defmodule IsWhat do
  @moduledoc """
  Documentation for `IsWhat`.
  """

  @doc """
  is_what?/1

  Defines the type of the given data.

  ## Examples

      iex> IsWhat.is_what?(true)
      "true is boolean."

  """

  @spec is_what?(any()) :: String.t()
  def is_what?(nil), do: "data is nil."
  def is_what?(data) when is_binary(data), do: "#{data} is binary."
  def is_what?(data) when is_boolean(data), do: "#{data} is boolean."
  def is_what?(data) when is_atom(data), do: "#{data} is atom."
  def is_what?(data) when is_tuple(data), do: "#{inspect(data)} is tuple."
  def is_what?(data) when is_list(data), do: "#{inspect(data)} is list."
  def is_what?(data) when is_map(data), do: "#{inspect(data)} is map."
  def is_what?(data) when is_integer(data), do: "#{data} is integer."
  def is_what?(data) when is_number(data), do: "#{data} is number."
  def is_what?(data) when is_struct(data), do: "#{data} is struct."
end