defmodule Tpl do
	@moduledoc """
	Tuple library.
	"""

	@doc """
	Extract value on :ok

	## Examples
		iex> { :ok, "success" } |> Tpl.ok
		"success"
	"""
	def ok( { :ok, result } ), do: result

	@doc """
	Extract value on :error

	## Examples
		iex> { :error, "error" } |> Tpl.error
		"error"
	"""
	def error( { :error, result } ), do: result

	@doc """
	Extract value on :ok or :error

	## Examples
		iex> { :ok, "success" } |> Tpl.both
		"success"
		iex> { :error, "error" } |> Tpl.both
		"error"
	"""
	def both( { :ok, result } ), do: result
	def both( { :error, result } ), do: result
end