How can I use the latest C++ 11 features in Clang? What (sub)set of features is supported?
Here is the always up to date list of features supported by clang:
http://clang.llvm.org/cxx_status.html
To activate C++11, you have to add -std=c++11 in your clang calls, like for gcc. If you use an IDE that is clang-aware or gcc-aware, there is a specific project settings option available to do that.