From: Yossef Mendelssohn <ymendel@...>
Date: 2007-07-02T22:27:08+09:00
Subject: Re: Creating a DSL in ruby

If I may, you could look into a fluent interface (http://
www.martinfowler.com/bliki/FluentInterface.html) instead of a DSL.  I
make this distinction because "DSL" seems to have become a term
meaning "something with lots of class methods and blocks" because
that's one simple Ruby implementation.

Michael Hollins suggested something like

   charge 10.dollars do
     on "10 July 2007"
     repeat 12 do
       charge 20.dollars
       every :month
       starting "30 July 2007"
     end
   end


but how about something like

 
charge(10.dollars).on(date_x).then.charge(20.dollars).every(:month).times(12).starting(date2)

instead?


If that's not enough to turn you on, look at how well it works with
mocking/stubbing in places like RSpec and Mocha (http://
mocha.rubyforge.org/examples/mocha.html).

--
-yossef