https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91558
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Yichen Yan from comment #0)
> Detail:
> Constexpr for <complex> is in C++14 if I don't misunderstand. But a lot of
> testcases under libstdc++-v3/testsuite/26_numerics/complex/ (e.g. dr844.cc)
Are you sure? That test doesn't seem to care about constexpr.
> runs with C++11 and check for constexpr (and pass).
>
> I haven't found some manual or doc explaining that, and wonder if this is a
> bug or some feature?
The mailing lists are a better place to ask a question like that.
Adding constexpr to std::complex was done by r166171 many years ago. I think at
the time implementations were allowed to add constexpr as a conforming
extension. I don't see a compelling reason to change it now.
