[Bug c++/63940] C++ constexpr errors on AIX

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63940

--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Created attachment 34030
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34030&action=edit
preprocessed source for testcase