How to emplace object with no-argument constructor into std::map?

Question

I want to emplace an object into a std::map whose constructor does not take any arguments. However, std::map::emplace seems to require at least one

Answer 1

Class ToolMap() 
{
 friend class std::map;
  public (std::map)Object ToolMap()
  {
     return Object;
  }

}