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Hi all,
I have defined this pair of templates :
template<class T>
inline
CArchive& AFXAPI operator >>(CArchive& ar, T& t)
{
...
}
template<class T>
CArchive& AFXAPI operator >>(CArchive& ar, <B>std::vector<T></B>& v)
{
...
}
Excuse the last message :), as I was saying, I have defined this pair of templates :
template<class T>
inline
CArchive& AFXAPI operator >>(CArchive& ar, T& t)
{
...
}
template<class T>
CArchive& AFXAPI operator >>(CArchive& ar, std::vector<T>& v)
{
...
}
when I compile:
...
std::vector<short> m_vector;
ar >> m_vector;
...
I get the following error :
error C2667: '>>' : none of 2 overload have a best conversion
error C2593: 'operator >>' is ambiguous
why it is ambiguous? it is not the second version a better conversion? and how do I get rid of it?
adios!
According to Stroustrup (The C++ Programming Language, 3rd Ed., sect. 13.5.2), that should work.
He shows a specialised version of a swap function:
template <class T> void swap(T& x, T& y)
{
T t = x;
x = y;
y = t;
}
then suggests that for vectors, a more efficient method is required:
template <class T> void swap(vector<T>& x, vector<T>& y)
{
x.swap(y); // let vector handle it
}
This doesn't compile under VC++6.0 either... so maybe VC6 just can't handle it.
The STL classes declare specialised swap methods as friend functions inline in the relevant class declaration. Maybe you could try this with a derived vector class...
I don't really know :-(
Dave
Thanks for your input Dave...I also think this is a MS VC "limitation".
>:u(
I will remove one of the templates.
Adiós!