeLocation($statements_analyzer, $expr)
)
);
continue;
}
[$var_id, $property] = $exploded;
$var_id = is_numeric($var_id) ? (int) $var_id : $var_id;
if (!is_int($var_id) || !isset($args[$var_id])) {
IssueBuffer::add(
new InvalidDocblock(
'Variable ' . $var_id . ' is not an argument so cannot be asserted',
new CodeLocation($statements_analyzer, $expr)
)
);
continue;
}
/** @var PhpParser\Node\Expr\Variable $arg_value */
$arg_value = $args[$var_id]->value;
$arg_var_id = ExpressionIdentifier::getExtendedVarId($arg_value, null, $statements_analyzer);
if (!$arg_var_id) {
IssueBuffer::add(
new InvalidDocblock(
'Variable being asserted as argument ' . ($var_id+1) . ' cannot be found in local scope',
new CodeLocation($statements_analyzer, $expr)
)
);
continue;
}
if (count($exploded) === 2) {
$failedMessage = AssertionFinder::isPropertyImmutableOnArgument(
$property,
$statements_analyzer->getNodeTypeProvider(),
$statements_analyzer->getCodebase()->classlike_storage_provider,
$arg_value
);
if (null !== $failedMessage) {
IssueBuffer::add(
new InvalidDocblock($failedMessage, new CodeLocation($statements_analyzer, $expr))
);
continue;
}
}
$assertion_var_id = str_replace((string) $var_id, $arg_var_id, $var_possibilities->var_id);
}
$codebase = $statements_analyzer->getCodebase();
if ($assertion_var_id) {
$orred_rules = [];
foreach ($var_possibilities->rule as $assertion_rule) {
$assertion_type = $assertion_rule->getAtomicType();
if ($assertion_type) {
$union = new Union([clone $assertion_type]);
TemplateInferredTypeReplacer::replace(
$union,
$template_result,
$codebase
);
if ($union->isSingle()) {
foreach ($union->getAtomicTypes() as $atomic_type) {
if ($assertion_type instanceof TTemplateParam
&& $assertion_type->as->getId() === $atomic_type->getId()
) {
continue;
}
$assertion_rule = clone $assertion_rule;
$assertion_rule->setAtomicType($atomic_type);
$orred_rules[] = $assertion_rule;
}
} elseif (isset($context->vars_in_scope[$var_possibilities->var_id])) {
$other_type = $context->vars_in_scope[$var_possibilities->var_id];
if ($assertion_rule instanceof IsIdentical
|| $assertion_rule instanceof IsType
) {
if (!UnionTypeComparator::canExpressionTypesBeIdentical(
$codebase,
$union,
$context->vars_in_scope[$var_possibilities->var_id]
)) {
IssueBuffer::maybeAdd(
new TypeDoesNotContainType(
$union->getId() . ' cannot be identical to ' . $other_type->getId(),
new CodeLocation($statements_analyzer->getSource(), $expr),
$union->getId() . ' ' . $other_type->getId()
),
$statements_analyzer->getSuppressedIssues()
);
}
}
} elseif (isset($context->vars_in_scope[$assertion_var_id])) {
$other_type = $context->vars_in_scope[$assertion_var_id];
$union = self::createUnionIntersectionFromOldType($union, $other_type);
if ($union !== null) {
foreach ($union->getAtomicTypes() as $atomic_type) {
if ($assertion_type instanceof TTemplateParam
&& $assertion_type->as->getId() === $atomic_type->getId()
) {
continue;
}
$assertion_rule = clone $assertion_rule;
$assertion_rule->setAtomicType($atomic_type);
$orred_rules[] = $assertion_rule;
}
}
}
} else {
$orred_rules[] = $assertion_rule;
}
}
if ($orred_rules) {
if (isset($type_assertions[$assertion_var_id])) {
$type_assertions[$assertion_var_id] = array_merge(
$type_assertions[$assertion_var_id],
[$orred_rules]
);
} else {
$type_assertions[$assertion_var_id] = [$orred_rules];
}
}
} elseif ($arg_value
&& count($var_possibilities->rule) === 1
) {
$assert_clauses = [];
$single_rule = $var_possibilities->rule[0];
if ($single_rule instanceof Truthy) {
$assert_clauses = FormulaGenerator::getFormula(
spl_object_id($arg_value),
spl_object_id($arg_value),
$arg_value,
$context->self,
$statements_analyzer,
$statements_analyzer->getCodebase()
);
} elseif ($single_rule instanceof Falsy) {
$assert_clauses = Algebra::negateFormula(
FormulaGenerator::getFormula(
spl_object_id($arg_value),
spl_object_id($arg_value),
$arg_value,
$context->self,
$statements_analyzer,
