On Tuesday, 13 October, 2015 06:11 AM, ric maicle wrote:
> Would it be possible to deprecate the old syntax, provide notice to
> all D users and make it obsolete after a year?

Please ignore. There is already a DIP filed regarding this matter.

  DIP41: dmd/rdmd command line overhaul.
  (http://wiki.dlang.org/DIP41)