Sorry to interrupt, I am a newbie in C++ and Asio...
I just come from here Asio difference between prefer, require and make_work_guard.
I am trying to make a "dummy work" for my io_context.
It is really confusing to a beginner who just wants to make a simple "UDP socket".
The ancient book from Packt and Youtube (https://www.youtube.com/watch?v=2hNdkYInj4g&t=2292s) tutorial tells me to use "work()", the old document tell me to use a much more complex class called "excutor_work_guard", and the new fashion document just tell me to use something extremely unreadable "require()"...
Could I just use "make_work_guard()" and forget about everything else?
Sorry for my English...
As you state yourself, this is a full duplicate of the linked question.
The answer there answers every point you make here.
The ancient book from Packt and Youtube (https://www.youtube.com/watch?v=2hNdkYInj4g&t=2292s) tutorial tells me to use "work()"
I have bad experiences with Packt books on Asio¹. Regardless, there was never a function work(). You probably meant
boost::asio::io_service svc;
boost::asio::io_service::work work(svc);
The newer interface is indeed
boost::asio::io_context ioc;
auto work = make_work_guard(ioc);
That's it.
and the new fashion document just tell me to use something extremely unreadable "require()"...
I have never (ever) seen that anywhere. Can you point me to the place where you found that? In fact, as the linked answer points out, it can be a bad idea to tie work to executors, because it spreads by copying, losing control and inviting deadlocks.
Could I just use "make_work_guard()" and forget about everything else?
Yeah. That's what the other answer already said. If you're in doubt, just re-read the summary there :)