Re: Macro - whileSome: none:

[mratsim]

You can do anything with macros, but in your case, you need the do notation 
like Hlaaftana showed and templates are enough:
    
    
    proc yes(): bool = true
    proc no(): bool = false
    
    template myPattern(proc1, proc2, proc3: untyped): untyped =
      var wasProc2Called = false
      if proc1():
        proc2
        wasProc2Called = true
      else:
        proc3
    
    myPattern(no): # myPattern(no)
      # if yes
      echo "statement 1"
      echo "statement 2"
    do: # If no
      echo "statement 3"
      echo "statement 4"
    
    
    Run