Sample run of Elixir on Erjang.

gistfile1.ex

krab$ ./bin/iex 
ej -env ERL_LIBS :/Users/krab/Projects/elixir/bin/../lib -noshell -user Elixir-IEx-CLI -extra --no-halt --erl -user Elixir-IEx-CLI
Warning: could not run smart terminal, falling back to dumb one
Interactive Elixir (0.8.2.dev) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> 1/0
** (ArithmeticError) bad argument in arithmetic expression
    :erlang./(1, 0)
    :erlang.apply/2
    erl_eval.erl:572: :erl_eval.do_apply/6
    elixir.erl:133: :elixir.eval_forms/3
    server.ex:19: IEx.Server.do_loop/1
    :erlang.apply/2
    error_handler.erl:42: :error_handler.undefined_function/3
    :erlang.apply/2

iex(1)> :"java.util.Date".new().toString()
"Mon Aug 19 22:23:53 CEST 2013"
iex(2)> 

Things to notice:

• Just replace erl with ej in the bin/elixir script and you're go
• The JVM doesn't let us run the tty driver, so we're stuck in a "dumb shell" (i.e. no line editing)
• Exceptions work -- including line numbers!
• You can call out to Java.

awesome! is that R16?

Now it is.