playing around with elixir macros

macro.ex

#!/usr/bin/env elixir

defmodule Dsl do
  defmacro __using__(_opts) do
    quote do
      import Dsl

      @before_compile Dsl

      @list Keyword.new
      
    end
  end

  defmacro set(key, val) do
    quote do
      @list Keyword.put(@list, unquote(key), unquote(val))
    end
  end

  defmacro __before_compile__(_) do
    quote do
      def get(key) do
        Keyword.get @list, key
      end
    end
  end
end

defmodule Foozle do
  use Dsl

  set :foo, "bar"
  set :baz, "boa"

  def test do
    IO.puts "foo: #{get(:foo)}"
    IO.puts "baz: #{get(:baz)}"
  end
end

IO.puts Foozle.test

# output:
# foo: bar
# baz: boa