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exprotobuf

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exprotobuf provides native encoding/decoding of protobuf messages via generated modules/structs.

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exprotobuf lib exprotobuf parser.ex
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lib/exprotobuf/parser.ex 

defmodule Protobuf.Parser do



  defexception ParserError, error: nil do

    def message(ParserError[error: error]) do

      inspect(error)

    end

  end



  def parse(msgs),                             do: parse(msgs, [])

  def parse(defs, options) when is_list(defs), do: :gpb_parse.post_process(defs, options)

  def parse(string, options) do

    case :gpb_scan.string('#{string}') do

      {:ok, tokens, _} ->

        lines = String.split(string, "\n", parts: :infinity) |> Enum.count

        case :gpb_parse.parse(tokens ++ [{:'$end', lines + 1}]) do

          {:ok, defs} ->

            parse(defs, options)

          error ->

            error

        end

      error ->

        error

    end

  end



  def parse!(string, options \\ []) do

    case parse(string, options) do

      {:ok, defs}     -> defs

      {:error, error} -> raise ParserError, error: error

    end

  end

end