Packages

pathex

1.0.1
2.6.1 2.6.0 2.5.3 2.5.2 2.5.1 2.5.0 2.4.3 2.4.2 2.4.1 2.4.0 2.3.0 2.2.0 2.1.0 2.0.0 1.3.0 1.2.0 1.1.0 1.0.1 1.0.0 0.3.0 0.2.1 0.2.0 0.1.0

Functional lenses for nested structures

HexDocs

Current section

Files

Jump to
Readme
23 Versions
0 Dependencies
Dependants
Files
Activity
pathex lib pathex builder viewers matchable_viewer.ex
Raw

lib/pathex/builder/viewers/matchable_viewer.ex 

defmodule Pathex.Builder.MatchableViewer do



  @moduledoc """

  Viewer-builder which creates function which matches with one big case

  """



  alias Pathex.Common

  import Pathex.Builder.Viewer

  @behaviour Pathex.Builder



  @structure_variable {:x, [], Elixir}

  @function_variable {:function, [], Elixir}



  def build(combination) do

    getters =

      combination

      |> Pathex.Combination.to_paths()

      |> Enum.flat_map(& path_to_getter(&1))



    (getters ++ fallback())

    |> Common.to_case()

    |> Pathex.Builder.Code.new_arg_pipe([@structure_variable, @function_variable])

  end



  defp path_to_getter(path) do

    x = {:x, [], Elixir}

    {:ok, match} = match_from_path(path, x)

    quote do

      unquote(match) -> {:ok, unquote(x)}

    end

  end



end