Error when interpolating a map property

[danielberkompas]

If you interpolate a map property in a verb, like this:

people = [%{name: "Daniel"}, %{name: "Hunter"}]

twiml do
  Enum.each people, fn person ->
    say "Hello, #{person.name}!"
  end
end

You'll get an error. This is because of a funky thing with macro generation, where it tries to figure out if the argument passed into say is a string or not. Since it contains an interpolation, it tries to execute the interpolation, but in the wrong context, where the person.name binding is not set.

Instead, it should pattern match for :<<>>>.