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markright

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**The extended, configurable markdown-like syntax parser, that produces an AST.** Supports the full set of `markdown`, plus extensions (custom markup with a bit of elixir code to handle parsing.) The AST produced is understandable by [`XmlBuilder`](https://github.com/joshnuss/xml_builder).

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markright lib markright helpers img_link.ex
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lib/markright/helpers/img_link.ex 

defmodule Markright.Helpers.ImgLink do

  @moduledoc ~S"""

  Common code for `Markright.Parsers.Img` and `Markright.Parsers.Link`.

  """



  defmacro __using__(_opts) do

    quote do

      alias Markright.Continuation, as: Plume

      ##############################################################################



      @spec astify(String.t(), Markright.Continuation.t()) :: Markright.Continuation.t()

      defp astify(part, plume)



      ##############################################################################



      Enum.each(~w/]( |/, fn delimiter ->

        @delimiter delimiter

        defp astify(<<@delimiter::binary, rest::binary>>, %Plume{} = plume) do

          with {tail, plume} <- Plume.detail!(plume),

               %Plume{} = plume <- astify(rest, plume),

               do: %Plume{plume | ast: [tail, plume.ast], tail: plume.tail}

        end

      end)



      Enum.each(~w/] )/, fn delimiter ->

        @delimiter delimiter

        defp astify(<<@delimiter::binary, rest::binary>>, %Plume{} = plume),

          do: Plume.astail!(plume, rest)

      end)



      Module.delete_attribute(__MODULE__, :delimiter)



      defp astify(<<letter::binary-size(1), rest::binary>>, %Plume{} = plume),

        do: astify(rest, Plume.tail!(plume, letter))

    end

  end

end