Functional OO style

Fun-map is actually a pattern for property accessor, turns functions into map attributes, it does not use mutable state in its implementation. It is a functional construct, concentrate on data structure. However, OO does not means things have to be mutable state, it is a natural perspective for many problems.

In the coming release of fun-map, it includes a namespace robertluo.fun-map.oop, provide some macros to support vocabularies from OO world:

defobject allows you define an object constructer, it is actually just a function returns fum-map, but its syntax is surprisingly like the OO’s:

(defobject Shape [])

(defobject Circle [Shape]
  :shape/area
  (fnk [:circle/radius]
   (* radius radius)))