Pattern match on struct type

pattern_match_on_struct_type.exs

defmodule Bar do
  defstruct herp: "Derp"
end

defmodule Baz do
  defstruct herp: "Derp"
end

defmodule Foo do

  def start_link do
    Task.start_link(fn -> loop end)
  end

  defp loop do
    receive do
      {%{__struct__: Bar}, caller} ->
        send caller, "bar"
        loop
      {%{__struct__: Baz}, caller} ->
        send caller, "baz"
        loop
    end
  end
end