[cfe-dev] Determining the -std=xxx option possibilities for C++ in clang releases

[Edward Diener via cfe-dev]

Is there any way, beyond pure experimentation, to determine the possible 
-std=xxx possibilities for C++ compilation in past and current clang 
releases ?

I can find no documentation, aside from C language possibilities for the 
-std option, in either the documentation or the clang --help command, 
for any given clang release which tells me what the possible -std 
possibilities are for C++ compilation. I am interested in the 
possibilities for clang 3.4 up to the present source.