package foo:streams-and-futures;

interface streams-and-futures {
  type t1 = stream<u8>;
  type t2 = stream<stream<string>>;
  type t3 = future;
  type t4 = future<list<u8>>;
  type t5 = option<stream<future>>;
  resource r1;
  type t6 = stream<r1>;
  type t7 = future<result<r1>>;
  type t8 = stream;

  foo: func(x: stream<u32>, y: t6) -> future<result<list<string>, string>>;
}