how to adapt to callback style API about async_simple HOT 3 OPEN

but, that kind of refactoring only works with asio.

This is not true. At least not "only".

we have some old lib that accepts callbacks. now I want to call that old lib function and "co_await" for the callback to be invoked.

I didn't understand where the blocker it. Could you explain your question in detail?

from async_simple.

You need to implement awaiter for your asynchronous operation, refer to this demo and coroutine reference

from async_simple.

And we can use Future/Promise, call promise setValue in callback, and co_await future in Lazy

refer to https://github.com/alibaba/async_simple/blob/main/async_simple/coro/test/FutureAwaiterTest.cpp

from async_simple.