http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11393
--- Comment #21 from Rich Newman <rnewman at compubrite dot com> 2012-10-25 23:48:49 UTC --- (In reply to comment #20) The EDG front-end also accepts the code fragment from comment 19 without any diagnostic message at all. In my opinion, floating point literals are allowed in constant expressions in the C++11 standard.