Programming Elixir ≥ 1.6

Module Attributes

Elixir modules each have associated metadata. Each item of metadata is called an attribute of the module and is identified by a name. Inside a module, you can access these attributes by prefixing the name with an at sign (@). You give an attribute a value using the syntax

@name  value

This works only at the top level of a module—you can’t set an attribute inside a function definition. You can, however, access attributes inside functions.

mm/attributes.exs

defmodule Example do
  @author  "Dave Thomas"
  def get_author do
    @author
  end
end
IO.puts "Example was written by #{Example.get_author}"

You can set the same attribute multiple times in a module. If you access that attribute in a named function ...