gistfile1.ex

import Elixir.Builtin, except: ["+": 2]

defmodule DateUtils do
  def :+.(left, right) when is_tuple(left) do
    seconds = Erlang.calendar.datetime_to_gregorian_seconds(left)
    result =  seconds + right
    Erlang.calendar.gregorian_seconds_to_datetime(result)
  end

  # is this correct ?
  def :+.(left, right) do
    Elixir.Builtin.+(left, right)
  end

  def run do
   date = { { 2011, 10, 12 }, { 0, 0, 0 } } 
   day = (24 * 60 * 60)
   
    date + 2 * day
  end
end

IO.inspect DateUtils.run