Packages

funx

0.2.0
0.8.8 0.8.7 0.8.6 0.8.5 0.8.4 0.8.3 0.8.2 0.8.1 0.8.0 0.7.1 0.7.0 0.6.1 0.6.0 0.5.0 0.4.2 0.4.0 0.3.0 0.2.3 0.2.2 0.2.1 0.2.0 0.1.7 0.1.6 0.1.5 0.1.4 0.1.3

Functional programming abstractions for Elixir (Beta release: APIs may change before 1.0)

HexDocs

Current section

Files

Jump to
Readme
26 Versions
1 Dependency
Dependants
Files
Activity
funx lib monoid pred_all.ex
Raw

lib/monoid/pred_all.ex 

# credo:disable-for-this-file



defmodule Funx.Monoid.Predicate.All do

  @moduledoc """

  A Monoid implementation for combining predicates using logical AND.

  """

  defstruct value: &Funx.Monoid.Predicate.All.default_pred?/1



  def default_pred?(_), do: true

end



defimpl Funx.Monoid, for: Funx.Monoid.Predicate.All do

  alias Funx.Monoid.Predicate.All



  def empty(_), do: %All{}



  def append(%All{} = p1, %All{} = p2) do

    %All{

      value: fn value -> p1.value.(value) and p2.value.(value) end

    }

  end



  def wrap(%All{}, value) when is_function(value, 1) do

    %All{value: value}

  end



  def unwrap(%All{value: value}), do: value

end