Tested MS STL with CLang?

Have anybody tried to use parts of Microsofts OpenSource STL for CLang?

Microsoft have choosen the same license as the LLVM/CLang libc++ for its STL.

Which parts can be used for CLang?
Microsoft have in its code explicitly options for CLang

for example
#ifdef __clang__

That means, it was modified, that it can be compiled either with VC++ or Clang.