Elixir assign at end of pipe

assign_pipe.ex

defmodule AssignPipe do
  # Source: https://groups.google.com/forum/#!topic/elixir-lang-core/SJUgN5enNhc
  defmacro value ~> var do
    {:=, [line: 1], [var, value]}
  end
end

defmodule Test do
  import AssignPipe

  def test() do
    3
    |> Kernel.+(1)
    |> Kernel.+(2)
    ~> r

    r + 1
  end
end

Test.test
# => 7