defmodule Xema.NoLoader do
  @moduledoc """
  The default loader.

  For the loader configuration see "[Configure a loader](loader.html)".
  """

  @behaviour Xema.Loader

  @doc """
  Returns for `any` data always the error tuple
  `{:error, "No loader configured."}`.

  ## Examples

      iex> Xema.NoLoader.fetch(nil)
      {:error, "No loader configured."}
  """
  @spec fetch(any :: any) :: {:error, binary}
  def fetch(_), do: {:error, "No loader configured."}
end