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@zilti
Created October 28, 2018 21:19
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Nested macro vs. macro plus function with eval
;; This approach works as intended:
(defn- connect-fn [instance iface method args & code]
(eval `(proxy [~iface] []
(~(symbol (.getName method)) ~args
~@code))))
(defmacro connect [instance method args & code]
`(let [functional-method# (first (clojure.lang.Reflector/getMethods (class ~instance) 1 ~(str "set" (camelcase (name method))) false))
functional-para# (symbol (.getName (first (.getParameterTypes ^Method functional-method#))))]
(~(symbol (str ".set" (camelcase (name method)))) ~instance
(connect-fn ~instance functional-para# functional-method# '~args ~@code))))
;; This here, however, does not:
(defmacro connect
"This macro is used to make use of functional interfaces."
[instance method args & code]
`(let [functional-method# (first (clojure.lang.Reflector/getMethods (class ~instance) 1 ~(str "set" (camelcase (name method))) false))
functional-para# (symbol (.getName (first (.getParameterTypes ^Method functional-method#))))]
(~(symbol (str ".set" (camelcase (name method)))) ~instance
`(proxy [~functional-para#] []
(~(symbol (.getName functional-method#)) ~'~args
~'~@code)))))
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