Re:JavaScript async/await implemented in V8
by masklinn on Tuesday May 17, 2016 @10:23AM
(#11713872)
Don't elide important parts of the quote. In javascript your question doesn't make sense.
> Well, either fetch() blocks, or not.
Javascript functions always block.
> If it blocks, then it should yield, its caller should yield, etc. If it doesn't block, then it can just run to completion.
If a function is async, you must yield[0]. It may not need* that capability (conditionally) and doesn't have to yield at all e.g.
function*() {
return 4;
}
is valid and will not suspend. You must still yield*[0] on it so that it is properly resolved as a generator.
[0] I think that's not an issue for async/await as it's syntactic sugar for then chains, the code itself may be converted to a generator or whatever but it will embed the driver
> Well, either fetch() blocks, or not.
Javascript functions always block.
> If it blocks, then it should yield, its caller should yield, etc. If it doesn't block, then it can just run to completion.
If a function is async, you must yield[0]. It may not need* that capability (conditionally) and doesn't have to yield at all e.g.
is valid and will not suspend. You must still yield*[0] on it so that it is properly resolved as a generator.[0] I think that's not an issue for async/await as it's syntactic sugar for then chains, the code itself may be converted to a generator or whatever but it will embed the driver