Internals of the async/await pattern from first principles

https://github.com/Dobiasd/articles/blob/master/internals_of_the_async_await_pattern_from_first_principles.md

by Dobiasd • 2 years ago

57 15 2 years ago

github.com

_nalply2• 2 years ago

Which programming language is that?

latchkey6• 2 years ago

First comment in the first example says:

// We're using an imaginary programming language here.

Sadly, not answering the 'why'.

ac2u• 2 years ago

I think it's actually a good move here, using a real language would invite too many comments getting caught in the weeds along the lines of: "actually the language does X, Y and Z to implement coroutines which this article skips over"

_nalply2• 2 years ago

I tend to ignore comments in example programs because they look like this:

    // Set x to 42
    x += 42

It's a form of banner blindness.

By the way, first I felt a strong Pythonic vibe but then I realized that the colons after the statements were missing. I asked ChatGPT and it said Nim. I opened the Nim homepage and realized that Nim also uses the colons. Then it said it is probably just a form of pseudo-code, and it was right.

I reread the whole article to find the clue but never thought to read the commments. Really weird of me.

P.S. Did you see the mistake in the comment before you got here?

happytoexplain2• 2 years ago

Regarding the second code snippet - I've never seen this language feature before. Obviously there are things sometimes called generators implemented as structures, where 'step' or 'next' is just a normal method, but is there a real world example of what is shown?

Dobiasd4• 2 years ago

Thanks for the feedback! My code snippets in the article don't use any real/existing language. C# for example, is quite explicit with the transformation of generated to state machines, but also does not provide such methods, as far as I know. I've just added a comment explaining this choice: https://github.com/Dobiasd/articles/commit/f44b897f2a4d20aa9...

Internals of the async/await pattern from first principles

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