[Bug libstdc++/61791] [C++11] [constexpr] Additional overloads of std::real should be a constexpr function

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61791

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2015-04-09 00:00:00         |2017-1-25

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Same problem with std::imag(T)

#include <complex>
constexpr auto r = std::real(0.0);
constexpr auto i = std::imag(0.0);