template expanding to multiple sequence members

[doofenstein]

I think that's not possible with Nim's templating system, because a template 
can only expand into a single NimNode, while this would require expanding into 
two sibling NimNodes.

Idk what you want to archieve, but how about something like this?
    
    
    const lut = static:
      var result: seq[int]
      template entry(x: int) =
        result.add(x)
        result.add(x shr 2)
      entry 42
      entry 12
      entry 6
      result
    
    
    Run