http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11393
--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-10-26 00:02:09 UTC --- (In reply to comment #21) > In my opinion, floating point literals are allowed in constant expressions in > the C++11 standard. They're only valid with 'constexpr' which isn't used in the testcases in this PR (and can't be in C++98)