quote.ex

iex(33)> Code.eval_quoted(quote do: [unquote_splicing([{4, "show/:id"}])])
{[{4, "show/:id"}], []}

iex(34)> Code.eval_quoted(quote do: [unquote_splicing([{4, "show/:id", 1, 2}])])
** (CompileError) nofile: invalid quoted expression: {4, "show/:id", 1, 2}
    (elixir) src/elixir_exp.erl:408: :elixir_exp.expand_arg/2
    (elixir) src/elixir_exp.erl:384: :elixir_exp.expand_list/4
    (elixir) src/elixir_exp.erl:358: :elixir_exp.expand/2
    (elixir) src/elixir.erl:150: :elixir.quoted_to_erl/3
    (elixir) src/elixir.erl:134: :elixir.eval_forms/4
    (elixir) lib/code.ex:165: Code.do_eval_quoted/3

iex(34)>