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BinStruct is a library which provides you rich set of tools for parsing/encoding binaries

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bin_struct lib bin_struct macro function_arity.ex
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lib/bin_struct/macro/function_arity.ex 

defmodule BinStruct.Macro.FunctionArity do



  @moduledoc false



  def function_arity(function, _env) do



    case function do



      #when is function reference

      {:&, _,

        [

          {:/, _,

            [{ _function_name, _, _}, arity]}

        ]} ->



        arity



      #when is anonymous function

      _function -> :unknown



    end



  end







end