[Bug c++/103084] Accepts invalid using enum declaration with an invalid elaborated-type-specifier

[terra at gnome dot org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103084

--- Comment #3 from M Welinder <terra at gnome dot org> ---
I actually think gcc is right there.

http://eel.is/c++draft/dcl.type.elab#nt:elaborated-enum-specifier

There are requirements for elaborated-type-specifier, but none for 
elaborated-enum-specifier.  It's a separate production.