Specs

add(money_1 :: t(), money_2 :: t()) ::
  {:ok, t()} | {:error, {module(), String.t()}}

Add two Money values.

Arguments

• money_1 and money_2 are any valid Money.t types returned by Money.new/2

Returns

• {:ok, money} or

• {:error, reason}

Example

iex> Money.add Money.new(:USD, 200), Money.new(:USD, 100)
{:ok, Money.new(:USD, 300)}

iex> Money.add Money.new(:USD, 200), Money.new(:AUD, 100)
{:error, {ArgumentError, "Cannot add monies with different currencies. " <>
  "Received :USD and :AUD."}}