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snakebridge

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Compile-time generator for type-safe Elixir bindings to Python libraries

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snakebridge lib snakebridge signature_tiers.ex
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lib/snakebridge/signature_tiers.ex 

defmodule SnakeBridge.SignatureTiers do

  @moduledoc false



  @tiers %{

    "runtime" => 1,

    "text_signature" => 2,

    "runtime_hints" => 3,

    "stub" => 4,

    "stubgen" => 5,

    "variadic" => 6

  }



  @spec normalize(atom() | String.t() | nil) :: String.t() | nil

  def normalize(nil), do: nil

  def normalize(source) when is_atom(source), do: Atom.to_string(source)

  def normalize(source) when is_binary(source), do: source



  @spec rank(atom() | String.t() | nil) :: non_neg_integer()

  def rank(source) do

    source

    |> normalize()

    |> case do

      "attribute" -> Map.fetch!(@tiers, "runtime")

      value -> Map.get(@tiers, value, 999)

    end

  end



  @spec meets_min?(atom() | String.t() | nil, atom() | String.t() | nil) :: boolean()

  def meets_min?(source, min_tier) do

    rank(source) <= rank(min_tier)

  end



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

  def known_tiers, do: Map.keys(@tiers)

end