All manner of errors? You use a hex literal syntax that doesn't exist--16#FF00 is Erlang and how on earth did you get "O" instead of "0". Once I fix the broke

All manner of errors? You use a hex literal syntax that doesn't exist--16#FF00 is Erlang and how on earth did you get "O" instead of "0". Once I fix the brokenness: 10> <<1:5, 2:4, 16#FF00:15, "foo">>. <<9,127,0,102,111,111>> Looks ... unsurprising? Maybe it would be nice to get a truncation warning on that 16#FF00:15, but otherwise ... fine? This looks like an advertisement that Elixir kind of sucks and you should use straight Erlang instead? Note from downthread: this is broken even in Elixir, so I really don't know what your point was.