Linking two function pointers

I have a vector of function pointers (void (*)()) representing a list of actions you have already taken. How could I pop out the last two and make it into one function pointer and put it back in the list?

Example:

void link_last_two(std::vector<void (*)()> actions) {
    if(actions.size() <= 1) return;
    void (*first)() = actions.back();
    actions.pop_back();
    void (*second)() = actions.back();
    actions.push_back([](){first(); second();});
}