http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58173
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> --- Whatever it is, must be pretty subtle, current clang++ and icc also accept it.
paolo.carlini at oracle dot com Fri, 16 Aug 2013 02:11:55 -0700
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58173
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> --- Whatever it is, must be pretty subtle, current clang++ and icc also accept it.