Tasks and await

[lsoft]

I have no defined opinion for these topics, and only start this discussion to share info and thoughs.

Task in the method parameter list

Now ISG removes Task (and ValueTask) from the sync method parameter list. I'm not sure it is the best behavior. Remember, Tasks is bigger than async-await scope. Tasks was successfully used in net framework 4.0 era, without any async-await.

So, It looks reasonable to allow sync method to consume Task in its parameter list. Like the following:

public class MyClass
{
    public async Task MyMethodAsync(Task t) { ... }
    public void MyMethod(Task t) { ... } <-- source generated
}

May be some switch would be useful, I don't know.

awaiting Task

What if ISG will convert await myTask (where myTask is a real task, a variable) to myTask.Wait()?

public class MyClass
{
    private Task _t = ...;
    public async Task MyMethodAsync() { await _t; }
    public void MyMethod() { _t.Wait(); } <-- source generated
}

Now, ISG will remove await _t; from the body of sync method.

I understand that it makes no sense to improve ISG again and again indefinitely, to cover all conceivable options. We need to stop at some place, so these cases may be out of the scope we want to support.