[Bug c++/57734] Returning template alias to enum class fails with "invalid declarator"

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57734

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
This isn't just about returning, eg:

typedef eclass_alias<void> test;