Compile time detection of experimental compiler feature

[dxb]

Hi! I have a module that depends on `--experimental:views` and would like to be 
able to reliably detect and fail if `views` are not enabled. I currently do:
    
    
    when not compiles(block:
            var x: openArray[int]):
        {.fatal: "--experimental:views is required for this module to work" .}
    
    
    Run

I would prefer to write something like:
    
    
    when when compileOption("experimental", "views"):
        {.fatal: "--experimental:views is required for this module to work" .}
    # Or
    when when compileOption("experimental:views"):
        {.fatal: "--experimental:views is required for this module to work" .}
    
    
    Run

but the compiler currently says `Error: invalid command line option: 
'--experimental'` (Nim Compiler Version 1.7.1). Any suggestions?

Thank you.