Support :stdio and :stderr as IO arguments

[josevalim]

[alco]

How do you see this implemented? Using a macro to convert the device argument or using a macro for defining functions in the IO module? I imagine something along the following lines:

  def read(device // :stdio, count) do
    Erlang.io.get_chars(map_device(device), "", count)
  end

  defmacrop map_device(dev) do
    case dev do
      :stdio -> :standard_io;
      :stderr -> :standard_error;
      _ -> :standard_io;
    end
  end

[josevalim]

Exactly this, but the _ -> should return whatever was given as parameter. :)

Sent from my iPhone