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[英]How do I serialise/deserialise a std::vector<bool> most efficiently?
[英]How do I serialise a template class
我正在对遗留代码进行一些后台维护。
它涉及到用STL和boost替换过时的库,同时保持接口尽可能类似于人类。
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,当我编译它时,在vos << iter.key()行出现错误:
二进制'<<':未找到采用类型为'T'的右侧操作数的运算符(或没有可接受的转换)
我猜编译器在抱怨,因为它不预先知道T是否可序列化? 但是,这在当前库中有效-我缺少什么吗?
您可以尝试:(添加template <typename T>
,删除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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