anchor.diff:    module procedure :: datetime_constructor
   endinterface datetime
   
  -interface operator(+)
  -  module procedure :: timedelta_plus_datetime
  -endinterface
  +!interface operator(+)
  +!  module procedure :: timedelta_plus_datetime
  +!endinterface
   
   !=======================================================================
   contains
  
positive.code: private
  
  public :: datetime
  public :: operator(+)
  public :: date2num
  public :: datetimeRange
  public :: daysInMonth
  
negative.code: ! Copyright (c) 2013-2016, Wavebit Scientific LLC
  ! All rights reserved.
  ! 
  ! Licensed under the BSD 3-clause license. See LICENSE for details.
  !
  module mod_datetime
  !=======================================================================
  