> What I'm concerned about is the standard library - does it use MS'?
|Currently, the package only includes clang, clang-format, lld, and the AddressSanitizer runtime from compiler-rt, but eventually it should grow to encompass other Clang tools, lldb, and possibly other LLVM projects such as libc++.|
> Can you switch it out for another, or are you stuck with a not-fully-implemented C++ standard library?
The Microsoft implementation of the standard library is a fairly good one.
The combination of clang++ - Miscrosoft standard library is a better option than either
VS2013 compiler (almost there, but not quite) - Miscosoft standard library (pretty good)
or g++ (as good as clang++) - libstdc++ (pretty bad).
> I don't have VC++2012 Professional or VC++2010 Professional
I haven't tried it out, but it seems that the Professional edition is required only for the clang-format plugin.