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posexional

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A library to manage positional files

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posexional lib posexional field fixed_value.ex
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lib/posexional/field/fixed_value.ex 

defmodule Posexional.Field.FixedValue do

  @moduledoc """

  this module represent a fixed value field

  it is initialized with its value and it never change

  """

  alias Posexional.Field



  defstruct \

    value: ""



  def new(value) do

    %Field.FixedValue{value: value }

  end

end



defimpl Posexional.Protocol.FieldLength, for: Posexional.Field.FixedValue do

  def length(%Posexional.Field.FixedValue{value: value}), do: String.length(value)

end



defimpl Posexional.Protocol.FieldName, for: Posexional.Field.FixedValue do

  def name(_), do: :fixed_value

end



defimpl Posexional.Protocol.FieldWrite, for: Posexional.Field.FixedValue do

  def write(%Posexional.Field.FixedValue{value: value}, _), do: value

end



defimpl Posexional.Protocol.FieldRead, for: Posexional.Field.FixedValue do

  def read(_, content), do: content

end