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dialyxir

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Mix tasks to simplify use of Dialyzer in Elixir projects.

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dialyxir lib dialyxir warnings exact_equality.ex
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lib/dialyxir/warnings/exact_equality.ex 

defmodule Dialyxir.Warnings.ExactEquality do

  @moduledoc """

  The expression can never evaluate to true.



  ## Example



      defmodule Example do

        def ok() do

          :ok == :error

        end

      end

  """



  @behaviour Dialyxir.Warning



  @impl Dialyxir.Warning

  @spec warning() :: :exact_eq

  def warning(), do: :exact_eq



  @impl Dialyxir.Warning

  @spec format_short([String.t()]) :: String.t()

  def format_short(args), do: format_long(args)



  @impl Dialyxir.Warning

  @spec format_long([String.t()]) :: String.t()

  def format_long([type1, op, type2]) do

    pretty_type1 = Erlex.pretty_print_type(type1)

    pretty_type2 = Erlex.pretty_print_type(type2)



    "The test #{pretty_type1} #{op} #{pretty_type2} can never evaluate to 'true'."

  end



  @impl Dialyxir.Warning

  @spec explain() :: String.t()

  def explain() do

    @moduledoc

  end

end