My first D module - Critiques welcome.

[Brad Anderson]

On Monday, 23 December 2013 at 21:34:34 UTC, John Carter wrote:
> So I resolved to learn D, and try code as idiomatically as I 
> could.
>
> So here is a trivial module that encodes and decodes roman 
> numerals.
>
> https://bitbucket.org/JohnCarter/roman/src/9ec5b36b9973426f35b0ab9dfd595cb3b305e39e/roman.d?at=default
>
> I also attempted to do it in "Best Practice Test Driven 
> Development" form
> with commits on every change.
>
> So you can see the blow by blow history of how it grew.
>
> I would welcome any critique, advice, flames, recommendations, 
> etc. etc.
>
> Thanks for your help and patience with various stupid newbie 
> questions I
> asked in the process!

You could also do some neat stuff with opDispatch.  Someone 
actually
wrote an article about using it with roman numerals:
http://idorobots.org/2012/03/04/romans-rubies-and-the-d/