generator-yield-delegator.js

function * anotherGenerator(i) {
  yield i + 1;
  yield i + 2;
  yield i + 3;
}

function * generator(i) {
  yield* anotherGenerator(i);
}

var gen = generator(1);

gen.next().value; // 2
gen.next().value; // 3
gen.next().value; // 4