How to add element to various container depending of type using template

Question

I\'ve got rather silly question but I hope that you can help me with that.

I\'ve got class with multiple vectors, and this vectors have different storage types.

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Answer 1

This may be a use case for a Tagged Tuple library. It makes it possible to index containers by associated type. So code dealing with dozens of similar vector> V1; fields becomes generic:

#include 

#include 
#include 
#include 
#include 

class BaseClass{::std::string Name;};
class B : public BaseClass{};
class C : public BaseClass{};

class A
{
    public: template using
    t_Vector = ::std::vector<::std::pair<::std::string, x_Item>>;

    public: using
    t_Vectors = ::n_vtt::n_container::t_TaggedTuple
     value type mapping
        B, t_Vector
    ,   C, t_Vector
    >;

    private: t_Vectors m_vectors;

    public: template void
    Add_Item(x_Item && item)
    {
        m_vectors
            // invoke either Get_MutableItem or Get_MutableItem
            .Get_MutableItem<::std::remove_reference_t<::std::remove_cv_t>>()
            // add item into corresponding std::vector
            .emplace_back(::std::string{}, ::std::forward(item));
    }
};

int main()
{
    A a;
    a.Add_Item(B{});
    C c{};
    a.Add_Item(c);
    return 0;
}