http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54483
--- Comment #3 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2012-09-05 11:12:13 UTC --- (In reply to comment #1) > This is invalid as per [class.static.data]/3 : On C++11 level it should be valid, because odr-usage does not happen here according to [basic.def.odr] p3: "A variable x whose name appears as a potentially-evaluated expression ex is odr-used unless x is an object that satisfies the requirements for appearing in a constant expression (5.19) and ex is an element of the set of potential results of an expression e, where either the lvalue-to-rvalue conversion (4.1) is applied to e, or e is a discarded-value expression (Clause 5)."
