lecture 05

lectures/05/lec5b.ex

@@ -0,0 +1,31 @@
+defmodule M do
+  defmacro context() do
+	# macro's context
+	IO.inspect(__MODULE__)
+	quote do
+	  # caller's context
+	  IO.inspect(unquote(__MODULE__))
+	  IO.inspect(__MODULE__)
+	end
+  end
+
+  defmacro twice(x) do
+	quote do
+	  unquote(x) + unquote(x)
+	end
+  end
+
+  defmacro twice_v2(x) do
+	quote bind_quoted: [x: x] do
+	  x + x
+	end
+  end
+end
+
+defmodule Test do
+  import M
+
+  def test() do
+	context()
+  end
+end