[Bug libstdc++/103448] unexpected tuple collapse

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103448

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> Yes it is called the copy (or move) constructor :).

That is:
  auto t = std::tuple(std::tuple(1,2));
  std::cout << type_name<decltype(t)>() << std::endl;

Will produce the same result.