0586 Using Macro

Author: knowthen

lectures/macros/macro_using.exs

@@ -0,0 +1,27 @@
+defmodule Html do
+  defmacro __using__(_opts) do
+    quote do
+      import Html
+    end
+  end
+  
+  def div(content), do: tag("div", content)
+
+  def p(content), do: tag("p", content)
+
+  def span(content), do: tag("span", content)
+  
+  defp tag(name, content) do
+    "<#{name}>#{content}</#{name}>"
+  end
+end
+
+defmodule Page do
+  use Html
+  def view(content) do
+    content
+    |> span()
+    |> p()
+    |> div()
+  end
+end