You can also define your own subtype of Order. See base/order.jl.
> On Jul 3, 2014, at 2:57 PM, Keith Campbell <keithcc1...@gmail.com> wrote: > > Functors might be a workaround. See e.g. > http://numericextensionsjl.readthedocs.org/en/latest/functors.html#motivating-example > >>