cblavier

defmodule MyApp.Facade do

  defmacro facade(mod) do
    quote bind_quoted: [mod: mod] do
      Enum.each apply(mod, :__info__, [:functions]), fn {fun, arity} ->
        case arity do
          0 -> defdelegate unquote(fun)(), to: mod
          _ ->
            values = Enum.map(1..arity, &(Macro.var(:"arg#{&1}", mod)))
            defdelegate unquote(fun)(unquote_splicing(values)), to: mod