[Bug c++/51312] [C++0x] Wrong interpretation of converted constant expressions (for enumerator initializers)

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51312

--- Comment #11 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I'm having a look at the issue and it seems rather different than I (we)
thought. Suffices to say that it does not affect constexpr non-operator member
functions, and that sort-of explains this (ugly) workaround:

  enum : int { e = X().operator int() };

Also, isn't just about C++11 enums, eg, this should be also accepted:

  enum { e = X() };