List with 3 c++ elements

Question

I’m using list in c++, and in what I think its internal structure should contain:

Content
pointer to the next element

It is possible to place one more variable within this structure, as the example below?

Content
variable string
pointer to the next element

Answer 1

No, it is not possible to modify the standard library. Anything of the kind is prohibited. You can, however, have your string variable as part of the container element:

struct Conteudo
{
    std::string str;
};

And use it as std::list<Conteudo>.