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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 callbacks_on_field.ex
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lib/bin_struct/macro/callbacks_on_field.ex 

defmodule BinStruct.Macro.CallbacksOnField do



  @moduledoc false



  alias BinStruct.Macro.Structs.Field

  alias BinStruct.Macro.Structs.RegisteredCallbacksMap



  def callbacks_used_while_parsing(%Field{ opts: opts }, registered_callbacks_map) do



    [

      opts[:optional_by],

      opts[:length_by],

      opts[:count_by],

      opts[:item_size_by],

      opts[:take_while_by],

      opts[:validate_by],

    ]

    |> Enum.reject(&is_nil/1)

    |> registered_version_of_callbacks(registered_callbacks_map)



  end



  defp registered_version_of_callbacks(callbacks, registered_callbacks_map) do



      Enum.map(

        callbacks,

        fn callback ->

          RegisteredCallbacksMap.get_registered_callback_by_callback(registered_callbacks_map, callback)

        end

      )



  end



end