16 lines
518 B
Elixir
16 lines
518 B
Elixir
defmodule Cannery.ComparableDateTime do
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@moduledoc """
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A custom `DateTime` module that provides a `compare/2` function that is
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comparable with nil values
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"""
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@spec compare(DateTime.t() | any(), DateTime.t() | any()) :: :lt | :gt | :eq
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def compare(%DateTime{} = datetime_1, %DateTime{} = datetime_2) do
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DateTime.compare(datetime_1, datetime_2)
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end
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def compare(%DateTime{}, _datetime_2), do: :lt
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def compare(_datetime_1, %DateTime{}), do: :gt
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def compare(_datetime_1, _datetime_2), do: :eq
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end
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