Metaprogramming using a data source

Questions & Help Questions
2

s/methods/functions :slight_smile:

You can set the @doc attribute simply inline before your function def:

defmodule ExModbus.SunSpec.Fronius do
  @external_resource Path.join([__DIR__, "sunspec.csv"])
  for line <- File.stream!(Path.join([__DIR__, "sunspec.csv"]), [], :line) |> Stream.drop(1) do
    [start, _end, size, _access, _func_codes, name, desc, type, _units, _scale_factor, _range] = String.split(line, ",")

    start = String.to_integer(start)
    size = String.to_integer(size)
    name = String.to_atom(String.downcase(name))

    @doc "Function that does #{desc}"
    def unquote(name)(pid, slave_id \\ 1) do
      case ExModbus.Client.read_data(pid, slave_id, unquote(start - 1 + 40000), unquote(size)) do
        %{data: {:read_holding_registers, data}, transaction_id: transaction_id, unit_id: unit_id} ->
          data = data |> ExModbus.Types.convert_type(unquote(type))
          {:ok, %{data: data, transaction_id: transaction_id, slave_id: unit_id}}
        other ->
          IO.puts inspect other
      end
    end
  end
end