How to get the struct type in Elixir

Check this out:

iex(1)> some_struct = %MyApp.User{}
iex(2)> %type{} = some_struct
iex(3)> type
MyApp.User

That’s just a hook point for a bunch of cool facilities, like function call by module type:

defmodule Chess.Bishop do
  def move(piece), do: move_diagonally(piece)
end

defmodule Chess.Rook do
  def move(piece), do: move_straight(piece)
end

defmodule Chess.Pawn do
  def move(piece), do: move_forward(piece)
end

And then in console:

iex(1)> piece = get_chess_piece()
iex(2)> %module{} = piece
iex(3)> module.move(piece)

Have fun! If you'd like to learn more about structs in Elixir, check this blog post: Elixir Trickery: Cheating on Structs, And Why It Pays Off.