C++ 如何序列化模板类

我正在对遗留代码执行一些后台维护

它包括用STL和boost替换不推荐使用的库，同时尽可能保持界面的相似性

ostream& operator<<(ostream& vos, const OurList<class T>& coll)
{
    // OurList wraps an stl list with the same interface as the current library
    // OurListIterator wraps an iterator class used to access OurList

    OurListIterator<T, OurList<class T> > iter((OurList<class T>&)coll);

    // this function gets the first item in the list and then each next one
    while (iter())
    {
        // key returns the value pointed to by the iterator
        vos << iter.key();
    }
};

然而，当我编译它时，我在vos上得到一个错误您可以尝试：添加模板，删除类

尝试删除类。这还取决于T的类型。如果不为其重载运算符，T可能无法插入。

template <typename T>
ostream& operator<<(ostream& vos, const OurList<T>& coll)
{
    // OurList wraps an stl list with the same interface as the current library
    // OurListIterator wraps an iterator class used to access OurList

    OurListIterator<T, OurList<T> > iter((OurList<T>&)coll);

    // this function gets the first item in the list and then each next one
    while (iter())
    {
        // key returns the value pointed to by the iterator
        vos << iter.key();
    }
}