/**
* Handles the instanceof-operator
*
* @param PC_Obj_MultiType $e the expression
* @param PC_Obj_MultiType $name the name of the class
* @return PC_Obj_MultiType the result
*/
public function handle_instanceof($e, $name)
{
if (!$e instanceof PC_Obj_MultiType) {
return $this->handle_error('$e is invalid');
}
$cname = $name->get_string();
// if we're in a loop or the name is not a string, give up
if ($this->vars->is_in_loop() || $cname === null) {
return PC_Obj_MultiType::create_bool();
}
// if we don't know the type or its class we can't say wether its a superclass
$classname = $e->get_classname();
if ($classname === null) {
return PC_Obj_MultiType::create_bool();
}
// class-name equal?
if (strcasecmp($classname, $cname) == 0) {
return PC_Obj_MultiType::create_bool(true);
}
// if the class is unknown we can't say more
$class = $this->env->get_types()->get_class($classname);
if ($class === null) {
return PC_Obj_MultiType::create_bool();
}
// check super-classes
$super = $class->get_super_class();
while ($super != '') {
if (strcasecmp($super, $cname) == 0) {
return PC_Obj_MultiType::create_bool(true);
}
$superobj = $this->env->get_types()->get_class($super);
if ($superobj === null) {
break;
}
$super = $superobj->get_super_class();
}
// check interfaces
if ($this->is_instof_interface($class->get_interfaces(), $cname)) {
return PC_Obj_MultiType::create_bool(true);
}
return PC_Obj_MultiType::create_bool(false);
}
