We need to decide whether to extract implicitly declared special member functions. On one hand, extracting such functions could introduce a lot of "noise" to the documentation (since most classes would have them). On the other hand, a class could for example contain a private non-copyable non-static data member, which would make the class non-copyable but not be apparent from the public interface.
What does cppreference do? It seems reasonable to document them because they're part of the API. They're just 5 functions anyway, so it shouldn't be much noise in the documentation.
We need to decide whether to extract implicitly declared special member functions. On one hand, extracting such functions could introduce a lot of "noise" to the documentation (since most classes would have them). On the other hand, a class could for example contain a private non-copyable non-static data member, which would make the class non-copyable but not be apparent from the public interface.