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perspective

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An event sourcing library based upon asynchronously generated perspectives

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perspective lib perspective reactor support macro_parser.ex
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lib/perspective/reactor/support/macro_parser.ex 

defmodule Perspective.Reactor.MacroParser do

  def capture_event_name(ast) do

    Enum.reduce_while(types(), nil, fn func, _ ->

      try do

        result = func.(ast)

        {:halt, result}

      rescue

        MatchError ->

          {:cont, nil}

      end

    end)

  end



  defp types do

    [

      &type_1/1,

      &type_2/1

    ]

  end



  defp type_1(ast) do

    {:%, _,

     [

       aliases,

       _

     ]} = ast



    aliases

  end



  defp type_2(ast) do

    {:=, _,

     [

       {:%, _,

        [

          aliases,

          _

        ]},

       _

     ]} = ast



    aliases

  end

end