function* asdf() {
  (yield 1) || (yield 2);
  (yield b)();
  new (yield b)();
  (yield 1) ? (yield 2) : (yield 3);
  yield (1 ? 2 : 3);
  yield (yield 1);
}

function* a(b) {
  (yield xhr({ url: "views/test.html" })).data;
}

(async function* () {
  await (yield 1);
});