defadt(clojure.contrib.types)

Macro

Define an algebraic data type name by an exhaustive list of constructors. Each constructor can be a symbol (argument-free constructor) or a list consisting of a tag symbol followed by the argument symbols. The data type tag must be a keyword.

; clojure/contrib/types.clj:127
(defmacro defadt
  [type-tag & constructors]
  (let [meta-map-symbol (gensym "mm")]
    `(let [~meta-map-symbol {:type ~type-tag}]
       (derive ~type-tag ::adt)
       ~@(map (partial constructor-code meta-map-symbol) constructors)
       )))

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