$codebase
)
);
} elseif ($single_rule instanceof IsType
&& $single_rule->type instanceof TTrue
) {
$conditional = new VirtualIdentical(
$arg_value,
new VirtualConstFetch(new VirtualName('true'))
);
$assert_clauses = FormulaGenerator::getFormula(
mt_rand(0, 1_000_000),
mt_rand(0, 1_000_000),
$conditional,
$context->self,
$statements_analyzer,
$codebase
);
}
$simplified_clauses = Algebra::simplifyCNF(
array_merge($context->clauses, $assert_clauses)
);
$assert_type_assertions = Algebra::getTruthsFromFormula(
$simplified_clauses
);
$type_assertions = array_merge($type_assertions, $assert_type_assertions);
}
}
$changed_var_ids = [];
foreach ($type_assertions as $var_id => $_) {
$asserted_keys[$var_id] = true;
}
$codebase = $statements_analyzer->getCodebase();
if ($type_assertions) {
$template_type_map = [];
// while in an and, we allow scope to boil over to support
// statements of the form if ($x && $x->foo())
$op_vars_in_scope = Reconciler::reconcileKeyedTypes(
$type_assertions,
$type_assertions,
$context->vars_in_scope,
$context->references_in_scope,
$changed_var_ids,
$asserted_keys,
$statements_analyzer,
$template_type_map,
$context->inside_loop,
new CodeLocation($statements_analyzer->getSource(), $expr)
);
foreach ($changed_var_ids as $var_id => $_) {
if (isset($op_vars_in_scope[$var_id])) {
$first_appearance = $statements_analyzer->getFirstAppearance($var_id);
if ($first_appearance
&& isset($context->vars_in_scope[$var_id])
&& $context->vars_in_scope[$var_id]->hasMixed()
) {
if (!$context->collect_initializations
&& !$context->collect_mutations
&& $statements_analyzer->getFilePath() === $statements_analyzer->getRootFilePath()
&& (!(($parent_source = $statements_analyzer->getSource())
instanceof FunctionLikeAnalyzer)
|| !$parent_source->getSource() instanceof TraitAnalyzer)
) {
$codebase->analyzer->decrementMixedCount($statements_analyzer->getFilePath());
}
IssueBuffer::remove(
$statements_analyzer->getFilePath(),
'MixedAssignment',
$first_appearance->raw_file_start
);
}
$op_vars_in_scope[$var_id]->from_docblock = true;
foreach ($op_vars_in_scope[$var_id]->getAtomicTypes() as $changed_atomic_type) {
$changed_atomic_type->from_docblock = true;
if ($changed_atomic_type instanceof TNamedObject
&& $changed_atomic_type->extra_types
) {
foreach ($changed_atomic_type->extra_types as $extra_type) {
$extra_type->from_docblock = true;
}
}
}
}
}
$context->vars_in_scope = $op_vars_in_scope;
}
}
/**
* This method looks for problems with a generated TemplateResult.
*
* The TemplateResult object contains upper bounds and lower bounds for each template param.
*
* Those upper bounds represent a series of constraints like
*
* Lower bound:
* T >: X (the type param T matches X, or is a supertype of X)
* Upper bound:
* T <: Y (the type param T matches Y, or is a subtype of Y)
* Equality (currently represented as an upper bound with a special flag)
* T = Z (the template T must match Z)
*
* This method attempts to reconcile those constraints.
*
* Valid constraints:
*
* T <: int|float, T >: int --- implies T is an int
* T = int --- implies T is an int
*
* Invalid constraints:
*
* T <: int|string, T >: string|float --- implies T <: int and T >: float, which is impossible
* T = int, T = string --- implies T is a string _and_ and int, which is impossible
*/
public static function checkTemplateResult(
StatementsAnalyzer $statements_analyzer,
TemplateResult $template_result,
CodeLocation $code_location,
?string $function_id
): void {
if ($template_result->lower_bounds && $template_result->upper_bounds) {
foreach ($template_result->upper_bounds as $template_name => $defining_map) {
foreach ($defining_map as $defining_id => $upper_bound) {
if (isset($template_result->lower_bounds[$template_name][$defining_id])) {
$lower_bound_type = TemplateStandinTypeReplacer::getMostSpecificTypeFromBounds(
$template_result->lower_bounds[$template_name][$defining_id],
$statements_analyzer->getCodebase()
);