Presenter

Preso.exs

defmodule Preso do
  # shows what was passed in and then evals it and shoves the
  # lhs back into the current context
  defmacro show(stuff) do
    {op, _, [{lhs,_, _}, rhs]} = stuff
    IO.write "#{IO.ANSI.blue}#{IO.ANSI.bright}"
    IO.write "#{lhs} #{op} "
    IO.inspect rhs
    IO.puts "#{IO.ANSI.reset}"
    quote do
      # export it back to the callers context
      var!(ret) = unquote(stuff)
    end
  end
end