Defaulting to equality with a @

[josephwilk]

@a=10
fact "equality with @" do
  10 |> @a
end

Raises the error

** (CompileError) test/tennis/game_test.exs:32: function '@'/2 undefined
lists.erl:1323: :lists.foreach/2
/private/tmp/elixir-NwV5/elixir-0.10.3/lib/elixir/lib/code.ex:290: Code.require_file/2
/private/tmp/elixir-NwV5/elixir-0.10.3/lib/elixir/lib/kernel/parallel_require.ex:50: Kernel.ParallelRequire."-spawn_requires/5-fun-1-"/5

Re-writing explicitly works (but you should be able to do the above):

@a=10
fact "equality with @" do
  10 |> equals @a
end

Thanks to @BjRo tennis example that helped me spot this.