Will be implemented and the important bits are already implemented everywhere except GCC, claims of GCC compliance aside. Like, take the standard library for a second--only on GCC must I care about std::unordered_map versus std::tr1::unordered_map. That's a minor pain, but I don't care--I don't feel like dealing with it for GCC platforms (especially given that even after libstdc++ gets right there will be old versions floating around), so I'm only targeting Windows and OS X where clang and libc++ is available.