Unable to encode Tuple about bento

[mogeko]

This problem can be solved by @fallback_to_any.

defprotocol Bento.Encoder do

  @type bencodable :: atom() | String.t() | integer() | map() | Enumerable.t()
  @type t :: iodata()

  @fallback_to_any true
  @spec encode(bencodable) :: t | :error
  def encode(value)
end

defimpl Bento.Encoder, for: Any do
  def encode(_any), do: :error
end

Now, any type that does not meet expectations (e.g. Tuple, PID, Port...) will return :error instead of reporting an error.

[mogeko]

Or, as a better choice, we can raise an Bento.EncodeError directly.

defimpl Bento.Encoder, for: Any do
  def encode(_any), do: raise Bento.EncodeError
end

It can be rescued by Bento.encode/1.