Check whether a range is empty

[vino.B via Digitalmars-d-learn]

Hi All,

  How do i check whether a range is empty. eg. 
(!PFResutl.toRange).empty. I tired the below, but it is no 
printing Empty if the range is empty it just prints blank line.

if (!(!PFResutl.toRange).empty) { writeln("Empty"); }


From,
Vino.B