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money

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Elixir library for working with Money safer, easier, and fun, is an interpretation of the Fowler's Money pattern in fun.prog.

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money lib money sigils.ex
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lib/money/sigils.ex 

defmodule Money.Sigils do

  @moduledoc false



  @doc ~S"""

  Handles the sigil `~M` for Money



  The lower case `~m` variant does not exist as interpolation and excape

  characters are not useful for Money sigils.



  ## Usage



      import Money.Sigils

      ~M[1000] # With a configured default currency (e.g. GBP)

      #> %Money{amount: 1000, currency: :GBP3}



      ~M[1000]USD

      #> %Money{amount: 1000, currency: :USD}



  """

  defmacro sigil_M({:<<>>, _meta, [amount]}, []),

    do: Macro.escape(Money.new(to_integer(amount)))



  defmacro sigil_M({:<<>>, _meta, [amount]}, [_ | _] = currency),

    do: Macro.escape(Money.new(to_integer(amount), List.to_atom(currency)))



  defp to_integer(string) do

    string

    |> String.replace("_", "")

    |> String.to_integer()

  end

end