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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 preprocess remap_enum.ex
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lib/bin_struct/macro/preprocess/remap_enum.ex 

defmodule BinStruct.Macro.Preprocess.RemapEnum do



  @moduledoc false



  alias BinStruct.Macro.Preprocess.RemapType



  def remap_enum({:enum, enum_info_ast}, opts, env) do



    {:%{}, _meta, [type: enum_representation_type, values: enum_values]} = enum_info_ast



    { enum_values, _binding } = Code.eval_quoted(enum_values, [], env)



    enum_representation_type = RemapType.remap_type(enum_representation_type, opts, env)



    values =

      Enum.map(

        enum_values,

        fn enum_def ->



          case enum_def do



            { enum_value, enum_name } ->

              %{

                enum_value: enum_value,

                enum_name: enum_name

              }



            enum_value when is_binary(enum_value) ->

              %{

                enum_value: enum_value,

                enum_name: enum_value

              }

          end



        end

      )



    { :enum,

      %{

        type: enum_representation_type,

        values: values

      }

    }



  end



end