[cfe-dev] Emulation of VC++ preprocessor

[Edward Diener via cfe-dev]

Does the clang emulation of the VC++ non-standard preprocessor ever 
occur when clang ( or clang++ ) are invoked as opposed to clang-cl being 
invoked ?

Conversely is the macro _MSC_VER ever predefined when clang ( or clang++ 
) are invoked as opposed to clang-cl being invoked ?

I am hoping the answer to both questions above is 'no', but if it is not 
I need to know what the exceptions are and why.