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permit

0.1.3
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Plain-Elixir, DSL-less, extensible authorization library for Elixir.

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permit lib permit permissions operators is_nil.ex
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lib/permit/permissions/operators/is_nil.ex 

defmodule Permit.Operators.IsNil do

  @moduledoc """

  Nil equality operator operator, accessible via `:is_nil` or `:nil?`.

  """

  alias Permit.Operators.GenOperator



  use GenOperator



  @impl GenOperator

  def symbol,

    do: :is_nil



  @impl GenOperator

  def semantics(_, ops) do

    not? = maybe_negate(ops)



    fn field, _, _ ->

      not?.(is_nil(field))

    end

  end



  @impl GenOperator

  def alternatives,

    do: [:nil?]

end