Look at clang. In this case they already had, and continue to use, LLVM, so their only job is to turn C++11 into a bytecode, in any way possible. It has still

Look at clang. In this case they already had, and continue to use, LLVM, so their only job is to turn C++11 into a bytecode, in any way possible. It has still taken a number of the best C++ programmers and compiler designers years to accomplish, and they haven't finished yet.