error: must use ‘class’ tag to refer to type ‘XXX’ in this scope

开发环境： Qt Creator 4.11.0
在写程序的时候，遇到了编译器报错 error: must use 'class' tag to refer to type 'thread' in this scope

void Server::incomingConnection(int socketDescriptor)
{
    thread *h = new   thread(socketDescriptor);
    connect(h,&thread::isFinished,h,&thread::deleteLater);//当线程完成后，释放内存
    h->start();
}

　　thread是我定义的一个类（线程），查找原因发现，thread是QObject类的一个函数，所以需要指明是是一个类。

QThread *QObject::thread() const

修改如下：

void Server::incomingConnection(int socketDescriptor)
{
    class thread *h = new  class thread(socketDescriptor);
    connect(h,&thread::isFinished,h,&thread::deleteLater);//当线程完成后，释放内存
    h->start();
}