Re: Is it possible to use a template to choose between foreach and foreach_reverse?

[Mihail K via Digitalmars-d-learn]

On Saturday, 4 June 2016 at 14:32:23 UTC, pineapple wrote:
It would be fantastic if I could write this -
    static if(forward){
        foreach(item; items) dostuff();
    }else{
        foreach_reverse(item; items) dostuff();
    }

as something like this -

    foreach!forward(item; items) dostuff();

Is there any way to accomplish this?

As far as I recall, foreach_reverse is deprecated in favour of 
range operations.
ie.

  import std.algorithm, std.range;

  static if(forward)
  {
      items.each!(item => doStuff());
  }
  else
  {
      items.retro.each!(item => doStuff());
  }

As for your question, I suggest writing a range function that 
calls retro conditionally. Something like,

  items.direction!(forward).each!(item => doStuff());