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[英]How do I serialise/deserialise a std::vector<bool> most efficiently?
[英]How do I serialise a template class
我正在對遺留代碼進行一些后台維護。
它涉及到用STL和boost替換過時的庫,同時保持接口盡可能類似於人類。
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();
}
};
但是,當我編譯它時,在vos << iter.key()行出現錯誤:
二進制'<<':未找到采用類型為'T'的右側操作數的運算符(或沒有可接受的轉換)
我猜編譯器在抱怨,因為它不預先知道T是否可序列化? 但是,這在當前庫中有效-我缺少什么嗎?
您可以嘗試:(添加template <typename T>
,刪除class
)。
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();
}
}
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