Can I use generator-function with arrow function?

Question

I wander if it's possible to use arrow function with generators like this:

app.use( *() => {
 ...body of function
});

Thanks!

• Serge K.: Did you try running it ?
• Carnaru Valentin: Ok, you're ironic... and how should syntax looks like?
• Serge K.: Yes I am, you're basically asking if you can run the code you wrote, go ahead, try it yourself and see what happens ! Then, when you'll see it doesn't work, either do your own searches, or look at @hsz 's answer.
• Vladislav Ihost: If needed, you can easily omit generator function name to achieve anonymous function, like app.use(function*() { /* body of generator */ }). More discuss here: stackoverflow.com/a/34108006/7878274
• Carnaru Valentin: Yes, but for arrows function maybe works like *() => {}" or "()* => {} and so on.. You see? It's difference to be smart and think you're smart...

Answer 1

No, it's not possible to make it shorter than described in the documentation:

function* name([param[, param[, ... param]]]) {
 statements
}

Ref: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function*

Answer 2

You can, but not really in a nice way. It's not shorter and does not look that pretty. Check this out:

function* iterable(arg) {
 yield* [];
}
async function* asyncIterable(arg) {
 yield* [];
}
const arrowIterable = arg => {
 return {
 *[Symbol.iterator]() {
 yield* [];
 },
 };
};
const arrowAsyncIterable = arg => {
 return {
 async *[Symbol.asyncIterator]() {
 yield* [];
 },
 };
};

This works because an iterable is basically an object with the Symbol.iterator or Symbol.asyncIterator set to an iterator. A generator is an iterator!

Enjoy!