A quick, unprofessional and not too serious draft for a triple plus operator in C# :)

gistfile1.cs

public void TriplePlus()
{
  int coffee = 0;

  // constant linear growth by 1 on every access until reset
  IEnumerable<int> drink = coffee+++;

  var enjoy = 
    from slurp in drink
    where slurp <= 100
      && slurp % 3 == 0
    select "nomnom";

  // reset by setting it.
  coffee = 0;

  // iterator is done.
  drink.Any() == false;
}

public IEnumerable<int> TriplePlusPerformsARange(int from, int to)
{
  return (int coffee+++)
    .Where(slurp => slurp >= from && slurp <= to);
}

public bool TriplePlusPerformsStepping()
{
  return (int coffee+++2)
    .All(slurp => slurp % 2 == 0);
}