defmodule SoLazy do
  defmacro resources(path, do: nested_context) do
    quote do
      IO.puts("Print #{unquote(path)}")
      unquote(nested_context)
    end
  end
end

$ iex
Erlang/OTP 23 [erts-11.1.3] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe] [dtrace]

Interactive Elixir (1.11.1) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> require SoLazy
SoLazy
iex(2)> SoLazy.resources "/myapi" do
...(2)>   IO.puts "nested context"
...(2)> end
Print /myapi
nested context
:ok