/**
* @param string $string
* A string representing a type
*
* @param Context $context
* The context in which the type string was
* found
*
* @return Type
* Parse a type from the given string
*/
public static function fromStringInContext(string $string, Context $context) : Type
{
assert($string !== '', "Type cannot be empty");
// Extract the namespace, type and parameter type name list
$tuple = self::typeStringComponents($string);
$namespace = $tuple->_0;
$type_name = $tuple->_1;
$template_parameter_type_name_list = $tuple->_2;
// Map the names of the types to actual types in the
// template parameter type list
$template_parameter_type_list = array_map(function (string $type_name) use($context) {
return Type::fromStringInContext($type_name, $context)->asUnionType();
}, $template_parameter_type_name_list);
// @var bool
// True if this type name if of the form 'C[]'
$is_generic_array_type = self::isGenericArrayString($type_name);
// If this is a generic array type, get the name of
// the type of each element
$non_generic_array_type_name = $type_name;
if ($is_generic_array_type && false !== ($pos = strrpos($type_name, '[]'))) {
$non_generic_array_type_name = substr($type_name, 0, $pos);
}
// Check to see if the type name is mapped via
// a using clause.
//
// Gotta check this before checking for native types
// because there are monsters out there that will
// remap the names via things like `use \Foo\String`.
$non_generic_partially_qualified_array_type_name = $non_generic_array_type_name;
if ($namespace) {
$non_generic_partially_qualified_array_type_name = $namespace . '\\' . $non_generic_partially_qualified_array_type_name;
}
if ($context->hasNamespaceMapFor(\ast\flags\USE_NORMAL, $non_generic_partially_qualified_array_type_name)) {
$fqsen = $context->getNamespaceMapFor(\ast\flags\USE_NORMAL, $non_generic_partially_qualified_array_type_name);
if ($is_generic_array_type) {
return GenericArrayType::fromElementType(Type::make($fqsen->getNamespace(), $fqsen->getName(), $template_parameter_type_list));
}
return Type::make($fqsen->getNamespace(), $fqsen->getName(), $template_parameter_type_list);
}
// If this was a fully qualified type, we're all
// set
if (!empty($namespace) && 0 === strpos($namespace, '\\')) {
return self::make($namespace, $type_name, $template_parameter_type_list);
}
if ($is_generic_array_type && self::isNativeTypeString($type_name)) {
return self::fromInternalTypeName($type_name);
} else {
// Check to see if its a builtin type
switch (strtolower(self::canonicalNameFromName($type_name))) {
case 'array':
return \Phan\Language\Type\ArrayType::instance();
case 'bool':
return \Phan\Language\Type\BoolType::instance();
case 'callable':
return \Phan\Language\Type\CallableType::instance();
case 'float':
return \Phan\Language\Type\FloatType::instance();
case 'int':
return \Phan\Language\Type\IntType::instance();
case 'mixed':
return \Phan\Language\Type\MixedType::instance();
case 'null':
return \Phan\Language\Type\NullType::instance();
case 'object':
return \Phan\Language\Type\ObjectType::instance();
case 'resource':
return \Phan\Language\Type\ResourceType::instance();
case 'string':
return \Phan\Language\Type\StringType::instance();
case 'void':
return \Phan\Language\Type\VoidType::instance();
case 'static':
return \Phan\Language\Type\StaticType::instance();
}
}
// Things like `self[]` or `$this[]`
if ($is_generic_array_type && self::isSelfTypeString($non_generic_array_type_name) && $context->isInClassScope()) {
// Callers of this method should be checking on their own
// to see if this type is a reference to 'parent' and
// dealing with it there. We don't want to have this
// method be dependent on the code base
assert('parent' !== $non_generic_array_type_name, __METHOD__ . " does not know how to handle the type name 'parent'");
return GenericArrayType::fromElementType(static::fromFullyQualifiedString((string) $context->getClassFQSEN()));
}
// If this is a type referencing the current class
// in scope such as 'self' or 'static', return that.
if (self::isSelfTypeString($type_name) && $context->isInClassScope()) {
// Callers of this method should be checking on their own
// to see if this type is a reference to 'parent' and
// dealing with it there. We don't want to have this
// method be dependent on the code base
assert('parent' !== $type_name, __METHOD__ . " does not know how to handle the type name 'parent'");
return static::fromFullyQualifiedString((string) $context->getClassFQSEN());
}
// Merge the current namespace with the given relative
// namespace
if (!empty($context->getNamespace()) && !empty($namespace)) {
$namespace = $context->getNamespace() . '\\' . $namespace;
} else {
if (!empty($context->getNamespace())) {
$namespace = $context->getNamespace();
} else {
$namespace = '\\' . $namespace;
}
}
// Attach the context's namespace to the type name
return self::make($namespace, $type_name, $template_parameter_type_list);
}
/**
* Visit a node with kind `\ast\AST_METHOD_CALL`
*
* @param Node $node
* A node of the type indicated by the method name that we'd
* like to figure out the type that it produces.
*
* @return UnionType
* The set of types that are possibly produced by the
* given node
*/
public function visitMethodCall(Node $node) : UnionType
{
$method_name = $node->children['method'] ?? '';
// Give up on any complicated nonsense where the
// method name is a variable such as in
// `$variable->$function_name()`.
if ($method_name instanceof Node) {
return new UnionType();
}
// Method names can some times turn up being
// other method calls.
assert(is_string($method_name), "Method name must be a string. Something else given.");
try {
$class_fqsen = null;
foreach ($this->classListFromNode($node->children['class'] ?? $node->children['expr']) as $i => $class) {
$class_fqsen = $class->getFQSEN();
if (!$class->hasMethodWithName($this->code_base, $method_name)) {
continue;
}
try {
$method = $class->getMethodByNameInContext($this->code_base, $method_name, $this->context);
$union_type = $method->getUnionType();
// Map template types to concrete types
if ($union_type->hasTemplateType()) {
// Get the type of the object calling the property
$expression_type = UnionType::fromNode($this->context, $this->code_base, $node->children['expr']);
// Map template types to concrete types
$union_type = $union_type->withTemplateParameterTypeMap($expression_type->getTemplateParameterTypeMap($this->code_base));
}
// Remove any references to \static or \static[]
// once we're talking about the method's return
// type outside of its class
if ($union_type->hasStaticType()) {
$union_type = clone $union_type;
$union_type->removeType(\Phan\Language\Type\StaticType::instance());
}
if ($union_type->genericArrayElementTypes()->hasStaticType()) {
$union_type = clone $union_type;
// Find the static type on the list
$static_type = $union_type->getTypeSet()->find(function (Type $type) : bool {
return $type->isGenericArray() && $type->genericArrayElementType()->isStaticType();
});
// Remove it from the list
$union_type->removeType($static_type);
}
return $union_type;
} catch (IssueException $exception) {
return new UnionType();
}
}
} catch (IssueException $exception) {
// Swallow it
} catch (CodeBaseException $exception) {
$this->emitIssue(Issue::UndeclaredClassMethod, $node->lineno ?? 0, $method_name, (string) $exception->getFQSEN());
}
return new UnionType();
}
