“不允许使用多个模板参数列表”？

Question

I'm coding a simple class to manage some code detours.

The class:

class CDetourManager {
public:

    CDetourManager() {}

    ~CDetourManager() {}

    template<convention_type tp, typename retn, typename ...args>
    VOID AddDetour( Detour<tp, retn, args...>* d ) {
        m_Detours.push_back( d );
    }

private:
    template<convention_type tp, typename retn, typename ...args>
    std::vector<Detour<tp, retn, args...>* > m_Detours;
};

But im getting a error:
Error 1 error C3857: 'CDetourManager::m_Detours': multiple template parameter lists are not allowed

Does anyone know what I could do to get rid of that error? It's my first time using templates so I'm kind of lost here :(

Answer 1

It seems that you want to store a vector of pointers to Detour s. Since each specialisation of Detour has a different (and unrelated) type, this is not possible directly. However, if you make the Detour template inherit from some IDetour interface which provides the required functions to operate on a Detour , then you can write AddDetour as:

void AddDetour(IDetour *d) {
    m_Detours.push_back(d);
}

and m_Detours as:

std::vector<IDetour *> m_Detours;