[Bug c++/57531] lvalue required with comma operator

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57531

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |c++
           Severity|major                       |normal

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think the problem is the comma operator causes it to be a rvalue.  In that
((void)0, x) is considered rvalue rather than what you want as a lvalue.

Note C does not have ?: as lvalues so this cannot apply to C; only C++.